Abstract: PFC device and controlling method thereof, and an electronic device are provided. The device includes: first and second input terminals configured to receive AC input signal including alternating positive and negative half-cycles; an output terminal configured to provide output signal; an inductor a first terminal of which is coupled with the first input terminal; a first bridge arm including first and second switch components whose first connection point is coupled with second terminal of the inductor; a second bridge arm including third and fourth switch components whose second connection point is coupled with the second input terminal; a first current sampling unit configured to sample falling edge of an inductor current flowing through the inductor; a switch controlling unit configured to generate switch control signal based on sampling result to control the first and second switch components to change switch status. Influence of parasitic parameters on the circuit is reduce.

Abstract: An apparatus for disassembling an electronic component from a circuit board includes a base, a controller, a positioning assembly, and a heating and suction assembly. The controller is fixed to the base. The positioning assembly is arranged on the base and coupled to the controller. The positioning assembly is configured to be controlled by the controller to position the circuit board at a first predetermined position. The heating and suction assembly is movably arranged on the base and coupled to the controller. The heating and suction assembly is moved to a second predetermined position to heat the electronic component and moved to a third predetermined position to attract and hold the heated electronic component by suction, whereby the electronic component is disassembled from the circuit board.

Abstract: Provided are an implanted medical device (1) and preparation method thereof, and an implanted medical device preform for preparing the implanted medical device (1). The implanted medical device (1) comprises a metal basal body (21) and a polymer film layer (22) covering the surface of the metal basal body (21) and preventing endothelium growth and covering, wherein at least a part of the surface of the metal basal body (21) is provided with a surface-modified layer (211) which contains doped ions, and the metal basal body (21) is connected to the polymer film layer (22) by the doped ions. Since the metal basal body (21) may be bonded to the polymer film layer (22) by the doped ions, the polymer film layer (22) is unlikely to separate during delivery, therefore effectively preventing endothelium growth and covering in vivo.

Abstract: Disclosed are an implantable medical device, a preparation method thereof and an implantable medical device preform for the preparation of the implantable medical device. The implantable medical device comprises a metal basal body (21) and a polymer film layer (22) covering the surface of the metal basal body (21) and preventing endothelium growth and covering, and also comprises a transitional body (23), which is located between the metal basal body (21) and the polymer film layer (22) and covers at least part of the surface of the metal basal body (21), wherein the transitional body (23) is connected to the polymer film layer (22) and the metal basal body (21). By arranging the transitional body (23) to be connected to the polymer film layer (22) and the metal basal body (21), the polymer film layer (22) will not easily fall off when being implanted into a human body.

Abstract: An apparatus to clamp and support a device includes a chassis, two clamping members, an elastic element, a driving pole, a cam, and a cover. The chassis includes a blocking tab. The two clamping members include a first clamping member and a second clamping member. The elastic element is located in a receiving hole. The driving pole is rotatable relative to the chassis. The cam can engage with the driving pole, and includes a first cam flange abutting to a first engaging post of the first clamping member. The cover is mounted to the chassis. The two clamping members and the cam are located between the chassis and the cover. The cam is rotated by the driving pole. The first cam flange urges the first engaging post to move the first clamping member away from the second clamping member.

Abstract: PFC device and controlling method thereof, and an electronic device are provided. The device includes: first and second input terminals configured to receive AC input signal including alternating positive and negative half-cycles; an output terminal configured to provide output signal; an inductor a first terminal of which is coupled with the first input terminal; a first bridge arm including first and second switch components whose first connection point is coupled with second terminal of the inductor; a second bridge arm including third and fourth switch components whose second connection point is coupled with the second input terminal; a first current sampling unit configured to sample falling edge of an inductor current flowing through the inductor; a switch controlling unit configured to generate switch control signal based on sampling result to control the first and second switch components to change switch status.

Abstract: The present disclosure provides an information transmitting method and apparatus for use in a robot operating system. A specific implementation mode of the method comprises: acquiring to-be-transmitted information; determining a network relationship between a current node and an information receiving node receiving the to-be-transmitted information, the network relationship comprising a remote relationship and a local relationship; determining a transmission approach of the to-be-transmitted information according to a message transmission parameter, a configuration parameter and the network relationship; transmitting the to-be-transmitted information in the transmission approach. The implementation mode improves the information transmission efficiency of the robot operating system.

Abstract: A controller may receive interface information, associated with one or more interfaces used to communicate with one or more components of a vehicle, and may receive application information associated with one or more applications configured to receive information from the one or more components via the one or more interfaces. The controller may store, based on the interface information and the application information, registration information that indicates whether the one or more applications are permitted to communicate via the one or more interfaces. The controller may receive, from an application of the one or more applications, a request for vehicle information from an interface of the one or more interfaces. The controller may verify whether the application is permitted to communicate via the interface, and may selectively route the request for the vehicle information to the interface based on verifying whether the application is permitted to communicate via the interface.

Abstract: An assembly for preventing accidental shutdowns includes a trigger, a first button, a resisting portion, a first driving portion, a second driving portion, a sliding block, and a processing unit. The sliding block includes at least one block and at least one groove. When the electronic device is in a shutdown state, the at least one resisting wall is in the at least one groove. When the electronic device is powered on, the processing unit controls the first driving portion to drive the resisting portion to rise up, and controls the second driving portion to drive the sliding block to move horizontally related to the first button until one end of the resisting wall resists against the first button. The other end of the resisting wall resists against the at least one block. An electronic device with the assembly is also provided.

