Abstract: A radio frequency (RF) power amplifier based on transformer matching is provided. The RF power amplifier includes: a first-stage amplification circuit configured with an input terminal and an output terminal, wherein the output terminal of the first-stage amplification circuit is configured to be connected to one terminal of a main coil of a first transformer; the first transformer configured to include the main coil and a secondary coil, wherein one terminal of the secondary coil is grounded and the other terminal of the secondary coil is connected to a medium-low power mode input terminal of a power switch; the second-stage amplification circuit configured with an input terminal for receiving the amplified RF signal from the first-stage amplification circuit, wherein an output terminal of the second-stage amplification circuit is configured to be connected to a high power mode input terminal of the power switch.

Abstract: A heat dissipation apparatus includes at least two heating components, at least two fans, and at least two isolation components. Heat dissipation channels are disposed inside the at least two heating components, and a fan is provided in each heat dissipation channel. An isolation component is coupled to an air inlet and/or an air outlet of the heat dissipation channel. The isolation component may isolate an air inlet or air outlet of each heating component from an air inlet or air outlet of another heating component, so as to avoid forming a loop between a heat dissipation channel in which a working fan is located and a heat dissipation channel in which a non-working fan is located.

Abstract: Systems and techniques are described herein for displaying images. For instance, a method for displaying images is provided. The method may include obtaining image data for display at a display of a head-mounted device (HMD); determining a content-based region of interest (ROI) within the image data based on content of the image data; determining a gaze-based ROI of the image data based on gaze information; displaying, at the display, content-based-ROI image data of the content-based ROI at a first resolution; displaying, at the display, gaze-based ROI image data of the gaze-based ROI at a second resolution; and displaying, at the display, peripheral image data outside the content-based ROI and outside the ROI at a third resolution.

Abstract: An energy storage apparatus includes a cabinet, cyclic cooling units, a support, battery modules, and an air supply duct. The support is fastened in an inner cavity of the cabinet, the battery modules are fastened on the support, and the support and the battery modules jointly separate the inner cavity into an air intake region and an air return region. A heat dissipation duct communicating with the air intake region and the air return region is disposed in the battery module. The cyclic cooling unit is located outside the cabinet and includes an air inlet vent and an air return vent. One end of the air supply duct communicates with the air inlet vent, and the other end of the air supply duct communicates with the air intake region. The air return vent communicates with the air return region.

Abstract: An energy storage system includes at least one battery pack and a thermal management system. The battery pack includes a cooling plate and a battery cell. The cooling plate comes in contact with the battery cell to transfer heat energy. The thermal management system includes a control unit, a compressor, a heat exchanger, and at least one first control valve. The control unit is configured to: when a battery cell temperature of the battery pack is greater than or equal to a first temperature threshold, control the compressor to compress a thermal management medium, so that a thermal management medium flows into the heat exchanger; and control opening of the first control valve to control the thermal management medium to flow into the cooling plate in the battery pack to exchange heat with the battery cell, to decrease the battery cell temperature.

Abstract: A power module is provided. The power module includes a housing, a connector, an inductor, a cold plate, and an air-liquid heat exchanger. The connector, the air-liquid heat exchanger, the cold plate, and the inductor are sequentially arranged inside the housing along a first direction. The housing includes a front plate and a rear plate. The front plate and the rear plate are oppositely arranged along the first direction. The connector is arranged between the air-liquid heat exchanger and the front plate along the first direction. The power module has a small size, and has good heat dissipation effect for various heat-generating components, and can reduce heat dissipation costs.

Abstract: The present disclosure provides a receiving circuit for adaptive impedance matching and an operating method thereof. The receiving circuit includes: a first amplification module configured to amplify an input signal input from an input end of the first amplification module to generate a first amplified signal; a frequency mixing module, an input end of which is connected to an output end of the first amplification module, and configured to down-convert the first amplified signal to generate a down-converted signal; and a second amplification module, an input end of which is connected to an output end of the frequency mixing module, and configured to amplify the down-converted signal to generate an output signal, wherein the first amplification module includes an active negative feedback structure for providing adaptive impedance matching in a first bandwidth range.

