Abstract: A positioning method and device, the method including: extracting multiple light spots from a current image frame, wherein the current image frame is an image currently collected by an extended reality device; determining an interference light spot in the multiple light spots according to information about a historical interference light spot, and removing the interference light spot in the multiple light spots, recognizing whether there is a light spot of a luminous light source in remaining light spots after removing the interference light spot, wherein the luminous light source is a light source set on a human-computer interaction apparatus, and the human-computer interaction apparatus is used for a user to interact with the extended reality device; determining a current pose of the human-computer interaction apparatus according to the light spot of the luminous light source recognized in the remaining light spots.

Abstract: An optical module includes a circuit board, a light emitting device and a data processor. The data processor is disposed on the circuit board. The data processor includes a reverse gearbox and a gearbox. The reverse gearbox is connected to the light emitting device, and is configured to receive a high-speed electrical signal from the circuit board, and decode the high-speed electrical signal into a plurality of channels of low-speed electrical signals. The plurality of channels of low-speed electrical signals drive the light emitting device to emit the plurality of channels of optical signals. The gearbox is connected to the light receiving device, and is configured to receive a plurality of channels of low-speed electrical signals output by the light receiving device, encode the plurality of channels of low-speed electrical signals into a high-speed electrical signal, and transmit the high-speed electrical signal to the circuit board.

Abstract: A data transmission method and apparatus applied to the wireless communications field, where the method includes receiving, by a first access point (AP), cooperation configuration information from a second AP, where the cooperation configuration information of the second AP indicates basic cooperation information of the second AP to the first AP, and triggering, by the first AP based on a quantity of spatial streams allocated through cooperation, at least one cooperation station (STA) associated with the first AP to perform uplink data transmission using a quantity of spatial streams allocated by the first AP.

Abstract: Embodiments of this specification provide a retrieval method and apparatus for a graph database. The graph database stores a first graph. The first graph includes a plurality of nodes and an edge connecting the plurality of nodes. The plurality of nodes include a first node. The method includes: obtaining a first identifier corresponding to the first node; obtaining a storage location of first property information from a pre-established inverted index based on at least the first identifier, where the first property information is property information of the first node or property information of a first edge whose endpoint is the first node, and at least the first identifier and the storage location of the first property information are stored in the inverted index in an associated manner; and obtaining the first property information based on the storage location.

Abstract: A system and method for adaptive color assignments to image labels during annotation of datasets includes preparing a dataset for image labeling by an annotator by: leveraging a global color analyzer to perform a global color distribution of a plurality of images to identify one or more overall colors present in the plurality of images, and a local color analyzer to perform a local color distribution for each image to identify one or more colors present in an area of interest of the image, and selecting a plurality of candidate colors to be used as image labels by the annotator, based on an output of the global color analyzer and an output of the local color analyzer.

Abstract: Disclosed is a prefabricated laminated slab made in accordance with a pretensioning fibermesh anti-cracking process and a manufacturing method thereof, and belongs to the technical field of fabricated structure engineering. The prefabricated laminated slab comprises a concrete layer, fiber grids, distribution bars and truss bars. The fiber grids are subjected to prestress tensioning and pouring to form a novel laminated slab with the pretensioning process, an overall pouring process of layered formworks is adopted, the construction problem during prestress tensioning of the fiber grids of the component can be effectively solved, the crack resistance of the laminated slab can be improved by adopting the prestress grids, the rigidity is increased, and the crack width under normal use conditions is reduced.

Abstract: Disclosed in the embodiments of the present disclosure are a method for notifying a message of a smart home based on a smart screen, an apparatus, and a smart screen. The method includes: receiving a notification message sent by a smart home device waiting to be processed by a user; determining, by means of a communication component of a smart screen, a first smart home device closest to the smart screen, so as to determine a location of the smart screen by means of the first smart home device; and starting infrared detectors installed in respective rooms, determining, according to a location of the user acquired by an infrared detector, a second smart home device closest to the user, and then using the second smart home device to send the notification message and the location of the smart screen to the user.

Abstract: A positioning method and device, the method including: extracting multiple light spots from a current image frame, wherein the current image frame is an image currently collected by an extended reality device; determining an interference light spot in the multiple light spots according to information about a historical interference light spot, and removing the interference light spot in the multiple light spots, recognizing whether there is a light spot of a luminous light source in remaining light spots after removing the interference light spot, wherein the luminous light source is a light source set on a human-computer interaction apparatus, and the human-computer interaction apparatus is used for a user to interact with the extended reality device; determining a current pose of the human-computer interaction apparatus according to the light spot of the luminous light source recognized in the remaining light spots.

Abstract: Embodiments of the present disclosure provide an image display method and apparatus, and an electronic device. The method includes: obtaining target position information of a user in a real environment when the user is in a virtual environment; obtaining first image data corresponding to the real environment and second image data corresponding to the virtual environment when the target position information meets a predetermined condition, both the first image data and the second image data being based on a same coordinate space; performing superposition and merging processing on the first image data and the second image data to generate third image data; and displaying the third image data, to enable the user to view environment data in the real environment when the user is in the virtual environment.

Abstract: Provided are a gesture interaction method and a gesture interaction system based on artificial reality. The method includes: determining a ray formed from a predetermined position of a hand to a finger joint when four fingers form a fist as an operation indication line, an end point of the ray being on the hand; determining a point of intersection between the operation indication line and a display surface in the artificial reality as a position of an operation icon in the artificial reality; controlling the operation icon to move correspondingly in response to detecting that the four fingers form the fist and move, to move the operation icon in the display surface to a target key; and determining, in response to detecting an action of a thumb of the hand touching an index finger, that the operation icon clicks on the target key to complete an interaction.

