Abstract: A gesture recognizing method, an interactive method, a gesture interactive system, an electronic device, and a non-transitory computer-readable storage medium are disclosed. The gesture recognizing method includes: acquiring a plurality of groups of images taken respectively at different photographing moments for a gesture action object, wherein each group of images includes at least one pair of corresponding depth map and grayscale map; and according to the plurality of groups of images, obtaining spatial information by using the depth map in each group of images, and obtaining posture information for the gesture action object by using the grayscale map in each group of the images, to recognize a dynamic gesture change of the gesture action object. The gesture recognizing method reduces the processing time as a whole, can quickly obtain gesture recognition results, reduce the system resource occupation, and ensure the real-time gesture interaction.

Abstract: A video processing method, apparatus, and device, and a storage medium are provided. The method includes: firstly, determining a target video template, the target video template including a correspondence between a video editing track and a field having a tag; then, obtaining a material to be filled, the material to be filled including data to be filled having a tag; and further, performing matching between the tag of the data to be filled and the tag of the field in the target video template, and filling the data to be filled corresponding to a successfully matched tag into the field having the tag in the target video template to obtain a first video.

Abstract: The present disclosure provides an impact hydroforming mold and an impact hydroforming method with integration of blank holder and feeding, belonging to the technical field of metal forming. The hydroforming mold includes: a lower concave mold, a blank holder ring, and a working sleeve assembly. A working sleeve has a liquid chamber for containing liquid medium and a stamping acceleration channel; a throttling flow channel is formed between working sleeve and blank holder ring; the liquid medium can be throttled and depressurized through the throttling flow channel and then contacted with side face of the sheet. Under the action of intensity of pressure, the edge of the sheet pressed by the blank holder ring can be allowed in a mutually adaptive way to realize feeding in a downward forming process when the middle area of the sheet suffers impact, so forming quality of a target component can be effectively improved.

Abstract: A method for intelligently controlling a mechanical arm includes building a twin model of a mechanical arm, and extracting a state parameter and an action parameter corresponding to task characteristics from the twin model; determining a reward function corresponding to the task characteristics; training a twin delayed deep deterministic policy gradient (TD3) reinforcement learning model; simulating in the twin model based on a physical state parameter of the mechanical arm by using the TD3 reinforcement learning model, to obtain a controllable parameter; and controlling the mechanical arm to execute a corresponding task by using the controllable parameter. The TD3 reinforcement learning model is built based on the state parameter and the action parameter corresponding to the task characteristics and the reward function corresponding to the task characteristics, which can adapt to a dynamically changing environment and requirements for multiple tasks.

Abstract: The present disclosure is directed synthetic methods for the preparation of 4-valyloxybutyric acid. The synthetic methods described herein employ a diverse array of protecting group strategies and reaction conditions. Additionally, the present disclosure is directed to compounds useful as synthetic intermediates in the preparation of 4-valyloxybutyric acid.

Abstract: A detection method and detection apparatus for a wind driven generator, and a computer-readable storage medium, a computer device and a detection system for executing the method.

Abstract: The application relates to an efficient particle filter node positioning method for ocean sensor networks, including the following steps: 1) obtaining a first state vector of mean value of posterior probability at k?1 moment; 2) establishing the state model of the nonlinear system; 3) obtaining the observation model of the nonlinear system; 4) propagating particles, and calculating the state vector ?+k at the next moment according to the particle vector at k?1 moment; 5) obtaining the observed value and calculating the weight; 6) judging whether it is degraded, if not, the weight is used to calculate the position expectation, otherwise, 7) is executed; 7) modifying small-weight particles; 8) resampling the improved residual and normalizing the weights; and 9) using the weight of 8) to calculate the position expectation and realize node positioning.

Abstract: The invention belongs to the field of insulating materials, in particular cable insulating materials, and particularly relates to a modified flexible polypropylene insulating material, and preparation method and use thereof. The modified flexible polypropylene insulating material comprises a propylene-based continuous phase, and a rubber phase and a grafted phase derived from an unsaturated bond-containing polymerizable monomer dispersed in the propylene-based continuous phase; wherein, the modified flexible polypropylene insulating material has a content of xylene solubles of 10-55 wt %, preferably 15-45 wt %, more preferably 18-40 wt %, and still more preferably 20-40 wt %, based on the total weight of the modified flexible polypropylene insulating material; the content of structural units derived from the unsaturated bond-containing polymerizable monomer and in a grafted state in the modified flexible polypropylene insulating material is 0.3-6 wt %, and preferably 0.

Abstract: A display substrate, a display panel, and a display apparatus. The display substrate includes a base substrate; a gate line extending in a first direction on the base substrate; and a transistor located on the base substrate, where the transistor includes a gate electrode and a first electrode that is located at a side of a layer where the gate electrode is located away from the base substrate, part of the gate line is used as the gate electrode, an orthogonal projection of the gate electrode on the base substrate in a second direction is located within an orthogonal projection of the first electrode on the base substrate in the second direction, and the second direction intersects with the first direction.

Abstract: An electrolyte additive, an electrolyte and a lithium ion secondary battery including same are provided.

