Abstract: An electrical circuit for reducing electromagnetic noise or interference in a power converter. The circuit includes at least one shunt capacitor arranged to connect with a grounded component of the power converter, wherein the at least one shunt capacitor is further arranged to be driven by an active control signal so as to sink a noise current originating from a noise source to the grounded component of the power converter, wherein the noise source is connected to the grounded component via a capacitive path formed by at least one stray capacitors.

Abstract: An unmanned aerial vehicle (UAV) task cooperation method based on an overlapping coalition formation (OCF) game includes: constructing a sequential OCF game model for a UAV multi-task cooperation problem; using a bilateral mutual benefit transfer (BMBT) order that is biased toward the utility of a whole coalition to evaluate a preference of a UAV for a coalitional structure; optimizing task resource allocation of the UAV under an overlapping coalitional structure by using a preference gravity-guided Tabu Search algorithm to form a stable coalitional structure; and optimizing a transmission strategy based on the current coalitional structure, an updated status of a task resource allocation scheme of the UAV, and a current fading environment, so as to maximize task execution utility of a UAV network. The method quantifies characteristics of resource properties of the UAV and a task, and optimizes the task resource allocation of the UAV under the overlapping coalitional structure.

Abstract: An unmanned aerial vehicle (UAV) task cooperation method based on an overlapping coalition formation (OCF) game includes: constructing a sequential OCF game model for a UAV multi-task cooperation problem; using a bilateral mutual benefit transfer (BMBT) order that is biased toward the utility of a whole coalition to evaluate a preference of a UAV for a coalitional structure; optimizing task resource allocation of the UAV under an overlapping coalitional structure by using a preference gravity-guided Tabu Search algorithm to form a stable coalitional structure; and optimizing a transmission strategy based on the current coalitional structure, an updated status of a task resource allocation scheme of the UAV, and a current fading environment, so as to maximize task execution utility of a UAV network. The method quantifies characteristics of resource properties of the UAV and a task, and optimizes the task resource allocation of the UAV under the overlapping coalitional structure.

Abstract: An electrical circuit for reducing electromagnetic noise or interference in a power converter. The circuit includes at least one shunt capacitor arranged to connect with a grounded component of the power converter, wherein the at least one shunt capacitor is further arranged to be driven by an active control signal so as to sink a noise current originating from a noise source to the grounded component of the power converter, wherein the noise source is connected to the grounded component via a capacitive path formed by at least one stray capacitors.

Abstract: The present invention discloses a UV curing apparatus for a 3D printing product, including a base. A tray is disposed above the base. The tray is horizontally and rotatably connected around a vertical rotating shaft on the base. A hood concentric with the tray is disposed on the base. The tray is located in the hood, and UV light tubes are arranged on an inner wall of the hood. The tray provides a driving force by means of a driving motor. The driving motor is fixed in the base. As can be seen from the foregoing structure, according to the UV curing apparatus for a 3D printing product in the present invention, a UV curing apparatus applicable to a 3D product is provided, and the surface of the 3D product can be automatically and uniformly subjected to UV curing.

Abstract: Connecting rod ultrasonic-assisted splitting machining method and a machining device thereof, relating to the field of machining of a connecting rod. The machining device comprises a rack, a fixing block, a sliding block, a sliding block base, a vertical locking oil cylinder, a wedge-shaped pull rod, an adjusting block body, etc. By means of the method and the device thereof, the range of the material used for splitting the connecting rod is enlarged, the splitting force required during the splitting of the connecting rod, deformation of fracture surfaces, residues generated during the splitting process, out-of-roundness of big end holes of the connecting rod, and other situations are reduced, and the engaging accuracy of the connecting rod and the joint face of a connecting rod cover and the assembly quality of the connecting rod are improved.

