Abstract: The wearable electronic device includes a housing and a circuit board assembly. The circuit board assembly is located inside the housing, and is fastened relative to the housing. The housing includes a carbon fiber material, and the housing has an inner surface. The housing includes a conductive layer disposed on the inner surface. The conductive layer electrically connects the carbon fiber material scattered in the housing. The housing is electrically connected to the circuit board assembly by using the conductive layer. In the technical solution, the housing is integrally formed as a conductor by using the conductive layer disposed on the inner surface of the housing, and the housing is further electrically connected to the circuit board assembly by using the conductive layer.

Abstract: The present invention discloses a clustering routing optimization method based on adaptive evolutionary algorithm for a wireless sensor network, comprising following steps: performing population initialization by initial position and energy information of sensor nodes; calculating fitness values, and implementing iterative operation of elite preservation, adaptive crossover and mutation; after the iteration, selecting a cluster head; routing data packet of the cluster head to a base station. Convergence process of the evolutionary algorithm is improved by nonlinearly adjusting the probability of crossover and mutation; upper and lower bound of crossover and mutation operators are dynamically adjusted by fitness value; adding an incentive factor, adjusting the crossover and mutation probability when the fitness value tends to converge, and running the algorithm again to confirm that a new optimal value is generated.

Abstract: A method for preparing a supported noble metal catalyst, comprising: i) melting a noble metal sponge, a peroxide, and a support and/or a support precursor together; ii) dispersing the molten mixture in water; and iii) adjusting the pH to 4 to 10, thereby obtaining a supported noble metal catalyst. The method uses a noble metal sponge rather than an intermediate noble metal precursor, such as a noble metal nitrate salt, a noble metal halide salt, a halogenated noble metal acid, or a salt of the halogenated noble metal acid, for example, H3IrCl6, H2IrCl6, or IrCl3. The method does not produce any intermediate product, and does not use any chlorine-containing material, thereby avoiding contamination of the final catalyst by chlorine. The catalyst produced by the present invention has high activity, high surface area, and the RDE OER overpotential is less than 230 mV (at 10 mA cm2).

Abstract: This application provides a water conservancy project operation trend prediction method. The method includes: acquiring to-be-processed initial monitoring data, and determining a first type of monitoring data and a second type of monitoring data according to the initial monitoring data; determining a target nonlinear fitting model from a preset nonlinear fitting model set according to the second type of monitoring data; and predicting the state of a target water conservancy project by a new model constructed by combining the target nonlinear fitting model with the models in the preset prediction model set.

Abstract: A quote display method includes: the automobile repair terminal sending a parameter test value of the automobile accessory to the test server; the test server sending the parameter test value to the big data platform; the big data platform determining a target keyword corresponding to a faulty automobile accessory according to the parameter test value and a parameter standard value of the automobile accessory, and sending the target keyword corresponding to the faulty automobile accessory to the test server: the test server sending the target keyword to the automobile repair terminal; the automobile repair terminal sending the target keyword to the quote server: the quote server determining, according to the target keyword, accessory information and accessory quote of a target automobile accessory, sending the accessory information and the accessory quote to the automobile repair terminal; the automobile repair terminal displaying the accessory information and the accessory quote.

Abstract: Video decoding and encoding methods and apparatuses are provided. The decoding method includes: obtaining a first parameter set corresponding to a to-be-decoded video frame; determining an effective quantization matrix (QM) according to syntax elements included in the first parameter set, the effective QM being a QM actually used for inversely quantizing quantized transform coefficients during decoding of the to-be-decoded video frame; and decoding the effective QM.

Abstract: A printed circuit board and a fabricating method thereof, and a displaying device. The printed circuit board includes a hard-board region (30) and a soft-board region (31), the soft-board region (31) is located at the periphery of the first edge (30a) of the hard-board region (30), the printed circuit board within the hard-board region (30) includes a base plate (301), and an adhesive film (302), a covering film (303) and a first metal layer (304) that are arranged in layer configuration on one side of the base plate (301), the adhesive film (302) is closest to the base plate (301), a flow guiding groove (3030) is disposed on the surface of the side of the covering film (303) that is closer to the adhesive film (302), and the flow guiding groove (3030) extends to a second edge (30b) of the hard-board region (30).

Abstract: A wearable electronic apparatus includes a body and a band. The body includes a shaft hole, and the band includes a connection part, two spring bar pins, two first springs, a button, two second springs, and a cover. The connection part includes an accommodation cavity, and the accommodation cavity includes two first openings and one second opening. Each spring bar pin is slidably disposed in the accommodation cavity at the first opening. Each spring bar pin includes a matching end and a mounting end that are opposite to each other. The matching end is configured to cooperate with the button, and the mounting end is configured to be accommodated in the shaft hole.

Abstract: Embodiments of the present disclosure disclose a method and apparatus for controlling an aircraft for following and photographing, an electronic device, and a storage medium. The method includes: receiving a following instruction of a user, and controlling an aircraft to enter a following mode according to the following instruction; obtaining a currently captured picture of the aircraft, and displaying the currently captured picture to the user, so that the user selects a following target from the currently captured picture; controlling the aircraft to lock on the following target for following and photographing, and displaying a following orientation control to the user; and controlling, according to an operation of the user on the following orientation control, the aircraft to switch a following orientation.

Abstract: A wearable product includes a display system, a rear housing, a middle frame, a printed circuit board, and a conductive component. The rear housing is located on a non-light-emitting side of the display system. The middle frame is located between the display system and the rear housing, and is a hollow frame structure. The middle frame includes a metal frame and a plastic frame nested in the metal frame and connected to the metal frame. The plastic frame is connected to the display system and the rear housing in a sealing manner to form an accommodation cavity. The printed circuit board is located in the accommodation cavity. A part of the conductive component is located in the accommodation cavity and electrically connected to the printed circuit board, and the other part of the conductive component passes through the plastic frame to be electrically connected to the metal frame.

