Abstract: A server system receives a group operation request transmitted by a client. The group operation request is generated by the client in response to a trigger operation of a target group chat function, and includes a target identity and a target group chat function identifier. The server system determines a target group chat function use permission corresponding to the target identity. In accordance with a determination, based on the target group chat function use permission and the target group chat function identifier, that a user corresponding to the target identity has a permission to use the target group chat function, the server system transmits group operation result information to the client.

Abstract: A method, an apparatus for real-time multimedia communications using a software-defined network (SDN) are provided. The method includes receiving, in a periodic manner, a path metric associated with a first service node in the SDN and a second service node in the SDN, wherein the path metric comprises at least one of: a load status of at least one of the first service node or the second service node, or a transmission metric between the first service node and the second service node; and in response to receiving the path metric, updating a cascade network topology comprising an optimal path for transmitting multimedia data between a first edge node and a second edge node.

Abstract: A controlling method for an electronic device includes: determining an orientation of a laser projector; projecting a laser in a first mode by the laser projector when the laser projector is oriented toward a first side where the display screen is located; and projecting a laser in a second mode by the laser projector when the laser projector is oriented toward a second side opposite to the display screen, and the laser projected in the second mode has a greater energy than that of the laser projected in the first mode.

Abstract: A prelithiation device and a prelithiation method, are described. The prelithiation device comprises a first roller, a second roller, a third roller, and a first coating mechanism. The second roller is used to cooperate with the first roller to jointly roll a lithium ribbon to adhere the lithium ribbon to the second roller, the lithium ribbon comprising two first surfaces opposite each other in an axial direction of the second roller; the third roller is used to cooperate with the second roller to jointly roll an electrode plate to bond the lithium ribbon adhering to the second roller to the electrode plate; and the first coating mechanism is disposed upstream of the second roller and is configured to coat the first surfaces with a release agent.

Abstract: A mixing device includes a conveying part, a discharging pipe and a detecting part. The conveying part is internally provided with a plurality of conveying channels, and the plurality of conveying channels are used for correspondingly conveying various materials. The discharging pipe is internally provided with a mixing channel and connected to the conveying part, and each of the conveying channels communicates with the mixing channel. The detecting part is used for detecting a color of the mixed material obtained after the various materials are mixed in the mixing channel.

Abstract: A driving backplane, a manufacturing method thereof, a light-emitting substrate are provided. In the driving backplane, a first conductive layer on a substrate; a first organic film layer is between the first conductive layer and second conductive layer, the first organic film layer has first via holes; a first inorganic film layer is on one side of first organic film layer away from the substrate; the second conductive layer is on one side of first inorganic film layer away from first organic film layer, the second conductive layer and the first conductive layer are connected through the first via holes; orthographic projections of the first conductive layer and second conductive layer have an overlapping region, the overlapping region includes a region including orthographic projection of the first via holes, and a first region, an orthographic projection of the first inorganic film layer covers parts of the first region.

Abstract: This application relates to the artificial intelligence (AI) field, and specifically, to a voice quality enhancement method and a related device. The method includes: after a PNR mode is enabled, obtaining a noisy voice signal and target voice-related data, where the noisy-carrying voice signal includes a voice signal of a target user and an interfering noise signal, and the target voice-related data indicates a voice feature of the target user; and performing noise reduction on the noisy voice signal based on the target voice-related data by using a trained voice noise reduction model to obtain a noise-reduced voice signal of the target user, where the voice noise reduction model is implemented based on a neural network. In embodiments of this application, voice of a target person can be enhanced, and interference can be suppressed.

Abstract: Disclosed are a RISC-V and O-CFI mechanism-based defense method and apparatus for code reuse attacks, comprising: constructing a control flow graph according to program source codes randomized in a basic block order; on the basis of the control flow graph, obtaining a boundary range of a control flow transfer branch; executing the program source codes, obtaining a target node to which each control flow is to be transferred, and analyzing each target node in combination with the boundary range so as to defend against an abnormal control flow. The present invention can identify an illegal control flow transfer with the assistance of RISC-V security hardware according to the characteristics of a program control flow itself, and effectively handle code reuse attacks, thereby enhancing the security defense capabilities of an RISC-V system.

Abstract: A linear motion guide apparatus that is easily assembled is provided. The linear motion guide apparatus includes: two guide rails that are movable relative to each other in a longitudinal direction thereof via at least one rolling element; and a cage configured to hold the rolling element and hold a gear engaging with a meshing portion provided to at least one of the two guide rails. The cage includes: a first split body in which a rolling element holding portion that holds the rolling element and a gear holding portion that holds the gear are integrally formed; and a second split body in which a rolling element holding portion that holds the rolling element and a gear holding portion that holds the gear are integrally formed. The first split body and the second split body are joined to each other.

Abstract: The present disclosure provides a composition comprising a compound of formula (I) or a physiologically acceptable salt thereof, in which the compound of formula (I) or a physiologically acceptable salt thereof has a HPLC purity of ?90%; wherein R1, R2, X and n are as defined herein. The present disclosure further provides use of the composition according to the present disclosure for preparing and/or purifying a composition comprising a salt of the compound of formula (I), and a method for treating a disease caused by a Coronavirus which comprises administering the composition of the present disclosure to a subject. The composition of the present disclosure comprises the compound of formula (I) with high purity, and has good fluidity and anti-caking property; moreover, the claimed composition comprising the compound of formula (I)) with high purity is more suitable for preparing a composition comprising a salt of the compound of formula (I) with higher purity.