Abstract: Systems and techniques are described herein for generating foveated image data. For instance, an apparatus for generating foveated image data is provided. The apparatus may include a memory; and a first processor communicatively connected directly to an image sensor and communicatively connected to the memory, the first processor configured to: determine an orientation of at least one eye of a user; store an indication of the orientation in the memory; and provide the indication of the orientation to the image sensor wherein the image sensor is configured to capture a foveated image based on the indication of the orientation, the foveated image comprising a first portion and a second portion, wherein the first portion is based on the indication of the orientation and has a first resolution, and wherein the second portion has a second resolution that is lower than the first resolution.

Abstract: Provided are a ferroelectric memory, a three-dimensional ferroelectric memory, and a three-dimensional ferroelectric memory device. The ferroelectric memory includes a first word line, a first bit line, a first transistor, and a first ferroelectric capacitor pair. The first ferroelectric capacitor pair includes a first ferroelectric capacitor and a second ferroelectric capacitor, and the first ferroelectric capacitor and the second ferroelectric capacitor extend in a first direction. A control terminal of the first transistor is connected to the first word line. A second terminal of the first transistor is connected to the first bit line, and a first terminal of the first transistor is connected to upper electrode plates of the ferroelectric capacitor pair.

Abstract: An energy storage system includes a heat management apparatus and an energy storage module. The heat management apparatus is configured to exchange heat with the energy storage module. The heat management apparatus includes a refrigerant flow channel plate, a coolant flow channel plate, a multi-way valve, an evaporation plate heat exchanger, a condensation plate heat exchanger, and at least one pump. According to the energy storage system provided in this application, main devices of the heat management apparatus can be arranged in a same direction and fastened to flow channel plates.

Abstract: A method, a device (800), a medium for controlling the movement of a virtual body (107), including: a target determining step, in the first frame, based on the moving direction and position of the virtual body (107), selecting a virtual object (103) in a predetermined area as a virtual target (202); a dynamic adjusting step, calculating a horizontal moving direction (302a) of the virtual body (107), a direction of a connecting line between a vertical projection (107?a) of the virtual body (107) on the horizontal plane and a vertical projection of the virtual target on the horizontal plane, and an included angle (?1) between the horizontal moving direction (302a) of the virtual body (107) and the direction of the connecting line in each frame, and controlling the horizontal moving direction (302a) of the virtual body (107) based on the included angle (?1) (204).

Abstract: A multi-way valve includes a valve core and a valve seat. The valve seat is sleeved on the valve core. An outer circumferential surface of the valve core is in contact with an inner circumferential surface of the valve seat. The outer circumferential surface of the valve core includes a plurality of axial grooves and a plurality of circumferential grooves. The inner circumferential surface of the valve seat includes a plurality of openings. Each opening is connected to one liquid flow path through an internal channel of the valve seat. The plurality of openings is arranged in an array and at intervals along a direction of a rotation axis of the valve core and a circumferential direction of the valve core. Each opening communicates with at least one other adjacent opening through one axial groove or one circumferential groove.

Abstract: Systems and techniques are described herein for displaying images. For instance, a method for displaying images is provided. The method may include obtaining image data for display at a display of a head-mounted device (HMD); determining a content-based region of interest (ROI) within the image data based on content of the image data; determining a gaze-based ROI of the image data based on gaze information; displaying, at the display, content-based-ROI image data of the content-based ROI at a first resolution; displaying, at the display, gaze-based ROI image data of the gaze-based ROI at a second resolution; and displaying, at the display, peripheral image data outside the content-based ROI and outside the ROI at a third resolution.

