Abstract

The purpose of the present invention is to provide a position detection server and a position fluctuation identification method capable of readily identifying a positional shift of a device group constituting an IoT service without human intervention to the extent possible, and increasing the reliability of IoT data.　A position detection server 13d according to the present invention is provided in a data accumulation system in which terminals 11 transmit information to a management node 13 at desired timing, and the management node 13 stores the information on a per terminal 11 basis. The position detection server 13d is characterized by further comprising a position calculation unit 13d3 that compares, for each of the terminals 11, the information from the past and the information most recent, stored in the management node 13, and sets the terminal 11 having a discrepancy between the information from the past and the information most recent as a terminal 11-1 in which a position fluctuation occurred.

IPC Classes  ?

• G01S 19/23 - Testing, monitoring, correcting or calibrating of a receiver element

Abstract

A field-effect transistor according to the present invention comprises: a gate (13) formed from a plurality of intersecting electrode wires; a plurality of source electrodes (11); a plurality of drain electrodes (12); and a feed section (14) connected to one end of at least one of the plurality of electrode wires, wherein the plurality of source electrodes and the plurality of drain electrodes are disposed alternately in each of areas delimited by the plurality of electrode wires.　As a result, the present invention can provide a field-effect transistor having a low gate resistance and capable of high-power and high-frequency operation with large current drive capability.

IPC Classes  ?

• H01L 29/812 - Field-effect transistors with field effect produced by a PN or other rectifying junction gate with a Schottky gate
• H01L 21/338 - Field-effect transistors with a Schottky gate
• H01L 29/778 - Field-effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT

Abstract

An optical amplifier according to the present disclosure uses a utilization rate of excitation light in an OPA to cause the OPA to maximally and stably exhibit performance without extracting a part of signal light on a path of the signal light. The optical amplifier according to the present disclosure comprises two blocks, which are an excitation light generation unit and an optical parametric amplification unit. Further, a stabilization mechanism for excitation light output and a stabilization mechanism for the optical parametric amplifier are provided to each of the two blocks. A variable splitting-ratio coupler is provided between the two blocks and a splitting-ratio characteristic of the variable splitting-ratio coupler is used to control the two stabilization mechanisms mentioned above. Each stabilization mechanism includes control at a low speed for a temperature adjuster and control at a higher speed for a control target other than the temperature adjuster.

IPC Classes  ?

• G02F 1/39 - Non-linear optics for parametric generation or amplification of light, infrared, or ultraviolet waves

Abstract

To solve the problems, the purpose of the present invention is to provide a design method for calculating optical transmission system parameters satisfying conditions required for an optical transmission system using a light source such as an LED and a bundled optical fiber as an optical transmission path.　A design method according to the present invention designs an optical transmission system 301 comprising a light source 11 that outputs light L1, a bundled optical fiber 36 obtained by bundling a plurality of optical fibers and transmitting the light L1, a plurality of radiation units 13 each radiating light L2 to each radiation target area, and a plurality of single-core optical fibers 51a separated from the bundled optical fiber 36 and propagating light to each radiation unit 13, the design method being characterized by adjusting the parameters of the optical transmission system 301 such that the power of the light L2 output by each radiation unit 13 and calculated by using the parameters is a value considering energy required for each radiation target area.

IPC Classes  ?

• G02B 6/42 - Coupling light guides with opto-electronic elements
• G02B 6/04 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems

Abstract

One aspect of the present invention provides an optical communication control device that comprises: a plurality of wavelength selection switches each of which have a parent port and a plurality of child ports; a spatial switch in which the connection relationship between input ports and output ports is changeable, some of the input ports are connected to the parent ports of some of the plurality of wavelength selection switches, and some of the output ports are connected to the child ports of others of the plurality of wavelength selection switches; a plurality of line cascade fibers, respective one ends of which are connected to others of the input ports and the respective other ends of which are connected to the parent ports of the wavelength selection switches connected to the output ports; a plurality of client cascade fibers, respective one ends of which are connected to some others of the output ports and the respective other ends of which are connected to the child ports of the wavelength selection switches connected to the input ports; and a control unit which controls operation of the spatial switch.

IPC Classes  ?

• H04L 12/66 - Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• H04L 12/46 - Interconnection of networks

Abstract

Provided is a method for manufacturing a wavelength conversion element, including: a first step for forming an optical waveguide core substrate that has at least one periodic polarization-reversed region having a secondary nonlinear effect; a second step for joining the optical waveguide core substrate and a substrate that has a lower refractive index than the optical waveguide core substrate in at least a range of used optical wavelengths to form a joined substrate, and configuring the optical waveguide core substrate as a thin film to form an optical waveguide core layer; and a third step for processing the optical waveguide core layer of the joined substrate to form an optical waveguide core, wherein, in the third step, the polarization reversal period of a periodic polarization reversal structure of the formed optical waveguide core is adjusted at least locally by selecting the formation position of the optical waveguide core with respect to the at least one periodic polarization-reversed region.

IPC Classes  ?

• G02F 1/377 - Non-linear optics for second-harmonic generation in an optical waveguide structure

Abstract

This impact analysis device involves: acquiring, on the basis of a source code of a new version library and a source code of an old version of the library, a list of method information relating to a difference between the new version library and the old version library; extracting, from the list, a first difference relating to a method present in a first call graph of software which uses the old version library; extracting, from the list, a second difference relating to a method added to a second call graph, of the software, which uses the new version library; extracting a set of method information items on a call side of transition that have been added to the second call graph as compared to the first call graph; and outputting the union of the first difference, the second difference, and the set, thereby improving assistance in determining a possibility of impact of library update on the operation of the software.

IPC Classes  ?

• G06F 8/70 - Software maintenance or management

Abstract

A trajectory data prediction device according to one embodiment of the present disclosure has: a parameter learning unit that is configured to learn learnable parameters including parameters of Gaussian processes to which a vector field conforms, the vector field expressing a physical system in which conservation of energy or dissipation of energy is established, so as to maximize a probability distribution to which trajectory data conforms, the trajectory data representing the trajectory of a physical quantity observed in the physical system, and the learning being carried out on the basis of the similarity of the Gaussian processes; and a predicted trajectory data calculation unit that is configured to predict trajectory data satisfying the prediction condition by using the vector field, the prediction being made on the basis of the learnable parameters that have been learned and associated prediction conditions.

IPC Classes  ?

• G06N 20/00 - Machine learning

Abstract

One aspect of this invention acquires, when information representing a virtual reality space including an avatar corresponding to a user is displayed on a head-mounted display worn by the user, psychosomatic information representing a psychosomatic state of the user and generates effect information for causing the user to sense or falsely perceive a psychosomatic state on the basis of the acquired psychosomatic information. Additionally, the effect information is reflected to the avatar included in the information representing the virtual reality space and the information representing the virtual reality space including the avatar reflecting the effect information is output to the head-mounted display.

IPC Classes  ?

• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
• G06F 3/0481 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance

Abstract

Provided is a link system (1) which has a master (10) and a worker (20) that corresponds to a simulator (30), wherein, in the master (10), a storage unit (12) has a message queue (12a) that is an area that stores data for each category of a name space. In the worker (20), the storage unit (22) stores a name classification table (22a) in which the category of a name space is associated with simulator-identifying information. A generation unit (21b) uses an execution result acquired by the simulator (30) and the category of a name space corresponding to the simulator (30), identified with reference to the name classification table (22a), of a destination to generate data to be transmitted to the master (10). A transmission unit (21c) transmits the generated data to the message queue (12a) corresponding to the category of a name space of the master (10).

IPC Classes  ?

• G06F 11/34 - Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation
• G06F 9/54 - Interprogram communication

Abstract

Provided is an estimation device comprising a control unit that: reads information from a storage unit in which are stored a set of parameters and symbols used in communication, and information indicating the performance required in order to realize a prescribed communication quality in communication in which the parameters and symbols are used, the set and the information being associated with one another; and estimates a SNR required in multilevel coding (MLC) in which the parameters and symbols indicated by inputted information are used.

IPC Classes  ?

• H03M 13/01 - Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes

Abstract

The purpose of the present invention is to provide a bundled optical fiber capable of transmitting light even if power deviation occurs at a bundled portion and outputting desired power from where the bundle is split into a plurality of radiation units.　A bundled optical fiber 36 according to the present invention bundles a plurality of single-core optical fibers 51a, and is characterized in that the coupling ratios for coupling light from the outside to the single-core optical fibers 51a at one end thereof differ between at least a part of the single-core optical fibers 51a and the other single-core optical fibers 51a. In the bundled optical fiber 36, the coupling ratios are varied by changing the number of apertures or diameter of the cores 52 of the single-core optical fibers 51a.

