Abstract: Provided is a noise reduction method by cutting a corner of a tooth shoulder of a stator of an AC traction motor based on an inscribed arc. Taking a vertex of a corner of the tooth shoulder of the stator as an end point, two points are selected along two sides of the corner of the tooth shoulder of the stator to allow distances from the two points to the end point to be equal. The two points are determined as tangent points D1 and D2 of the inscribed arc. The tangent points D1 and D2 define the inscribed arc along which the corner of the tooth shoulder is cut off.

Abstract: A PMSM demagnetization fault diagnosis method based on fuzzy intelligent learning of torque signals, which includes the following steps of: acquiring torque ripple signals of permanent magnet synchronous motors under different demagnetization faults; calculating a fuzzy membership of the torque ripple signals; decomposing and reconstructing the torque ripple signals by using wavelet packet decomposition to obtain wavelet packet coefficients; calculating the energy of the wavelet packet coefficients, constructing a feature vector sample set with the fuzzy membership, and dividing it into a training set and a test set; constructing Fuzzy Extreme Learning Machine (FELM), and inputting the training set into the FELM for training; inputting the test set into the trained FELM, and calculating classification accuracy.

Abstract: A sensorless control method and an apparatus for a three-phase switched reluctance motor. The sensorless control method obtains line inductances of three phases according to real-time phase inductances of the three-phase switched reluctance motor and then determines feature points of the line inductances of the three phases. A position angle of the rotor at any time in the next corresponding region is calculated according to an average rotation speed of the rotor in the region corresponding to two adjacent feature points. A control signal is output to realize a precise sensorless control for the three-phase switched reluctance motor. The control apparatus includes a microcontroller, a power conversion circuit, a drive module for the power conversion circuit, a current detection module, a voltage detection module, an input and output module and a direct current regulated power supply.

Abstract: A physical training system for pelvic floor muscle, wherein the physical training system for pelvic floor muscle is capable of providing at least one optional exercising setting to user for making the physical training system for pelvic floor muscle can guide the user to accomplish at least one exercising movement, wherein the exercising setting is selected from a group of exercising settings, wherein the group of exercising settings comprises an exercising movement setting, an exercising time setting, an exercising intensity setting, an exercising frequency setting, an exercising guidance setting, an exercising auxiliary setting and an exercising feedback setting, wherein the physical training system for pelvic floor muscle comprises a processor and a Client, wherein the processor is capable of providing at least one optional exercising setting to user, wherein the exercising settings are set to be displayed on the Client.

Abstract: A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor.

Abstract: A blade transport holder for supporting multiple blades is provided according to the present application. The blade transport holder includes a first support assembly and a second support assembly. The first support assembly includes a first support frame and a first support member rotatably arranged at the first support frame, and the first support member is configured to fix root portions of the multiple blades; the second support assembly includes a second support frame and a second support member rotatably arranged at the second support frame, the second support member faces the first support member, and the second support member is configured to fix tip portions of the multiple blades. With the blade transport holder according to the present application, multiple blades can be transported at one time by a single blade transport holder.

Abstract: Provided is a method for optimizing structured mesh generation for a thermal analysis model of a rotor bar of an AC motor. A quadrilateral is randomly added within the top surface of the thermal analysis model of the rotor bar. The polygonal top surface is divided into multiple quadrilateral areas by drawing lines from each vertex of the quadrilateral to each vertex of the top surface or two points selected randomly on each edge of the top surface, respectively. A fruit fly optimization algorithm is adopted to obtain a maximum value of the average quality of the quadrilateral areas in a division mode and corresponding coordinates of the vertices of the quadrilateral areas. The top surface is divided into multiple quadrilateral areas according to the division mode corresponding to the maximum average quality to divide the model of the rotor bar into multiple columnar models.

Abstract: A sensorless control method and an apparatus for a three-phase switched reluctance motor. The sensorless control method obtains line inductances of three phases according to real-time phase inductances of the three-phase switched reluctance motor and then determines feature points of the line inductances of the three phases. A position angle of the rotor at any time in the next corresponding region is calculated according to an average rotation speed of the rotor in the region corresponding to two adjacent feature points. A control signal is output to realize a precise sensorless control for the three-phase switched reluctance motor. The control apparatus includes a microcontroller, a power conversion circuit, a drive module for the power conversion circuit, a current detection module, a voltage detection module, an input and output module and a direct current regulated power supply.

Abstract: A rotor rotating device includes at least two rotating units; a movable end of a telescoping cylinder in each rotating unit is provided with a pin; the pin is releasably secured on a rotor. A control method for the rotor rotating device includes: dividing the at least two rotating units into two groups; first removing pins of a first group of rotating units from the rotor, and then re-securing the pins at another positions on the rotor; and after the pins of all the rotating units are re-secured, changing the state of the telescoping cylinders of all the rotating units, and driving the rotor to turn relative to a machine base. In this way, all the rotating units are sequentially unlocked, moved to a next working station, and re-locked on the rotor. A control device, and a rotor rotating system are further provided.