Abstract: The disclosure provides a method, an apparatus and a computer device for three-dimensional reconstruction of an indoor structure based on a two-dimensional video, wherein the method comprises: generating a color point cloud of three-dimensional structure of a house by using the video data of the house; regularizing the color point cloud of the house; extracting a plan of the house based on the color point cloud of the house; and constructing a three-dimensional model of the house in real life. The disclosure realizes autonomous and rapid construction of a three-dimensional model of a house by the general public, and realizes a low-cost, efficient and convenient three-dimensional visual digital representation of the house.

Abstract: The present invention discloses a flue gas low-temperature adsorption denitrification method, including: pressurizing a flue gas that has been subjected to dust removal and desulfurization, precooling the pressurized flue gas, cooling the precooled flue gas to a temperature lower than room temperature by a flue gas cooling system, flowing the flue gas at the temperature lower than room temperature into a low-temperature denitrification system, performing physical adsorption denitrification in the low-temperature denitrification system, precooling the flue gas that has been subjected to dust removal and desulfurization with the denitrificated flue gas, and flowing the heat-absorbed clean flue gas into a chimney to be discharged.

Abstract: Provided are a recombinant strain with modified gene BBD29_14900, and a method for constructing the same and use thereof, with the production of L-glutamic acid as a specific application. Further provided is a method for introducing a point mutation into the BBD29_14900 gene coding sequence in Corynebacterium or improving the expression thereof. The method can cause a bacterial strain with the mutation to increase the fermentation yield of glutamic acid. The point mutation involves a mutation of the base at position 1114 in the sequence of the BBD29_14900 gene from guanine (G) to adenine (A), and thus a substitution of aspartic acid at position 372 in the coded corresponding amino acid sequence with asparagine.

Abstract: A composite coating layer for coating a NdFeB rare earth magnet includes a first coating layer and a second coating layer formed over a surface of the first coating layer. The first coating layer includes a Nd coating layer, a Pr coating layer, or an alloy coating layer including two or more of Nd, Pr, and Cu. The second coating layer includes a Tb coating layer.

Abstract: Disclosed are a non-orthogonal multiple access (NOMA) multi-layer transmission method and an apparatus therefor. The method includes: a terminal determines a spread spectrum sequence group for NOMA multi-layer transmission, with the terminal being configured for NOMA multi-layer transmission, and the spread spectrum sequence group includes N spread spectrum sequences, the N spread spectrum sequences correspond to N data layers, the N spread spectrum sequences are mutually orthogonal, N is the number of data layers of NOMA multi-layer transmission, and N is an integer greater than 1; and the terminal sends data, the data comprising the N data layers using the spread spectrum sequence group for spectrum spreading.

Abstract: This application provides a folding assembly and a foldable electronic device. The folding assembly is applied to a foldable electronic device, and is configured to carry a flexible display screen. The folding assembly includes a shaft base, a first housing, and a second housing. The first housing and the second housing are respectively disposed on both sides of the shaft base. A door plate swing arm is located above the shaft base and is disposed on each of both sides of a center line of the shaft base, one end of each door plate swing arm is rotatably connected to the shaft base, and the other end of each door plate swing arm is rotatably connected to the first housing or the second housing.

Abstract: A recombinant strain with modified gene BBD29_11265 and a method for constructing the same are provided. The recombinant strain is a bacterium that generates L-glutamic acid, and has an improved expression of a polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof; the improved expression can be having a point mutation in, and an enhanced expression of the polynucleotide encoding an amino acid sequence of SEQ ID NO: 3 or a homologous sequence thereof. A genetically engineered bacterium in which the base at position 70 in the BBD29_112665 gene sequence is mutated to adenine from guanine, causing alanine at position 24 in the coded corresponding amino acid sequence to be substituted with threonine, and an engineered bacterium overexpressing the BBD29_112665 gene or BBD29_11265G70A gene are constructed in the present invention, facilitating an increase in the production and conversion rate of L-glutamic acid.

Abstract: The present disclosure relates to an electronic device and its execution method and a computer-readable medium. An electronic device, comprising: a memory having instructions stored thereon; a processor configured to execute instructions stored on the memory to cause the electronic device to perform the following operations: analyzing an original video stream being played to determine start time and duration of a first video stream part to be replaced in the original video stream; retrieving a second video stream part with the same duration; playing the second video stream part in a front end at the determined start time to play the original video stream in a backend; and playing the original video stream in the front end after finishing playing the second video stream part.

Abstract: Embodiments of the disclosure relate to an optical fiber ribbon. The optical fiber ribbon includes a plurality of optical fibers arranged adjacently to each other and a plurality of bonding regions intermittently spaced along a length of the optical fiber ribbon. At each bonding region, at least one bond is formed between two optical fibers of the plurality of optical fibers. Further, the at least one bond comprises a first material applied to outer surfaces of the two optical fibers and a second material applied over the first material. The first material is different from the second material, and at least one of the first material or the second material includes a colorant configured to identify the optical fiber ribbon. Also disclosed are embodiments of making such an optical fiber ribbon as well as of optical fiber cables including such an optical fiber ribbon.

Abstract: A shielding structure for a system-in-package includes a substrate having stacked first ground planes in the substrate, a second ground plane on a surface of the substrate, and a ground pad arranged along an edge of the substrate disposed on the second ground plane. In addition, ground holes disposed in the substrate electrically couple the adjacent ground planes. The ground holes are arranged in a ring around a board body and spacing between the adjacent ground holes is less than a specified distance in an arrangement that defines a Faraday cage. A device is disposed on the opposing surface of the substrate and a package layer is disposed on the device.