IPC Classes  ?

• G02B 6/04 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
• G02B 6/40 - Mechanical coupling means having fibre bundle mating means

Abstract

Provided are a semiconductor optical waveguide in which the width of the waveguide can be reduced and low resistance can be obtained even while crystal defects in a core layer thereof are suppressed, and a method for manufacturing the semiconductor optical waveguide. This semiconductor optical waveguide comprises a substrate, a core layer formed on the substrate, an overcladding layer formed on the core layer, a contact layer provided on the overcladding layer, a cavity formed in the overcladding layer, a groove that is formed in the overcladding layer and the contact layer and is connected to the cavity, a first electrode connected to the substrate, and a second electrode connected to the contact layer.

IPC Classes  ?

• G02B 6/122 - Basic optical elements, e.g. light-guiding paths
• G02B 6/136 - Integrated optical circuits characterised by the manufacturing method by etching
• G02F 1/015 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction

Abstract

This analog RoF system comprises a master station device and a slave station device that performs transmission and reception of a radio signal via an antenna. The master station device generates control information that is used for controlling transmission and reception operations for the radio signal, and transmits an optical signal, which includes a first digital signal including the generated control information and an analog main signal, to the slave station device via an optical fiber. The slave station device acquires the control information from the first digital signal included in the optical signal received from the master station device via the optical fiber, and performs a process of switching between the transmission operation and the reception operation for the radio signal via the antenna, on the basis of the acquired control information.

IPC Classes  ?

• H04L 5/16 - Half-duplex systems; Simplex/duplex switching; Transmission of break signals
• H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• H04J 3/00 - Time-division multiplex systems
• H04J 3/26 - Time-division multiplex systems in which the allocation is indicated by an address in which the information and the address are simultaneously transmitted

Abstract

In this invention, a virtual machine analysis unit (121) analyzes the VM of a script engine and acquires architecture-related information relating to the script engine. An instruction set architecture analysis unit (122) acquires information on an instruction set architecture, which is a system of instructions of the virtual machine, on the basis of the architecture-related information. An instrumentation bytecode extraction unit (1231) extracts instrumentation bytecodes on the basis of the acquired architecture-related information and the information on the instruction set architecture. An insertion unit (1232) inserts the extracted instrumentation bytecodes into bytecodes subject to analysis.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

This risk calculation device constructs a plurality of first shadow models using a predetermined dataset. Then, the risk calculation device selects, from a set of sample data, pieces of sample data for which the average loss of the plurality of first shadow models is sufficiently large and the variance thereof is small. Subsequently, the risk calculation device constructs a plurality of second shadow models using the selected pieces of sample data and the dataset. Next, the risk calculation device calculates, for the pieces of sample data, a distance between the distribution of losses of the plurality of first shadow models and the distribution of losses of the plurality of second shadow models. Then, the risk calculation device selects sample data for which the distance is equal to or larger than a predetermined threshold value as sample data (target sample) to be used for calculating a privacy risk of a machine learning model.

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules
• G06N 20/00 - Machine learning

Abstract

A vulnerability detection device (10) comprises: a virtual machine analysis unit (121) that analyzes a VM of a script engine; an instruction set architecture analysis unit (122) that analyzes an instruction set architecture, which is a VM instruction system, that collects VM instructions, and that determines the instruction content of the collected VM instructions; a calculation unit (123) that, on the basis of the architecture information acquired by the virtual machine analysis unit (121) and the instruction set architecture analysis unit (122), constructs a first control flow graph indicating an overall path; and a vulnerability detection unit (124) that alters an input value, that constructs a second control flow graph indicating a path which is executed as a test and in which the altered input value input to an analysis target script, that calculates code coverage, and that, on the basis of the code coverage calculation result, selects a value to input and performs fuzzing of the analysis target script executed on the VM.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

An analysis function addition device (10) comprises a virtual machine analysis unit (121) that analyzes the VM of a script engine, an instruction set architecture analysis unit (122) that analyzes an instruction set architecture, which is a system of instructions of the VM, to collect VM instructions and determine the content of the collected VM instructions, and a calculation unit (123) that uses the architecture information acquired by the virtual machine analysis unit (121) and the instruction set architecture analysis unit (122) to construct a first control flow graph representing an entire path executed exhaustively through multipath execution, and a second control flow graph representing paths executed during execution of a test subject, and uses the first control flow graph and the second control flow graph to calculate a code coverage of a script executed on the script engine.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

A optical monitor device (10) comprises: a bend-applying unit (11) that forms a bent portion (6) in each of a plurality of optical fibers (5); and a leak light measurement device (12) that separates leak light (8), which is of propagating light (7) and is from the bent portion (6), according to the wavelength and then receives the leak light (8), the propagating light (7) having a plurality of wavelengths and propagating in each of the optical fibers (5).

IPC Classes  ?

• G01M 11/00 - Testing of optical apparatus; Testing structures by optical methods not otherwise provided for

Abstract

The present disclosure relates to technology for correcting a regular expression that is vulnerable to ReDoS attacks. The purpose of the present disclosure is to ensure that a correction result having, as a subject, a regular expression including real-world extensions is not vulnerable while minimizing memory consumption.　For the aforementioned purpose, a correction device 30 carries out an iterative deepening depth-first search to thereby correct an inputted regular expression to a form that satisfies RWS1U (prohibits the same characters from appearing consecutively) by using the regular expression, a positive example, and a negative example, and then output the corrected regular expression. It is expected that this will make it possible to support development of a program that is safe against ReDoS in more scenarios.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

An extraction unit (21) extracts, from a plurality of pieces of flow information indicating transitions of actions or states of respective users, a common page transition pattern for each of a completed flow which has reached an action or state indicating completion and a quit flow which has been quit without reaching the action or state indicating completion. A conversion unit (22) creates, from patterns of respective users, a matrix including occurrence or nonoccurrence for each of the patterns and converts, by dimensional compression, the matrix into a latent variable for each user. A creation unit (25) creates, on the basis of the latent variable for each user, a decision tree for classification between the completed flow and the quit flow. A visualization unit (29) visualizes information pertaining to classification between the completed flow and the quit flow on the basis of the decision tree.

IPC Classes  ?

• H04L 67/00 - Network arrangements or protocols for supporting network services or applications

Abstract

An extraction unit (22) extracts patterns that are collections of frequent actions or conditions, from a plurality of items of traffic flow information indicating transitions between actions or conditions for each user. An unnecessary pattern exclusion unit (23) excludes, from among the extracted patterns, a pattern or patterns in which the final action or condition of the pattern is not suitable for the purpose of an analysis. For each of the extracted patterns, a determination unit (24) determines that a pattern for which the frequency of appearance in a traffic flow DB (20) is greater than or equal to a threshold value is a pattern to be analyzed.

IPC Classes  ?

• H04L 67/1396 - Protocols specially adapted for monitoring users’ activity
• G06F 16/20 - Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
• H04L 67/02 - Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]

Abstract

This planning device comprises: a solution calculation unit that calculates, as a first solution, a solution to an integer programming problem in which an additional constraint is not used, and calculates, as a second solution, a solution to the integer programming problem in which a portion of past solutions is used as an additional constraint; and a parameter generation unit that calculates an evaluative criterion on the basis of the first solution and the second solution, and generates a parameter of an objective function of the integer programming problem on the basis of the evaluative criterion.

IPC Classes  ?

• G06Q 50/26 - Government or public services

Abstract

The present invention realizes: having a single thin-film heater mounted on an optical switch element; and a protection function. This waveguide-type optical switch circuit comprises a plurality of Mach–Zehnder interferometer-type two-input two-output optical switch elements, and forms an N-input one-output optical switch or a one-input N-output optical switch. Each of the optical switch elements includes a heater in one of two arm waveguides. For switching in which a reduction in time is required when paths are changed, an optical switch element for applying a voltage of zero to the heater during the change is not included in the path after the change.

IPC Classes  ?

• G02F 1/313 - Digital deflection devices in an optical waveguide structure

Abstract

An offload server (1) comprises: a request processing load analysis unit (120) that analyzes a request processing load for data actually being used by a user; a representative data selection unit (121) that identifies an application for which the analyzed processing load is highest, and selects representative data from among request data during use of said application; a degree of improvement calculation unit (122) that, on the basis of the selected representative data, determines a new offload pattern by executing an application code analysis unit (112), a PLD processing designation unit (113), an arithmetic strength calculation unit (114), a PLD processing pattern creation unit (115), a performance measurement unit (116), and an execution file creation unit (117), and calculates a performance improvement effect by comparing the processing time and usage frequency of the determined new offload pattern with the processing time and usage frequency of the current offload pattern; and a reconfiguration proposal unit (123) that proposes PLD reconfiguration when the performance improvement effect is a prescribed threshold or higher.