Abstract: An optical module includes: a circuit board with a recess; a laser box disposed in the recess and electrically connected to the circuit board; a fiber ribbon, wherein one end of the fiber ribbon is connected to the laser box; and a silicon photonic chip electrically connected to the circuit board and to the other end of the fiber ribbon. The laser box includes: a flat base disposed in the recess, with one end of the flat base being coupled to the fiber ribbon; a conductive substrate disposed at the other end of the flat base and electrically connected to the circuit board; a laser chip attached on the conductive substrate; and an upper cover including a top plate and side plates, so that the upper cover caps/is covered on the flat base. A fitting between the flat base and the upper cover facilitates assembly of the conductive substrate and the laser chip in the laser box.

Abstract: The present disclosure discloses a multi-sensor handle controller hybrid tracking method and device, wherein the method includes: acquiring tracking data of a handle controller, the tracking data including optical tracking data, electromagnetic tracking data, and inertial navigation data; constructing a state transition model and an observation model of an extended Kalman filtering iteration strategy according to the tracking data, and performing an extended Kalman filtering fusion on the optical tracking data, the electromagnetic tracking data, and the inertial navigation data; and determining position and orientation information of the handle controller in a space according to the extended Kalman filtering iteration strategy.

Abstract: A device and a method for in situ penetration measurement of gas transport parameters in an unsaturated soil layer. The device mainly consists of a gas supply system, a gas concentration display recorder, a gas pressure display recorder, a sleeve, a gas concentration sensor, a gas pressure sensor, a porous gas-permeable tube and a conical penetration head. The gas diffusion coefficient and permeability coefficient of the unsaturated soil can be obtained by only measuring the gas pressure value, the gas concentration value and the corresponding gas flow value of an unsaturated soil layer at a depth required to be tested, and substituting same into calculation formulae of the gas diffusion coefficient and permeability coefficient. The testing process of the method is simple and fast, and is low in cost, simple in operation and convenient in calculation.

Abstract: A dongle coupled between a power supplying device for supplying power and a power receiving device for receiving power includes a downstream facing port (DFP), an upstream facing port (UFP) and a controller. The controller is arranged to control deliveries of the power and messages between the power supplying device and the power receiving device. In response to a first power request message received from the power receiving device, the controller is arranged to determine whether a power type request by the power receiving device is Programmable Power Supply (PPS) according to the first power request message. When determining that the power type request by the power receiving device is PPS, the controller is arranged to start first waiting timer, and when the first waiting timer expires, the controller is arranged to send a request accept message to the power receiving device through the UFP.

Abstract: Disclosed in the present disclosure are a data generation method and apparatus, and an electronic device. The method includes: obtaining first image data, the first image data representing a real environment in which a user is located; obtaining category information and plane information of a target object, the target object being an object in the first image data, and the plane information including information of an outer surface of the target object; obtaining second image data, the second image data containing a virtual object; and generating target image data by mixing the first image data with the second image data based on the category information and the plane information, the target image data containing the target object and the virtual object.

Abstract: Embodiments of this application disclose a full-duplex self-interference cancellation method and apparatus. The full-duplex self-interference cancellation method may be applied to the field of radio frequency self-interference cancellation in a full-duplex scenario. The full-duplex self-interference cancellation method is implemented by a full-duplex self-interference cancellation apparatus with self-interference reconstruction modules of two levels, and the full-duplex self-interference cancellation apparatus is implemented by a terminal. This greatly reduces hardware implementation complexity and costs of the second self-interference reconstruction module, and improves a full-duplex self-interference cancellation capability.

Abstract: A method and apparatus for determining an exposure parameter of a head-mounted device, and a device are provided. The method includes: acquiring an average real brightness value of a region of interest of the image of the current frame; determining an average predicted brightness value of a region of interest of an image of a next frame if the average predicted brightness value is smaller than a lower limit of a first preset threshold range, sequentially selecting exposure parameter values equal to or greater than a current exposure parameter value, in a target exposure list to form a target exposure sub-list; and if the average predicted brightness value is greater than or equal to an upper limit of the first preset threshold range, sequentially selecting exposure parameter values equal to or smaller than the current exposure parameter value in the target exposure list to form a target exposure sub-list.

Abstract: The present utility model discloses a foldable breathable mat, comprising an inner core sheathed with an outer cover outside. Several folding marks are arranged on the outer cover, and a zipper is provided on the outer cover. According to the present utility model, several breathable holes are formed on the surface of a mesh cloth cover, an inner mat is made of air fiber, and a visible whole body is highly breathable, thereby solving the safety risk of possible suffocation. The three-fold and two-fold design is conducive to storage and portability. The mesh cloth cover may achieve quick drying and faster drying speed, and the air fiber mat may also be washed all over the body to prolong the service lifetime and reduce the storage conditions.

Abstract: Embodiments of the present disclosure provide an image display method and apparatus, and an electronic device. The method includes: obtaining target position information of a user in a real environment when the user is in a virtual environment; obtaining first image data corresponding to the real environment and second image data corresponding to the virtual environment when the target position information meets a predetermined condition, both the first image data and the second image data being based on a same coordinate space; performing superposition and merging processing on the first image data and the second image data to generate third image data; and displaying the third image data, to enable the user to view environment data in the real environment when the user is in the virtual environment.