Abstract: The present invention relates to the field of LIDAR technology, and in particular to an optical package structure for a LIDAR. An optical package structure for a LIDAR includes a housing; a laser transceiver component arranged in the housing, and configured to emit a laser and to receive for detection; a temperature control component arranged in the housing and connected to the laser transceiver component; and a conduction circuit board arranged on the housing and electrically connected to an external circuit board. The conduction circuit board is arranged to be electrically connected to the laser transceiver component.

Abstract: The present invention relates to the field of LIDAR technology, and in particular to a miniaturized LIDAR module. A miniaturized LIDAR module comprises a mounting housing, a circuit board arranged on the mounting housing, and a laser transceiver assembly arranged on the mounting housing and electrically connected to the circuit board. The mounting housing comprises a circuit board mounting portion arranged to carry the circuit board. The circuit board comprises at least one rigid circuit board and at least one flexible electrical connector electrically connected to the rigid circuit board. The circuit board is a bent structure with an opening at one end and stuck on the circuit board mounting portion. The miniaturized LIDAR module according to the present invention is compact in structure, excellent in structural stability, simple in the assembling process and small in size, and exhibits an excellent compatibility when applied to the whole system.

Abstract: A placement mechanism and a flat panel box are provided. The placement mechanism includes a body with a mounting surface configured to place a flat panel and a limiting assembly on the mounting surface. The limiting assembly includes at least two first limiting blocks at a first end of the body, a second limiting block at a second end of the body, and a locking portion. The at least two first limiting blocks include a flange extending over the mounting surface along a height direction of the body. The at least two first limiting blocks and the second limiting block are configured to limit a length direction and a width direction of the flat panel. The locking portion is located at the second end and has a locking member with a locking position and an unlocking position configured to lock and unlock a height direction of the flat panel.

Abstract: Provided is a liquid crystal handwriting board. The liquid crystal handwriting board includes: a liquid crystal panel, a photosensitive assembly, and a control assembly; wherein the liquid crystal panel includes a first substrate and a second substrate that are opposite; the photosensitive assembly includes a plurality of photosensitive elements; and the control assembly is electrically connected to the liquid crystal panel and the photosensitive assembly, and is configured to determine position information of a pixel region for erasure by detecting position information of target light irradiated to the liquid crystal panel by the photosensitive assembly and supply a pixel voltage to the plurality of pixel electrodes in the pixel region for erasure, such that a voltage difference is present between the plurality of pixel electrodes in the pixel region for erasure and the common electrode.

Abstract: An indoor unit comprises a built-in heat exchanger and a radiant heat dissipation casing, the radiant heat dissipation casing serving both as a protective casing for the indoor unit and as a radiant heat sink. The radiation heat dissipation casing is arranged in parallel with the built-in heat exchanger. When users need to quickly adjust the indoor temperature, they can switch on the radiant heat dissipation casing and the built-in heat exchanger at the same time, and the radiant heat dissipation casing and the built-in heat exchanger will exchange heat together to quickly adjust the indoor temperature. Users can also choose to separately use the built-in heat exchanger to adjust the indoor temperature to meet the needs of different users and operation conditions. After the indoor temperature reaches the preset temperature, users can choose to switch off the built-in heat exchanger and keep the radiant heat dissipation casing on.

Abstract: A display panel and a display apparatus are provided; the display panel is divided into a display region and a non-display region at least partially surrounding the display region; a fan-out region is provided in the non-display region; the display panel includes a substrate and a first power trace provided on the substrate; a first portion of the first power trace is provided in the fan-out region and configured to transmit a first power signal; and the first portion includes: a sheet-shaped trace proximal to an edge of the display panel, and a plurality of stripe-shaped traces spaced apart from one another and extending from the sheet-shaped trace toward the display region. According to the present disclosure, the first power trace in the fan-out region is configured to include the plurality of strip-shaped traces.