Abstract: A catalytic synthesis method, a device and a system for ammonia synthesis through orderly regulation of the electronic domain of nitrogen are provided. Nitrogen and hydrogen are used as raw materials, and a multi-composition material with magnetic material as active site is used as a catalyst, thermal field, magnetic field and electric field or thermal field and electromagnetic field are applied to nitrogen, hydrogen and catalyst at the same time. The invention adopts the catalytic synthesis method, device and system for the mild ammonia synthesis at low temperature and low pressure conditions through orderly regulation of the electronic domain of nitrogen.

Abstract: A method of training a target object detection model includes: extracting a plurality of feature maps of a sample image according to a training parameter, fusing the plurality of feature maps to obtain at least one fused feature map, and obtaining an information of a target object based on the at least one fused feature map, by using the target object detection model; determining a loss of the target object detection model based on the information of the target object and a tag information of the sample image, and adjusting the training parameter according to the loss of the target object detection model. A method of detecting a target object and an apparatus are also provided.

Abstract: In an example method embodiment, the SDN controller receives a first message from a first network device controlled by SDN, where the first message includes type information indicating that a type of the first message is a resource report type and resource information of a computing node associated with the first network device; and determines, based at least on the first message, resources of a SDN domain in which the SDN controller is located. As such, the SDN controller also can manage and control the resources of the SDN domain in addition to controlling the SDN network. Therefore, the SDN controller can perform a resource allocation according to the resources of the SDN domain, to optimize the computing power resources of the SDN domain, boost the resource utilization rate of the SDN domain, and further enhance the processing efficiency of the packets.

Abstract: Various embodiments of the teachings herein include a method for knowledge recommendation. The method may include: obtaining current searching information of a user for certain knowledge in factory production, job characteristic information of the user, and historical feedback information of the user for at least one knowledge item and/or knowledge resource in the past; using a first prediction algorithm model for learning based on historical searching information, job feature information, and historical feedback information of the user and other users to analyze obtained information, to obtain first prediction information including a first number of knowledge items; using a second prediction algorithm model to perform fusion sorting on the first prediction information and thereby obtain second prediction information including a second number of knowledge items; providing the second number of knowledge items to a knowledge recommendation model; and recommending a knowledge resource output from the model.

Abstract: Provided is a silicon-based anode material with high stability and conductivity for lithium-ion batteries, which is prepared by depositing a multilayer composite carbon coating on a surface of a silicon-based anode material for lithium-ion batteries by adjusting an alternate operation of a negative bias and a positive bias and utilizing unbalanced magnetron sputtering. Where a structure of the multilayer composite carbon coating, from a nano silicon power outward, comprises a diamond-like carbon transition layer and a high-conductivity graphite-like functional layer arranged alternately in sequence; an Sp3 structure of the diamond-like carbon transition layer has a carbon content of at least 65 at %; and an Sp2 structure of the graphite-like functional layer has a carbon content of at least 65 at %.

Abstract: A multi-nozzle concurrent printing system includes a plurality of extrusion type nozzle assemblies, a three-axial translation mechanism and an objective table. Each nozzle assembly is provided with a nozzle, a storage barrel and a temperature control module; the three-axial translation mechanism includes an X-axial translation unit, a Y-axial translation unit and a Z-axial translation unit, and the nozzle assemblies are mounted on the Z-axial translation unit; and there are a plurality of nozzle assemblies, the printing system is provided with a concurrent calibration sensor, and the concurrent calibration sensor is taken as an original point of a coordinate system of the printing system. The printing system is provided with the plurality of nozzle assemblies which can work cooperatively or sequentially, the printing mode is flexible and changeable, and non-uniform mixing system forming of materials can be realized; and stable output of the materials in a formal printing task is guaranteed.

Abstract: A method includes receiving, at a computing device, a transcription of an audio recording, where the transcription is divided into a plurality of text sections. The method additionally includes associating one or more tags with each text section of the plurality of text sections, where each associated tag is extracted from text of the transcription. The method also includes selecting a subset of the plurality of text sections based at least on the one or more tags associated with each text section of the plurality of text sections. The method further includes providing, for display on the computing device, a representation of the transcription and a scroller interface, where the scroller interface allows for navigation to each text section in the subset based on user navigation to a tag associated with the text section.

Abstract: A quote display method includes: the automobile repair terminal sending a parameter test value of the automobile accessory to the test server; the test server sending the parameter test value to the big data platform; the big data platform determining a target keyword corresponding to a faulty automobile accessory according to the parameter test value and a parameter standard value of the automobile accessory, and sending the target keyword corresponding to the faulty automobile accessory to the test server: the test server sending the target keyword to the automobile repair terminal; the automobile repair terminal sending the target keyword to the quote server: the quote server determining, according to the target keyword, accessory information and accessory quote of a target automobile accessory, sending the accessory information and the accessory quote to the automobile repair terminal; the automobile repair terminal displaying the accessory information and the accessory quote.

Abstract: A substrate structure includes an AlN template layer formed on a substrate. Depressions sealed by the AlN template layer are formed on a surface of the substrate at an interface between the substrate and the AlN template layer, the sealed depressions contain discrete depressions and depression networks and have a lateral size in the range of 20-100 nm, a vertical dimension in the range of 20-100 nm, and a density in the range of 1.0×109-2.0×1010 cm?2. The substrate structure is used for light-emitting diodes with improved optical output power efficiency.