Abstract: The present disclosure discloses a volleyball passing training device, which includes an angle adjustment mechanism and a ball hoop arranged on the angle adjustment mechanism. The angle adjustment mechanism includes a connecting piece connected to the ball hoop, and a first connecting rod and a second connecting rod respectively hinged to the connecting piece. A sliding device which can slide or fix on the second connecting rod is arranged on the second connecting rod. The first connecting rod is hinged to the sliding device. Connecting lines of the hinge points between the first connecting rod and the connecting piece and between the second connecting rod and the connecting piece and the hinge point between the first connecting rod and the sliding device form a triangle.

Abstract: An information indicating method, an information determining method, a terminal and a base station are provided. The information indicating method includes: indicating, by using a predetermined parameter of a physical broadcast channel (PBCH) in a first system synchronization block (SSB), whether the first SSB includes associated remaining minimum system information (RMSI); or indicating, by using a predetermined parameter of a PBCH in a first SSB, that the first SSB does not include associated RMSI, and indicating frequency offset information of a synchronization raster where a second SSB is located, where the second SSB is an SSB with the associated RMSI.

Abstract: The present application provides a wireless communication method. One example method includes: sending, by a first device, a first transport block, where a size of the first transport block is determined based on a product of an initial size of the first transport block and a first parameter, the first parameter is determined based on one or more of the following parameters: a second parameter that indicates channel transmission quality corresponding to the first transport block; or a third parameter that indicates a channel transmission delay corresponding to the first transport block.

Abstract: Disclosed are a method and apparatus for determining an RA-RNTI. In the present application, a base station receives a random access preamble sent by a terminal; the base station determines an RA-RNTI according to a time-frequency resource occupied by the random access preamble, and the time-frequency resource is a time-frequency resource of an orthogonal frequency division multiplexing (OFDM) symbol level; and the base station sends a random access response message, and the random access response message includes downlink control information allocated, by the base station, for the terminal, and the downlink control information is scrambled using the RA-RNTI. By means of the present application, an RA-RNTI can be determined during a random access process of an NR system.

Abstract: Embodiments of this application provide a signal transmission method and a communications apparatus. The method includes: a terminal device receives information from a network device, wherein the information indicates the terminal device to send a signal in a fallback transmission mode; the terminal device determines that transmission of the signal is failed; and then sends the signal to the network device in the fallback transmission mode.

Abstract: A wireless communication method and apparatus are provided. One example method includes: receiving first PEI by a first terminal device, using, by the first terminal device, at least one of the first subgroup ID or the second subgroup ID.

Abstract: A dispersion-compensation microstructure fiber uses pure silica glass as the background material. It includes the core, the first-type defects, the second-type defects and the cladding. The air holes in the fiber cross section are arranged in the equilateral triangle lattice with the same adjacent air-hole to air-hole spacing. The core is formed by omitting 1 air hole. The first-type defects are formed by the 6 air holes locating at the vertices of hexagonal third-layer porous structure surrounding the core and their surrounding background material. The second-type defects are formed by the air holes in the first air-hole layer surrounding each first-type defect and their surrounding background material. The second-type defects act as the porous structure to surround the first-type defects and the fundamental defect modes, and can also combine with the first-type defects to act as the core of the second-order defect modes.

Abstract: Embodiments of the present disclosure generally relate to methods and apparatus for measuring and controlling local impedances at a substrate support in a plasma processing chamber during processing of a substrate. A substrate support includes a plurality of substrate support pins wherein the radio frequency voltage, current and phase of each of the plurality of substrate support pins are measured and impedances of the support pins are adjusted in real time. Each of the substrate support pins is coupled to an associated adjustable impedance circuit that may be remotely controlled. In one embodiment a variable capacitor is used to adjust the impedance of the impedance circuit coupled to the associated substrate support pin and may be remotely adjusted with a stepper motor.

Abstract: A hierarchical health index evaluation method for an intelligent substation includes: obtaining a basic health index of a device based on static information and dynamic information of the device; obtaining a device correlation based on a communication connection relationship between the device and another device, and correcting the basic health index of the device based on the device correlation to obtain a health index of the device; obtaining a layer-based health index of a layer based on a device health index and a device importance weight of the layer; obtaining a whole-station health index of an intelligent substation based on a layer-based health index of each layer and a sum of device importance weights of each layer; and regulating the intelligent substation based on a health index of each device in the intelligent substation, the layer-based health index of each layer, and the whole-station health index.

Abstract: A method and system for AR-based graded management education of laboratory safety risk are provided, which includes following steps: collecting laboratory image data and sensor data and obtaining a risk grade matching rule of a laboratory; identifying image feature data of the image data and sensor feature data of the sensor data, converting matched image feature data into a laboratory equipment name and converting matched sensor feature data into an equipment model; inputting the equipment name and a corresponding equipment model and quantity into the risk grade matching rule of the laboratory, and outputting a risk grade of a current laboratory according to the risk grade matching rule of the laboratory; and fusing and matching a AR template image corresponding to the identified and output risk grade and real image information according to preset AR template images for various risk grades, so as to output alarm information.