Abstract: A modeling method of a stator winding air gap for temperature field analysis of an AC traction motor includes: changing the width of an air gap of a stator winding equivalent model according to a set value of spacing; establishing a three-dimensional finite element model of the AC traction motor with the stator winding air gap; based on the three-dimensional finite element model of different widths of the air gap, analyzing a temperature field to obtain a temperature field distribution diagram of the AC traction motor; carrying out the numerical fitting according to data in the temperature distribution diagram to obtain a function relation between the air-gap width and the temperature of the stator winding equivalent model; and by measuring the actual temperature of a motor stator winding, calculating an optimal air-gap width corresponding to the modeling of the stator winding of the current AC traction motor.

Abstract: A ratchet wrench includes a first and a second drive members 21, 21? rotatably mounted in a first and a second heads 16, 16? extended from a first and a second ends of a handle 10. The first drive member 21 includes a square inner periphery 35 adapted to slidably retain a drive shaft 36 including a ½? drive fitting 45 and a ?? drive fitting 46, and the second drive member 21? includes a ¼? drive hexagonal bit holder 53 and ¼? drive fitting 54, for providing combined functions of ordinary ratchet wrenches for turning fasteners. A first and a second ratcheting mechanisms are mounted in the first and the second ends of the handle 10 for turning the first and the second drive members 21, 21?, by the handle 10.

Abstract: A device and method for rotating a rotor of a wind power generator and a wind power generator are provided. The device includes at least two rotating units, and each of the rotating units includes a telescopic cylinder, a mounting base configured to connect a fixed end of the telescopic cylinder to a stand of the wind power generator, and detachably connected to the stand; and a pin arranged at a movable end of the telescopic cylinder, configured to be releasably fixed to the rotor, and configured to drive the rotor to rotate relative to the stand by a stroke movement of the telescopic cylinder.

Abstract: Systems and methods for providing a searchable concept network are provided. One such system includes a concept network application, which is hosted at least partially on a server. The concept network application may include or access an indexer for indexing text corpus. The text corpus is analyzed to extract concepts, as well as significance, relevancy and relationship information between concepts. The concepts and associated significance, relevancy and relationship information are utilized to construct a concept network, which is stored in one or more indexes or databases accessible to the concept network application. One or more user computer devices are provided access to the application, which receives a query from the user, and in response, provides the user with a relevant portion of the concept network. User behavior or interaction within the concept network may be detected and utilized in providing relevant advertisement information.

Abstract: A device and method for rotating a rotor of a wind power generator and a wind power generator are provided. The device includes at least two rotating units, and each of the rotating units includes a telescopic cylinder, a mounting base configured to connect a fixed end of the telescopic cylinder to a stand of the wind power generator, and detachably connected to the stand; and a pin arranged at a movable end of the telescopic cylinder, configured to be releasably fixed to the rotor, and configured to drive the rotor to rotate relative to the stand by a stroke movement of the telescopic cylinder.

Abstract: A rotor rotating device includes at least two rotating units; a movable end of a telescoping cylinder in each rotating unit is provided with a pin; the pin is releasably secured on a rotor. A control method for the rotor rotating device includes: dividing the at least two rotating units into two groups; first removing pins of a first group of rotating units from the rotor, and then re-securing the pins at another positions on the rotor; and after the pins of all the rotating units are re-secured, changing the state of the telescoping cylinders of all the rotating units, and driving the rotor to turn relative to a machine base. In this way, all the rotating units are sequentially unlocked, moved to a next working station, and re-locked on the rotor. A control device, and a rotor rotating system are further provided.

Abstract: A software protection system includes a user terminal and a server. According to an authorization request from the user terminal as to target software, the server generates an encrypted authorization file and an executable file of the target software. When the executable file is to be run at a terminal, a determination is made as to whether the physical information of the terminal and information as to the target software are same as that in the encrypted authorization file. When the information are same, the running of the executable file is permitted. The disclosure further provides a software protection method.

Abstract: A physical training system for pelvic floor muscle, wherein the physical training system for pelvic floor muscle is capable of providing at least one optional exercising setting to user for making the physical training system for pelvic floor muscle can guide the user to accomplish at least one exercising movement, wherein the exercising setting is selected from a group of exercising settings, wherein the group of exercising settings comprises an exercising movement setting, an exercising time setting, an exercising intensity setting, an exercising frequency setting, an exercising guidance setting, an exercising auxiliary setting and an exercising feedback setting, wherein the physical training system for pelvic floor muscle comprises a processor and a Client, wherein the processor is capable of providing at least one optional exercising setting to user, wherein the exercising settings are set to be displayed on the Client.

Abstract: Embodiments of the present disclosure provide a method and apparatus for assigning lock resources to objects by obtaining a first alternative lock for the object, and determining first correlations between the object and each of one or more other objects when the first alternative lock has been assigned to the one or more other objects, wherein in response to determining that each of the first correlations is lower than a predetermined threshold, assign the first alternative lock to the object, and may maximize the possibility of parallel execution and reduce the time waiting for lock resources, thereby avoiding lock contention.

Abstract: A method for caching images in a virtual environment uses hash tables to store information about an application or window and to store updated images. Suitable areas of applications or windows are fixed relative to the window for many cases, and also include a relatively small number of possible display statuses. Hash tables are used on an agent side and a client side to track previous image updates. When an updated image is determined to be already stored in a cache, the agent side can transmit a hash identifying the image to the client side, and the client side can update the display with the cached image.