Abstract: The present disclosure provides a heat-resistant resistant starch (RS) and a preparation method thereof, and belongs to the technical field of food processing. The preparation method includes: preparing a short chain glucan (SCG) into a SCG mixed dispersion with a mass volume concentration of 20% to 100%, and conducting gelatinization to obtain a transparent SCG molecule solution; naturally cooling the transparent SCG molecule solution to allow recrystallization until the transparent SCG molecule solution is cooled to room temperature to obtain a crystallized starch; and freeze-drying the crystallized starch to obtain the heat-resistant RS. The preparation method is green during an entire process and does not involve any organic solvent, thus achieving a breakthrough in the simple and efficient preparation of a heat-resistant high-crystallized starch with a high yield and small particles. In the present disclosure, the heat-resistant RS has higher thermal stability, relative crystallinity, and RS content.

Abstract: A video segmentation method and apparatus, an electronic device, and a computer-readable storage medium, related to the technical field of video processing. The method comprises: acquiring a video frame to be processed in a target-video, and information to be segmented in the video frame to be processed; determining a tilt angle corresponding to the video frame to be processed according to the information to be segmented; performing correction processing on the video frame to be processed according to the tilt angle, to obtain a corrected video frame; and performing image segmentation on the corrected video frame according to the information to be segmented, to determine an image to be played.

Abstract: The speaker module includes a housing and a speaker. The housing has mounting space, the speaker divides the mounting space into first space and second space, and when the speaker works, a first sound wave is formed in the first space, and a second sound wave is formed in the second space, where the second sound wave and the first sound wave have equal amplitudes and opposite phases. The housing further has a third sound emitting hole and an inverter cavity, one end of the inverter cavity communicates with the second space, the other end of the inverter cavity communicates with the third sound emitting hole, the inverter cavity is configured to form a third sound wave at the third sound emitting hole when the speaker works, a phase of the third sound wave is the same as a phase of the first sound wave.

Abstract: Embodiments of this application disclose a baseband unit (BBU) and an access network device. The BBU includes M lasers, M switches (SWs), M photodetectors (PDs), an arrayed waveguide grating (AWG), M transmit ports, and M receive ports, where M is an integer greater than or equal to 2. An ith laser is coupled to an input end of an ith SW, an upper output end of the ith SW is coupled to an ith transmit port, and the AWG is separately coupled to lower output ends of the M switches SWs, the M PDs, and the M receive ports, where i=1, 2, . . . , or M. When a networking mode used by the BBU needs to be changed, an optical module or a component in the BBU does not need to be replaced, so that applicability, universality, and flexibility of the BBU can be improved.

Abstract: A method for preparing a self-supporting composite nanofiltration membrane is provided. A porous graphene-based two-dimensional sheet material is prepared by taking amino graphene quantum dots as the main body and subjecting them to an interfacial polymerization reaction with polyacyl chloride, and then the porous graphene-based two-dimensional sheet material is encapsulated in-situ with polyamide by an in-situ encapsulating technology to prepare a self-supporting porous graphene/polyamide separation layer with excellent permeability and high selectivity.

Abstract: A lidar module includes a laser transceiver assembly configured to transmit and receive at least one laser beam and a lens scanning assembly integrated with the laser transceiver assembly. The lens scanning assembly has a movable lens arranged on an optical path of the laser beam transmitted by the laser transceiver assembly. The movable lens is configured with a way of movement in which the movable lens moves in a plane perpendicular to an optical axis of the movable lens to adjust a deflection direction of the laser beam. The present invention is intended to provide a lidar module, which can resolve a defect of a small detection field of view (FOV) of a lidar and realize modularization and miniaturization of a lens scanning assembly and a lidar.

Abstract: The present disclosure provides a laser radar module, including a housing body; a laser transceiver assembly and a thermoelectric cooler temperature control assembly accommodated in the housing body, the laser transceiver assembly and the thermoelectric cooler temperature control assembly being stacked and in contact with each other; an upper cover of a sealed chamber accommodated in the housing body and fixedly connected on an inner wall of the housing body, the upper cover of the sealed chamber and the housing body together enclosing and sealing the laser transceiver assembly; and a first circuit board and a second circuit board that are stacked and electrically connected to each other for electrically controlling the laser transceiver assembly and the thermoelectric cooler temperature control assembly respectively. An object of the present disclosure is to provide a laser radar module to at least reduce the size of the laser radar module.