Abstract: A circuit arrangement for filtering an electric current, wherein the circuit arrangement is arranged between a power source providing the electric current and a load; and the electric current includes a first current component and a second current component. The circuit arrangement includes a first circuit arranged to receive and filter the first current component, a current control device arranged to receive and regulate the second current component so as to provide a regulated current to the load, and a control circuit arranged to provide a control signal to the current control device so as to control regulation of the second current component. The control circuit is further arranged to detect one or more operation parameters associated with the current control device, and to determine the control signal based on the one or more detected operation parameters.

Abstract: The present invention discloses a UV curing apparatus for a 3D printing product, including a base. A tray is disposed above the base. The tray is horizontally and rotatably connected around a vertical rotating shaft on the base. A hood concentric with the tray is disposed on the base. The tray is located in the hood, and UV light tubes are arranged on an inner wall of the hood. The tray provides a driving force by means of a driving motor. The driving motor is fixed in the base. As can be seen from the foregoing structure, according to the UV curing apparatus for a 3D printing product in the present invention, a UV curing apparatus applicable to a 3D product is provided, and the surface of the 3D product can be automatically and uniformly subjected to UV curing.

Abstract: Connecting rod ultrasonic-assisted splitting machining method and a machining device thereof, relating to the field of machining of a connecting rod. The machining device comprises a rack, a fixing block, a sliding block, a sliding block base, a vertical locking oil cylinder, a wedge-shaped pull rod, an adjusting block body, etc. By means of the method and the device thereof, the range of the material used for splitting the connecting rod is enlarged, the splitting force required during the splitting of the connecting rod, deformation of fracture surfaces, residues generated during the splitting process, out-of-roundness of big end holes of the connecting rod, and other situations are reduced, and the engaging accuracy of the connecting rod and the joint face of a connecting rod cover and the assembly quality of the connecting rod are improved.

Abstract: The present invention provides structural details of a thiazolopyrimidinone compound, a preparation method thereof, and use thereof in the manufacture of a medicament for the treatment of central nervous system diseases.

Abstract: A power source device of an electric tool includes: a power source module, including a short circuit protection circuit, a filter circuit, a start circuit and a rectifier filter circuit, wherein the power source module converts an inputted AC (alternating current) into a high voltage DC (direct current) through the short circuit protection circuit, the filter circuit, the start circuit and the rectifier filter circuit; a driving module, including an H bridge circuit, a control circuit, a protection circuit and a control power source, wherein the driving module divides the high voltage DC into a first DC and a second DC; and a power cable, respectively connected to the power source module and the driving module, for sending the high voltage DC from the power source module to the driving module.

Abstract: A magnetic circuit of a BLDC motor includes a stator iron core, a rotor iron core, permanent magnets and a magneto-sensitive sensor. The permanent magnets are longer than the rotor iron core; the magneto-sensitive sensor is provided at a protrusion of the rotor iron core and far away from an impact of a magnetic field of a stator; a magnetic screening slot and a positioning convex portion are respectively provided at each end of said permanent magnet slot; the magneto-sensitive sensor senses a magnetic field of two ends of each permanent magnet, rather than a combined magnetic field of the rotor iron core and each permanent magnet, so as to effectively reduce Hall signal jitters caused by irregular and unclear boundaries between two magnetic poles on a surface of the rotor. A permanent magnet embedded rotor thereof is also disclosed.

Abstract: A circuit arrangement for use in a power conversion stage and a method of controlling a power conversion stage includes at least two electronic devices connected in series, the at least two electronic devices including at least one active power electronic device operable in a plurality of operation states including an active linearly operated state; wherein the at least one active power electronic device is arranged to be controlled and to operate in the plurality of operation states in each of a plurality conversion cycles, such that a generation of electric harmonics in the power conversion stage is suppressed during an operation of the power conversion stage.

