Abstract: A method for repairing a crack in an electromechanical rotor (10), including forming a plurality of slots (12) on a periphery of a core portion (11) of an electromechanical rotor (10) along an axial direction thereof; inserting coils into the slots (12), respectively; forming a plurality of wedges for maintaining the coils in the slots (12), respectively; and forming a cut hole (20) at the core portion (11) from an outer surface of the core portion (11) so as to remove at least a deeper area of a crack created at the core portion (11) at a contacting surface between the corresponding wedge and the corresponding slot (12).

Abstract: A pneumatic tire comprises main grooves 1 extending in the tire circumferential direction formed in a tread, wherein the main groove 1 has a plurality of narrow grooves 11 in its sidewalls 3, an end portion 11a of the narrow groove 11 on the tread side does not open to the tread surface and is located closest to the tread side, an end portion 11b of the narrow groove 11 on the groove bottom side does not open to the groove bottom 1b of the main groove 1 and is located closest to the groove bottom side, a length L1 of the narrow groove 11 measured in the depth direction of the main groove is 50 to 80% of a depth D of the main groove 1, the narrow groove 11 has at least one or more bend portions 21, and a length L2 of the narrow groove 11 measured along the narrow groove 11 itself is not less than 1.03 times and not more than 2 times L1.

Abstract: A wire drawing apparatus (10) is used in a final drawing process to ensure adequate initial performance of adhesion between brass-plated steel wire and rubber without a drop in productivity. At least one of the die (14z) disposed in the most downstream position, the die (14y) disposed in the second most downstream position, and the die (14x) disposed in the third most downstream position is a drawing die having a friction coefficient ? of 0.12 to 0.41 with the brass-plated steel wire. The other dies (14) are drawing dies each having a friction coefficient ? of 0.1 or below. By using these drawing dies, brass-plated steel wire (13) is drawn, and a noncrystalline portion of high lattice defect density is formed on the surface of the crystalline portion of the brass-plating layer of the brass-plated steel wire (13).

Abstract: In a method for removing a crack in an electromechanical rotor, a through-hole penetrating from a side of one of slots adjacent to each other via a rotor core portion to a side of the other slot is formed to include a crack in the rotor core portion occurring to a contact surface with a wedge, in an electromechanical rotor including a plurality of slots formed in an axial direction in an outer peripheral surface of the rotor core portion, a coil housed in the slot, a wedge inserted in an upper portion of the slot to be arranged in the axial direction and holding the coil in the slot, and the crack is removed.

Abstract: An object of the present invention is to control crack propagation, either by predicting shaft dovetail crack propagation with high accuracy, or by determining operation conditions under which the crack does not extend. The crack propagation prediction system includes an operation processing unit, an interface unit, and a memory unit. The operation processing unit includes a stress calculation unit that calculates the mean stress generated in the shaft dovetail, a factor range calculation unit that calculates the stress intensity factor range for the crack in the shaft dovetail, and a crack propagation amount calculation unit that calculates an amount of the shaft dovetail crack propagation for an arbitrary time period, from the obtained mean stress and the stress intensity factor range, an operation pattern, an operation time, and data on the crack.

Abstract: An A/D converted and inputted signal is stored in a memory. A sliding correlator sequentially reads the signal stored in the memory and despreads this signal. A despreading timing is adjusted and then the candidate for a despreading code is outputted from a code generation circuit. The despreading code outputted at a predetermined timing is used for obtaining a correlation value of signals outputted from the memory, using the sliding correlator. Thus, by storing signals in the memory, fluctuation of a correlation value caused by fading does not occur while specifying a code or detecting a despreading timing.

Abstract: In an antenna positioning method for a communication device that performs communication using a plurality of antennas positioned on a straight line, the method has a first step of measuring radiation pattern characteristics of each antenna, a second step of detecting a direction in which fluctuation of the radiation pattern characteristics of each antenna is large, and a third step of positioning each antenna in the communication device so that the direction in which the characteristic fluctuation is large matches the straight line direction.

Abstract: There is provided a flaw detection testing method applied to a slot dovetail portion of a turbine generator rotor shaft. The flaw detection testing method includes an angle determining step of determining a slot angle of the slot dovetail portion using a variable-angle ultrasonic probe, a flaw detection performing step of, on the basis of a determination result in the angle determining step, using an angle ultrasonic probe or a phased array probe to perform flaw detection to detect a flaw in the slot dovetail portion, and a flaw depth measuring step of, when the flaw is detected in the flaw detection performing step, using an angle ultrasonic probe to measure a depth of the flaw from a surface of the slot dovetail portion.

Abstract: A rotary electric machine includes: a stator, a rotor and rotor fans contained in a closed type frame. The cooling gas is circulated in the frame by the rotor fans and warmed as a result of heat exchange with the stator and the rotor is cooled by a gas cooler. A heat pump is adapted to use cooling water or ambient air as high temperature heat source and liquid coolant as low temperature heat source. A liquid coolant circulation system for supplying liquid coolant to the heat exchange section of the gas cooler is provided. The liquid coolant is cooled by the heat pump and is supplied to the heat exchange section of the gas cooler by means of the coolant circulation system.