IPC Classes  ?

• G06F 9/38 - Concurrent instruction execution, e.g. pipeline, look ahead
• G06F 9/50 - Allocation of resources, e.g. of the central processing unit [CPU]

Abstract

In order to perform PtMP transmission using OAM multiplexing transmission on a backbone line and using power multiplexing transmission on a terminal line, this transmission device comprises: a processing unit that selects two or more terminals to be subjected to power multiplexing; and a transmission unit that transmits an OAM multiplexing signal through the backbone line and that transmits a power multiplexing signal through the terminal line.

IPC Classes  ?

• H04J 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

According to one embodiment of the present invention, in a pre-learning phase: parameter information is acquired, the parameter information representing the degree of effectiveness in identifying a particular person included in a first video, and being set with respect to a first feature site in an image representing the particular person; first feature information is generated, reflecting the parameter information in a feature amount extracted from the first feature site; and the first feature information is stored together with identification information for the particular person. Meanwhile, in a person recognition phase: a person image is extracted from a second video and a second feature site is detected from the person image; using a feature amount extracted from the detected second feature site as second feature information, a degree of similarity between the second feature information and the stored first feature information is derived; on the basis of the results thereof, a determination is made as to whether the person image extracted from the second video corresponds to the image representing the particular person; and the result is output.

IPC Classes  ?

• G06T 7/00 - Image analysis

Abstract

This vulnerability discovery device (10) includes: a virtual machine analyzing unit (121) that analyzes the VM of a script engine; a command set architecture analyzing unit (122) that analyzes a command set architecture that is a system of VM commands, collects the VM commands, and determines the command content of the collected VM commands; and a vulnerability discovery unit (123) that uses a mutated code to perform fuzzing on the VM on the basis of architecture information acquired by the virtual machine analyzing unit (121) and the command set architecture analyzing unit (122).

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

A virtual machine analysis unit (121) analyzes a VM of a script engine and acquires information relating to the architecture of the script engine. A symbol table detection unit (1218) detects a symbol table, which holds information relating to variables, on the basis of the acquired information relating to the architecture. A symbol table analysis unit (1219) analyzes the structure of the symbol table. An instruction set architecture analysis unit (122) acquires information pertaining to an instruction set architecture, which is the structure of virtual machine instructions, on the basis of the acquired information relating to the architecture. A VM instruction determination unit (1223) determines, using the symbol table and the information pertaining to the instruction set architecture, a virtual machine instruction that corresponds to a variable held by the symbol table.

IPC Classes  ?

• G06F 9/455 - Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
• G06F 11/36 - Preventing errors by testing or debugging of software

Abstract

This detection device (10) trains a machine learning model (typing characteristic model) so as to minimize the degree of abnormality of typing by a user himself/herself, by performing machine learning (for example, unsupervised machine learning) that uses free typing by the user himself/herself. Thereafter, the detection device (10) uses the trained machine learning model and calculates the degree of abnormality of the typing to be detected, and when the calculated degree of abnormality exceeds a predetermined threshold, the typing is determined as performed by a person other than the user himself/herself, and an abnormality is detected.

IPC Classes  ?

• G06F 21/32 - User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints

Abstract

This evaluation device calculates a privacy risk of each piece of data included in a data set used for training a machine-learning model. In addition, the evaluation device calculates a gain that a user has obtained by providing the data to the data set. For example, the evaluation device calculates how much the accuracy of the machine-learning model is improved by using the data for training. In addition, the evaluation device calculates, as an inequality degree, the difference between the gain estimated from the privacy risk of the data and a user gain obtained by providing the data, and evaluates the inequality degree of the machine-learning model by using the calculated inequality of each of the users.

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules
• G06N 20/00 - Machine learning

Abstract

In a calculation device (10), an acquisition unit (15a) acquires a dataset and target samples including a plurality of samples. A learning unit (15b) uses the dataset and at least one sample of the target samples to cause a model (f) to learn. A determination unit (15c) uses output at the time when each sample of the target samples is input to the model (f) to determine whether or not the sample was used in the learning of the model (f). A calculation unit (15d) uses a success rate of the determination to calculate a privacy risk that represents a risk of data leakage in the model (f).

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules
• G06N 20/00 - Machine learning

Abstract

In Step S101, a steel material to be evaluated is charged with hydrogen until the hydrogen storage capacity thereof is saturated (Step S102) (first process). Next, in Step S103, the steel material with saturated hydrogen storage capacity, which is used as a working electrode, a reference electrode, and a counter electrode are immersed in an electrolyte solution containing an additive that promotes penetration of hydrogen into the steel material, and a change in electric current flowing between the steel material and the counter electrode is measured when the voltage between the steel material and the reference electrode is swept (second process). Next, in Step S104, a hydrogen evolution reaction on the surface of the steel material is evaluated on the basis of the measured change in the electric current (third process).

IPC Classes  ?

• G01N 27/26 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by using electrolysis or electrophoresis

Abstract

An optical modulator according to the present invention is a Mach-Zehnder interferometer wherein a light is branched and inputted to first and second Mach-Zehnder-type modulators and wherein lights outputted by the respective ones of the first and second Mach-Zehnder-type modulators are combined to generate a QAM signal. First and second drive-signal-applied electrodes change the optical path lengths of first and second arms of the first Mach-Zehnder-type modulator in accordance with first and second drive signals, respectively, which are multivalued electric signals. Third and fourth drive-signal-applied electrodes change the optical path lengths of first and second arms of the second Mach-Zehnder-type modulator in accordance with third and fourth drive signals, respectively, which are multivalued electric signals. First to fourth drive signal generating units generate and apply the first to fourth drive signals to the first to fourth drive-signal-applied electrodes, respectively. The first to fourth drive signals are mutually independent addition signals.

IPC Classes  ?

• H04B 10/556 - Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]

Abstract

A synchronization detection device 20 is constituted by: a pseudo-vorticity matrix calculation unit 21 that receives phase time-evolution information from an oscillator system 10 including a finite number of oscillators and calculates a matrix, the elements of which are numerical values obtained by discretizing a phase difference acquired by time evolution of two oscillators; a synchronization graph generation unit 22 that generates a synchronization graph which visualizes two-point synchronization by graph representation; a partial synchronized set detection unit 23 that detects a plurality of partial sets of oscillators which partially synchronize and have no common parts in the set of the finite number of oscillators in the synchronization graph; and a synchronization index calculation unit 24 that uses a calculation result of the calculation by the pseudo-vorticity matrix calculation unit 21 and the partial synchronized sets detected by the partial synchronized set detection unit 23, so as to generate an index which characterizes the partial synchronization in the oscillator system.

IPC Classes  ?

• G06F 17/10 - Complex mathematical operations

Abstract

The purpose of the present disclosure is to make it possible to detect, even against unknown threats, whether or not unexpected communication functions such as backdoors are set in developed software.　For this purpose, the present disclosure provides a certification device 3 for certifying the safety of software, said certification device 3 comprising: an input unit 31 to which software is input; a labeling unit 33 that determines whether each variable appearing in the software is confidential information or public information, and labels variables relating to confidential information; a verification logical formula generation processing unit 35 that uses the labels formed by the labeling unit to generate a verification logical formula, indicating that "the software satisfies safety requirements if the verification logical formula can be derived using a prescribed inference rule"; a proof generation unit 37 that generates a proof of the safety of the software if the verification logical formula can be derived using the prescribed inference rule; and a transmission unit 39 that transmits the software, the verification logical formula, and the proof to a verification device that verifies the proof.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

This statistical value estimation device estimates a statistical value of data in a protected form in the sense of local difference privacy, and comprises: an input unit that receives, from each of a plurality of data processing devices, processed data items which are values selected from a limited number of values, for each of two or more data items; and a calculation unit that uses the processed data items received from the plurality of data processing devices to estimate at least one statistical value for the data.

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules
• G06F 17/18 - Complex mathematical operations for evaluating statistical data

Abstract

One aspect of the present invention relates to an information collection system including a plurality of communication devices and an information collection server that collects information regarding the communication devices, wherein the communication device includes a detection unit that detects acquisition of information regarding the communication device, and an information transmitting unit that, when the detection unit detects that the information about the communication device has been acquired, transmits to the information collection server or a predetermined device that the information about the communication device has been acquired, and the information collection server includes an information receiving unit that receives information regarding the communication device transmitted from the communication device or the predetermined device, a location information acquisition unit that acquires location information indicating the location of the communication device to which the information regarding the communication device received by the information receiving unit has been transmitted, and a storage unit that stores information regarding the communication device and the location information.