Abstract: Provided are a semiconductor device and manufacturing method therefor, and a three-dimensional dynamic random access memory. The semiconductor device includes: a substrate; channel structures, arranged on the substrate along a first direction; bit lines, each arranged between one of the channel structures and the substrate and electrically connected to the channel structure, and extending along a second direction; and word lines, each arranged on at least one side of the channel structure and extending along a third direction, where the first direction intersects with the substrate, the second direction is parallel to the substrate, and the third direction is parallel to the substrate and intersects with the second direction; and the channel structure includes a filling material and an oxide semiconductor layer arranged on an outer surface of the filling material.

Abstract: Systems and techniques are described herein for generating foveated image data. For instance, an apparatus for generating foveated image data is provided. The apparatus may include a memory; and a first processor communicatively connected directly to an image sensor and communicatively connected to the memory, the first processor configured to: determine an orientation of at least one eye of a user; store an indication of the orientation in the memory; and provide the indication of the orientation to the image sensor wherein the image sensor is configured to capture a foveated image based on the indication of the orientation, the foveated image comprising a first portion and a second portion, wherein the first portion is based on the indication of the orientation and has a first resolution, and wherein the second portion has a second resolution that is lower than the first resolution.

Abstract: A three-dimensional memory array includes a first memory cell array including a plurality of memory cells stacked along a vertical direction, a plurality of word lines, and at least one bit line. Each memory cell includes a transistor and a storage node coupled in a horizontal direction and connected in parallel to each other. The transistors in the plurality of memory cells, and/or the storage nodes in the plurality of memory cells in the vertical direction are connected in series to each other. The plurality of word lines are spaced apart along the vertical direction and connected to the transistors in the plurality of memory cells in the vertical direction, respectively. The bit line extends along the vertical direction and is connected to the transistors in the plurality of memory cells in the vertical direction.

Abstract: A temperature control system, a vehicle, an energy storage system, and a multi-way valve. The temperature control system includes a plurality of liquid pipes and a multi-way valve. The multi-way valve includes a first valve body and a second valve body. The first valve body includes a first plane, the second valve body includes a second plane, and the first plane and the second plane are parallel and attached to each other. A driver drives the first plane and the second plane to rotate relative to each other around a rotation axis. The first plane includes a plurality of groups of first sector ring openings, the plurality of first sector ring openings are divided into a plurality of rings by using the rotation axis as a circle center and are spaced apart.

Abstract: An inverter includes a housing and a heat dissipation apparatus. The housing may include a first cavity and a second cavity, and a power semiconductor device is disposed in the first cavity. The second cavity has a first air inlet and a first air outlet, and a magnetic component is disposed in the second cavity. The heat dissipation apparatus includes a radiator and a first fan. The radiator includes an evaporator and a condenser that are connected to each other. The evaporator is disposed in the second cavity. The power semiconductor device is in thermally conductive contact with the evaporator, to dissipate heat for the power semiconductor device. The first fan is disposed in the second cavity, an air inlet side of the first fan faces the first air inlet, and an air outlet side of the first fan faces the first air outlet.

Abstract: An energy storage device includes a regulation apparatus, a cabinet, and a battery located in the cabinet. The regulation apparatus includes a first heat exchange plate, a radiator, a dehumidification component, and a valve body component. The first heat exchange plate is disposed in the cabinet and is in thermally conductive contact with the battery. The dehumidification component includes a compressor, a condenser, a first throttle, and a first evaporator that sequentially and circularly communicate with each other through a pipeline. The first evaporator is located in the cabinet and is configured to condense water vapor in the cabinet.

Abstract: Embodiments of this application provide a battery module, to improve consistency of cooling effects of battery cells, so that a battery cell group has a better states of health (SOH). The battery module includes: a heat dissipation mechanical part, which includes a first heat dissipation region and a second heat dissipation region. When an average distance between a heat dissipation pipe in the first heat dissipation region and a cooling medium outflow region is longer than an average distance between a heat dissipation pipe in the second heat dissipation region and the cooling medium outflow region, density of heat dissipation pipes in the first heat dissipation region is greater than density of heat dissipation pipes in the second heat dissipation region.