Abstract: A multi junction solar cell structure includes a first sub-cell, a first tunnel diode layer, a second tunnel diode layer, a second sub-cell, a lattice gradient buffer layer and a third sub-cell. The first sub-cell includes a first surface and a second surface opposite to the first surface. The first tunnel diode layer is formed on the first surface of the first sub-cell. The second sub-cell is formed on the first tunnel diode layer. The second tunnel diode layer is formed on the second surface of the first sub-cell. The lattice gradient buffer layer is formed on the second tunnel diode. The third sub-cell is formed on the lattice gradient buffer layer. This disclosure also contains a method for manufacturing the above-mentioned multi-junction solar cell.

Abstract: A low pressure drop automotive liquid-cooling heat dissipation plate and an enclosed automotive liquid-cooling cooler having the same are provided. The low pressure drop automotive liquid-cooling heat dissipation plate includes a heat dissipation plate body and three fin sets. The heat dissipation plate body has a first heat dissipation surface and a second heat dissipation surface that are opposite to each other. The first heat dissipation surface is in contact with three traction inverter power component sets, and the second heat dissipation surface is in contact with a cooling fluid. Three heat dissipation regions that are spaced equidistantly apart from each other and that have a same size are defined on the second heat dissipation surface along a flow direction of the cooling fluid, and respectively correspond to three projection areas formed by projecting three traction inverter power component sets on the second heat dissipation surface.

Abstract: A driving model training method, a driver identification method, an apparatus, a device and a medium are provided. The training method comprises: acquiring training behavior data of a user wherein the training behavior data are associated with a user identifier; acquiring training driving data associated with the user identifier based on the training behavior data; acquiring positive and negative samples from the training driving data based on the user identifier, and dividing the positive and negative samples into a training set and a test set; training the training set using a bagging algorithm, and acquiring an original driving model; testing the original driving model using the test set, and acquiring a target driving model. The training method effectively enhances generalization of the driving model, solves the problem of poor identification results of the existing driving identification model, and improves the accuracy rate of identifying driving of drivers.

Abstract: A battery cover includes a top cover assembly and an insulating support. The top cover assembly can be fixedly connected with a case to form an accommodation space for accommodating a core, and the top cover assembly can be welded with a tab on the core. The insulating support can be accommodated in the accommodation space. The insulating support and the top cover assembly form an accommodation cavity for accommodating the tab, and the insulating support is provided with a notch for the tab to pass through.

Abstract: A low pressure drop automotive liquid-cooling heat dissipation plate and an enclosed automotive liquid-cooling cooler having the same are provided. The low pressure drop automotive liquid-cooling heat dissipation plate includes a heat dissipation plate body and three fin sets. The heat dissipation plate body has a first heat dissipation surface and a second heat dissipation surface that are opposite to each other. The first heat dissipation surface is in contact with three traction inverter power component sets, and the second heat dissipation surface is in contact with a cooling fluid. Three heat dissipation regions that are spaced equidistantly apart from each other and that have a same size are defined on the second heat dissipation surface along a flow direction of the cooling fluid, and respectively correspond to three projection areas formed by projecting three traction inverter power component sets on the second heat dissipation surface.

Abstract: A radio link monitoring method performed by user equipment, includes: determining configuration information for performing a radio link monitoring operation on a plurality of Bandwidth Parts of a system bandwidth; and performing the radio link monitoring operation on a plurality of target BWPs among the plurality of BWPs of the system bandwidth in accordance with the configuration information. Specifically, the preforming the radio link monitoring operation on the plurality of target BWPs comprises: performing the radio link monitoring operation on the plurality of target BWPs through one counting unit for the radio link monitoring operation.

Abstract: The present disclosure discloses a color matching evaluation method combining similarity measure and visual perception. The method includes: firstly, constructing an image database with rich color information; extracting main colors from an acquired image using an improved clustering method for color matching; generating a corresponding palette using an intelligent color matching recommendation system, and evaluating a palette similarity using a minimum color difference model; then, recoloring the corresponding image using the generated palette through an image recoloring technology to obtain a recolored image, and calculating a structural similarity between the source image and the recolored image; performing feature level adaptive weighted fusion on the palette similarity and the structural similarity, and performing an eye movement tracking experiment on the source image and the recolored image to obtain visual perception data of the images.

Abstract: A projection device includes a housing and a bracket assembly. The housing has a first side wall and a second side wall connected to each other, the first side wall has a connecting portion and a limit groove, the limit groove has a curved section and a linear section connected to each other. The second side wall has a projection hole. The bracket assembly includes an adapter and a bracket. The adapter is movably connected to the connecting portion. The bracket is pivotally connected to the adapter and has a limit post extending into the limit groove. When the limit post moves to the linear section, the adapter is adapted to move in the connecting portion and drives the limit post to move in the linear section, so the bracket can be closer to the projection hole and the effect of covering the projection hole by the bracket is improved.

Abstract: A negative electrode composition includes a silicon containing material and a crosslinked polymer containing coating surrounding at least a portion of the silicon containing material. The crosslinked polymer containing coating comprises a (co)polymer derived from polymerization of one or more vinylic monomers comprising a carboxyl or carboxylate group.