IPC Classes  ?

• H04L 67/00 - Network arrangements or protocols for supporting network services or applications
• H04L 43/045 - Processing captured monitoring data, e.g. for logfile generation for graphical visualisation of monitoring data

Abstract

A spatial sound reconstruction device of one embodiment comprises: a video feature amount calculation unit that calculates a video feature amount on the basis of video information; a sound feature amount calculation unit that calculates a sound feature amount on the basis of sound information, which is monaural audio corresponding to the video information; and a coefficient calculation unit that calculates a high-order ambisonics coefficient on the basis of the video feature amount and the sound feature amount.

IPC Classes  ?

• H04S 5/00 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation

Abstract

This data conversion device improves operating efficiency for data conversion by comprising: an input unit configured to input tabular format data to be converted and conversion results for positive and negative examples related to a part of the tabular format data; a generation unit configured to generate one or more candidates for a program that outputs a conversion result containing the positive example but not containing the negative example when the tabular format data has been input; a searching unit configured to search for the program from the one or more candidates; and an output unit configured to output a conversion result obtained by the program with respect to the tabular format data.

IPC Classes  ?

• G06F 16/17 - File systems; File servers - Details of further file system functions

Abstract

This image restoration device comprises a mask image generation unit, a pixel restoration unit, and an image synthesis unit. The mask image generation unit generates a mask image for an unnecessary object from the input image. The pixel restoration unit first performs down-sampling processing on the input image and the mask image to generate a downsized input image and a downsized mask image by reducing the number of pixels. Next, the pixel restoration unit uses the downsized input image and the downsized mask image to perform object removal processing and pixel restoration processing on a missing region in which the object is removed and generates a downsized restoration image. Then, the pixel restoration unit performs up-sampling processing on the downsized restoration image to generate a restoration image having the same size as that of the original input image. Next, the pixel restoration unit uses the mask image and the restoration image to perform pixel restoration processing on the missing region to generate a final restoration image. The image synthesis unit synthesizes an image by using the input image and the final restoration image.

IPC Classes  ?

• G06T 5/00 - Image enhancement or restoration
• H04N 1/387 - Composing, repositioning or otherwise modifying originals

Abstract

In regard to an optical transmitter in which an optical modulator and a driver IC therefor are mounted in a single package, the present invention discloses new configurations for improving the temperature dependence of the optical modulation output characteristics and a mounting form suitable for each configuration. An optical transmitter (13) comprises an optical modulator, a driver integrated circuit (driver IC) (12) that supplies a modulating electrical signal for the optical modulator, a first Peltier element (17) that controls the temperature of the optical modulator, and a second Peltier element (16) that controls the temperature of the driver IC, wherein the optical modulator and the driver IC are wire-connected and the temperature of the second Peltier element is set lower than the temperature of the first Peltier element.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

Provided is a novel configuration and mounting embodiment for an optical transmitter that suppresses the temperature dependency of optical modulation output characteristics and that has excellent high-speed characteristics. This optical transmitter (200) includes: an optical modulator chip (203); a driver IC (202) for actuating the optical modulator chip; a wiring substrate (215) having a substantially linear high-frequency line and connecting the optical modulator chip and the driver IC, the wiring substrate being mounted face-down by flip-chip mounting; and a Peltier element (205) mounted below the optical modulator chip and the driver IC. The optical modulator chip and the driver IC are temperature-controlled by the same Peltier element.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

This optical transmitter (10) comprises a Peltier element (16), an optical modulator (13), and a driver integrated circuit (IC) (12) that supplies a modulation electrical signal for the optical modulator, wherein the optical modulator and the driver IC are mounted in a flip-chip manner while facing down toward the upper surface of the Peltier element. An optical modulator chip that includes the optical modulator, and the driver IC are mounted in a flip-chip manner on the upper surface of a subcarrier (14) disposed on the upper surface of the Peltier element. The subcarrier is formed using aluminum nitride (AlN), the optical modulator chip is formed using InP, and an underfill material (17) having a thermal conductivity of 3 W/(mk) or more is filled in a gap between the subcarrier and the optical modulator chip and the driver IC. The temperature of the Peltier element is controlled at 25°C to 50°C inclusive.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

This disclosure relates to a propagation environment reproduction device that reproduces a propagation environment for verifying the communication performance and the like of an object of measurement. The device comprises: an electromagnetic anechoic chamber 10 that blocks electromagnetic waves from the outside; reconfigurable intelligent surfaces (RISs) 16 installed in the electromagnetic anechoic chamber 10; an RIS control device 22 that provides control signals to the RISs 16; transmitting antennas 20 installed in the electromagnetic anechoic chamber 10; a channel emulator 24 that controls the characteristics of electromagnetic waves transmitted from the transmitting antennas 20; and a control server 26 that controls the RIS control device 22 and the channel emulator 24. The RISs 16 are reflective plates having the characteristic of changing the reflection pattern in response to the control signals.

IPC Classes  ?

• H04B 17/309 - Measuring or estimating channel quality parameters

Abstract

A route search device according to one aspect of the present invention uses a solver to search for a travel route of a vehicle traveling to a plurality of points providing services to a user. This route search device includes an acquisition unit, a planning problem formulation unit, and an input/output unit. The acquisition unit acquires network topology of a network having the plurality of points as nodes, the number of users in each point, and a travel time matrix between the points. The planning problem formulation unit formulates a planning problem in which the degree of impact on a user is included in a limiting condition, on the basis of the network topology, the number of users, and the travel time matrix. The input/output unit outputs a solution that is obtained as a result of transmitting the formulated planning problem to the solver.

IPC Classes  ?

• G06Q 10/047 - Optimisation of routes or paths, e.g. travelling salesman problem

Abstract

The purpose of the present invention is to provide an optical fiber bundle that increases the coupling efficiency of light from a light source, that enables spatial division multiplexing transmission, and that can be manufactured through simple steps.　This optical fiber bundle (301) is a bundle of a plurality of single-core resin-clad optical fibers (30), Each of which has a configuration in which the outer circumference of a glass core (11) is covered by a resin cladding (15) with a lower refractive index than the glass core (11). Only the glass core (11) is heated and then drawn out. After drawing out the glass core (11), the resin cladding (15) is applied to the outer circumference of the glass core, thereby forming a single-core resin-clad optical fiber (30). The optical fiber bundle (301) is formed by bundling a plurality of the single-core resin-clad optical fibers (30).

IPC Classes  ?

• G02B 6/04 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
• G02B 6/02 - Optical fibres with cladding
• G02B 6/42 - Coupling light guides with opto-electronic elements

Abstract

The beamformer (10) for directing an incident electromagnetic wave, comprising a first conductive metamaterial cell (11A) configured to shift a phase of a first portion of the electromagnetic wave, a second conductive metamaterial cell (11B) located next to the first conductive metamaterial cell, having a different geometry than the first conductive metamaterial cell, and configured to shift a phase of a second portion of the electromagnetic wave and a conductor (13) including at least a portion disposed between the first conductive metamaterial cell and the second conductive metamaterial cell. According to the above configuration, the disturbance of the capacitance between adjacent metamaterial cells of different geometry (including size) is reduced, thereby reducing sidelobes.

IPC Classes  ?

• H01Q 15/14 - Reflecting surfaces; Equivalent structures

Abstract

This server device comprises: a transmission unit that transmits, to a client device, a first data item in a first array having stored therein N number of data items in the initial state, and transmits, to the client device, all second data items stored in a second array which can store m number of data items, said m number being less than the N number; a migration unit that deletes the first data item transmitted by the transmission unit to the client device from the first array and stores the same in the second array; and a re-storage unit that re-stores data items stored in the second array in the first array when the number of the second data items stored in the second array has reached or exceeded m. The client device comprises a selection unit for probablistically selecting a data item from among the first data item and the second data items received from the server device. Accordingly, the space efficiency for enabling a server to conceal contents relating to data access is improved.

IPC Classes  ?

• G06F 21/60 - Protecting data

Abstract

An optical wiring unit (39A) has a plurality of optical wiring paths (51-56) that have a plurality of optical paths (41A-46H) and connect between a plurality of routes (100A-100D). The plurality of optical wiring paths (51-56) are layered in the thickness direction.

