Abstract: A power generation device and method based on the time-varying magductance principle relate to the field of energy conversion, and in particular relate to an electromagnetic induction power generation device. The power generation device includes an electric energy generation unit, a power conversion unit and an electric energy storage unit. The electric energy generation unit includes a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux. By changing a magductance parameter of the time-varying magductance component, the time-varying magductance component generates induced current. The power conversion unit consists of a switching device and a circuit. The electric energy generated by the time-varying magductance component can be stored into the electric energy storage unit through controlling the switching device.

Abstract: A method of operating a wire bonding machine is provided. The method includes: (a) operating a wire bonding machine during at least one of (i) an automatic wire bonding operation and (ii) a dry cycle wire bonding operation, wherein a bonding force is applied during the operation of the wire bonding machine; and (b) monitoring an accuracy of the bonding force of the wire bonding machine during the at least one of (i) an automatic wire bonding operation and (ii) a dry cycle wire bonding operation.

Abstract: A battery is detachably mounted on an unmanned aerial vehicle by using at least one attachment mechanism. The battery monitoring method includes: detecting, by the battery, before the unmanned aerial vehicle takes off, whether the at least one attachment mechanism is in place; and sending, by the battery, a first signal to the flight control system in response to detecting that the at least one attachment mechanism is in place, wherein the first signal is configured to instruct the flight control system to initiate takeoff of the unmanned aerial vehicle; or sending, by the battery, a second signal to the flight control system in response to detecting that at least one of the at least one attachment mechanism is not in place, wherein the second signal is configured to instruct the flight control system to prevent takeoff of the unmanned aerial vehicle.

Abstract: A display apparatus and a driving method therefor. The driving method includes: determining a gaze area and a non-gaze area of a user on a display apparatus in real time; and driving the gaze area for image displaying at a first resolution, and driving the non-gaze area for image displaying at a second resolution, wherein the first resolution is higher than the second resolution. By means of the display apparatus, image resolution can be adjusted according to different areas, so as to realize high-resolution image display in a display area at which a user gazes and realize low-resolution image display in other areas, thereby reducing power consumption and achieving reasonable allocation of resources on the premise of ensuring the user experience.

Abstract: A display panel includes a base substrate and a plurality of sub-pixel groups. The plurality of sub-pixel groups includes a first sub-pixel group and a second sub-pixel group. The first sub-pixel group includes two adjacent sub-pixels with a first interval therebetween, and the second sub-pixel group includes two adjacent sub-pixels with a second interval therebetween. The first interval is different from the second interval.

Abstract: The present disclosure provides a gate driving circuit, a method of driving a gate driving circuit, and a display panel. The gate driving circuit includes a plurality of driving units connected in cascade. Each driving unit includes: N shift register units; and a mode control circuit connected to the N shift register units, wherein the mode control circuit is configured to receive a control signal for the driving unit, and connect the N shift register units in one of a plurality of resolution modes under the control of the control signal.

Abstract: A battery quick-change device of a portable power station includes a power station housing and several detachable batteries; the power station housing has several battery compartments for accommodating the several detachable batteries; each of the several battery compartments is provided with a compartment opening and a first connector located in a respective battery compartment; each of the several detachable batteries is provided with a second connector capable of being inserted into the first connector; each of the several detachable batteries is assembled into a respective battery compartment through the compartment opening, and the second connector is inserted into the first connector; and the several detachable batteries when assembled into the several battery compartments are electrically connected in parallel.

Abstract: A method of determining a new search height for a wire bonding process is provided. The method includes the steps of: providing a search height; performing a plurality of wire bonding operations using the search height; monitoring wire bonding evaluation criteria during each of the plurality of wire bonding operations; and determining a new search height using the monitored wire bonding evaluation criteria.

Abstract: A method of determining a height value of a wire loop on a wire bonding machine is provided. The method includes the steps of: (a) imaging at least a portion of a wire loop using an imaging system on a wire bonding machine to detect a path of the portion of the wire loop; (b) moving a wire bonding tool towards a first contact portion of the wire loop in the path; (c) detecting when a portion of a conductive wire engaged with the wire bonding tool contacts the first contact portion of the wire loop; and (d) determining a height value of the wire loop at the first contact portion based on a position of the wire bonding tool when the portion of the conductive wire contacts the first contact portion of the wire loop.

Abstract: The present invention discloses a calculation method of eddy current loss in magnetic materials based on magnetic-inductance. The present invention proposes a vector model of a magnetic circuit, an eddy current reaction is equivalent to a magnetic-inductance component in the magnetic circuit, and the eddy current loss can be fast calculated by the vector model of the magnetic circuit. When the frequency is high, the eddy current loss dominates an iron loss and can be estimated as an entire iron loss. The present invention proposes the vector model of the magnetic circuit based on which the calculation method of eddy current loss in magnetic materials is proposed as well. Through the proposed method the eddy current loss in magnetic materials can be directly calculated by using the magnetic-inductance and the magnetic flux in the magnetic circuit, which can provide guidance for design and performance evaluation of high-frequency electrical equipment from a brand new viewpoint.

