Abstract: According to an aspect of the present invention, an optical communication device includes: a detection unit that is connected to a user device and detects light which is output from the connected user device; a connection unit that connects the user device and a control transceiver in a case where light is detected by the detection unit; an acquisition unit that acquires, via the control transceiver, communication destination information indicating a communication destination to which the user device requests connection; an assignment unit that assigns a wavelength to the user device according to the communication destination information acquired by the acquisition unit; and a notification unit that notifies the user device of wavelength information indicating the wavelength assigned by the assignment unit via the control transceiver.

Abstract: An optical communication device that communicates with another optical communication device using at least a time division multiplexing method, the optical communication device includes: a band request unit that requests a band for transmitting a management control signal used for management and control; and a transmitting unit that transmits the management control signal as a burst signal using a band assigned to be able to transmit data having a data length or more obtained based on a transmission rate of the management control signal, a transmission rate of a main signal, and a data length of the management control signal.

Abstract: An optical communication device that communicates with another optical communication device by using at least a time division multiplexing system, the optical communication device including: a management control signal division unit that divides a management control signal used for management and control; and a transmission unit that transmits the management control signal divided, by including the management control signal divided in a burst signal to be transmitted at an assigned transmission timing.

Abstract: The optical communication system includes the optical distribution device (100) provided between the wavelength routing device (30) and the optical multiplexing/demultiplexing device (40). The wavelength routing device outputs the optical signal input from the port on the wavelength variable subscriber device side to the port uniquely determined by a combination of the wavelength of the optical signal and the port to which the optical signal is inputted. The wavelength variable subscriber device can execute the first protection for switching the wavelength of the optical signal to be transmitted and received to the spare wavelength different from the operating wavelength when the wavelength variable subscriber device and the wavelength variable communication device (10) are disconnected.

Abstract: An aspect of the present disclosure is a transmission system including a modulated wave generation unit that generates an intermediate wave, which is a coherent wave in which a frequency component of either of two signals overlays a frequency spectrum, the two signals being a main signal indicating transmitted information to be transmitted and a control signal indicating management information, which is information on communication between a transmission source of the transmitted information and a communication destination of the transmission source, and a modulation unit that modulates the intermediate wave with a signal in which a frequency component does not overlay the frequency spectrum of the coherent wave generated by the modulated wave generation unit out of the two signals that are the main signal and the control signal. In the transmission system, a frequency band of the main signal and a frequency band of the control signal do not overlap each other.

Abstract: An optical communication apparatus includes an optical switch, a wavelength management control unit, and an optical switch control unit. The optical switch is connected to a plurality of transmission lines and outputs an optical signal input from one of the transmission lines to another of the transmission lines. The wavelength management control unit assigns a wavelength to a subscriber terminal according to a communication destination. The optical switch control unit controls the optical switch such that it outputs an optical signal transmitted from the subscriber terminal, to which a wavelength has been assigned, to a transmission line corresponding to its forwarding destination on a path to the communication destination.

Abstract: An OLT (2) includes one or more optical receivers (22) configured to receive optical signals of respective different wavelengths obtained by an AWG filter (4) demultiplexing a wavelength-multiplexed signal addressed to the terminal itself, and a supervisory controller (23) configured to transmit, to an ONU (3), a wavelength adjustment instruction to transit a wavelength to be used by an optical transmitter (32) for transmission of an optical signal, to set a difference between an optical received power of an optical signal received by any of the optical receivers (22) and a reference value of the optical received power within a threshold, the ONU (3) being a transmission source of the optical signal.

Abstract: An object is to provide an optical modulation/demodulation method, an optical communication system, an optical transmitting device, and an optical receiving device capable of inhibiting an increase in the cost and a decrease in the band at the time of multiplexing services. The optical transmitting device according to the present invention sums a plurality of binary signals that have bit rates having such relation that the bit rate of any higher speed side is twice or more integer multiples of a bit rate of any lower speed side, having smaller amplitude as the corresponding bit rate becomes higher and having matched rise and fall timings, and generates a multi-level signal, and modulates light from one light source. In other words, generating a multi-level signal as a modulation signal enables a plurality of services to be multiplexed by one transmitter.

Abstract: An OLT (2) includes one or more optical receivers (22) configured to receive optical signals of respective different wavelengths obtained by an AWG filter (4) demultiplexing a wavelength-multiplexed signal addressed to the terminal itself, and a supervisory controller (23) configured to transmit, to an ONU (3), a wavelength adjustment instruction to transit a wavelength to be used by an optical transmitter (32) for transmission of an optical signal, to set a difference between an optical received power of an optical signal received by any of the optical receivers (22) and a reference value of the optical received power within a threshold, the ONU (3) being a transmission source of the optical signal.

Abstract: An object is to provide an optical modulation/demodulation method, an optical communication system, an optical transmitting device, and an optical receiving device capable of inhibiting an increase in the cost and a decrease in the band at the time of multiplexing services. The optical transmitting device according to the present invention sums a plurality of binary signals that have bit rates having such relation that the bit rate of any higher speed side is twice or more integer multiples of a bit rate of any lower speed side, having smaller amplitude as the corresponding bit rate becomes higher and having matched rise and fall timings, and generates a multi-level signal, and modulates light from one light source. In other words, generating a multi-level signal as a modulation signal enables a plurality of services to be multiplexed by one transmitter.