IPC Classes  ?

• G02B 6/46 - Processes or apparatus adapted for installing optical fibres or optical cables
• G02B 6/122 - Basic optical elements, e.g. light-guiding paths
• H04J 14/02 - Wavelength-division multiplex systems
• H04Q 3/52 - Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements

Abstract

A stake position change detection system according to the present disclosure comprises: a distribution-type vibration measurement device that acquires, for an optical fiber cable strung over intervals of stakes, a vibration distribution waveform represented by the distance of the optical fiber cable in the longitudinal direction and time for each of the intervals of the stakes; and an analysis processing device that calculates, from the acquired vibration distribution waveform, the propagation velocity of vibration propagating through the optical fiber cable for each of the intervals of the stakes, and determines, upon detection of a change in the propagation velocity, that the position of a stake in one of the intervals of the stakes where the change in the propagation velocity has been detected was changed.

IPC Classes  ?

• G01B 11/14 - Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures

Abstract

This task scheduler device (100, 100A) comprises: a dedicated command execution detecting unit (110) that detects the execution of a dedicated command; a dedicated command execution affected core identifying unit (120) that identifies a logical core that originates from the execution of the dedicated command, operates in a physical core that is the same as the dedicated command execution affected core, and has a reduced operating frequency; a low frequency permitted process allocation determining unit (140) that makes a determination for identifying a process that satisfies a predetermined performance requirement even when operating at a low frequency, with respect to the logical core that has the reduced operating frequency identified by the dedicated command execution affected core identifying unit (120); and a process core allocating unit (150) that allocates the process identified by the low frequency permitted process allocation determining unit (140) to the logical core that has the reduced operating frequency.

IPC Classes  ?

• G06F 9/50 - Allocation of resources, e.g. of the central processing unit [CPU]
• G06F 1/04 - Generating or distributing clock signals or signals derived directly therefrom

Abstract

A transmitter (200) is an optical transmitter comprising: an optical modulator (13); a driver integrated circuit (driver IC) (12) which supplies a modulated electrical signal for the optical modulator; a first wiring substrate (22) which connects the optical modulator and the driver IC and which is mounted face down using flip-chip mounting; a first Peltier element (17) which controls the temperature of the optical modulator; and a second Peltier element (16) which controls the temperature of the driver IC.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

Disclosed are novel features for improving temperature dependency of optical modulation output characteristics, and embodiments that conform to said features, in an optical transmitter in which an optical modulator and a driver IC thereof are integrally packaged. An optical transmitter (13) comprises an optical modulator, a driver IC (12) that supplies a modulated electrical signal for the optical modulator, a first Peltier element (18) that controls the temperature of the optical modulator, a second Peltier element (17) that controls the temperature of the driver IC, and a subcarrier (14) that includes electrical wiring between the optical modulator and the driver IC and that is mounted on the first Peltier element and the second Peltier element. A chip and the driver IC of the optical modulator is flip-chip mounted in a face-down configuration, and the temperature of the second Peltier element is set lower than the temperature of the first Peltier element.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

Provided is a novel configuration and mounting embodiment for an optical transmitter that suppresses the temperature dependency of optical modulation output characteristics and that has excellent high speed. This optical transmitter (200) includes: an optical modulator chip (203); a driver IC (202) for actuating the optical modulator chip; a wiring layer (209) that guides modulated electrical signals supplied from an external digital signal processor (DSP) to the driver IC; a gold wire line (210) that connects the driver IC to the optical modulator chip, and the wiring layer to the driver IC, through a PAD; and a Peltier element (205) mounted below the optical modulator chip and the driver IC. The optical modulator chip and the driver IC are temperature-controlled by the same Peltier element.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

Disclosed are, in an optical transmitter in which an optical modulator and a driver IC thereof are integrally mounted as a package, new configurations for reducing the temperature dependency of optical modulation output characteristics, and modes of mounting adapted to said configurations. An optical transmitter (10) comprises an optical modulator chip (13), a driver IC (12) that actuates the optical modulator chip, and a Peltier element (15), wherein the driver IC is placed on the Peltier element and only the temperature of the driver IC is controlled.

IPC Classes  ?

• G02F 1/017 - Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells

Abstract

One aspect of the present invention comprises: an authenticating step for authenticating an optical terminal; a scheme setting step for setting a communication scheme to be used between the terminal and a destination terminal to which the terminal is connected; a wavelength setting step for setting a wavelength to be used between the terminal and the destination terminal; and a path setting step for setting an optical path to be used between the terminal and the destination terminal.

IPC Classes  ?

• H04B 10/27 - Arrangements for networking

Abstract

1231231ijj (i≠j, i, j∈{1, 2, 3}) included in the three combinations CMT, in accordance with the challenge Ch value.

IPC Classes  ?

• H04L 9/32 - Arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system

Abstract

This disclosure relates to a propagation environment reproduction device that reproduces a propagation environment for verifying the communication performance and the like of an object of measurement. The device comprises: an electromagnetic anechoic chamber 10 that blocks electromagnetic waves from the outside; reconfigurable intelligent surfaces (RISs) 16, 18 installed in the electromagnetic anechoic chamber 10; an RIS control device 20 that provides control signals to the RISs 16, 18; a transmitting antenna 14 installed in the electromagnetic anechoic chamber 10; a channel emulator 22 that controls the characteristics of electromagnetic waves transmitted from the transmitting antenna 14; a receiving antenna 12 installed in the electromagnetic anechoic chamber 10 as an object of evaluation; and a control server 24 that controls the RIS control device 20 and the channel emulator 22. The RISs include a first RIS 16 which has a characteristic of changing the transmittance of electromagnetic waves in response to a control signal, and which is located between the transmitting antenna 14 and the receiving antenna 12.

IPC Classes  ?

• H04B 17/309 - Measuring or estimating channel quality parameters

Abstract

First, step S101 of this analysis method involves culturing cells on a hydrogel layer comprising a hydrogel, the swollen state of which changes according to the interaction with a substance (chemical species) to be measured (culturing step). Next, step S102 involves measuring the swollen state of the hydrogel layer on which cells are cultured (measurement step). Next, step S103 involves analyzing the substance on the basis of the measured hydrogel layer swollen state (analysis step).

IPC Classes  ?

• C12Q 1/02 - Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
• C12M 1/00 - Apparatus for enzymology or microbiology
• G01N 21/41 - Refractivity; Phase-affecting properties, e.g. optical path length

Abstract

This pick-and-place operation prediction device has an arrival point series prediction unit and an operation prediction unit. The arrival point series prediction unit predicts a future arrival point series using a prediction model produced through machine learning, the prediction model accepting, as inputs, a past arrival point series and at least one of a past skeletal coordinate series and video information pertaining to a third-party viewpoint relating to a worker performing pick-and-place work. The operation prediction unit predicts a future skeletal coordinate series of the worker using a prediction model produced through machine learning, the prediction model accepting, as inputs, the past skeletal coordinate series and the future arrival point series that is predicted by the arrival point series prediction unit.

IPC Classes  ?

• B25J 13/00 - Controls for manipulators
• A61B 5/11 - Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb

Abstract

This optical cross connect unit switches the connection of a plurality of optical fiber core wires, the optical cross connect unit including: an optical switch that is provided to each of the optical fiber core wires; optical wiring paths that each connect between one of the optical switches and another of the optical switches; and an optical switch control part that controls the driving of the optical switches so that one length of optical fiber core wire is connected to one length in the optical wiring paths.

IPC Classes  ?

• H04J 14/02 - Wavelength-division multiplex systems
• H04Q 3/52 - Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements

Abstract

A temperature measurement device provided with: a sensor unit (1) that measures the temperature of a surface of a living body and the temperature at a position away from the living body; a temperature calculation unit (2) that calculates the observed value of an internal temperature of the living body on the basis of the measurement result of the sensor unit (1); a noise estimation unit (3) that uses the internal temperature measured by a thermometer at the start of the measurement as a reference temperature, uses the reference temperature as an initial value of an internal temperature estimation value, and, on the basis of the observed value and the estimation value, calculates the magnitude of noise mixed in the observed value; an estimation error calculation unit (4) that calculates a gain for correcting the estimation value on the basis of the magnitude of noise and calculates the difference between the observed value and the estimation value as an estimation error; and an estimation value update unit (5) that updates the estimation value on the basis of the reference temperature, the gain, and the estimation error.

IPC Classes  ?