Abstract: A circuit arrangement for use in a power conversion stage and a method of controlling a power conversion stage includes at least two electronic devices connected in series, the at least two electronic devices including at least one active power electronic device operable in a plurality of operation states including an active linearly operated state; wherein the at least one active power electronic device is arranged to be controlled and to operate in the plurality of operation states in each of a plurality conversion cycles, such that a generation of electric harmonics in the power conversion stage is suppressed during an operation of the power conversion stage.

Abstract: The present invention provides structural details of a thiazolopyrimidinone compound, a preparation method thereof, and use thereof in the manufacture of a medicament for the treatment of central nervous system diseases.

Abstract: A circuit arrangement for filtering an electric current, wherein the circuit arrangement is arranged between a power source providing the electric current and a load; and the electric current includes a first current component and a second current component. The circuit arrangement includes a first circuit arranged to receive and filter the first current component, a current control device arranged to receive and regulate the second current component so as to provide a regulated current to the load, and a control circuit arranged to provide a control signal to the current control device so as to control regulation of the second current component. The control circuit is further arranged to detect one or more operation parameters associated with the current control device, and to determine the control signal based on the one or more detected operation parameters.

Abstract: A permanent magnet rotor includes: a rotor core, formed by laminating a plurality of rotor sheets, wherein the rotor sheets have a shaft hole drilled at a center thereof, and a plurality of permanent magnet grooves are provided on each of the rotor sheets; both ends of the permanent magnet groove have an air gap, the permanent magnet grooves are evenly distributed along circumference of each rotor sheet, and a connecting bridge is provided between each adjacent permanent magnet grooves; a plurality of permanent magnets, wherein the permanent magnets are respectively embedded in the permanent magnet grooves; and a shaft, passing through the shaft hole and mounted on the rotor core.

Abstract: A permanent magnet embedded rotor of BLDC motor, comprises: a rotor core (A), which is in a shape of cylinder and formed by stacked rotor sheets, having p pairs of permanent magnet grooves (C) which are bar-shaped and 2p heat-radiating through-holes (B); wherein the p pairs of permanent magnet grooves (C) and the 2p heat-radiating through-holes (B) are all provided inside the rotor core (A) in a direction of an center axle thereof, and evenly spaced around the center axle of the rotor core (A); each of the heat-radiating through-holes (B) is provided between two permanent magnet grooves (C); and p is an integer no less than 1; and p pairs of permanent magnets (D) which are bar-shaped, fixedly provided in the permanent magnet grooves (C), wherein each of the permanent magnets (D) has a trapezoid cross section, and p is an integer no less than 1.

Abstract: A device for inhibiting electromagnetic torque ripples of a brushless DC motor includes: a driving circuit for driving a brushless DC motor; a sensor for detecting a rotor position of the brushless DC motor and generating a corresponding rotor position signal; a driving signal generator receiving the rotor position signal and converting the rotor position signal to a driving signal; a motor efficiency improver receiving the rotor position signal and converting the rotor position signal to a commutation control signal; and a DC power source; wherein the driving circuit superimpose the driving signal and the commutation control signal for generating a fitting signal, the fitting signal is characterized by that: a control voltage before and after a commutation position is closed, and the bridge driving circuit controls an output current, in such a manner that a stator current of the motor at the commutation position is zero.

Abstract: A counter-rotating polisher includes: an enclosure, an electric motor, a polishing arrangement and a counter-rotating arrangement. The electric motor is fixed to the enclosure and includes a driving axle. The polishing arrangement includes two polishing device. The polishing devices respectively include a fixed tray and a polishing material that are fixedly connected to an outside of the fixed tray. The fixed tray is perpendicular to the driving axle. The counter-rotating arrangement includes a first driving wheel, a second driving wheel and a change-direction wheel. The first driving wheel is connected to the driving axle and driven by the driving axle. The second driving wheel is fixedly connected to the second fixed tray. The change-direction wheel is connected to the first driving wheel and the second driving wheel. The driving axle rotates the first polishing material positively. The change-direction wheel reversely transmits the rotation to the second driving wheel.