Abstract: Provided is a power system that can arbitrarily set output power while stabilizing output voltages. Connection terminals 13 and 23 of lower power sources 1 and 2 are connected to external connection terminals 41 in parallel. Voltage measurement section 31 measures voltage values of external connection terminals 41 as measured voltage values. Power converters 12 and 22 measure power supply capacities of lower power sources 1 and 2, respectively. Output instruction section 32 adjusts power or currents flowing through connection terminals 13 and 23 based on the measured voltage values and the power supply capacities so that the measured voltage values are included in a predetermined voltage range.

Abstract: Provided is a power system that can arbitrarily set output power while stabilizing output voltages. Connection terminals 13 and 23 of lower power sources 1 and 2 are connected to external connection terminals 41 in parallel. Voltage measurement section 31 measures voltage values of external connection terminals 41 as measured voltage values. Power converters 12 and 22 measure power supply capacities of lower power sources 1 and 2, respectively. Output instruction section 32 adjusts power or currents flowing through connection terminals 13 and 23 based on the measured voltage values and the power supply capacities so that the measured voltage values are included in a predetermined voltage range.

Abstract: Provided is an AC power supply apparatus including a first AC power supply generation unit that generates a first AC voltage for a first terminal corresponding to a u-phase; a second AC power supply generation unit that generates a second AC voltage for a second terminal corresponding to a v-phase; a third AC power supply generation unit that generates a third AC voltage for a third terminal corresponding to a w-phase; and a control unit that controls a phase and an amplitude of each of the AC voltages output from the first to third AC power supply generation units, in such a manner that the amplitude and the phase of each of the first to third AC voltages output to the first to third terminals, respectively, match an amplitude set value and a phase set value preliminarily set for each of the AC voltages.

Abstract: A power conditioner according to an exemplary aspect of the present invention includes a first converter that converts a first DC voltage supplied from an external power supply into a second DC voltage, an inverter that converts the second DC voltage into an AC voltage and outputs the AC voltage to an external line so as to keep receiving power by the external line from a supply source system in a predetermined range, and an energy management unit that stops operations of the first converter and the inverter at predetermined time previously determined based on a magnitude of load power consumed by a load connected to the external line.

Abstract: Increasing performance companies whose business performance increases are selected among a number of companies and a growth ratio of the skill holding amount (an upskilling ratio) in each skill field is calculated. An average of the upskilling ratios of the increasing performance companies is found for each skill field. The average is used as a standard upskilling ratio. An upskilling ratio of a client company that requests an analysis in each skill field is compared with the standard upskilling ratio. This makes it clear that the skill field being important for the client company but insufficient in the skill holding amount. Then a plan to supplement the shortage can be drafted.

Abstract: A computer-readable recording medium having stored a recommended exhibition booth selection program that can determine the areas of interest of an individual user appropriately and can plan optimum booths to be visited at an exhibition. A learned-content-based interest judgment unit calculates a score indicating the degree of user's interest in each field, depending on what the user has learnt in the field. Then, an exhibition-booth-based interest judgment unit judges the field of content shown at each exhibition booth, sums up scores concerning the learning experience in the field, and calculates a score indicating the degree of user's interest in the exhibition booth. A recommended exhibition booth selection unit selects an exhibition booth having a high score with priority as a visit destination and creates a recommended exhibition booth list for the user.

Abstract: The apparatus for recommending an optimum training is provided with a standard model database which stores standard value information of standard skill corresponding to a standard talent image, and a skill/training correspondence database which stores training information corresponding to the standard value information. Furthermore, a questionnaire response section and a test response section collect skill information of a trainee in a question and answer format, via on-line. Then, a skill analysis section objectively analyzes the skill and talent image of the trainee, based on the comparison result of the standard value information and the skill information. Finally, a training selection section selects training information that suits to the trainee from the skill/training correspondence database as the optimum training recommendation information, based on the result of analysis by the skill analysis section.

Abstract: A business transaction program that enables a user to easily learn learning content he/she wants to. A transaction screen display section in a computer displays a transaction screen for conducting transaction on a terminal unit used by a user for conducting and learning the transaction in response to a request from the terminal unit. When a learning request for the transaction is made from the terminal unit, a content display section obtains learning content corresponding to the transaction on the transaction screen displayed on the terminal unit from a learning content database and displays it on the terminal unit. When a search by a keyword is performed from the terminal unit, learning content which matches the keyword may not reside in the learning content database. In this case, a content search section searches a server for such learning content via a network. The server stores various types of learning content to be provided to companies.

Abstract: A learning program whereby the degree of improvement in transaction work as a result of transaction learning can be confirmed. A work amount storage section receives an amount of transaction work which an employee has performed using a terminal, and stores the work amount in a work amount storage database (DB). In response to a request for transaction learning from the employee, a transaction learning display section displays a learning screen for the transaction learning on the terminal. A learning information storage section receives start and end times of the employee's transaction learning from the terminal, and stores the received times in a learning information storage DB.

Abstract: Increasing performance companies whose business performance increases are selected among a number of companies and a growth ratio of the skill holding amount (an upskilling ratio) in each skill field is calculated. An average of the upskilling ratios of the increasing performance companies is found for each skill field. The average is used as a standard upskilling ratio. An upskilling ratio of a client company that requests an analysis in each skill field is compared with the standard upskilling ratio. This makes it clear that the skill field being important for the client company but insufficient in the skill holding amount. Then a plan to supplement the shortage can be drafted.