Abstract: A DC feeder voltage computing device includes a model information storing unit, a run history information storing unit, and a voltage setting value computing unit. The model information storing unit stores model information. The run history information storing unit stores, on a per train basis, run history information that indicates locations and power situations of a plurality of trains that run in a DC-electrified section on or before a preceding day. The voltage setting value computing unit computes, on the basis of the model information and the run history information, a voltage setting value for controlling a substation voltage to cause an amount of power consumption in the DC-electrified section to satisfy a preset condition.

Abstract: In order to reduce the effect on a compressor caused by foaming in an oil tank, a control unit for controlling an oil pump starts the oil pump before a compressor is started (SA1), starts the compressor (SA4) when an oil supply differential pressure P satisfies a compressor startup condition during a reference time Tas from the starting of the oil pump (“Yes” in SA3), and extends the operation of the oil pump for a prescribed time without starting the compressor (Step SA5) when the compressor startup condition is not satisfied (“No” in SA3).

Abstract: To provide a resin composition having excellent resin properties. Provided is a resin composition including: at least one thermoplastic resin (A); and a hydroxyl fatty acid ester (B) that are at least blended, in which when the weight-average molecular weight of the at least one thermoplastic resin (A) in terms of polystyrene is set to MW0 and the weight-average molecular weight of at least one thermoplastic resin (C) which has been produced after the blending in terms of polystyrene is set to MW1, the MW1 is decreased by 5 or more from the MW0.

Abstract: A tire and rim assembly includes a rim having a pair of flanges, and a pneumatic tire being mounted onto the rim, the pneumatic tire including a pair of bead portions and a rim guard being provided on at least one of the pair of bead portions. In a cross-sectional view of the assembly under a standard state, the rim guard protrudes outwardly in a tire axial direction from a sidewall reference outer surface of the tire so as to cover over one of the pair of flanges. An angle ? of an imaginary rim guard straight line with respect to a tire radial direction is equal to or less than 40 degrees, and a maximum gap (A) in the tire radial direction between the one of the pair of flanges and the rim guard is equal to or less than 2.0 mm.

Abstract: A tire capable of reducing air resistance without sacrificing ride comfort is provided. A tire 1 includes a tread portion 2 and sidewall portions 3 extending from both ends of the tread portion 2 through buttress regions 31 and maximum width positions 32 to bead portions 4. A projection portion 33 extending in a tire circumferential direction and a recess portion 34 extending in the tire circumferential direction are formed in each of the buttress regions 31. The projection portion 33 has a projection height of 0.1 to 0.3 mm from a reference surface of the buttress region 31 toward an outer side in a tire radial direction. The recess portion 34 has a recess depth of 0.1 to 0.3 mm from the reference surface toward an inner side in the tire radial direction.

Abstract: Provided is a tire provided with a mark capable of reducing the air resistance during tire rotation while maintaining good visibility. A tire is provided with a mark on a tire side portion. The mark includes a first mark located on an outer side in a tire radial direction, and a second mark located inward of the first mark in the tire radial direction. Each of the first mark and the second mark includes a recess that is recessed from a side profile surface of the tire side portion. A depth of the recess of the first mark from the side profile surface is smaller than a depth of the recess of the second mark from the side profile surface.

Abstract: An air bearing includes: a main body part having a bearing surface facing a guide surface; a flow path part provided in the main body part; an air film forming part that supplies compressed air flowing through the flow path part to the guide surface to form an air film; a negative pressure generating part that sucks air between the bearing surface and the guide surface, the negative pressure generating part being provided in the flow path part; a discharge path in communication with the flow path part; and a flow rate adjusting part that adjusts a flow rate of air flowing from the flow path part to the discharge path in accordance with a compressed air pressure corresponding to a load applied to the main body part.

Abstract: A DC feeder voltage computing device includes a model information storing unit, a run history information storing unit, and a voltage setting value computing unit. The model information storing unit stores model information. The run history information storing unit stores, on a per train basis, run history information that indicates locations and power situations of a plurality of trains that run in a DC-electrified section on or before a preceding day. The voltage setting value computing unit computes, on the basis of the model information and the run history information, a voltage setting value for controlling a substation voltage to cause an amount of power consumption in the DC-electrified section to satisfy a preset condition.

Abstract: A system includes a device and one or more information processing apparatuses. The device includes a device-information generator configured to generate device information on the device; and an analyzer determining unit configured to determine any one of the device and the one or more information processing apparatuses as an analyzer for the device information. The one determined as the analyzer includes an analysis unit configured to perform an analysis based on the device information; and a service determining unit configured to determine a service to the device based on a result of the analysis.

Abstract: In order to reduce the effect of foaming occurring in an oil tank on a compressor, an oil pump control unit (50) is applied to a turbo refrigerator comprising an oil tank that stores lubrication oil supplied to a compressor and a variable-speed oil pump that supplies the lubricating oil in the oil tank to the compressor. The oil pump control unit (50) comprises: an intake refrigerant gas amount calculation unit (52) for calculating the amount of refrigerant gas drawn into the oil pump, as an intake refrigerant gas amount; a supplied lubricating oil amount calculation unit (53) for using the intake refrigerant gas amount and a required lubricating oil amount, which is an amount of lubricating oil required by the compressor, to calculate a supplied lubricating oil amount; and a command value generation unit (54) for generating a rotation speed command value for the oil pump on the basis of the supplied lubricating oil amount.

