Abstract: A propulsion control device includes: a first wire connectable to a power line supplied with direct-current power or a ground line connected to a reference potential; a second wire connectable to the power line or the ground line; and a brake chopper circuit in which a first switching element to which a first diode is connected in parallel and a second switching element to which a second diode is connected in parallel are connected in series, and in the brake chopper circuit, one end of the first switching element is connected to the first wire, another end of the first switching element is connected to one end of the second switching element at a connection point, another end of the second switching element is connected to the second wire, and the connection point is connected to the first wire or the second wire via a brake resistor.

Abstract: A power conversion apparatus includes a filter capacitor, a contactor to electrically connect the filter capacitor to a power source or electrically disconnect the filter capacitor from the power source, and a failure determiner to determine whether a failure occurs in the contactor. When the contactor is kept closed during a determination period since closing of the contactor and a reduction in the voltage in the filter capacitor during the determination period is greater than or equal to a reference value, the failure determiner determines occurrence of a failure in the contactor.

Abstract: A car control device includes a driving force calculating unit that calculates driving force necessary for a train to travel; an operating number calculating unit that determines the number of M cars to be operated on the basis of the driving force; and a driving force command calculating unit that calculates driving force commands to be given to the M cars that operate depending on the number of M cars to be operated, wherein the driving force command calculating unit continuously changes the driving force commands when the number of M cars to be operated changes.

Abstract: An electric rolling stock control apparatus includes: a plurality of propulsion control devices that each control an electric motor for driving a car of a train, the electric motor being installed on the car, the train including a plurality of the cars; and a train information management device that calculates power necessary for the entire train, wherein the propulsion control devices each determine power according to a predetermined condition.

Abstract: A power conversion apparatus includes a filter capacitor, a contactor to electrically connect the filter capacitor to a power source or electrically disconnect the filter capacitor from the power source, and a failure determiner to determine whether a failure occurs in the contactor. When the contactor is kept closed during a determination period since closing of the contactor and a reduction in the voltage in the filter capacitor during the determination period is greater than or equal to a reference value, the failure determiner determines occurrence of a failure in the contactor.

Abstract: A car control device includes a driving force calculating unit that calculates driving force necessary for a train to travel; an operating number calculating unit that determines the number of M cars to be operated on the basis of the driving force; and a driving force command calculating unit that calculates driving force commands to be given to the M cars that operate depending on the number of M cars to be operated, wherein the driving force command calculating unit continuously changes the driving force commands when the number of M cars to be operated changes.

Abstract: The present invention provides a simple and inexpensive decontaminating method without producing any secondary waste due to decontamination. A method comprising steps of evaporating liquid ozone, feeding the gaseous ozone into a re-circulation line 2 in the upstream side of the re-circulation pump 3 to make ozone-rich water, circulating the ozone-rich water in the reactor-water re-circulation system, and remove radioactive materials from metallic surfaces.

Abstract: The present invention provides a simple and inexpensive decontaminating method without producing any secondary waste due to decontamination. A method comprising steps of evaporating liquid ozone, feeding the gaseous ozone into a re-circulation line 2 in the upstream side of the re-circulation pump 3 to make ozone-rich water, circulating the ozone-rich water in the reactor-water re-circulation system, and remove radioactive materials from metallic surfaces.

Abstract: A clocking converter for asynchronous data capable of performing bit synchronization processes of asynchronous data of different patterns by the same circuit, requiring virtually no change made therein, and shortening the processing time while achieving downscaling of the circuit structure.

Abstract: A direct cycle type atomic power plant provided with a means for suppressing transfer of radioactive nitrogen compounds generated by nuclear reaction in the core from the reactor water to steam, where an increase in the dose rate in the main steam system and the turbine system due to carry-over of radioactive nitrogen atom, .sup.16 N, generated in the core can be suppressed, and the radioactivity therein can be reduced.

Abstract: A lumbar supporting air bag assembly built into a seat back includes a main body consisting of a resilient sheet of synthetic resin sealed together at the side edges thereof, a port provided on the main body for introducing air into and discharging air from the main body, a plurality of partitions formed in the sheet, and longitudinally extending elongate holes or slits formed at the center of the partitions, the latter being separated from one another to define mutually communicating chambers in the air bag assembly. The opposing edges of the slits or holes separate from each other when air under pressure is introduced into the air bag, in such a manner that the holes or slits cause the chambers to be expanded in the direction of a pad.

Abstract: A clip-type electrode includes a pair of clamping plates arranged to be opened and closed relative to each other about a common shaft and having concave surfaces facing each other, an electrode member mounted on one of the clamping plates, and a spring coiled around the common shaft for biasing the ends of the clamping plates remote from the common shaft towards each other. One of the clamping plates is longer than the other. The electrode member includes a strip of resilient, electrically conductive material bent into a U-shaped cross-section thus providing a pressuring plate section for applying pressure to the limb of a patient, and a pair of engagement plates each extending upwardly from opposing edges of the pressuring plate section and having plural inwardly projecting bosses. The engagement plates clamp the longitudinal edges of the longer one of the clamping plates for attaching the electrode member to the clamping plate.