Abstract: Embodiments of the present disclosure relate to a solar cell and a photovoltaic module. The solar cell includes a thin-film solar cell and a bottom cell stacked in a first direction. The bottom cell has a stacked structure in the first direction including: a transparent conductive layer, a first doped conductive layer, an intrinsic amorphous silicon layer, a substrate, a selective passivation layer, and one or more electrodes. The selective passivation layer covers a portion of a surface of the substrate away from the intrinsic amorphous silicon layer and includes a plurality of passivation contact structures arranged at intervals in a second direction. Each passivation contact structure includes a tunneling layer and a second doped conductive layer stacked in the first direction. The electrodes are formed on a surface of the selective passivation layer away from the substrate and are in ohmic contact with second doped conductive layers.

Abstract: The solar cell includes a substrate having electrode regions and non-electrode regions defined alternatively, where a surface of the electrode regions has a first surface structure, a surface of the non-electrode regions has a second surface structure, the first surface structure has a smaller roughness than the second surface structure, and the second surface structure includes multiple first protrusion structures. The solar cell further includes a tunneling dielectric layer, and a first doped conductive layer arranged on the tunneling dielectric layer. The solar cell further includes a passivation layer arranged on the non-electrode regions and the first doped conductive layer and a first electrode arranged in the electrode regions. The first electrode penetrates the passivation layer to be in electrical contact with the first doped conductive layer.

Abstract: Embodiments of the present disclosure relate to a solar cell and a photovoltaic module. The solar cell includes a thin-film solar cell and a bottom cell stacked in a first direction. The bottom cell includes: a transparent conductive layer, a first doped conductive layer, an intrinsic amorphous silicon layer, a substrate, a second doped conductive layer, and one or more electrodes that are stacked in the first direction. The transparent conductive layer is between the thin-film solar cell and the first doped conductive layer, and the one or more electrodes are formed on a side of the second doped conductive layer away from the substrate, the one or more electrodes are in ohmic contact with the second doped conductive layer. The first doped conductive layer includes a doped amorphous silicon layer or a doped microcrystalline silicon layer.

Abstract: A telescopic mechanism includes a fixed part, a movable part and a telescopic assembly, where the telescopic assembly includes m folding telescopic frames and m-1 balance connecting rod groups; two ends of the folding telescopic frame are connected to the fixed part and the movable part respectively, the m folding telescopic frames are disposed at intervals in a first direction, and the first direction is perpendicular to a telescoping direction of the telescopic assembly; and each balance connecting rod group is disposed between two adjacent folding telescopic frames, each balance connecting rod group includes at least one balance connecting rod, and two ends of each balance connecting rod are connected to the two adjacent folding telescopic frames respectively.

Abstract: A solar cell including: substrate having front and back surfaces, the back surface includes first, second and gap regions, the first and second regions are staggered and spaced from each other in a first direction, and each gap region is provided between adjacent first and second regions, first pyramidal texture structure regions are formed corresponding to gap regions and distance between top and bottom thereof is 2-4 ?m; first conductive layer formed over the first region; second conductive layer formed over the second region, the second conductive layer has conductivity type opposite to the first conductive layer; first electrode forming electrical contact with the first conductive layer; second electrode forming electrical contact with the second conductive layer; and boundary region between the gap region and the first and/or second conductive layer adjacent thereto, and the boundary region includes strip or line patterned texture structures arranged at intervals.

Abstract: A preparation method for improving light efficiency and stability of light storing ceramics is provided. Calcium ethanol solution is added into titanium precursor solution firstly and oleic acid dispersant is added, pure water and the light storing powder are subsequently added to obtain a light-storing powder-calcium titanate gel, and dried, crushed and sieved to obtain xerogel powder. Glass matrix material, sieved xerogel powder and another dispersant are placed into a granulator, and directly mechanically stirred and granulated after adding pure water. A plasticizer is added after stirring 4˜8 h, and continuously stirred for 1˜3 h to obtain a mixture, pressing, drying and firing. Calcium titanate is manually introduced to protect the light-storing powder from hydrolysis or high-temperature oxidation. It can also change the propagation path of fluorescence inside ceramics, improve light absorption and fluorescence output efficiency and is conducive to ceramic molding.

Abstract: This application discloses a cryopump, including a pump housing, a radiation shield in the pump housing, a first-stage cold storage component in the pump housing, a second-stage cold storage component in the holding space of the radiation shield, a connector connecting the first-stage cold storage component and the radiation shield, and a cryopanel assembly in the holding space and connected to the second-stage cold storage component.

