Abstract: This application provides a negative electrode active material and a preparation method thereof. The negative electrode active material may be self-embedded graphite composed of graphite A and graphite B, where the surface of the graphite A may have a tenon structure, the surface of the graphite B may have a mortise structure, the tenon structure of the graphite A and the mortise structure of the graphite B may be mutually embedded, and a hydrogen bond may be formed between the tenon structure of the graphite A and the mortise structure of the graphite B.

Abstract: An airspace flow prediction method and device based on an ensemble learning algorithm are provided. The method includes the steps: collecting historical airspace flow data and related spatial structure data, and preprocessing; constructing a GNN model, and calculating an influence degree of each node and an influence degree between the nodes in an airspace network by using the GNN model, the node being any airport or any waypoint; performing, by the GNN model, feature conversion and attention fusion on the influence degree of the node, the influence degree between the nodes and time series data to acquire a fused feature vector; inputting the fused feature vector into an LSTM model to acquire a predicted airspace flow of the node; and applying the predicted airspace flow of the node to manage navigation of traffic in the airspace network.

Abstract: An interaction scene starting method includes displaying a play interface of a target video, the target video corresponding to a recorded play of a game; identifying a first interaction progress point of a virtual interaction scene of the game in the target video; obtaining scene interaction data corresponding to the first interaction progress point from a scene interaction server; and displaying a scene interaction image according to the scene interaction data and enabling playing the game from the first interaction progress point.

Abstract: A battery includes a positive electrode plate, a negative electrode plate, and a separator. The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer located on at least one side of the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material. The negative electrode active material includes graphite. A quantity proportion of secondary particles in the negative electrode active material is greater than or equal to 65%; an oil absorption value of the negative electrode active material is 40 mL/100 g to 65 mL/100 g; and a particle size by volume Dv1 of the negative electrode active material is 4 ?m to 8 ?m.

Abstract: A secondary battery and an electric apparatus are disclosed. The secondary battery includes a negative electrode plate including a negative electrode current collector and a negative electrode film layer with a thickness of H; a first surface away from the negative electrode current collector; and a second surface opposite the first surface. A first region of the negative electrode film layer includes a first active material with a thickness range from the second surface of the negative electrode film layer to 0.3H. The first active material comprises a first silicon-based material, which comprises secondary particles formed by aggregation of primary particles. A second region of the negative electrode film layer comprises a second active material with a thickness range from the first surface of the negative electrode film layer to 0.3H.

Abstract: This application provides a secondary battery and an electric apparatus. The secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector, and a negative electrode film layer that is provided on at least one surface of the negative electrode current collector and includes a negative electrode active material. The negative electrode active material includes a carbon-based material and a silicon-based material. The carbon-based material includes secondary particles formed by aggregation of primary particles. The silicon-based material includes secondary particles formed by aggregation of primary particles.

Abstract: A secondary battery and an electric apparatus are disclosed. The secondary battery includes a negative electrode plate including a negative electrode current collector and a negative electrode film layer with a thickness of H; a first surface away from the negative electrode current collector; and a second surface opposite the first surface. A first region of the negative electrode film layer includes a first active material with a thickness range from the second surface of the negative electrode film layer to 0.3H. The first active material includes a first carbon-based material and a first silicon-based material. The first carbon-based material includes primary particles. The first silicon-based material includes secondary particles formed by aggregating the primary particles. A second region of the negative electrode film layer includes a second active material and has a thickness range from the first surface of the negative electrode film layer to 0.3H.

Abstract: A secondary battery and an electric apparatus are disclosed. The secondary battery includes a negative electrode plate including a negative electrode current collector and a negative electrode film layer with a thickness of H; a first surface away from the negative electrode current collector; and a second surface opposite the first surface. A first region of the negative electrode film layer includes a first active material with a thickness range from the second surface of the negative electrode film layer to 0.3H. The first active material comprises a first silicon-based material, which comprises secondary particles formed by aggregation of primary particles. A second region of the negative electrode film layer comprises a second active material with a thickness range from the first surface of the negative electrode film layer to 0.3H.

Abstract: This application relates to a negative electrode active material. The negative electrode active material includes a core structure and a shell structure disposed around surface of the core structure, the core structure and the shell structure both have pores, and an average pore size of pores in the shell structure is greater than an average pore size of pores in the core structure. The negative electrode active material of this application can provide excellent kinetic performance under the condition of high compacted density. When used in a battery, this negative electrode active material can increase the energy density of the battery and achieve the objective of fast charging.

Abstract: Systems and methods are disclosed for air flow optimization. In certain embodiments, the technology is a system comprising sensors, injectors, actuators, and a system processor. In order to optimize the air flow, the system processor directs the injectors to expel aerosol particles into an environment, such that the aerosol particles can be measured by the one or more sensors. Flow intensity map generation is then used to map the aerosol particles and air flow is changed to optimize aerosol particle concentration using the actuators.