Abstract: A measurement apparatus (100), which is arranged on a pipe (101), and is configured to measure the liquid content of a medium within the pipe (101); said apparatus comprises: a light transmission member (210), a light generation device (203), and a light reception device (204); the light generation device (203) is configured to emit emission light toward the light transmission member (210) that passes through an outer boundary wall (214) of the light transmission member (210) and has a preset emission angle, and the light reception device (204) is configured to receive reflection light after the emission light is reflected by an inner boundary wall (215) of the light transmission member (210). The measurement apparatus (100) can directly detect whether liquid is carried in a gaseous refrigerant exiting from an evaporator, as well as measure the amount of carried liquid.

Abstract: A light-emitting element includes a pair of electrodes, a first light-emitting unit, a second light-emitting unit, and a charge generation layer. The first light-emitting unit, between the pair of electrodes, and the first light-emitting unit, includes a first light-emitting layer. The second light-emitting unit, between the pair of electrodes, includes a second light-emitting layer. A first luminescent layer includes a first main body material, a second main body material, a first guest material, and a first auxiliary material, and the first main body material forms a first excimer complex with the second main body material. A first excited triplet state energy level of the first auxiliary material is lower than a first excited triplet state energy level of the first excimer complex, and the first excited triplet state energy level of the first auxiliary material is higher than that of the first guest material.

Abstract: An optical display system and an electronics apparatus are disclosed. The optical display system comprises: a display unit, which generate a first image light and a second image light, wherein the first image light is in a first polarization state and the second image light is in a second polarization state and the first image light and the second image light are generated by a same display panel; a resolution enhancement optic unit, which enhances the resolution of the first image light with respect to the second image light; and a magnifying optic unit, which magnify the first and second image lights from the resolution enhancement optic unit.

Abstract: A data management system comprises: a storage appliance configured to store a snapshot of a virtual machine; and one or more processors in communication with the storage appliance. The one or more processors are configured to perform operations including: identifying a plurality of shards of the virtual machine; requesting a snapshot of each of the plurality of shards; receiving the shards asynchronously; ordering the received snapshot shards sequentially into a results queue; and storing a single snapshot of the virtual machine based on the ordered snapshot shards. Operations may further include maintaining a flow control queue that limits the number of snapshot shards requested.

Abstract: The present disclosure relates to an apparatus and a method for wafer cleaning. The apparatus can include a wafer holder configured to hold a wafer; a cleaning nozzle configured to dispense a cleaning fluid onto a first surface (e.g., front surface) of the wafer; and a cleaning brush configured to clean a second surface (e.g., back surface) of the wafer. Using the cleaning fluid, the cleaning brush can clean the second surface of the wafer with a scrubbing motion and ultrasonic vibration.

Abstract: A method for evaluating a downhole working condition of a PDC bit includes: performing an indoor test, including performing a drilling test in different full-sized cores by using the PDC bit with different degrees of abrasion and balling under condition of given WOB and rotational speed, to acquire change characteristics of a WOB, a rotational speed, a torque, a ROP and a bit vibration of the PDC bit in different time domains; improving and perfecting an existing prediction model and evaluation method for the downhole working condition through data obtained by the test to obtain the method; reading parameters of the WOB, the rotational speed, the torque and the ROP in real time during drilling; determining the downhole working condition of the PDC bit by using the method in the improving and perfecting.

Abstract: A vehicle water-cooling heat sink plate having fin sets with different surface areas is provided. The vehicle water-cooling heat sink plate includes a heat-dissipating plate body and three fin sets. The heat-dissipating plate body has a first heat-dissipating surface and a second heat-dissipating surface that are opposite to each other, the first heat-dissipating surface is used for contacting three traction inverter power component sets, and the second heat-dissipating surface is used for contacting a cooling fluid. The second heat-dissipating surface of the heat-dissipating plate body along a flow direction of the cooling fluid is divided into three heat-dissipating areas which are spaced apart from each other and have the same size, and the three heat-dissipating areas respectively correspond to three projection areas that are respectively generated by the three traction inverter power component sets.

Abstract: An optical display system and an electronics device are disclosed. The optical display system comprises: a display, which generating image light of a first polarization; a partial reflector, which transmits the image light without changing its polarization and reflects the image light with its polarization being changed to a second polarization; a first optic unit, placed after the partial reflector, which includes at least one refractive lens for chromatic aberration correction; and a reflection-type Pancharatnam-Berry lens, which is placed after the first optic unit and works in the Bragg regime, and which reflects the image light of the first polarization and transmits the image light of the second polarization.

Abstract: A curved display panel includes a first substrate, pixel units disposed on the first substrate, and black matrices disposed on a side of the sub-pixel away from the first substrate. Each of the pixel units includes a plurality of sub-pixels disposed in an array along a first direction and a second direction, each of the sub-pixels includes a long side and a short side, the long side extends along the first direction, the short side extends along the second direction. Each of the black matrices includes a first sub-part and a second sub-part, an orthographic projection of the first sub-part on the first substrate is located at an interval between orthographic projections of two adjacent sub-pixels on the first substrate, and an orthographic projection of the second sub-part on the first substrate overlaps with an orthographic projection of the short side of the sub-pixel on the first substrate.

Abstract: A group III-N based semiconductor 3D integrated circuit that directly stacks a thin-film transistor on a group III-N based transistor is provided. Since the group III-N based semiconductor 3D integrated circuit integrates the group III-N based transistor and the thin-film transistor without performing a packaging process, the group III-N based semiconductor 3D integrated circuit can reduce the packaging cost and have better circuit performance and reliability.