Abstract: Provided is a solar cell and a photovoltaic module. The solar cell includes a silicon substrate, and the silicon substrate includes a front surface and a back surface arranged opposite to each other. P-type conductive regions and N-type conductive regions are alternately arranged on the back surface of the silicon substrate. Front surface field regions are located on the front surface of the silicon substrate and spaced from each other. The front surface field regions each corresponds to one of the P-type conductive regions or one of the N-type conductive regions. At least one front passivation layer is located on the front surface of the silicon substrate. At least one back passivation layer is located on surfaces of the P-type conductive regions and N-type conductive regions.

Abstract: The tandem cell includes a bottom cell including a substrate. The substrate has a first side and a second side, the first side has a first textured surface including at least one first protrusion structure. The bottom cell further includes a tunneling dielectric layer and a doped conductive layer. A surface of the doped conductive layer has a micro textured surface including at least one micro protrusion structure, and the micro protrusion structure is smaller than the first protrusion structure. The tandem cell further includes a composite layer conformal to the micro textured surface. The tandem cell further includes a top cell formed on the composite layer. The top cell includes a first transport layer, a perovskite substrate, a second transport layer, a transparent conductive layer, and an anti-reflection layer stacked sequentially. The first transport layer is conformal to the micro textured surface.

Abstract: A security defending method, a coprocessor, and a processing apparatus are disclosed. The security defending method is applicable in a coprocessor, including: receiving a jump destination encryption request for the operation task; using mask configuration to perform first mask processing on the first jump destination address value to obtain a first intermediate jump destination address value; performing an authentication operation based on the first jump destination storage address, a key reference value corresponding to the operation task and the first intermediate jump destination address value, to obtain a first encryption result value; using the mask configuration to perform second mask processing on the first encryption result value to obtain a first intermediate encryption result value; performing an authentication operation on the first intermediate encryption result value and the first jump destination address value to obtain a first encryption jump destination address value.

Abstract: A metal powder preparation system and method are provided. The metal powder preparation system includes a medium frequency smelting furnace, a homogeneous insulated quantitative pouring furnace, a precision-controlled liquid level temperature pouring ladle, and a plurality of groups of atomization mechanisms connected in sequence. The present application improves the preparation quality of the metal powder, so that the parameters such as the powder particle size, sphericity, fluidity, oxygen content, component distribution, and particle size distribution of the metal powder can all meet the requirements of high-quality metal additive manufacturing, achieving efficient and continuous preparation of the metal powder at the same time.

Abstract: The present disclosure discloses a cross-session brainprint recognition method based on a tensorized spatial-frequency attention network (TSFAN) with domain adaptation. For most of existing multi-source domain adaptation methods, domain gaps between multiple source domains and target domains are individually bridged, but a relationship between domain-invariant features in distribution alignment is ignored. The present disclosure assists performance of a target domain by modeling an important relationship of the domain-invariant features without being affected by a distribution difference between source domains. A new TSFAN is used to combine pairwise source and target and an appropriate common spatial-frequency feature across source domains. Considering of a dimension, the TSFAN is further approximated as a low-rank Tucker format, to enable the TSFAN to adapt to scale linearly in a quantity of domains, and apply the TSFAN to a case of any quantity of sessions.

Abstract: A loading system for a Hopkinson pressure bar test under water-gas-temperature multi-field coupling action includes: a sample sealed cabin which includes sealing flanges, Y-shaped and high-temperature resistant sealing rings, and a sealed cabin body; a gas pressure loading device which includes a high-pressure gas tank, a pressure regulating valve, a second barometer, a second high-pressure valve and a first three-way valve connected in sequence; a water pressure loading device which includes an electric pressure test water pump, a water pressure gauge, an accumulator and a one-way valve connected in sequence; a temperature loading device which includes thermocouple heating rods, a temperature display and a thermocouple temperature control circuit board connected in sequence; and a dynamic and static combined loading device which includes an axial pressure loading device, an impact loading device and a Hopkinson pressure bar member.