Abstract: Provided are a turbo compressor and a centrifugal chiller comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small.

Abstract: The purpose of the present invention is to provide: a turbo compressor which is provided with an open impeller and has the minimal gap between the shroud and the impeller such that efficiency is improved and the safe operating region is enlarged; and a turbo chiller using the same. The turbo compressor is provided with an open impeller with a shroud provided on the side of a casing, and the rotary shaft is supported by a radial magnetic bearing and a magnetic thrust bearing. The turbo compressor is provided with a control unit that comprises: a load calculating means that calculates the axial thrust load generated by the pressure distribution of the compressor; and an axial support position control means that controls a gap between the impeller and the shroud to be a target gap by varying, on the basis of the axial thrust load, the axial support position of the rotary shaft due to the magnetic thrust bearing.

Abstract: The purpose of the present invention is to provide a control device which is for an extraction device, and is capable of estimating the total amount of air intrusion more accurately and optimizing the operation of the extraction device.

Abstract: In an adjustment device for a frictional force adjustment portion in a section, an inner circumferential portion of the section includes: a support hole formed from rolling bearings at both ends; a frictional force generation portion configured of a brake shoe, a coil spring, and a hexagon socket set screw and generates a frictional force against a rotary shaft inserted into the support hole; and a frictional force adjustment portion configured of the hexagon socket set screw and adjusts the frictional force in the frictional force generation portion. The adjustment member driving actuator adjusts the frictional force of the frictional force adjustment portion by rotating normally and reversely the adjustment member such that the frictional force in the frictional force generation portion of the section falls within a predetermined range.

Abstract: The present invention relates to improving precision in a gate-type moving device. The gate-type moving device includes: a base, a gate-type moving body that is placed on the base via an air layer and moves on the base in a non-contact state, and an air bearing that forms the air layer, wherein the gate-type moving body is comprised of two leg parts that stand on an upper surface of the base, a beam portion that connects the leg parts, and a beam-direction moving body that moves along the beam portion, the air bearing is provided at a rear surface of at least one of the leg parts, and comprises an air blowout port that opens toward an upper surface of the base and an air suction port that opens toward the upper surface of the base, and the air suction port sucks air around the air suction port.

Abstract: Provided is an on-demand transportation management system including: a request reception means configured to receive an itinerary request of a plurality of passengers, the itinerary request including at least any one of desired departure time and desired arrival time of a shared on-demand transportation vehicle, a departure point, and a destination; and a vehicle allocation planning means configured to create a vehicle allocation plan of the on-demand transportation vehicle by classifying the plurality of passengers according to a predetermined condition that the itinerary request is received before predetermined time and the desired arrival time or the desired departure time is within a predetermined period of time. A limited number of on-demand transportation vehicles can be efficiently operated, and at the same time, a vehicle allocation plan receiving use requests of a larger number of passengers can be created.

Abstract: The present invention includes a hunting determination unit configured to determine whether hunting has occurred or not for each of control devices in a power transmission and distribution system based on a control history of the control devices, a time constant calculation unit configured to calculate an adjustment time constant in which a time constant of the control device having state information indicating a state of the control device, with a high significance level, is increased, when the hunting determination unit determines that the hunting has occurred in one or more of the control devices, and a time constant transmission unit configured to transmit the adjustment time constant to the control device.

Abstract: A centrifugal chiller includes a first expansion unit (23) that expands refrigerant that has been compressed and condensed, and an evaporation unit (41) that evaporates the expanded refrigerant and supplies the evaporated refrigerant to a compression unit (15). The first expansion unit (23) has an orifice (20) through which refrigerant condensed by a condensation unit (17) passes, and a flow rate regulation valve (22) that can regulate the amount of refrigerant condensed by the condensation unit (17) flowing through and that is connected in parallel with the orifice (20).

Abstract: A slide caliper of this disclosure includes: a fine adjustment measurement part including: a finger-press type rotation part; and a supporter, wherein the finger-press type rotation part includes: a roller part including two disks; and a roller shaft part, wherein at least a portion of inner surfaces of the two disks and the main scale come into contact with each other by frictional force, wherein the roller bearing part includes: an inclined surface along which the roller shaft part is movable when the measuring force is applied; and a stopper disposed at a position where the stopper and the roller shaft part come into contact with each other, and when the measuring force is applied, the frictional force with respect to the roller part is reduced as the roller shaft part moves along the inclined surface while contacting with the stopper to limit the measuring force.

Abstract: An air bearing includes: a main body part having a bearing surface facing a guide surface; a flow path part provided in the main body part; an air film forming part that supplies compressed air flowing through the flow path part to the guide surface to form an air film; a negative pressure generating part that sucks air between the bearing surface and the guide surface, the negative pressure generating part being provided in the flow path part; a discharge path in communication with the flow path part; and a flow rate adjusting part that adjusts a flow rate of air flowing from the flow path part to the discharge path in accordance with a compressed air pressure corresponding to a load applied to the main body part.