• A61B 5/01 - Measuring temperature of body parts

Abstract

The present invention includes: a node acquisition unit that acquires, from a server device, all nodes from a root node to any one leaf node of a complete binary tree in which data can be stored in nodes and all data is stored randomly in one of the leaf nodes in the initial state; a selection unit that probabilistically selects data to be accessed from each of all the nodes and removes the data from the node; a transfer unit that probabilistically transfers the data selected by the selection unit to one of the nodes from the root node to the leaf node among all the nodes, and probabilistically transfers data not selected by the selection unit to one of the nodes from the node storing the data to the leaf node; and a node reply unit that replies to the server device so that all the nodes among which data has been transferred are reflected in the complete binary tree. By including the above, the present invention improves space efficiency to enable a server to keep content related to access to data confidential.

IPC Classes  ?

• G06F 21/60 - Protecting data

Abstract

The present invention includes a substrate, a nonlinear optical waveguide (22) formed on the substrate, and a heater (3) that is formed along the propagation direction of light passing through the optical waveguide (22) and that supplies heat to the optical waveguide, the width and/or thickness of the optical waveguide (22) in a direction that intersects with the propagation direction having a nonuniform shape, and the heater (3) supplying heat to the optical waveguide (22) and thereby correcting, so as to reduce, nonuniformity in the amount of phase mismatching caused by nonuniformity in the shape of the optical waveguide (22).

IPC Classes  ?

• G02F 1/377 - Non-linear optics for second-harmonic generation in an optical waveguide structure

Abstract

Provided is a frequency reference optical transmission device that can transmit a frequency reference light in a transmission system for a transmission technology with high precision of frequency that has the configuration of a system that detects interference light of frequency reference lights in a fiber length fluctuation compensation unit. The optical interference circuit according to the present disclosure is formed using a waveguide on a substrate, and comprises a first coupler that branches light inputted from a reproduction reference light input port into A + 1 (A ≥ 1) lights, a partial reflecting circuit that reflects a portion and transmits a portion of light inputted from a reference light input/output port, one frequency synchronization detection circuit that generates a first interference light obtained by interference of the light transmitted from the partial reflecting circuit and a portion of reproduction reference light branched by the first coupler, and A transmission path length fluctuation detection circuits that generate a second interference light obtained by interference of a portion of the reproduction reference light outputted from the other side of the first coupler and light inputted from a transmission path fiber input/output port.

IPC Classes  ?

• G02F 2/00 - Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
• G02F 1/225 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure

Abstract

A node assembly 4 is composed of all nodes 2 that are connected by one edge 3 to nodes 2 other than said nodes 2, from among nodes 2 that fired within a threshold time period from a specified time as a result of information transmission efficiency w, which indicates transmission efficiency of bit information at each edge 3, being changed in accordance with the difference between firing times at nodes 2 that connect to both ends of the edge 3. ,

IPC Classes  ?

• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

According to one aspect of the present invention, a learning device comprises a control unit that trains a mathematical model to be trained on the basis of a speaker label representing a speaker, mel spectrogram information indicating a mel spectrogram of a voice uttered by the speaker, and a label F0 indicating a pattern F0 of the voice. The mathematical model comprises speaker label generation processing for generating the speaker label, label F0 generation processing for generating the label F0, encoding processing for extracting a feature amount of the mel spectrogram, and decoding processing for decoding an object to be decoded including the feature amount, thereby estimating a mel spectrogram indicated by the object to be decoded. The control unit updates the mathematical model on the basis of the results of execution of the mathematical model.

IPC Classes  ?

• G10L 21/007 - Changing voice quality, e.g. pitch or formants characterised by the process used

Abstract

An information processing device according to the present embodiment includes an analysis unit, a search unit, and a determination unit. The analysis unit analyzes a user's intentions. The search unit searches for a node corresponding to the intention analysis results, in a knowledge graph in which: a service, a service target for which the service is to be implemented, and an orchestrator relating to the operation management of the service and the service target are represented as nodes in respectively different layers; and a relationship between nodes of different layers or between nodes within the same layer is represented as an edge. The determination unit determines a service and the type and value of a resource based on the user's intentions, by referencing the knowledge graph on the basis of the corresponding node.

IPC Classes  ?

• G06F 16/28 - Databases characterised by their database models, e.g. relational or object models

Abstract

This electric discharge control device comprises: a capacitor connected in series to a storage battery; and a control circuit for controlling, on the basis of information indicating an electric discharge command and information indicating a command value with respect to a current value outputted from the storage battery, a voltage value across both ends of the capacitor such that the current value outputted from the storage battery is equal to or lower than the command value.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

This environmental map production device performs environmental map production efficiently and improves the quality an environmental map by including: a calculating unit configured to calculate evaluation values of the effectiveness of positioning solutions based on data measured, using a GNSS, by vehicles that travel in a certain area at a plurality of time periods, for each of a plurality of segments that divide the area; and a sorting unit that is configured to sort the positioning solutions to be used in the environmental map production and the positioning solutions not to be used in the environmental map production, on the basis of the evaluation values.

IPC Classes  ?

• G09B 29/00 - Maps; Plans; Charts; Diagrams, e.g. route diagrams

Abstract

A wireless communication system according to one embodiment of the present invention predicts, on the basis of a relevance degree of each user who uses a terminal, a traffic between the each terminal and each base station, selects a base station to connect on the basis of the traffic of each terminal, continuously collects the terminal position information relating to each terminal and a propagation loss information between each terminal and each base station, calculates a packet error rate of each selected base station on the basis of the collected terminal position information and propagation loss information, determines, on the basis of the calculated packet error rates, whether or not there is a terminal having a communication quality with respect to the base station less than a predetermined value, and when it is determined that there is a terminal having the communication quality less than the predetermined value, changes the base station to which the terminal is connected such that the communication quality of the connection of each terminal to the base station exceeds the predetermined value.

IPC Classes  ?

• H04W 36/30 - Reselection being triggered by specific parameters by measured or perceived connection quality data
• H04W 36/22 - Performing reselection for specific purposes for handling the traffic
• H04W 36/32 - Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Abstract

A wireless communication system according to the present disclosure includes a central station, base stations, and terminal stations configured so as to be capable of performing wireless communication among the terminal stations. The terminal stations transmit, to a base station, information concerning the radio quality and information concerning services being used. The base station performs clustering of the terminal stations according to clustering control information received from the central station. In addition, the base station transmits, to the central station, the information received from the terminal stations and information concerning the radio environment of the terminal stations. The central station learns, on the basis of the information received from the base station, clustering that meets the required radio quality depending on the services being used at the terminal stations and transmits, to the base station, information concerning the learned clustering as the clustering control information.

IPC Classes  ?

• H04W 28/00 - Network traffic management; Network resource management
• H04W 24/02 - Arrangements for optimising operational condition

Abstract

The purpose of the present disclosure is to provide a device and a method capable of acquiring, from a near-field pattern, an MFD for more accurately estimating a connection loss of each spatial mode of an optical fiber containing a core capable of propagating a plurality of the spatial modes.　A mode-field diameter acquisition device according to the present disclosure acquires, from a near-field pattern, a mode-field diameter of each spatial mode of an optical fiber containing a core capable of propagating a plurality of the spatial modes, the device being characterized by using a near-field pattern of any spatial mode and a mathematical formula based on a variational expression of a propagation constant for said spatial mode and comprising a mode-field diameter acquisition unit that acquires the mode-field diameter of said spatial mode.

IPC Classes  ?

• G01M 11/02 - Testing optical properties

Abstract

This optical communication device comprises: a first optical multiplexing/demultiplexing unit that branches and outputs a control signal and main signal light transmitted at different wavelengths from at least one subscriber device that is newly connected; an optical distribution unit that has a plurality of first ports and a plurality of second ports, and that inputs at least the main signal light branched at the first optical multiplexing/demultiplexing unit from one first port of the plurality of first ports, and performs output thereof from one second port of the plurality of second ports; a detecting unit that is provided inside or outside of the optical distribution unit and detects the main signal light; a subscriber device management control unit that recognizes the port of the optical distribution unit to which the at least one subscriber device that is newly connected is connected, on the basis of the main signal light detected by the detecting unit; and an optical distribution control unit that controls connection between ports of the optical distribution unit, such that the main signal light transmitted from the at least one subscriber device that is newly connected is transferred to a subscriber device that is a communicating party.　

IPC Classes  ?

• H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form

Abstract

A test piece according to an embodiment of the present invention comprises a structural body (101) formed from a metal to be measured and a simulated narrow structure (102) placed in contact with the surface of the structural body (101). The simulated narrow structure (102) can be placed to cover a surface to be measured of the structural body (101), for example. The simulated narrow structure (102) is formed from a plurality of particles (103), with gaps provided as narrow sections between adjacent particles (103). The particles (103) are globular (spherical). Also, the simulated narrow structure (102) is an aggregation of the plurality of particles (103) with the closest packing density.