Abstract: Provided are a negative active material, a method for preparing same, a secondary battery containing same, and an electrical device. The negative active material includes a natural graphite substrate of a porous structure and a functional material distributed in pores of the natural graphite substrate, and the functional material includes amorphous carbon and a titanium-containing compound. The negative active material provided in this application exhibits excellent kinetic performance, and the secondary battery provided herein exhibits excellent fast-charging performance and cycle performance.

Abstract: A method for measuring flicker fusion threshold. Set a measurement scheme, including setting N 8-shaped digital frames in a background light area that flickers within a set frequency. Set ten groups of different frequency combinations being applied to the N 8-shaped digital frames. Assign each frequency in each group of the frequency combinations with a stroke of the 8-shaped digital frame. Randomly select, for each of the N 8-shaped digital frames, one from the ten groups of the frequency combinations. Determine the value of each frequency in each group of frequency combinations in the N groups of frequency combinations. Recognize, by the subject, the flickering digits on the N 8-shaped digital frames in the background light area within the set frequency range. Determine the range of the flicker fusion threshold or the final flicker fusion threshold of the subject according to the result that can be seen by the subject.

Abstract: Provided are a modified graphite and a preparation method thereof, a carbon-coated negative active material and a preparation method thereof, a negative electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device. The preparation method of a modified graphite includes the following steps: (S10) providing a graphite substrate; and (S20) heat-treating the graphite substrate in a micro-oxidizing atmosphere to obtain the modified graphite, where the micro-oxidizing atmosphere includes a reactive gas, and the reactive gas is one or more selected from CO2, O2, and O3. The preparation method of a carbon-coated negative active material includes the following steps: (S100) providing a negative active material substrate; and (S200) heat-treating the negative active material substrate and a carbonaceous precursor in a micro-oxidizing atmosphere to obtain the carbon-coated negative active material, where the micro-oxidizing atmosphere includes a reactive gas.

Abstract: This application provides a negative electrode active material and a preparation method thereof. The negative electrode active material may be self-embedded graphite composed of graphite A and graphite B, where the surface of the graphite A may have a tenon structure, the surface of the graphite B may have a mortise structure, the tenon structure of the graphite A and the mortise structure of the graphite B may be mutually embedded, and a hydrogen bond may be formed between the tenon structure of the graphite A and the mortise structure of the graphite B.

Abstract: A virtual scene interaction method is disclosed, including displaying a viewing page of a target cloud video, a play screen of a virtual scene being displayed in the target cloud video, the viewing page comprising N interaction triggering marks, an ith interaction triggering mark of the N interaction triggering marks being used for linking to an interaction progress point in the virtual scene, both i and N being positive integers, and i?N; and displaying, when the ith interaction triggering mark is selected, a control page for the virtual scene starting from the interaction progress point linked by the ith interaction triggering mark.

Abstract: An interaction scene starting method includes displaying a play interface of a target video, the target video corresponding to a recorded play of a game; identifying a first interaction progress point of a virtual interaction scene of the game in the target video; obtaining scene interaction data corresponding to the first interaction progress point from a scene interaction server; and displaying a scene interaction image according to the scene interaction data and enabling playing the game from the first interaction progress point.

Abstract: The invention discloses a terminal and an electronic device having the same. The terminal includes a connecting part, a mounting part, and a fixing part along an insertion direction, wherein the connecting part is adapted to be connected to a jump wire of an electronic component, the mounting part has an outer profile matching with at least a portion of an inner profile of an insertion hole in a base, for restricting displacement of the terminal after being inserted into the insertion hole, and the fixing part is adapted to be threadedly connected with the a fixing member so as to connect the fixing part to a circuit board.

Abstract: The present invention discloses a preparation method for a surface molding film of a PVC-based stone plastic composite board, including: surface activation treatment of the PVC-based stone plastic composite board: preparation of an activated putty, coarse roughening of a substrate surface, application and solidification of the activated putty, and fine roughening of the substrate surface; preparation of a PMMA slurry; and surface film forming of the PVC-based stone plastic composite board. The PVC-based stone plastic composite board coated with a PMMA film is obtained by cold pressing and shaping in a mold, tightening up a clamp, solidifying at low temperature, treating at high temperature, cooling and demolding.

Abstract: Systems and methods are disclosed for air flow optimization. In certain embodiments, the technology is a system comprising sensors, injectors, actuators, and a system processor. In order to optimize the air flow, the system processor directs the injectors to expel aerosol particles into an environment, such that the aerosol particles can be measured by the one or more sensors. Flow intensity map generation is then used to map the aerosol particles and air flow is changed to optimize aerosol particle concentration using the actuators.

Abstract: The invention discloses a terminal and an electronic device having the same. The terminal includes a connecting part, a mounting part, and a fixing part along an insertion direction, wherein the connecting part is adapted to be connected to a jump wire of an electronic component, the mounting part has an outer profile matching with at least a portion of an inner profile of an insertion hole in a base, for restricting displacement of the terminal after being inserted into the insertion hole, and the fixing part is adapted to be threadedly connected with the a fixing member so as to connect the fixing part to a circuit board.