Abstract: A data processing method and device are provided. The data processing method includes acquiring hot keys read from a log structure merge (LSM) tree within a preset duration, determining a total size of the read hot keys, and adjusting a size of each of a plurality of levels of the LSM tree based on the total size of the read hot keys.

Abstract: A composite polyester hot-melt adhesive, a preparation method thereof and a preparation method of an anti-scouring geotextile are provided. The preparation method of the composite polyester hot-melt adhesive includes the following steps: performing an esterification reaction on a dibasic acid and a dihydric alcohol under a protection of nitrogen and an action of a titanium/cobalt composite catalyst, adding a stabilizer for a polycondensation reaction to obtain a polyester hot-melt adhesive, then adding polymethyl methacrylate (PMMA) microspheres for mixing and stirring to obtain the composite polyester hot-melt adhesive. The anti-scouring geotextile is obtained by bonding a polyethylene terephthalate woven fabric with a polypropylene geotextile by the composite polyester hot-melt adhesive.

Abstract: Provided are a compaction method and device for Sorted String Table (SST) files stored in zones of a Zoned Namespace Solid State Drive. The method includes: determining compaction priorities of a first plurality of SST files in a first level of a LSM-Tree based on attribute information of a first plurality of zones corresponding to the first plurality of SST files and a second plurality of SST files in a second level of the LSM-Tree, wherein the second level is adjacent and higher to the first level, a key range of the first plurality of SST files overlaps key ranges of SST files in the second level, and a key range of the second plurality of SST files overlaps key ranges of the first plurality of SST files. The method includes performing a compaction operation on an SST file having a highest compaction priority among the first plurality of SST files.

Abstract: A method for a three-dimensional temperature and salinity field, including: based on multi-source marine environmental data, analyzing the spatiotemporal distribution characteristics of marine dynamic environmental elements, and studying the characteristics of the temperature-salinity relation; on the basis of analysis of the spatiotemporal characteristics and study of the characteristics of the temperature-salinity relation, establishing a statistical prediction model of marine environmental dynamic elements by a spatiotemporal empirical orthogonal function method; based on the observation data of temperature and salinity obtained by the marine transportation platform, correcting a marine environment forecast field around the marine transportation platform by using a realtime analysis technology of a marine environment field; and adjusting the salinity using a temperature-salinity relation curve after the temperature and salinity are forecasted.

Abstract: The present disclosure provides a device for controlling the shape of an aerosol particle condensation growth flow field through an electromagnetic field. The device includes an aerosol growth device and a power supply. The aerosol growth device includes a porous medium, magnetic rubber and an electromagnet group. The magnetic rubber is sleeved in an inner cavity of the electromagnet group, and the porous medium is sleeved in an inner cavity of the magnetic rubber. The magnetic rubber is clung or clings to the porous medium, and the power supply is connected with the electromagnet group. The present disclosure also provides a method for controlling the shape of the aerosol particle condensation growth flow field through the electromagnetic field.

Abstract: A method of processing a video frame, an electronic device, and a storage medium, which relate to a field of an artificial intelligence technology, in particular to fields of computer vision and deep learning technologies, and may be applied to image processing, image recognition and other scenarios. A specific implementation solution includes: determining an enhancement configuration information in response to an image enhancement request for an initial video frame, wherein the enhancement configuration information includes an information related to adjusting a current attribute value of at least one image attribute of the initial video frame to a target attribute value, and adjusting, by using an image enhancement tool, the current attribute value of the at least one image attribute of the initial video frame according to the enhancement configuration information, so as to obtain a target video frame, wherein the image enhancement tool supports an encryption function.

Abstract: A method for data storage includes determining an expected expiration time of a new data file based on attribute information of the new data file and recorded attribute information of data files, in response to creation of the new data file in a level of a Log-Structured Merge Tree (LSM-Tree). Additionally, a block set corresponding to the expected expiration time is allocated for the new data file in a storage device. The recorded attribute information of the data files indicates a level where each of the data files is located, key information of each of the data files, and lifetime information of each of the data files. The data files that have been created comprise unexpired data files or both unexpired data files, and expired data files that expired within a preset period before creation time of the new data file.

Abstract: A computing system includes an automatic optical inspection (AOI) and a database that stores images of a plurality of visual inspection (VI) training boards. Each of the visual inspection (VI) training boards includes at least one intended defect. The AOI system includes an artificial intelligence (AI) algorithm implemented in an automatic optical inspection (AOI) system. The AOI system trains the AI algorithm to learn at least one target defect based on the at least one intended defect including in the plurality of VI training boards, analyzes a production printed circuit board (PCB), and determines either a non-defective PCB in response to the AI algorithm determining the production PCB excludes the at least one target defect, or a defective PCB in response to the AI algorithm determining the production PCB includes at least one target defect.