IPC Classes  ?

• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light

Abstract

A generation device according to the present invention comprises: an extraction unit that extracts, from specific information, at least one piece of content information indicating content of the specific information; and a conversion unit that uses a conversion model to generate, from dialogue context and the at least one piece of content information, a speech that matches the content of the specific information and fits the dialogue context.

IPC Classes  ?

• G06F 16/90 - Information retrieval; Database structures therefor; File system structures therefor - Details of database functions independent of the retrieved data types
• G06F 40/35 - Discourse or dialogue representation

Abstract

The present disclosure relates to a wireless communication system using a non-terrestrial network, and the purpose of the present disclosure is to efficiently use facilities of terrestrial wireless stations and aerial wireless stations, and to improve the data rate of wireless communications in an NTN. The wireless communication system of the present disclosure comprises: a plurality of terrestrial wireless stations; and a plurality of aerial wireless stations that wirelessly communicate on a one-to-one basis with the terrestrial wireless stations by means of feeder link lines, while moving in the sky which includes space, or moving in the sky which includes space but being stationary relative to the ground. The wireless communication system is configured to execute: a process for calculating combinations of feeder link lines for the terrestrial wireless stations and the aerial wireless stations; a process for calculating the data rate for each of the feeder link lines indicated by the combinations; a process for calculating the total value of the data rates for each combination; and a process for switching the feeder link lines to the combination that maximizes the total value.

IPC Classes  ?

• H04W 24/02 - Arrangements for optimising operational condition
• H04W 36/16 - Performing reselection for specific purposes
• H04W 84/06 - Airborne or Satellite Networks

Abstract

One aspect of the present invention provides an estimation device comprising a control unit that uses a reception signal resulting from a transmission signal that is an optical signal transmitted by a transmitter being propagated through an optical fiber to estimate a vibration position that is a position on the optical fiber where vibration has been induced by the vibration of the outside environment. The control unit executes estimation processing comprising: compensation processing including wavelength dispersion compensation processing for compensating for wavelength dispersion of the reception signal; transmission signal estimation processing for estimating the transmission signal on the basis of a result of the wavelength dispersion compensation processing; wavelength dispersion re-application processing for re-application the wavelength dispersion to a result of the compensation processing; and vibration position estimation processing for estimating the vibration position on the basis of the result of the transmission signal estimation processing and the result obtained after inverse mapping of a mapping corresponding to the vibration position and indicating changes of the transmission signal due to propagation through the optical fiber acting on the result of the wavelength dispersion re-application processing.

IPC Classes  ?

• G01H 9/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Abstract

The purpose of the present disclosure is to achieve, without installing an intra-house communication device and an uninterrupted switching device in a user building, switching of an intra-station communication device that communicates with the user building from an intra-station communication device in a relocation-source building to an intra-station communication device in a relocation-destination building.　The present disclosure provides a system for switching a relocation-source intra-station communication device connected to an intra-house communication device to a relocation-destination intra-station communication device, the system comprising a light splitting unit which connects the intra-house communication device to both of the relocation-source intra-station communication device and the relocation-destination intra-station communication device and which has a variable branching ratio, wherein when a light signal level from the light splitting unit becomes lower than a intra-house threshold value determined in advance, the intra-house communication device continuously emits light toward the light splitting unit, stops communication with the relocation-source intra-station communication device, and accumulates data for the intra-station communication device, and the relocation-destination intra-station communication device starts communication with the intra-house communication device after the light signal level from the light splitting unit becomes higher than the intra-house threshold value determined in advance.

IPC Classes  ?

• H04L 12/44 - Star or tree networks

Abstract

The present disclosure relates to a wireless communication system pertaining to adaptive modulation technology for changing a wireless signal modulation scheme according to the communication quality of wireless communication. The purpose of the disclosure is to provide a wireless communication system in which a transmission waveform of a wireless signal is not accompanied by non-linear distortion degradation of an amplifier, even if the wireless signal is transmitted by a wireless terminal far from a wireless base station. In the wireless communication system of the present disclosure, an MCS index includes a single carrier modulation scheme as a secondary modulation scheme. A transmitter is configured so as to execute: a process for selecting one from among MCS indices, by comparing reception quality reported from a receiver and required reception quality prescribed for each MCS index; a process for modulating and encoding a transmission signal; and a process for transmitting the transmission signal to the receiver. The receiver is configured so as to execute: a process for calculating reception quality on the basis of an average transmission power reported from the transmitter and a non-linear distortion degradation amount; and a process for transmitting the reception quality to the transmitter.

IPC Classes  ?

• H04W 28/18 - Negotiating wireless communication parameters

Abstract

A wireless communication system according to an embodiment of the present invention collects, via a plurality of base stations, terminal position information indicating the position of each of terminals, power intensity information indicating the intensity of power received from each of the terminals, and state-of-charge information indicating the state of charge of a power storage battery of each of the terminals, calculates, on the basis of the collected terminal position information, the collected power intensity information and the collected state-of-charge information, a power to be allocated to each of the terminals of the base stations, calculates, on the basis of the calculated power to be allocated, a parameter that optimizes power utilization efficiency and band allocation to each of the terminals of the base stations so that while the power utilization efficiency of the entire system is increased, the power consumption is minimized, and controls the utilization efficiency of the transmission power of an RF signal that is to be transmitted, according to the calculated parameter, to each of the terminals from the base stations.

IPC Classes  ?

• H04W 52/00 - Power management
• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H04W 16/28 - Cell structures using beam steering
• H04W 64/00 - Locating users or terminals for network management purposes, e.g. mobility management
• H04W 72/0457 - Variable allocation of band or rate

Abstract

This disclosure relates to a radio communication system, a radio communication method, a radio communication control device, and a radio communication program. This radio communication system comprises a plurality of base stations, a terminal, and a toll center. The terminal is configured to perform a process of calculating required radio quality. The base stations are configured to perform a first calculation process of calculating power consumption caused by radio waves to be transmitted, a second calculation process of calculating power consumption caused by an analog circuit, and a third calculation process of calculating power consumption caused by digital signal processing. The toll station is configured to perform: a selection process of selecting candidates for the combination of an accommodation base station and a communication scheme; a fourth calculation process of calculating, for each of the candidates for the combination, the total power consumption of the entirety of a network from the results of the first, second, and third calculation processes; a recording process of recording the result of the fourth calculation process for every candidate for the combination; a selection process of selecting a combination that achieves the lowest power consumption for the entirety of the network according to the result of the recording process; and a process of performing radio communication using the selected combination.

IPC Classes  ?

• H04W 52/02 - Power saving arrangements
• H04W 24/02 - Arrangements for optimising operational condition
• H04W 28/18 - Negotiating wireless communication parameters

Abstract

An analysis device (10): creates a correspondence table on the basis of an argument, which is a value output by executing a known operation included in the same program as or a similar program to an analysis target program, an identifier of the known operation, and an intermediate code variable ID for identifying an intermediate code variable that holds the same value as the argument; acquires the intermediate code variable ID corresponding to a predetermined operation executed by the analysis target program; reads the argument identified by the intermediate code variable ID on the basis of the correspondence table; and uses the argument read by a read unit (133) to extract information in any one of or both of a register of a virtual CPU on which the analysis target program operates and a memory.

IPC Classes  ?

• G06F 9/455 - Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines

Abstract

This disclosure relates to a propagation environment estimation method, a propagation environment estimating system, and a propagation environment estimating device suitable for radio signal environment estimation using a scale model. The propagation environment estimating method of the present disclosure uses a scale model to estimate a propagation environment of radio waves. The method includes: a model creating step for creating a scale model; a light source installing step for installing, in the scale model, a laser emitting device provided with a directional light emitting element likened to a radio wave transmitting station; a receiving marker installing step for installing, in the scale model, a receiving marker likened to a radio wave receiving station; a scanning step for scanning the inside of the scale model by using the laser emitting device; an imaging step for imaging, by using a camera, a path of light of when the light is emitted to the receiving marker; and an estimating step for estimating propagation information of the path from the image captured by the camera. The laser emitting device can change, as desired, the direction of the light emitted by the directional light emitting element.

IPC Classes  ?

• H04W 16/18 - Network planning tools

Abstract

This marker is for imaging using a thermal camera and is formed from a thermally conductive material. The surface of the marker comprises a pattern formed by a first surface region SA1 and a second surface region SA2, wherein the emissivity of the second surface region SA2 is higher than the emissivity of the first surface region SA1.

