Abstract: A leaf spring for coupling a heat sink to an integrated circuit includes a central portion that has an aperture; a first spring arm that is formed on a first side of the central portion and includes a first through-hole for a first fastener; a second spring arm that is formed on a second side of the central portion and includes a second through-hole for a second fastener; a first bending axis that passes through the first side and is substantially perpendicular to a longitudinal axis of the leaf spring that passes through the first through-hole and the second through-hole; and a second bending axis that passes through the second side and is substantially perpendicular to the longitudinal axis of the leaf spring.

Abstract: The present invention provides an auxiliary pre-charging device for a power converter. The power converter includes at least one power unit with an input end being connected to a medium and high voltage AC power source, and an output end being connected to a low voltage DC bus, wherein the auxiliary pre-charging device includes a switch, a transformer, a pre-charging resistor, and a rectifier sequentially connected in series, one end of the switch is connected to the medium and high voltage AC power source, and an output end of the rectifier is connected to the low voltage DC bus. The present invention also provides a pre-charging method for a power converter, which uses the aforementioned auxiliary pre-charging device to start pre-charging at the low-voltage output end of the power converter.

Abstract: The present disclosure discloses an apparatus, a method, and a device for regulating a control parameter of an excitation system and a medium. The apparatus includes a parameter obtaining module and an excitation regulation module. The parameter obtaining module is connected to a first potential transformer and a second potential transformer to obtain a voltage signal of a pumped storage generator through the first potential transformer. The excitation control module is connected to an excitation system and the parameter obtaining module to obtain a current ratio of an output voltage of the pumped storage generator to a voltage of the power grid according to the voltage signal of the pumped storage generator and the voltage signal of the power grid, and obtain a target control parameter regulation strategy for the excitation system according to the current ratio.

Abstract: A compensation circuit, including: a power management circuit and a switch circuit. The switch circuit is connected to a display panel and an operational amplifier circuit connected to the display panel. In case that a feedback voltage is greater than or equal to a target threshold, the switch circuit outputs a common voltage and an operating voltage to the operational amplifier circuit and stops outputting the common voltage to the display panel; and the operational amplifier circuit receives the common voltage and the operating voltage and outputs a compensation voltage to the display panel. In case that the feedback voltage is smaller than the target threshold, the switch circuit outputs the common voltage to the display panel and stops outputting the common voltage and the operating voltage to the operational amplifier circuit; and the operational amplifier circuit stops receiving the feedback voltage and stops outputting the compensation voltage.

Abstract: A lower vehicle body rear structure includes a rear floor integrally formed in a die-casting mode, rear floor longitudinal beam rear sections fixedly connected to the rear floor, a shelf, and a spare tire cabin. Rear floor longitudinal beams arranged on the two sides of the rear floor, and a rear floor middle cross beam and a rear floor rear cross beam which are connected between the rear floor longitudinal beams are formed on the rear floor, and rear wheel covers connected to the rear floor longitudinal beams are respectively arranged on the two sides of the rear floor. The shelf is located above the rear floor, and the two ends of the shelf are connected to the rear wheel covers by means of connecting plates; and the rear floor, the shelf and the two connecting plates are connected to form an annular structure.

Abstract: A compensation circuit and a display device. The compensation circuit includes a timing controller, a power management circuit, an operational amplifier circuit, and a delay circuit. The delay circuit is configured to prolong a time duration of the operational amplifier circuit in the operating state in a first stage, and the delay circuit controls the operational amplifier circuit to stop operation when the delay circuit is able to stably output a common voltage to the display panel. A time duration of outputting the common voltage to the display panel is prolonged in a second stage. When the operational amplifier circuit is in the operation state, the delay circuit stops outputting the common voltage to the display panel.

Abstract: The present disclosure provides a device and a method for controllable forging of a forming flow line of a complex-shaped component. The device includes a frame, a shaping unit, a cushioning unit, and a cleaning unit, and the frame is used to mount and fix the shaping unit, the cushioning unit, and the cleaning unit; the shaping unit is used to improve a shaping capacity of processed parts; the cushioning unit is used to reduce a vibration in a metal shaping process to avoid an impact on the shaping of the metal; the cleaning unit is used to clean up a surface of a mold after shaping; when the metal is put into the mold, the metal is extruded and shaped through the shaping unit, and at the same time, the cushioning unit is used to offset the vibration generated by the shaping unit during the shaping process.

Abstract: A tapping apparatus adapted for tapping a workpiece includes a lower die unit to drive the workpiece to move along a conveying direction, and an upper die unit disposed above and movable upwardly and downwardly relative to the lower die unit. A tapping mechanism is disposed between the lower and upper die units to be driven by the upper die unit for tapping the workpiece so that the workpiece is formed with a tapped hole. A thread checking mechanism is disposed between the lower and upper die units and is spaced apart from the tapping mechanism along the conveying direction. The thread checking mechanism is driven by the upper die unit for checking the tapped hole of the workpiece.