Abstract: A video processing method applied to a splicing screen is provided, including: dividing each frame of an initial video into multiple sub-images; and forming sub-videos using all the sub-images, the initial video and each sub-video including M frames, M being an integer greater than 1, and durations of individual frames of the sub-videos being the same, wherein i-th frames of all sub-videos are spliced into an i-th frame of the initial video, and a relative position of the i-th frame of any sub-video in the i-th frame of the initial video is the same as a relative position of any other frame of the sub-video in a corresponding frame of the initial video, where i is a variable whose value is a natural number from 1 to M. A dividing task distribution method, a computer-readable storage medium, a scheduling server, an execution server and a video processing system are provided.

Abstract: An image rendering method includes acquiring a water wave map corresponding to a target water body region, and acquiring a normal map corresponding to the target water body region in a next image frame based on the water wave map corresponding to the target water body region in the current image frame. The method further includes rendering a water wave effect on the target water body region in the next image frame based on the normal map. The method further includes performing attenuation processing on the water wave map corresponding to the target water body region where the dynamic object is located in the current image frame based on a water wave diffusion attenuation matrix corresponding to the dynamic object to obtain an attenuated water wave map when the dynamic object moves in water.

Abstract: An in-situ square sample acquisition device and method for a bond contact test of a surrounding rock and a shotcrete layer are provided, the device includes a supporting shell, a fixing structure, hollow adjusting bolts and two borehole positioning frames, a guide hole is provided in a middle of the supporting shell, the frames are slidably fit in the guide hole, a plurality of positioning holes are provided in side walls of each of the frames, and the positioning holes in different frames are distributed in a staggered manner, four corners of the supporting shell are connected with four hollow adjusting bolts respectively, one end of each of the hollow adjusting bolts is fixedly provided with an adjusting nut, four fixing lugs are provided in four corners of each frame respectively, and the fixing structure includes four connecting bolts and four nuts.

Abstract: An image rendering method includes acquiring a water wave map corresponding to a target water body region, and acquiring a normal map corresponding to the target water body region in a next image frame based on the water wave map corresponding to the target water body region in the current image frame. The method further includes rendering a water wave effect on the target water body region in the next image frame based on the normal map. The method further includes performing attenuation processing on the water wave map corresponding to the target water body region where the dynamic object is located in the current image frame based on a water wave diffusion attenuation matrix corresponding to the dynamic object to obtain an attenuated water wave map when the dynamic object moves in water.

Abstract: Aspects of this disclosure provide a method where a normal map corresponding to a target water body region where a dynamic object is located in a next image frame can be acquired based on a water wave map corresponding to the target water body region where the dynamic object is located in a current image frame, and a water wave effect on the target water body region where the dynamic object is located in the next image frame is rendered according to the normal map. On the one hand, through iterative rendering frame by frame, a realistic water wave animation effect can be simulated to make the water surface interaction very natural, providing users with immersive experience. Further, because the water wave rendering is performed only on the target water body region, the complexity is lowered, and the calculation amount is reduced, to better adapt to a mobile terminal application.

Abstract: The present disclosure provides a display method, including: receiving a task list, the task list includes at least one display task, and the display task includes identification information of a video resource corresponding to the display task; displaying the video resource defined by a first target task according to the first target task, where the first target task is a display task, in which the identification information of the display terminal serving as a host is the same as that of a current display terminal; and sending a display trigger signal to a display terminal serving as a slave in the first target task, where the display trigger signal is for controlling the display terminal receiving the display trigger signal to display the video resource defined by the first target task. The present disclosure further provides a display control method, a display terminal, a server and a display system.