Abstract: A motor drive system is provided, which includes: an inverter coupled with two terminals of a power supply, where the inverter includes multiple semi-conductive switch elements and is configured to convert a voltage provided by the power supply to an alternating current to drive a motor; a microcontroller configured to output a drive signal to control an power mode of the semi-conductive switch elements in the inverter; and a rheostat coupled with the microcontroller and configured to provide an input signal to the microcontroller by sliding, where the microcontroller outputs a brake signal to the inverter to control the motor to stop operating when the input signal meets a predetermined condition, and the microcontroller is powered off when the motor stops rotating.

Abstract: A motor drive system is provided, which includes an inverter coupled with two terminals of a power supply, where the inverter includes multiple semi-conductive switch elements and is configured to convert a voltage provided by the power supply to an alternating current to drive a motor; a microcontroller coupled with two terminals of the power supply, where the microcontroller has an operation mode and a sleep mode; and a switch body, of which two terminals are respectively coupled with two terminals of the microcontroller, where the switch body is configured to output a response signal to the microcontroller to switch the microcontroller from the operation mode to the sleep mode or from the sleep mode to the operation mode according to the response signal.

Abstract: A motor drive system is provided, which includes: an inverter including an upper-half bridge and a lower-half bridge, the upper-half bridge and the lower-half bridge each including at least two semi-conductive switch elements, where the inverter is configured to convert a voltage provided by a power supply to an alternating current to drive a motor; a microcontroller configured to output a drive signal to the alternately turn on each two of the at least two semi-conductive switch elements of the upper-half bridge and each two of the at least two semi-conductive switch elements of the lower-half bridge when the motor performs braking, whereby a motor winding and the turned-on semi-conductive switch elements form a circuit a capacitor configured to supply power to the microcontroller when the motor performs braking.

Abstract: A multi-use switch for an electronic device includes a pressing piece configured to be pressed by an external force, a number of conducting elements located on the pressing piece and electrically coupled to a number of functional circuits of the electronic device one-to-one, and at least one coupling element configured to be electrically coupled to the conducting elements. The multi-use switch is partially received inside a housing. The coupling element is fixed to the housing. The pressing piece moves along an axis to move the conducting elements relative to the coupling element. The coupling element completes an electric circuit of one of the functional circuits when the corresponding conducting element is moved to electrically couple to the at least one coupling element. One electric circuit of the functional circuits is able to be completed at any one time.

Abstract: A motor control system controls power supplying of a motor. The motor control system is configured to control the motor be excited in advance of a zero crossing of a back electromotive force by an advance angle, and the advance angle gradually increases from an acceleration mode to a constant speed operating mode after the motor is started. The motor control system is further configured to control the motor to be excited within a conduction angle, and the conduction angle gradually reduces to a pre-determined value from the acceleration mode to the constant speed operating mode after the motor is started.

Abstract: A motor control system includes a drive controller and an inverter having two half bridges. When an excitation voltage for a motor is inverted or the motor is freewheeled, the drive controller turns off one semiconductor switch and turns on the other semiconductor switch after delaying for a delay angle in same half-bridge.

Abstract: A method, client, server and system for multi-person audio-video interaction are disclosed in the present invention, which belong to the field of internet terminal. The method includes: obtaining channel configuration information corresponding to current channel from a server; loading a scene module corresponding to the current channel according to the obtained channel configuration information and pre-stored configuration information; obtaining and displaying pictures or videos corresponding to the current channel from the server; displaying the text information by a simulation object corresponding to the client in a user interaction region of the scene module; and sending the text information to the server, when the text information that triggered by the user in the user interaction region of the scene module is received.

Abstract: An apparatus for disassembling an electronic component from a circuit board includes a base, a controller, a positioning assembly, and a heating and suction assembly. The controller is fixed to the base. The positioning assembly is arranged on the base and coupled to the controller. The positioning assembly is configured to be controlled by the controller to position the circuit board at a first predetermined position. The heating and suction assembly is movably arranged on the base and coupled to the controller. The heating and suction assembly is moved to a second predetermined position to heat the electronic component and moved to a third predetermined position to attract and hold the heated electronic component by suction, whereby the electronic component is disassembled from the circuit board.

Abstract: Disclosed is a control method for a series resonant converter is provided, which includes: a feedback signal is acquired by collecting an analog output signal of a series resonant converter, and an operating frequency of the series resonant converter is changed according to the feedback signal; the series resonant converter adopts a hybrid control mode combing frequency and width modulation with width-fixed frequency modulation when lightly loaded or unloaded and a frequency modulation control mode when heavily loaded, wherein a switching can be conducted between the hybrid control mode and the frequency modulation control mode through hysteresis control.

Abstract: A multi-use switch for an electronic device includes a pressing piece configured to be pressed by an external force, a number of conducting elements located on the pressing piece and electrically coupled to a number of functional circuits of the electronic device one-to-one, and at least one coupling element configured to be electrically coupled to the conducting elements. The multi-use switch is partially received inside a housing. The coupling element is fixed to the housing. The pressing piece moves along an axis to move the conducting elements relative to the coupling element. The coupling element completes an electric circuit of one of the functional circuits when the corresponding conducting element is moved to electrically couple to the at least one coupling element. One electric circuit of the functional circuits is able to be completed at any one time.

Abstract: An LC optical fiber cable adapter includes a main body and a connecting mechanism. The main body includes a base wall, and first and second connecting walls extending respectively from opposite lateral edges of the base wall. The first connecting wall has a first front wall segment and a first rear wall segment. The second connecting wall has a second front wall segment and a second rear wall segment. The connecting mechanism includes a first connecting unit provided on the first front wall segment, and two second connecting units. Each of the second connecting units is provided on a respective one of the second front and rear wall segments of the second connecting wall, and has a contour matching that of the first connecting unit.