Abstract: The present invention relates to a method for preparing a syn-form piperidine compound represented by general formula [I]: wherein, bold lines represent bonds in which substituents at positions 2 and 4 of a piperidine ring are in the syn configuration, and the other symbols have the same meaning as defined below, or a salt thereof, comprising: reducing a compound represented by general formula [II]: wherein, ring A represents an optionally substituted benzene ring, R2 represents a hydrogen atom, an optionally substituted hydroxyl group, an optionally substituted amino group, an optionally substituted alkyl group, a substituted carbonyl group or a halogen atom, and M represents an alkaline metal or hydrogen atom.

Abstract: A wireless communication device capable of restraining dispersion of a propagation environment index and thereby improving throughput. A reception controller receives a pilot signal, measures a propagation environment and detects a phase change of the pilot signal. A moving average processor obtains a moving average of propagation environment values. An index function setter generates a propagation environment index function indicative of the correspondence between the propagation environment value and a propagation environment index which is a propagation environment quality index.

Abstract: A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils.

Abstract: A rotary electric machine includes: a stator, a rotor and rotor fans contained in a closed type frame. The cooling gas is circulated in the frame by the rotor fans and warmed as a result of heat exchange with the stator and the rotor is cooled by a gas cooler. A heat pump is adapted to use cooling water or ambient air as high temperature heat source and liquid coolant as low temperature heat source. A liquid coolant circulation system for supplying liquid coolant to the heat exchange section of the gas cooler is provided. The liquid coolant is cooled by the heat pump and is supplied to the heat exchange section of the gas cooler by means of the coolant circulation system.

Abstract: In a method for removing a crack in an electromechanical rotor, a through-hole penetrating from a side of one of slots adjacent to each other via a rotor core portion to a side of the other slot is formed to include a crack in the rotor core portion occurring to a contact surface with a wedge, in an electromechanical rotor including a plurality of slots formed in an axial direction in an outer peripheral surface of the rotor core portion, a coil housed in the slot, a wedge inserted in an upper portion of the slot to be arranged in the axial direction and holding the coil in the slot, and the crack is removed.

Abstract: By providing a interference power estimation unit obtaining the power of interference in a common pilot signal with ten symbols in one slot and outputting the power of interference as the estimate of the amount of interference in the data signal's pilot signal and a signal-to-interference power ratio calculation unit calculating a signal-to-interference power ratio (SIR) using an output of the interference power estimation unit, in a spread spectrum communication method, a correct SIR can be estimated even when the number of symbols of an individual pilot signal in the slot of the data channel is small.

Abstract: An object of the present invention is to control crack propagation, either by predicting shaft dovetail crack propagation with high accuracy, or by determining operation conditions under which the crack does not extend. The crack propagation prediction system includes an operation processing unit, an interface unit, and a memory unit. The operation processing unit includes a stress calculation unit that calculates the mean stress generated in the shaft dovetail, a factor range calculation unit that calculates the stress intensity factor range for the crack in the shaft dovetail, and a crack propagation amount calculation unit that calculates an amount of the shaft dovetail crack propagation for an arbitrary time period, from the obtained mean stress and the stress intensity factor range, an operation pattern, an operation time, and data on the crack.

Abstract: A method for removing a crack in an electromechanical rotor, including: forming a plurality of slots on a periphery of a core portion of an electromechanical rotor along an axial direction thereof; inserting coils into the slots, respectively; forming a plurality of wedges for maintaining the coils in the slots, respectively; and forming a cut hole at at least a part of the core portion from an outer surface of the core portion toward the side of a center axis thereof so as to contain a crack along a circumferential direction thereof.

Abstract: A method for repairing a crack in an electromechanical rotor (10), including forming a plurality of slots (12) on a periphery of a core portion (11) of an electromechanical rotor (10) along an axial direction thereof; inserting coils into the slots (12), respectively; forming a plurality of wedges for maintaining the coils in the slots (12), respectively; and forming a cut hole (20) at the core portion (11) from an outer surface of the core portion (11) so as to remove at least a deeper area of a crack created at the core portion (11) at a contacting surface between the corresponding wedge and the corresponding slot (12).

Abstract: Disclosed is a synchronization tracking circuit for synchronizing the phase of a despreading code sequence on a receiving side to the phase of a spreading code sequence on a transmitting side. The synchronization tracking circuit has a DLL circuit for performing synchronization tracking by DLL (Delay Locked Loop) control, and an interference-component estimation unit for estimating an interference component inflicted by another path upon a prescribed path of interest among multiple paths. The DLL circuit, which has an interference elimination unit, executes DLL control based upon a signal from which the interference component from the other path has been eliminated and causes the phase of the despreading code sequence on the receiving side to be synchronized with and track the phase of the spreading code on the transmitting side.

Abstract: A frequency synchronizing apparatus synchronizes the oscillation frequency of a receiving device to the oscillation frequency of a transmitting device. The frequency synchronizing apparatus receives, from the transmitting device, frames in which symbols having identical time profiles have been embedded, calculates a correlation value between the identical time profile portions in neighboring frames of a receive signal, obtains the phase of the correlation value (a complex number) as a frequency deviation between the transmitting device and the receiving device, and controls oscillation frequency based upon the phase.