Abstract: The present disclosure provides a method, a system, a device and a medium for measuring gear tooth profile roughness. The method includes: obtaining design parameters of a target gear pair and test parameters of each tooth profile working point; fitting a measured surface profile and a theoretical tooth profile curve to obtain a surface structure curve; calculating a Hertzian contact width according to the design parameters and the test parameters for each tooth profile working point on the theoretical tooth profile curve, and determining an evaluation length of surface roughness according to the Hertzian contact width; filtering the surface structure curve by means of a filter with a set wavelength to obtain a surface roughness profile; and determining surface roughness parameters of each tooth profile working point in a working area according to the surface roughness profile for each evaluation length.

Abstract: The present application relates to a top cap assembly, a secondary battery, a battery module, and a device. The top cap assembly includes a top cap plate, having electrode lead-out hole; an electrode terminal, arranged at the top cap plate and covering the electrode lead-out hole; a current collecting member, in which the current collecting member includes a convex portion having an accommodating cavity, at least part of the convex portion is arranged in the electrode lead-out hole, and welded and connected to the electrode terminal to form a welding portion facing the accommodating cavity, and the current collecting member has a connecting hole; an insulating protection member, in which the insulating protection member is arranged at a side of the current collecting member away from the electrode terminal, and the insulating protection member includes a shielding portion and a connecting portion connected with the shielding portion.

Abstract: An end cover assembly includes: an end cover with a through hole for injecting electrolyte and a first clamping portion, wherein the first clamping portion is disposed along a circumferential direction of the through hole and is located on one side of the end cover away from an interior of the battery cell; a sealing ring for sealing the through hole; and a pressure relief device covering at least part of the sealing ring and closing the through hole; wherein the pressure relief device includes a second clamping portion, and is rotatable such that when the pressure relief device is rotated to a first position, the second clamping portion is clamped with the first clamping portion; and when the pressure relief device is rotated to a second position, the second clamping portion is disengaged from the first clamping portion.

Abstract: A system for a passive optical network.

Abstract: Provided are end cover, battery cell, battery and electrical device. An end cover is configured to close an opening of housing of battery cell, wherein the end cover includes an abutting portion and a first convex portion. The abutting portion includes an abutting surface, wherein the abutting surface is configured to abut against one end of the housing provided with the opening. The first convex portion is connected to the abutting portion and protrudes from the abutting surface. The first convex portion is configured to extend into the housing. The groove is arranged on the abutting surface, and the groove is arranged around the first convex portion. An external peripheral surface of the first convex portion is connected to the abutting surface through the groove wall surface of the groove.

Abstract: The present application discloses a method and an apparatus for training a backbone network, an image processing method and apparatus, and a device. A weight selection cycle is set, where the weight selection cycle may include at least one backbone network training cycle. The backbone network is trained with sample data in the current weight selection cycle, and a cumulative weight adjustment amount for each weight in the backbone network in the current weight selection cycle is recorded. A target weight for which the cumulative weight adjustment amount meets a preset condition is selected from the backbone network based on the cumulative weight adjustment amount for each weight, and only the target weight in the backbone network is adjusted in a next weight selection cycle, to complete training of the backbone network in the next weight selection cycle based on the adjusted target weight.

Abstract: In some embodiments, the battery cell includes a shell, including an opening; an electrode unit, accommodated in the shell, the electrode unit including a main body portion and a tab portion protruding from the main body portion; a cap assembly, for connecting with the shell, and covering and closing the opening; and a first insulating member, accommodated in the shell and adapted to isolate at least part of the main body portion from the shell, the first insulating member including a first insulating plate, and the first insulating plate being disposed on a side of the main body portion facing the cap assembly and being attached to the main body portion. The first insulating member can insulate at least part of the main body portion from the shell.

Abstract: A method for preparing TOPCon battery substrate and double-sided electroplated TOPcon battery prepared therefrom are provided. The method includes: providing a double-sided grooved silicon matrix of a TOPCon battery; carrying out thermal repair treatment on the silicon matrix; respectively carrying out light injection treatment on the front side and the back side of the silicon matrix after thermal repair treatment, thereby the TOPCon battery substrate is obtained. Thermal repair treatment can greatly increase the overall lattice thermal motion of the silicon substrate, and light is injected into the front side and the back side in the directions of two different light incidence surfaces, so that both the front side and the back side can absorb light, thereby repairing the defects at the interface between the amorphous silicon and the silicon wafer and improving the quality of the PN junctions.

Abstract: A slip ring assembly includes a base body, at least one first conductor, and at least one second conductor. The base body is configured to have an annular shape and adapted to be made of an insulating material, and the base body includes a first side and a second side opposite to the first side along an axial direction of the base body. The first conductor is configured to have an annular shape and adapted to be fixed on the first side or the second side. The second conductor is configured to have an annular shape and adapted to be fixed on the first side or the second side. The first conductor and the second conductor are electrically insulated, and a projection of the first conductor and a projection of the second conductor along the axial direction of the base body at least partially overlap.