Abstract: A method for processing a feature image includes: grouping parameters in a parameter matrix to obtain a plurality of arrays; the parameter matrix being a matrix converted and obtained from a convolutional layer in a convolutional neural network; performing thinning processing on the parameter matrix according to parameter values in the plurality of arrays to obtain a thinned parameter matrix; performing calculation by using the thinned parameter matrix and a data matrix to determine an output feature map corresponding to the convolutional layer in the case where a sparsity of the thinned parameter matrix satisfies a predetermined condition; the data matrix including a matrix converted and obtained from an input feature map inputted into the convolutional layer.

Abstract: Disclosed is a digital twin tethered balloon system; key running state data of a tethered balloon is collected through an Internet of Things of a tethered balloon system; the key running state data of the tethered balloon is transmitted to a twin data service center; the twin data service center receives, analyzes and stores the data and forwards the data to a tethered balloon digital twin system; the tethered balloon digital twin system simulates a pose of a tethered balloon body and the movement of a ground tethering facility; and the tethered balloon monitoring service provides running state monitoring, quality problem tracking, fault prediction and early warning, automatic control and other services.

Abstract: Disclosed a digital twin tethered balloon system key running state data of a tethered balloon is collected through an Internet of Things of a tethered balloon system; the key running state data of the tethered balloon is transmitted to a twin data service center; the twin data service center receives, analyzes and stores the data and forwards the data to a tethered balloon digital twin system; the tethered balloon digital twin system simulates a pose of a tethered balloon body and the movement of a ground tethering facility; and the tethered balloon monitoring service provides running state monitoring, quality problem tracking, fault prediction and early warning, automatic control and other services. The present invention realizes the deep integration of a physical space and a digital space of the tethered balloon system, which can monitor the tethered balloon system, and is high in visualization degree and good in interaction means.

Abstract: Provided is a method for matching a virtual scene of a remote scene with a real scene for augmented reality and mixed reality. Multiple coordinate systems are established and a position relationship between the multiple coordinate systems is determined. A position of a point cloud scene in the near-side environmental space and the position of the near-side virtual scene are determined in the near-side environmental space through real marks, so as to realize the high-precision matching and positioning for augmented reality and mixed reality. Based on the position of objects marked in the real space, the method realizes adaptive and accurate positioning of the virtual objects in the augmented reality and mixed reality by overcoming spatial barriers. The scene in the virtual space is accurately superimposed into the near-side environmental space.

Abstract: A vehicle loss assessment method executed by a mobile terminal, a device, a mobile terminal, a medium and a computer program product are provided. The implementation solution includes: acquiring at least one input image; detecting vehicle identification information in the at least one input image; detecting vehicle damage information in the at least one input image; and determining a vehicle loss assessment result on the basis of the vehicle identification information and the vehicle damage information.

Abstract: A method for automatically generating hierarchical exploded views based on assembly constraints and collision detection, in which parts to be exploded are layered in explosion sequence according to a design result of the 3D assembly process planning, and the parts to be exploded in each layer are grouped based on the type and the disassembly direction; a feasible explosion direction of the parts in each layer is determined according to assembly constraints and collision detection; the explosion sequence and explosion direction of the parts in each layer are determined; and then the layered explosion is performed at a certain distance. Ball markers and a part-list are generated after all the parts are exploded.

Abstract: Provided is a method for matching a virtual scene of a remote scene with a real scene for augmented reality and mixed reality. Multiple coordinate systems are established and a position relationship between the multiple coordinate systems is determined. A position of a point cloud scene in the near-side environmental space and the position of the near-side virtual scene are determined in the near-side environmental space through real marks, so as to realize the high-precision matching and positioning for augmented reality and mixed reality. Based on the position of objects marked in the real space, the method realizes adaptive and accurate positioning of the virtual objects in the augmented reality and mixed reality by overcoming spatial barriers. The scene in the virtual space is accurately superimposed into the near-side environmental space.

Abstract: A method for automatically generating hierarchical exploded views based on assembly constraints and collision detection, in which parts to be exploded are layered in explosion sequence according to a design result of the 3D assembly process planning, and the parts to be exploded in each layer are grouped based on the type and the disassembly direction; a feasible explosion direction of the parts in each layer is determined according to assembly constraints and collision detection; the explosion sequence and explosion direction of the parts in each layer are determined; and then the layered explosion is performed at a certain distance. Ball markers and a part-list are generated after all the parts are exploded.

Abstract: The present invention discloses a system for preventing network content of one or more network servers from being tampered with. The system comprises a content caching and providing device to cache network content of the one or more network servers; and a content monitoring sub-system with one or more content monitoring client incorporated in the network servers respectively and a content monitoring server part incorporated in the content caching and providing device. The present invention further discloses a content caching and providing device, a network content providing system and a corresponding method. With the system, device and method according to the present invention, we can improve the speed and security of accessing network content while effectively preventing the network content from being tampered with.