Abstract: The present application provides a positive electrode active material comprising a matrix material and a coating layer on the surface of the matrix material, wherein the matrix material has a chemical formula of LiNixCoyMnzMaM?bO2, wherein M=at least one of Zr, Y, Al, Ti, W, Sr, Ta, Sb, Nb, Na, K, Ca or Ce, M?=at least one of N, F, S or Cl, 0.80?x?1.0, 0?y?0.20, 0?z?0.02, 0?a?0.02, and b=1-x-y-z-a; and the coating layer is a boron-containing ternary alloy or a boron-containing ternary alloy oxide. The present application further provides a method for preparing the positive electrode active material, a positive electrode plate comprising the positive electrode active material, a secondary battery, a battery module, a battery pack and a power consuming device.

Abstract: The present disclosure provides a complex formed by metal lithium and a network skeleton material having a lithiophilic modification layer, a preparation method therefor and application thereof. The method of the present application can realize the industrial preparation of a complex of metal lithium and a network skeleton material having a highly lithiophilic modification layer, and the metal lithium and the carbon material in the complex as prepared are completely infiltrated with each other, such that there is no delamination or void in the complex. The conductive 3D carbon skeleton structure in the complex can provide a reserved space for metal lithium deposition, thereby alleviating the volume expansion of the metal lithium negative electrode. The conductivity of the carbon skeleton structure can reduce the current density on the electrode surface, thereby reducing the generation and growth of lithium dendrites.

Abstract: A method and an apparatus for driving a display panel, and a display driver integrated circuit chip are provided. The method includes: determining an order in which display divisions on the display panel are to be driven, when determined not to update respective refresh rates of the display divisions; determining electric signal gear ranges for the display divisions based on the refresh rates of the display divisions, respectively; and driving the display divisions sequentially in the determined order and based on the determined gear ranges. With this method, the power consumption can be reduced while the display effect is improved.

Abstract: The present application relates to a positive electrode active material comprising a first positive electrode active material, which comprises a substrate of formula (I), wherein the substrate is doped with an element M1: LiA1[NiX1CoY1MnZ1]O2 (I); and a second positive electrode active material, which comprises a substrate of formula (II), wherein the substrate is doped with an element M2: LiA2[NiX2CoY2MnZ2]O2 (II); the average particle size Dv50 of the first positive electrode active material is greater than that of the second positive electrode active material, wherein 0<X2?X1?0.4, and optionally 0<X2?X1?0.1. The present application further relates to a method for preparing the positive electrode active material, a secondary battery, and a power consuming device.

Abstract: An apparatus configured to initiate an operation to locate a target device, generate, for transmission to the target device, Bluetooth discovery signals for detecting a proximity of the target device, generate, for transmission to the target device at substantially a same time as the Bluetooth discovery signals, a discovery message via a network connection, detect a Bluetooth discovery response or a response to the discovery message from the target device and trigger an ultra-wideband (UWB) ranging operation based on detection of the Bluetooth discovery response or response to the discovery message.

Abstract: To have high maintainability, a rotary actuator includes a groove on a second ring surface being a facing portion of a base facing a rotary member and extending in the rotation direction of the rotary member, a spherical member on a rear surface being a facing portion of the rotary member facing the base and movable in the groove in response to the rotary member rotating relative to the base, and first and second detection switches adjacent to two longitudinal ends of the groove and operable by the spherical member. A control unit causes the rotary member to rotate relative to the base periodically and causes the spherical member to press the first or second detection switch to correct the angle position of a stepper motor to a normal position.

Abstract: The present disclosure provides a cluster management method, device, electronic device and storage medium. The cluster management method includes: initiating, by a meta cluster, an addition and deletion task for a work cluster, wherein the addition and deletion task for a work cluster is used for instructing addition of a specified work cluster to a cluster system or instructing deletion of the specified work cluster from the cluster system; and controlling the specified work cluster to implement corresponding cluster deployment or removal in the cluster system according to instruction information of the addition and deletion task.

Abstract: The embodiment of the disclosure relates to a touch animation display method and apparatus, device, and medium, wherein the method includes the following steps: identifying a human body key point position on a human body in an existing video frame; according to a predetermined motion mode, acquiring a display position of a target object in the existing video frame; according to the human body key point position and the display position, judging whether a preset touch condition is satisfied; if the touch condition is satisfied, adjusting a motion mode of the target object according to a target key point position. Therefore, by displaying the target object in the video frame, the touch motion during interaction with a user is simulated in real time, the interestingness of video display is improved, and the user's interaction experience is improved.

Abstract: A method in an illustrative embodiment includes determining that a first object authenticated by an electronic device is accessing the electronic device. The method further includes, in response to a second object being detected within a detection range using a radar of the electronic device, determining, based on a detected signal, that the second object is a person. The method further includes determining a distance and an angle between the second object and the electronic device based on an azimuth signal in the detected signal. The method further includes in response to determining that the distance is less than a distance threshold and the angle is less than an angle threshold, determining, based on the biological feature signal, whether the second object is trustworthy. The method further includes deauthenticating the first object in response to determining that the second object is untrustworthy.

Abstract: A memory device includes a memory string, and a control logic coupled to the memory string. The control logic is configured to perform a first programming operation and a second programming operation on a selected memory cell of the memory string, after the first programming operation and before the second programming operation, apply a ground voltage to a first word line coupled to the selected memory cell, and apply a first voltage to a second word line coupled to an unselected memory cell of the memory string, wherein the first voltage is higher than the ground voltage.