Abstract: A task processing method including associating and controlling, by a processing unit, a first resource to perform a task processing operation through N virtual resource identifiers in response to a task processing instruction. N is the number of data processing resources required for the task processing operation. The first resource includes n data processing resources, and n is an integer greater than or equal to 1, n<N. The method further includes associating, by the processing unit, a second resource with N-n virtual resource identifiers when the second resource switches from a second state to a first state. The second resource includes at least one data processing resource in a cluster other than the first resource. The method further includes controlling, by the processing unit, the first resource and the second resource to continue to perform the task processing operation through the N virtual resource identifiers.

Abstract: A three-dimensional imaging method and system for surface comprehensive geophysical prospecting, the method includes: acquiring detection data of a plurality of two-dimensional profiles of a surface detection site; forming two-dimensional profile resistivity data by geophysical inversion of the detection data; performing three-dimensional coordinate conversion on the two-dimensional profile resistivity data to obtain resistivity data of a three-dimensional coordinate system; and converting the resistivity data of the three-dimensional coordinate system into a three-dimensional model by using a Kriging interpolation method.

Abstract: According to an aspect of the present disclosure, a beam control device for radiotherapy is provided. The beam control device may include an electron beam generator configured to emit an electron beam for radiotherapy toward a subject in a first direction. The beam control device may further include a first deflection device configured to generate a defocused electron beam by defocusing the electron beam in a second direction, the second direction being different from the first direction.

Abstract: A smart sand includes raw sand particles, synthetic SiO2 particles attached to the raw sand particles, a first material attached to a first set of the synthetic SiO2 particles, a second material attached to a second set of the synthetic SiO2 particles, and a third material attached to the first material. Each of the first to third materials is different from each other.

Abstract: A preparation method of a glove having a soft coating with high wear resistance and high anti-slip performance is provided, including: physically spraying a bio-based organic polymer material on a surface of a glove core coated with an impregnation latex, conducting pre-vulcanization and high-temperature vulcanization successively, washing with an alkali liquor, an acid liquor, and water successively, and oven-drying to obtain the glove having the soft coating with high wear resistance and high anti-slip performance. The present disclosure has the following advantages: The preparation method is simple and reliable, and can greatly increase anti-slip performance and wear resistance of a coating while providing a delicate sand surface effect for the coating. The glove of the present disclosure has excellent anti-slip performance, durability, and comfortability in oily environments and dry environments.

Abstract: A box, a battery, and an electric apparatus are provided. The box has an accommodating cavity for accommodating a battery cell, and a top surface facing away from the accommodating cavity; a first region, a second region, and a sealing region located in between are formed on the top surface (of the box. The sealing region surrounds the first region, the sealing region is used for mounting a sealing member, and the second region is constructed with multiple mounting portions, the battery being mounted on an external apparatus through the mounting portions to make the sealing member in contact with the external apparatus. A shortest distance between a geometric center of an orthographic projection of the mounting portion in the second region and an outer edge of the sealing region is 30 mm-200 mm.

Abstract: An uncooled infrared polarization detection pixel structure, a chip, and a detector. By setting a light-passing region of a grating layer to a regular polygon corresponding to a polarization direction, it can be ensured that gratings (111) in the light-passing region that correspond to different polarization directions have the same shape except for the different polarization directions, thereby ensuring that the grating layer has the same transmission efficiency for incident light of multiple preset polarization directions.

Abstract: The present invention relates to the field of pharmaceutical synthesis. Disclosed is a long-lasting hepatitis virus entry inhibitor. The long-lasting hepatitis virus entry inhibitor of the present invention is used for preparing a pharmaceutical composition for treating diseases, the pharmaceutical composition being used for treating chronic hepatitis B and hepatitis D.

Abstract: A slip ring assembly includes: at least one first conductor group, and at least one second conductor group. Each first conductor group includes a first conductor and a second conductor, and the first conductor and the second conductor are configured as annular shapes, respectively. Each second conductor group includes a third conductor and a fourth conductor, the third conductor and the fourth conductor are configured as annular shapes, respectively. The first conductor, the second conductor, the third conductor and the fourth conductor are arranged to be apart from each other. A first current having a first phase and a first amplitude is configured to flow through the first conductor, a second current having a second phase and a second amplitude is configured to flow through the second conductor, a third current having a third phase and a third amplitude is configured to flow through the third conductor.

Abstract: Provided is a model training method, a data processing method and related apparatuses, relating to the technical fields of large model, image processing, and computer vision. The method includes: obtaining a historical process flow card set for spinning process; extracting a handwritten area from each historical process flow card; classifying the handwritten area to obtain a handwritten digit image block and a handwritten text image block; constructing a digit recognition model of different handwritten digit categories based on the handwritten digit image block, to extract a target digit from a newly-added process flow card; and constructing a text recognition model of different handwritten text categories based on the handwritten text image block, to extract a target text from the newly-added process flow card; wherein the target digit and the target text are used to construct a process flow database for the spinning process.