Abstract: A process for preparing trioxane from methanol includes: step 1: subjecting a mixture of methanol and methylal to a reaction to obtain formaldehyde, and absorbing the formaldehyde with water to obtain a concentrated formaldehyde aqueous solution; step 2: subjecting the concentrated formaldehyde aqueous solution to cyclization to obtain a mixture containing trioxane, and passing the mixture through a trioxane concentration tower to obtain a crude trioxane product; step 3: converting a by-product and unreacted formaldehyde in the crude trioxane product into methanol, conducting dehydration through a membrane dehydration process, and subjecting a retentate to dealcoholization to obtain purified trioxane; and step 4: subjecting the remaining streams to reactive distillation to obtain a mixture of methanol and methylal at a top-and water at a bottom of the reactive distillation tower; returning the mixture of methanol and methylal to step 1; and returning or discharging the water.

Abstract: The present disclosure discloses a stabilizer configured to be rotatable about a pitch axis and a roll axis for stabilizing a photographing device. Said stabilizer includes: a handle with a pitch axis motor, on a side face of which is provided with a first coupling part; a connection arm, on the distal end portion of which is provided with a holder driven by the roll axis motor and on a side face of which is provided with a second coupling part coupled with said first coupling part, such that said connection arm can move towards the distal direction or the proximal direction relative to said handle, and can move into a storage configuration with reduced storage space.

Abstract: Disclosed are a battery binder, a lithium-ion battery negative electrode plate and a lithium-ion battery. The adhesive contains a polymer having both hydrophillic and hydrophobic units. In addition, in the polymer, a medium-to-low molecular weight polymer is less than 5 wt % or less based on total amount of the polymer, and the molecular weight of the medium-to-low molecular weight polymer is less than 10000. The adhesive has a strong adhesive force, and the preparation method therefor is simple and low cost. Compared with an exiting negative electrode plate adhesive amount of 2.5%-5%, an adhesive amount of 1.5-2% can not only show a higher bonding force, but also the proportion of active material can be increased, thereby increasing the energy density of a battery.

Abstract: A method for speech-based instruction scheduling includes: a microphone included in an electronic device receiving a first input speech from a user; the electronic device converting the first input speech into a first text message; the electronic device obtaining first instruction contents of the first text message by parsing the first text message based on preset configuration instructions, in which the first instruction contents are configured to represent a target instruction object and a target instruction action; and the electronic device sending the first instruction contents to a scheduling object, so that the scheduling object controls the target instruction object to execute the target instruction action based on the first instruction contents.

Abstract: Provided is a display device including: a display panel including data lines extending in a vertical direction of a two-dimensional screen and each connected to a pixel for displaying one of multiple primary colors; and a data driver that supplies gradation data signals having voltage values corresponding to a brightness level of each pixel based on an image signal to the display panel via output terminals, and performs a time division drive on the data lines in a first to M-th division periods of each horizontal scanning period in the image signal. The display panel includes a time division switch for every M data lines to which the pixels for displaying a same primary color are connected, and the time division switch sequentially selects the M data lines one by one in each of the first to M-th division periods and connects the selected data line to one output terminal.

Abstract: The present disclosure provides an embedded mounting bracket and camera assembly comprising same. The embedded mounting bracket is used for mounting a camera, and the embedded mounting bracket includes a bracket body and a mounting member. The bracket body includes a bracket side wall, the bracket side wall includes a lower end surface and an upper end surface opposite to the lower end surface, and the upper end surface includes multiple step surfaces with different heights from the lower end surface. The mounting member is detachably assembled to the bracket body for bearing the camera. The mounting member is selectively assembled on the step surfaces with different heights, so as to replaceably assemble at least two cameras with different body heights to the bracket body.

Abstract: An automotive propulsion system. Both a compressor and a first retarder in a first propulsion system are connected to a first motor, so that the compressor and the first retarder can share a same power source. This can reduce a weight and costs of the automobile and improve use efficiency of the motor to save energy. In the first propulsion system, a first disconnector is disposed to implement a connection or disconnection between the first motor and the first retarder, and a second disconnector is disposed to implement a connection or disconnection between the first motor and the compressor. This can implement independent operation of the first retarder and the compressor. In addition, when a first propulsion system does not provide power, the first disconnector is opened, to prevent the first motor in the first propulsion system from being reversely dragged. This reduces an energy loss.

Abstract: The invention relates to the technical field of a processor, in particular to a method for parallel extracting instructions and a readable storage medium. The method generates a valid vector of fetched instructions according to the end position vector s_mark_end of the instruction, and performs parallel decoding of instructions at each position, calculation of instruction address and branch instruction target address operation through logical “AND” and logical “OR” operations. Ultimately, multiple instructions are fetched in parallel. The present invention is a method for generating a valid vector of fetching instructions according to the end position vector s_mark_end of the instruction, and extracting multiple instructions in parallel through logical “AND” and logical “OR” operations. The invention can extract a plurality of instructions in parallel, there is no serial dependence relationship between each instruction, and the time sequence is easy to converge, so a higher main frequency can be obtained.