Abstract: The present invention belongs to the technical field of petroleum exploitation engineering, and discloses a 3D modeling method for pore-filling hydrate sediment based on a CT image. Indoor remolding rock cores or in situ site rock cores without hydrate can be scanned by CT; a sediment matrix image stack and a pore image stack are obtained by gray threshold segmentation; then, a series of pore-filling hydrate image stacks with different saturations are constructed through image morphological processing of the pore image stack such as erosion, dilation and image subtraction operation; and a series of digital rock core image stacks of the pore-filling hydrate sediment with different saturations are formed through image subtraction operation and splicing operation to provide a relatively real 3D model for the numerical simulation work of the basic physical properties of a reservoir of natural gas hydrate.

Abstract: The present disclosure provides a method and a device for sidelink communication. One example method includes: a terminal device receives a first PSSCH; the terminal device performs channel access on the shared spectrum, where the first PSSCH is associated with a plurality of PSFCH transmission resources on the shared spectrum, and the plurality of PSFCH transmission resources are located on at least one of reserved resources or dynamic resources on the shared spectrum; the terminal device transmits a first PSFCH using one PSFCH transmission resource of the plurality of PSFCH transmission resources, where the first PSFCH carries feedback information associated with the first PSSCH.

Abstract: The present disclosure provides a method and a device for sidelink communication. One example method includes: performing, by a terminal device, channel listening on a shared spectrum; and in response to a result of the channel listening being idle channels, transmitting, by the terminal device, a first sidelink channel by using a consecutive-slots transmission; wherein the consecutive-slots transmission comprises a transmission over a plurality of consecutive time slots, a first transmission block carried by the first sidelink channel includes transmission data corresponding to the plurality of consecutive time slots.

Abstract: A method, device, system, and storage medium for tracking a moving target are provided. The method uses three-dimensional radar observation data to construct a state vector and a motion model of the moving target, thereby to construct a state equation and an observation equation for achieving filtering and tracking within a linear Gaussian framework. The disclosure is also suitable for a moving target in a two-dimensional scene with a distance and an azimuth, and the disclosure use a two-dimensional observation vector to construct a dynamic system to achieving tracking of the moving target. The disclosure can be used in radar systems containing Doppler measurements, and tracking of moving targets can be implemented by performing dimension-expansion processing on observation equations.

Abstract: Provided are a communication method and a terminal device. The communication method includes: sending, by a first terminal device, a first sidelink channel to a second terminal device over a first sidelink, where the first sidelink channel includes first COT sharing information, and the first COT sharing information satisfies one or more of the following: the first COT sharing information is carried in a first PSSCH of the first sidelink channel; and the first COT sharing information includes second COT sharing information and third COT sharing information, with the second COT sharing information corresponding to a first communication mode, and the third COT sharing information corresponding to a second communication mode.

Abstract: A wireless communication method and apparatus are provided. One example method includes: receiving first PEI by a first terminal device, where the first PEI corresponds to at least one PO, and the first PEI is associated with first information, where the first information is used to indicate that a paging message in the at least one PO is a RAN-initiated paging message or a CN-initiated paging message.

Abstract: The present disclosure provides a method and a device for sidelink communication. One example method includes: a terminal device receives a first PSSCH; the terminal device performs channel access on the shared spectrum, where the first PSSCH is associated with a plurality of PSFCH transmission resources on the shared spectrum, and the plurality of PSFCH transmission resources are located on at least one of reserved resources or dynamic resources on the shared spectrum; the terminal device transmits a first PSFCH using one PSFCH transmission resource of the plurality of PSFCH transmission resources, where the first PSFCH carries feedback information associated with the first PSSCH.

Abstract: Disclosed are an aromatic amine derivative and an organic electroluminescent device including the same. A fluorenyl/silafluorenyl group having an ortho-substituted group is introduced into the structure of the aromatic amine derivative. The aromatic amine derivative may be used as a light-emitting material in a light-emitting layer of an organic electroluminescent device. These novel compounds can provide better device performance.

Abstract: A method and a device for wireless communication are provided. The method includes: a terminal device receiving first information sent by a network device, where the first information indicates a first timer, and the first timer has a first duration of performing small data transmission (SDT) using a first transmission resource, where the first duration is shorter than a second duration of a second timer, and the second duration is a duration related to a of SDT performed by the terminal device.

Abstract: The present disclosure provides a method and a device for paging. A network device sends paging indication information including identification information to a plurality of terminal devices corresponding to a same beam. A first terminal device of the plurality of terminal devices determines whether it is paged by the network device according to the identification information. In response to the first terminal device being paged by the network device, the first terminal device sends a paging response message to the network device.