Abstract: The present invention provides a single-crystal high-nickel positive electrode material and a preparation method therefor and an application thereof. The preparation method comprises the following steps: (1) mixing a precursor, a lithium source, and a nano oxide, and performing primary sintering treatment in an oxygen-containing atmosphere to obtain a primary sintered material; and (2) mixing the primary sintered material obtained in step (1) with a titanium source and a cobalt source, and performing secondary sintering treatment in an oxygen-containing atmosphere to obtain the single-crystal high-nickel positive electrode material. The present invention uses a Ti/Co co-coating method, the residual alkali amount of the prepared single-crystal high-nickel positive electrode material can be greatly reduced, and the capacity and the rate capability can also be kept at a high level, so that the technological process is reduced, and the cost is reduced.

Abstract: A composite material and a preparation method therefor and a lithium-ion battery positive electrode material. The preparation method for the composite material comprises the following steps: performing first calcination treatment on a mixture of a manganese source, a nickel source, a lithium source and a cobalt source to obtain cobalt-doped lithium nickel manganese oxide; and performing second calcination treatment on a mixture of the cobalt-doped lithium nickel manganese oxide and silicon dioxide.

Abstract: A processor-implemented method with molecular dynamics simulation includes: setting a precision of first data used for a molecular dynamics simulation to be a first precision; setting a precision of second data used for the molecular dynamics simulation to be a second precision that is different from the first precision; and conducting the molecular dynamics simulation based on the first data of the first precision and the second data of the second precision.

Abstract: A photographing device for a vehicle and relates to the field of automatic driving technology is disclosed. The specific solution is that the photographing device includes a seat; a camera mounted on the seat; a lens holder mounted on the seat and rotatable relative to the seat; a transparent lens mounted on the lens holder and arranged opposite to the camera; and a driving assembly connected with the lens holder to drive the lens holder to rotate relative to the base.

Abstract: The present invention relates to the field of product quality analysis, and specifically, a test kit and detection method for testing isothiazolinone in textiles. A pretreatment step of the present invention adopts a unique process, which may fully transfer isothiazolinone to an acetone and water mixed solution, so that a more accurate measurement result can be achieved. The testing method of the present invention dose not add indicators, does not use large-scale analysis instruments, and is accurate in measurement, easy in reaction termination determination, high in accuracy, low in cost, and strong in popularization and application.

Abstract: An electrochemical device, including a cathode, an anode and an electrolyte. The anode includes an anode current collector and an anode active material disposed on the anode current collector, the electrolyte includes fluoroethylene carbonate, and the electrochemical device meets the following relationship: 17.55?K1?K2?1.63K32+11.27K3?20.80, where K1 represents a specific surface area value of the unit mass of the anode active material (in m2/g), and 1.0?K1?2.0; K2 represents a content value of the fluoroethylene carbonate required by per Ah capacity (in g/Ah), and 0.05?K2?0.25; and K3 represents a weight value of the anode active material required by per Ah capacity (in g/Ah).

Abstract: The disclosed embodiments provide a system that performs molecular assembly. During operation, the system delivers one or more droplets of a fluid onto a surface using a nanofluidic delivery probe and an associated high-precision positioning device, wherein the solution comprises a solvent and one or more solute molecules, and wherein delivery of the droplets onto the surface facilitates evaporation-driven assembly of one or more structures on the surface. Moreover, while delivering a droplet onto the surface, the system controls a size of the droplet and a shape of the droplet during evaporation to produce a variety of shapes in resulting structures.

Abstract: A method for checking a medium-term and long-term maintenance plan of a power grid. A predicted load value and one or more historical load values of a power grid are acquired and clustered through a clustering algorithm, and a historical moment at which a historical load value is in a same cluster as the predicted load value and has a largest load value is selected as a target historical moment. A power grid operation mode model at the target historical moment is acquired, and the power grid operation mode model is updated according to the maintenance plan and open loop point information by using a full wiring approach to obtain a future-state power grid operation mode model. Ground state power flow data of the power grid are calculated based on the operation mode model, and safety check is carried out according to a preset ground state power flow limit.