IPC Classes  ?

• G01J 5/48 - Thermography; Techniques using wholly visual means

Abstract

The objective of the present disclosure is to enable measurement of strain or a temperature over an analysis section of any length without being limited by the maximum time variation of the phase to be measured.　The present disclosure is an analysis device that analyzes a distribution waveform of a beat signal obtained by combining backscattered light from an optical fiber with local light, the backscattered light being obtained by causing probe light, which is of probe light and the local light obtained by splitting frequency-swept light, incident to the optical fiber, wherein the analysis device calculates frequency offsets at two different points of the optical fiber using a cross-correlation between backscattered light waveforms obtained from the beat signal measured at different times and calculates a difference in frequency offset at the two different points to thereby measure the strain or a temperature in an analysis section connecting the two different points.

IPC Classes  ?

• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
• G01H 9/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

Abstract

An analysis device (10) includes a scenario description unit (131), an execution control unit (132), and an analysis unit (133). The scenario description unit (131) describes a test scenario to be executed by a browser. The execution control unit (132) causes the scenario to be executed by the browsers of a plurality of terminal devices. The analysis unit (133) analyzes the execution results of the scenario executed by the browsers of the plurality of terminal devices.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

A determination device (10) includes a scenario creation unit (131), an execution control unit (132), and a determination unit (134). The scenario creation unit (131) creates a scenario for a test that includes access to a web page that requests, via a browser, authorization to acquire data from equipment provided in a device that executes the browser. The execution control unit (132) causes the browser of an execution device (20) to execute the scenario. The determination unit (134) determines whether or not the web page or browser is vulnerable on the basis of the result of executing the scenario.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities

Abstract

The present disclosure relates to a propagation environment fabricating device, a propagation environment fabricating method, and a propagation environment estimation system suitable for utilizing a scale model to estimate an environment of a radio signal. The propagation environment fabricating device of the present disclosure comprises a block group, a computer, and a raising and lowering mechanism. The block group is formed from a plurality of blocks having an arbitrarily defined reflection coefficient with respect to electromagnetic waves. The computer is configured to implement 3D model creation processing for creating a 3D model of a target environment to be reproduced, and setting processing for setting a height of each block on the basis of the 3D model. The raising and lowering mechanism is configured to implement modification processing for modifying the height of each block on the basis of the setting processing.

IPC Classes  ?

• G01R 29/08 - Measuring electromagnetic field characteristics

Abstract

A storage unit (14) stores domain knowledge (14a) representing information on a prescribed domain to which a topic belongs, and a state transition diagram (14c) representing the transition of a prescribed state independent of the domain to which the topic belongs. An acquisition unit (15a) acquires text representing speech made by a user. A specification unit (15c) uses information included in the acquired text, the domain knowledge (14a), and the state transition diagram (14c) so as to specify dialog states that include the current state of the dialog with the user and the state of a transition destination. A generation unit (15d) generates speech in accordance with the specified state of the transition destination.

IPC Classes  ?

• G06F 16/90 - Information retrieval; Database structures therefor; File system structures therefor - Details of database functions independent of the retrieved data types

Abstract

A processing unit (10) uses, as first learning data, a personal characteristic of a user A, a reliability index indicating reliability held by the user A toward another person, a first recognition result, and an estimation result of an intention and/or an action of the user A based on the first recognition result to cause a first model to learn a first relationship between the first recognition result and the intention and/or the action of the user A when the user A performs a task in cooperation with an object of another user. The first recognition result relates to an appearance, gesture, expression, vocal tone, emotion, and/or language information relating to the user A recognized on the basis of an image and voice of the user A and/or a text created by the user A for first data that is an image and voice of the object of the other user who is a cooperation target of the user A and/or a text created by the object of the other user.

IPC Classes  ?

• G06N 20/00 - Machine learning

Abstract

In one embodiment of this invention, when a transmission device transmits main information and additional information associated with the main information to a reception device, the transmission device first transmits the additional information in bulk to the reception device, generates transmission summary information relating to the additional information on the basis of the additional information, and transmits the main information to the reception device together with the transmission summary information associated with the transmitted additional information. Meanwhile, the reception device receives and stores the additional information transmitted from the transmission device, generates reception summary information on the basis of the received additional information, and stores the generated reception summary information into a storage unit in association with the additional information from which the reception summary information has been generated. The reception device then receives the main information and transmission summary information transmitted from the transmission device, reads, from the storage unit, the additional information associated with the same reception summary information as the received transmission summary information, and displays the read additional information on a display unit instead of the transmission summary information.

IPC Classes  ?

• G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations

Abstract

The purpose of the present disclosure is to reduce a storage usage amount, network communications, and costs such as participant incentives, while ensuring the security of proof of existence (time stamp).　To achieve this purpose, provided is an information processing terminal that implements an electronic signature according to a proof of existence, wherein each participant of the electronic signature individually generates a random number, and a participation management unit is provided that participates as an information processing terminal related to a signer if the random number is less than a threshold value.

IPC Classes  ?

• H04L 9/32 - Arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system
• G06F 21/64 - Protecting data integrity, e.g. using checksums, certificates or signatures

Abstract

One embodiment of the present invention comprises: a sleep control unit that switches the operation mode of an optical signal transmission/reception unit between an active mode, in which optical signals can be transmitted and received, and a sleep mode, in which optical signals cannot be transmitted or received; a wakeup signal reception unit that receives a wakeup signal; and a terminal data reception unit that, after a wakeup signal is received by the wakeup signal reception unit, receives data transmitted from a prescribed terminal. If a wakeup signal is received by the wakeup signal reception unit when the operation mode is the sleep mode, the sleep control unit switches the operation mode to the active mode, and the optical signal transmission/reception unit transmits data received by the terminal data reception unit to a host device, whereupon the sleep control unit switches the operation mode to the sleep mode.

IPC Classes  ?

• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water

Abstract

An abnormality detection device according to one embodiment has: a measurement unit that measures, under set culture conditions, the culture state of a sample of a culture target that is being mass-cultured by a mass-culture device and that is fed to a microchannel chip and cultured; and a detection unit that detects abnormality of the culture state of the sample of the culture target by comparing an abnormality detection model that defines criteria for abnormality of the culture state, which indicates that the culture state of the sample of the culture target is different from usual, for each of a plurality of culture conditions with the culture state measured by the measurement unit and the set culture conditions for the sample.

IPC Classes  ?

• C12M 1/34 - Measuring or testing with condition measuring or sensing means, e.g. colony counters
• G01N 37/00 - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES - Details not covered by any other group of this subclass

Abstract

The present invention provides a reception device comprising: an electric-photo conversion circuit that converts a received signal in a direction of each of rows forming a two-dimensional array into an optical signal at a unique frequency; a first scan matrix circuit that phase-weights, for first-axis scan, the optical signals obtained by optical wavelength-multiplexing; an optical frequency conversion circuit that converts the frequencies of the optical signals divided into optical frequencies so that the optical signals have the same frequency; and a second scan matrix circuit that phase-weights, for second-axis scan, the optical signals obtained by the conversion of the frequencies.

IPC Classes  ?

• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water

Abstract

The present invention provides a transmission device comprising: a plurality of frequency conversion circuits that convert analog signals obtained by modulating a plurality of baseband signals each having a bandwidth based on a baseband signal processing capability such that the analog signals include radio-frequency bands different from each other; and an OAM signal generation circuit that generates OAM signals by assigning the analog signals having been converted to include the radio-frequency bands different from each other, to different OAM modes, respectively.

IPC Classes  ?

• H04J 99/00 - Subject matter not provided for in other groups of this subclass

Abstract

One embodiment of the present invention is a communication device comprising: an optical signal sending/receiving unit that sends and receives optical signals; and a sleep control unit that switches the operation mode of the optical signal sending/receiving unit between an active mode in which optical signals can be sent and received in a range in which the average consumed power of the optical communication device is less than the supplied-power supplied to the optical communication device, and a sleep mode in which optical signals are not sent or received.

IPC Classes  ?

• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
• H04B 10/40 - Transceivers

Abstract

This optical power feeding method has: a step in which a light source transmits light for optical power feeding to an optical power feeding line connected to an optical power feeding unit; a step in which an amplifier installed midway in the route of the optical power feeding line amplifies the light transmitted from the light source; and a step in which the optical power feeding unit receives the light amplified by the amplifier, converts the light into optical power, and obtains electrical power.

IPC Classes  ?

• H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water