Abstract: A method of determining an effect of electronic component placement accuracy on wire loops in a semiconductor package is provided. The method includes the steps of: (a) providing package data for a semiconductor package, the semiconductor package including an electronic component; (b) simulating placement of the electronic component in a plurality of positions with respect to a substrate in the semiconductor package; and (c) determining, using a software tool, an effect of each of the plurality of positions of the electronic component on a plurality of wire loops included in the semiconductor package.

Abstract: A method of determining suitability of a wire bonding tool for a wire bonding application is provided. The method includes the steps of: (a) providing specifications for a wire bonding tool; and (b) determining if the wire bonding tool is acceptable for a wire bonding application using (i) a software tool and (ii) the specifications provided in step (a).

Abstract: Embodiments of the present disclosure provide a DC-DC converter, and a DC output device. The DC-DC converter includes: a housing; a detachable connection structure arranged on the housing and configured to detachably connect with a battery module; a DC-DC conversion module received in the housing and configured to convert a direct current input from the battery module to a direct current at a preset voltage; and one or more current output ports arranged on the housing, the one or more current output ports are electrically connected with the DC-DC conversion module and are configured to output the direct current at the preset voltage obtained from the DC-DC conversion module.

Abstract: A display panel includes a base substrate and a plurality of sub-pixel groups. The plurality of sub-pixel groups includes a first sub-pixel group and a second sub-pixel group. The first sub-pixel group includes two adjacent sub-pixels with a first interval therebetween, and the second sub-pixel group includes two adjacent sub-pixels with a second interval therebetween. The first interval is different from the second interval.

Abstract: A display substrate and a display device. The display substrate includes a pixel circuit in which the driving circuit controls a driving current for driving the light emitter element to emit light; the first light emission control circuit applies a first voltage to a first terminal of the driving circuit in response to a first light emission control signal; the second light emission control circuit applies the driving current to the light emitter element in response to a second light emission control signal; the first reset circuit applies a first reset voltage to the control terminal of the driving circuit in response to a first reset signal; the first reset signal and the first light emission control signal are simultaneously turn-on signals during a period; the first light emission control line and the second light emission control line extend along a first direction and are arranged in a second direction.

Abstract: Embodiments of the present disclosure provide a DC-AC converter, including: a converter housing; an electrical connector, arranged on the converter housing and configured to be electrically connected with the battery module; a DC-AC conversion module arranged in the converter housing and configured to convert a direct current output from the battery module to an alternating current; and a detachable connection structure arranged on the converter housing and configured to detachably connect the DC-AC converter to the battery module. Embodiments of the present disclosure further provide an AC output device, in which the DC-AC converter is detachably connected to the battery module. The DC-AC converter can be detached from the AC output device when the user does not need the current conversion function.

Abstract: Embodiments of the present disclosure relates to the technical field of mobile power supply, and a battery module of a battery-replacement outdoor power supply is provided. The battery module of the battery-replacement outdoor power supply is incorporated into a battery compartment of the battery-replacement outdoor power supply and includes a battery pack, a housing, and a quick connector penetrating through the housing. One end of the quick connector is electrically connected to the battery pack, and the other end of the quick connector is detachably connected to a slot in the battery compartment.

Abstract: The present disclosure discloses a device for centrifuge testing of a driven pile in different installation and pull-out modes, including a supporting system, a pile driving system, a pile-soil system and a measurement and acquisition system. The present disclosure further provides a method for operating the device for centrifuge testing of a driven pile in different installation and pull-out modes. The present disclosure can perform geotechnical centrifuge testing of a driven pile through penetration in different installation modes and pull-out in different pull-out modes, and provide the effective test device and method for study of a pile-soil mutual dynamic response during a whole process of penetration and a process of pull-out of the driven pile. Moreover, pile-soil deformation characteristics and the like during the processes of penetration and pull-out can be visually observed through a high-speed camera or a digital camera, and the pull-out and penetration can be tested separately.

Abstract: A method of determining a sequence for creating a plurality of wire loops is provided. The method includes (a) providing workpiece data for a workpiece. The workpiece data includes (i) position data for bonding locations of the workpiece, and (ii) wire loop data for a plurality of wire loops providing interconnection between ones of the bonding locations. The method also includes (b) analyzing the workpiece data. The step of analyzing includes considering overlap conditions between ones of the plurality of wire loops, considering wire loop heights of ones of the plurality of wire loops, considering lateral bend conditions between ones of the plurality of wire loops, and considering wire loop positions for ones of the plurality of wire loops. The method also includes (c) providing a sequence of creating the plurality of wire loops in connection with the workpiece at least partially based on the results of step (b).