Abstract: A method for calibrating a Lidar and a positioning device, a device, and a storage medium. The method includes: acquiring a point-cloud data sequence of the Lidar and a pose data sequence of the positioning device, in which, the Lidar and the positioning device are on a same traveling device; determining first trajectory information of the Lidar and second trajectory information of the positioning device according to the point-cloud data sequence and the pose data sequence; and determining a calibration offset between the Lidar and the positioning device according to the first trajectory information and the second trajectory information, in which, a matching degree between the first trajectory information and the second trajectory information satisfies a preset matching degree condition under a trajectory information correspondence determined based on the calibration offset.

Abstract: A registration method and a registration apparatus for an autonomous vehicle is provided. The method includes: generating a first trajectory curve based on first detection poses of a vehicle-mounted camera at a plurality of first time points, generating a second trajectory curve based on second detection poses of a vehicle-mounted positioning device at a plurality of second time points, aligning the first trajectory curve with the second trajectory curve based on the first detection poses and the second detection poses, and registering the vehicle-mounted camera and the vehicle-mounted positioning device based on the first trajectory curve and the second trajectory curve aligned with each other.

Abstract: A lidar map-based loop detection method, an electronic device, and a storage medium, which are related to a field of intelligent transportation and a technical field of automatic driving. The specific implementation include: acquiring an eigenvector of each grid in each sub-map of N sub-maps of the lidar map; determining a target eigenvector of each grid in each sub-map of the N sub-maps according to the eigenvector of each grid in each sub-map of the N sub-maps; constructing histograms of the N sub-maps according to the target eigenvector of each grid in each sub-map of the N sub-maps; and determining that a loop relation exists between two target sub-maps in the N sub-maps, in case that a similarity of histograms of the two target sub-maps is greater than a preset threshold value.

Abstract: A photographing device for a vehicle and relates to the field of automatic driving technology is disclosed. The specific solution is that the photographing device includes a seat; a camera mounted on the seat; a lens holder mounted on the seat and rotatable relative to the seat; a transparent lens mounted on the lens holder and arranged opposite to the camera; and a driving assembly connected with the lens holder to drive the lens holder to rotate relative to the base.

Abstract: A lidar base, a lidar device and an autonomous vehicle are provided, and relate to the technical field of automatic driving. Wherein, the lidar base includes: a seat body for installing a lidar assembly; a cover plate arranged on the seat body, and a diversion gap being defined between the cover plate and the base body, wherein an air outlet of the diversion gap is arranged toward the lidar assembly.

Abstract: Embodiments provide a method for constructing a future-state power grid model and device, including that: a current power grid model, an equipment power-off plan, an equipment retirement plan and an equipment addition plan are acquired; then, equipment is added according to the current power grid model, and an added equipment information set, a retired equipment information set and a powered-off equipment information set are determined according to the equipment addition plan, the equipment retirement plan and the equipment power-off plan respectively; and finally, a state of the added equipment is set to be an operating state, an initial network model of each period is formed according to a time sequence, and a future-state network model is constructed according to the added equipment information set, the retired equipment information set, the powered-off equipment information set and the initial network models. The embodiments further provide construction equipment and a storage medium.

Abstract: Embodiments provide a method for constructing a future-state power grid model and device, including that: a current power grid model, an equipment power-off plan, an equipment retirement plan and an equipment addition plan are acquired; then, equipment is added according to the current power grid model, and an added equipment information set, a retired equipment information set and a powered-off equipment information set are determined according to the equipment addition plan, the equipment retirement plan and the equipment power-off plan respectively; and finally, a state of the added equipment is set to be an operating state, an initial network model of each period is formed according to a time sequence, and a future-state network model is constructed according to the added equipment information set, the retired equipment information set, the powered-off equipment information set and the initial network models. The embodiments further provide construction equipment and a storage medium.