Abstract: A device and method for testing bearing capacity of single-row grouped pillars in a horizontal goaf under biaxial loading is disclosed. Four fixed rings are arranged on testing machine base, and have stands installed therein respectively, bottom ends of the stands are connected with the base, top ends are connected with transverse frame, sliding rails are arranged on two sides of the base; the vertical force loading devices are arranged at a lower part of transverse frame and the horizontal force loading devices are arranged at inner sides of side frame. Simultaneous loading on multiple coal samples, rock samples, filling body samples, concrete samples, coal-filling samples and/or rock-filling samples can be achieved, the overall bearing capacity of a single-row group pillar system in the horizontal goaf under the biaxial compression condition can be obtained, and the mutual influence relation between grouped pillar individuals in the horizontal goaf can be attained.

Abstract: A device and a method for testing tensile resistance of multiple-row grouped pillars in an inclined goaf are provided. The bottoms of stands of the device are connected with a testing machine base, and the tops of the stands of the device are connected with a transverse frame; an upper slideable clamping seat and a lower slideable clamping seat are semi-cylindrical blocks, multiple lower loading jaws that are positioned to have a same central line are arranged on the lower slideable clamping seat, each of the lower loading jaws is opposite to a corresponding one of the upper loading jaws, the lower loading jaws are welded to the lower slideable clamping sea to test the tensile resistance of samples together; the upper part of the upper slideable clamping seat is connected with an upper pressure disk, and the lower slideable clamping seat is connected with a lower pressure disk.

Abstract: A loading system for a Hopkinson pressure bar test under water-gas-temperature multi-field coupling action includes: a sample sealed cabin which includes sealing flanges, Y-shaped and high-temperature resistant sealing rings, and a sealed cabin body; a gas pressure loading device which includes a high-pressure gas tank, a pressure regulating valve, a second barometer, a second high-pressure valve and a first three-way valve connected in sequence; a water pressure loading device which includes an electric pressure test water pump, a water pressure gauge, an accumulator and a one-way valve connected in sequence; a temperature loading device which includes thermocouple heating rods, a temperature display and a thermocouple temperature control circuit board connected in sequence; and a dynamic and static combined loading device which includes an axial pressure loading device, an impact loading device and a Hopkinson pressure bar member.

Abstract: A device and method for testing bearing capacity of single-row grouped pillars in a horizontal goaf under biaxial loading is disclosed. Four fixed rings are arranged on testing machine base, and have stands installed therein respectively, bottom ends of the stands are connected with the base, top ends are connected with transverse frame, sliding rails are arranged on two sides of the base; the vertical force loading devices are arranged at a lower part of transverse frame and the horizontal force loading devices are arranged at inner sides of side frame. Simultaneous loading on multiple coal samples, rock samples, filling body samples, concrete samples, coal-filling samples and/or rock-filling samples can be achieved, the overall bearing capacity of a single-row group pillar system in the horizontal goaf under the biaxial compression condition can be obtained, and the mutual influence relation between grouped pillar individuals in the horizontal goaf can be attained.

Abstract: A device and a method for testing tensile resistance of multiple-row grouped pillars in an inclined goaf are provided. The bottoms of stands of the device are connected with a testing machine base, and the tops of the stands of the device are connected with a transverse frame; an upper slideable clamping seat and a lower slideable clamping seat are semi-cylindrical blocks, multiple lower loading jaws that are positioned to have a same central line are arranged on the lower slideable clamping seat, each of the lower loading jaws is opposite to a corresponding one of the upper loading jaws, the lower loading jaws are welded to the lower slideable clamping sea to test the tensile resistance of samples together; the upper part of the upper slideable clamping seat is connected with an upper pressure disk, and the lower slideable clamping seat is connected with a lower pressure disk.

Abstract: A single skill package upgrade management apparatus for managing upgrading of skill packages installed in an intelligent robot is provided with a statistics module, a determination module, and an upgrade module. The statistics module includes a local statistics unit and a network statistics unit. The determination module includes a timeline determination unit, a number determination unit, and an integration determination unit. The determination module further arranges the skill packages in a sequence. The skill package has a highest priority is scheduled to be upgraded first. An upgrade time of each skill package is scheduled to be in the duration of use having the least number of uses of each skill package. There is further provided a privilege module. A single skill package upgrade management method is also provided.

Abstract: A robot training method under a virtual environment includes receiving voice signals; and controlling a robot in the virtual environment in response to the received voice signals. The voice signals include a training time signal and a training program signal. Prior to training a user may select training time of a desired training program by pronouncing a voice. The user may change the training time of the desired training program. The user may select an optimum training time based on schedule. A robot training method under the virtual environment is also provided.