Abstract: An electrical connector includes an insulating body, a number of first conductive terminals, a number of second conductive terminals, and a number of cables. The first conductive terminals include a number of first signal terminals and a number of first ground terminals. The second conductive terminals include a number of second signal terminals and a number of second ground terminals. The cables include a number of first cables electrically connected with the first signal terminals and a number of second cables electrically connected with the second signal terminals. The first ground terminals and the second ground terminals are connected to each other and are adapted to be electrically connected to a circuit board. With this arrangement, the present disclosure avoids ground return through cables, thereby simplifying the grounding method and improving the stability of signal transmission. The present disclosure also discloses an electrical connector assembly having the electrical connector.

Abstract: A display adjustment method and apparatus, a system, and a storage medium. The method includes: obtaining a reference position from an image displayed by a head-up display HUD system, where the reference position is related to a focal position, on the image displayed by the HUD system, of an eye of a user; obtaining a brightness weakening coefficient of each pixel based on a distance between each pixel in the image and the reference position; adjusting display brightness of each pixel in the image based on the brightness weakening coefficient of each pixel; and displaying an adjusted image based on the display brightness of each pixel in the adjusted image.

Abstract: The embodiments of the present disclosure provide a method and a system for controlling intelligent street lamps in a smart city based on an Internet of Things, the method is realized by a system for controlling intelligent street lamps in a smart city based on the Internet of Things, the system for controlling intelligent street lamps in a smart city includes a user platform, a service platform, a management platform, a sensor network platform and an object platform, the method is executed by the management platform, comprising: receiving road information acquired by the object platform through the sensor network platform, the road information including ambient light intensities and road images, and the object platform including a first sensor; determining road environment information based on the road images; and determining irradiation intensities of the street lamps on a road based on the ambient light intensities and the road environment information.

Abstract: Aspects of the disclosure provide a semiconductor device. In some examples, the semiconductor device includes a seal ring structure surrounding the region. The seal ring structure includes a first wall structure that extends through the silicon layer, and a first length of the first wall structure along a side periphery of the first die is longer than a pitch of contact structures.

Abstract: The present application discloses a LiDAR occlusion detection method and apparatus, a storage medium, and a LiDAR. The method includes: obtaining detected echo data, obtaining distance information of each point in the echo data, comparing the distance information with a preset distance range, and in response to the distance information being within the preset distance range, determining that the LiDAR is occluded. In the present application, it can be detected in real time whether the LiDAR is occluded, without affecting transmittance of the LiDAR or increasing manufacturing costs of the LiDAR.

Abstract: The disclosure provides a method and a system for muck truck management in a smart city based on Internet of Things. The method is performed by a management platform, including: obtaining construction site information, determining a target monitoring device of a target site based on the construction site information, obtaining muck truck monitoring data of the target site through the target monitoring device, and performing muck processing information analysis based on the muck truck monitoring data to generate muck truck management information.

Abstract: A display screen controlling method and apparatus. The method includes: obtaining a first gamma value according to a turn-on instruction for an under-display device sent by an application processor; switching a gamma value of a first display region corresponding to the under-display device to the first gamma value, so as to turn off a plurality of light-emitting pixels of the first display region; obtaining a second gamma value according to a turn-off instruction for the under-display device sent by the application processor; and switching the first gamma value of the first display region to the second gamma value, so as to turn on the plurality of light-emitting pixels of the first display region.

Abstract: Embodiments of this application disclose a widget processing method and a related apparatus, to switch a target icon to a widget set including a plurality of widgets, so that a widget is quickly added on an electronic device. The method in embodiments of this application includes: An electronic device displays a target icon. The electronic device receives a first operation performed on the target icon. The electronic device switches the target icon to a widget set in response to the first operation. The widget set includes a plurality of widgets of a plurality of applications. The electronic device displays the widget set.

Abstract: A polishing pad is provided. The polishing pad, suitable for polishing an object, includes a polishing layer and at least one groove. The polishing layer has a central region and a peripheral region surrounding the central region. The at least one groove is disposed in the polishing layer, wherein the at least one groove has two ends both located in the peripheral region, wherein the two ends include an open end and a closed end.

Abstract: A method for detecting a guard-rail on a road, which is performed by a guard-rail detection device, is provided. The method includes acquiring points around a lidar sensor from the lidar sensor, detecting ground points based on the acquired points, arranging, among the acquired points, first points that are different from the detected ground points in voxels forming a sphere, and detecting the guard-rail based on the voxels and the first points.

Abstract: A method is provided that includes: segmenting an image to be detected into a plurality of image blocks; generating a feature representation of the image to be detected based on the plurality of image blocks; mapping the feature representation by using a preset parameter set to obtain a plurality of feature maps of the image to be detected; and determining a position and a class of a target object in the image to be detected based on the plurality of feature maps.

Abstract: Methods and devices are provided for reducing the decoding latency introduced by luma mapping with chroma scaling (LMCS). In one method, during decoding of a coding unit (CU) that is coded by an inter mode or Combined Inter and Intra Prediction (CIIP) mode under LMCS framework, a plurality of reconstructed samples of luma component is obtained in a mapped domain, a plurality of converted samples of luma component is obtained in an original domain by converting the plurality of reconstructed samples of luma component from the mapped domain into the original domain, and the plurality of converted samples of luma component is used in the original domain, without clipping, in deriving chroma scaling factors for decoding the chroma samples of the CU.