Abstract: Aspects of the disclosure provide a first lens. The first lens can include an optically transparent member having a first surface and a second surface. The optically transparent member can be configured to receive light from a display device via the first surface. The received light exits the optically transparent member through the second surface. The first surface and the second surface of the optically transparent member can be aspheric. An in inner surface of the first surface is convex, and an outer surface of the first surface is concave. The inner surface is surrounded by the outer surface of the first surface. A thickness of a central region of the first lens can decrease from a center of the first lens, and a thickness of a peripheral region of the first lens can increase from a boundary of the central region.

Abstract: Methods, systems, and devices for wireless communications are described for closed-loop precoding for multiple-input multiple-output for transmitter circle arrays, for example uniform circular array panels. In some aspects, a base station including a transmitter circle array may steer a beam to a user equipment (UE) using codebooks, quantization rules, and feedback from the user equipment. In some aspects, the same transmitter circle array may be used for both backhaul communications with a device at a fixed location, for example using beams formed via discrete Fourier transform (DFT) vectors, and access communications with a UE via non-DFT beams coded using closed-loop precoding.

Abstract: Methods, systems, and devices for wireless communications are described. A first wireless node may transmit, to a second wireless node, an indication of an orbital angular momentum (OAM) base value that is associated with one or more OAM modes. The OAM base value may correspond to a number of antenna elements of an antenna ring at the first wireless node, and for each of the one or more OAM modes. Based on the OAM base value, the first wireless node may communicate reference signaling according to the one or more OAM modes using the number of antenna elements of the antenna ring. The second wireless node may use a same number of antenna elements based on the indicated OAM base value.

Abstract: A method for digital twin virtual-reality synchronization mapping of a mechanical arm comprises acquiring a virtual mechanical arm model built based on an actual mechanical arm in a virtual environment, where the virtual mechanical arm model is configured to map the actual mechanical arm; acquiring real motion information collected when the actual mechanical arm moves; constructing a training set and a test set based on the real motion information; training a target multilayer perceptron model based on the training set, and testing the target multilayer perceptron model based on the test set, where the target multilayer perceptron model is configured to predict a motion of the virtual mechanical arm model in the virtual environment; and deploying the target multilayer perceptron model on the actual mechanical arm when the target multilayer perceptron model meets a preset condition. According to this method, operation accuracy and efficiency of the mechanical arm are improved.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, a first channel occupancy time (COT) sharing request. The UE may transmit, to a third UE, after a time window has elapsed, a second COT sharing request, wherein the second COT sharing request is transmitted based at least in part on the first UE having received no response to the first COT sharing request within the time window or the first UE having received a negative response to the first COT sharing request within the time window. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A first device may select, from multiple orbital angular momentum (OAM) modes, a set of one or more primary OAM modes and a set of one or more secondary OAM modes, where at least one primary OAM mode is activated periodically and at least one secondary OAM mode is activated based on a trigger. The first device may transmit, to a second device, a message indicating a configuration for the selected set of one or more primary OAM modes, the selected set of one or more secondary OAM modes, and discontinuous reception (DRX) parameters for each of the sets of OAM modes. The second device may monitor for a signal using a primary OAM mode using the DRX parameters for the set of primary OAM modes, and the second device may activate a second OAM mode based on receiving the signal.

Abstract: In a communication system having a primary wireless communication network and one or more secondary wireless communication network, a primary base station (PBS) of the primary wireless communication network may share a wireless spectrum thereof to one or more secondary base stations (SBSs) of the one or more secondary wireless communication network by dividing the wireless spectrum into a plurality of time-frequency blocks, and sending usage information of at least a portion of the plurality of time-frequency blocks from the PBS to the one or more SBSs for the SBSs to use available time-frequency blocks of the plurality of time-frequency blocks for their communication.

Abstract: A composition, formulation, preparation method and use for a glutathione precursor. The composition comprises, in parts by weight: a selenium-containing compound; a glutathione precursor; a zinc-containing compound. A powder obtained by mixing the present composition has good mixing uniformity and good fluidity, and facilitates filling in a filling capsule; and a capsule containing the composition has the effects of liver protection, oxidation resistance, and immunity enhancement.

Abstract: A data transmission method for a virtual reality system, the data transmission method including: performing, by a first processor, image sampling on an image to be transmitted to obtain a first image; performing, by the first processor, image sampling on the image to be transmitted to obtain a second image; transmitting, by the first processor, the first image and the second image to a virtual reality apparatus; receiving the first image and the second image by the virtual reality apparatus and processing the first image and the second image by the virtual reality apparatus to obtain an image to be displayed; and displaying the image to be displayed by the virtual reality apparatus.

Abstract: A system and a method for evaluating transmission performance related to a network node, and a related device are disclosed. The system includes a network node and a control node. The network node is configured to obtain a test packet, and process the test packet by using a virtual switch, to generate a mirrored packet corresponding to the test packet. The mirrored packet carries a generation timestamp and generation location information. The control node is configured to receive the mirrored packet from the network node, to evaluate, based on the mirrored packet, transmission performance of at least a part of link that is related to the network node and that is in a path. The control node obtain transmission performance of the network node in the path and the transmission performance of at least a part of link that is related to the network node.