Abstract: Embodiments of this application provide a keyboard and an electronic device. The keyboard is applied to the electronic device. The keyboard includes at least the following: a keyboard assembly, including a key; and a keyboard frame assembly, including an outer metal frame, an inner metal frame, and a key avoidance hole. The inner metal frame is connected to the outer metal frame, the key avoidance hole penetrates through the outer metal frame and the inner metal frame, the keyboard assembly is connected to the inner metal frame, the inner metal frame is located between the outer metal frame and the keyboard assembly, the inner metal frame is configured to carry the keyboard assembly, and the key is disposed in correspondence with the key avoidance hole. The keyboard of this application can reduce its thickness while ensuring rigidity as required, to improve portability of the keyboard.

Abstract: A PTFE composite powder, a preparation method thereof, and a composite material containing the same are provided. The PTFE composite powder includes the following components: a PTFE powder, an inorganic powder, and a surface treatment agent. The inorganic powder is coated on a surface of the PTFE powder to form an inorganic powder layer, and the surface treatment agent is coated on the inorganic powder layer. For the composite material obtained by the present invention, the compatibility between the PTFE composite powder and matrix polymer is better than that of the prior art, leading to larger addition amount, and smaller dielectric constant and dielectric loss of the composite material, thus suitable for being used as 5G materials.

Abstract: Provided are an image processing method and apparatus, a storage medium, and a device. The method includes acquiring edge image information in an expansion direction of an original image, selecting a target expansion mode from at least two candidate expansion modes according to the edge image information, and processing the original image by using the target expansion mode to obtain a target image.

Abstract: Disclosed in embodiments of the present application are a resource allocation method, a device, and a medium. The method comprises: a terminal device determines N NPRACH transmission resources corresponding to a sending period of an ephemeris-bearing SIB bearing according to said sending period as well as configuration information for an NPRACH transmission resource indicated in an SIB2, where N is a natural number greater than zero; the terminal device randomly selects one NPRACH transmission resource from among the N NPRACH transmission resources; and the terminal device performs random access on a network device by means of the selected NPRACH transmission resource.

Abstract: In the fault diagnosis method, apparatus, and computer device, the method includes acquiring line voltage values in real time according to a voltage collector connected to phase lines (S100); according to the line voltage values and preset system parameters, obtaining a voltage peak balance degree and a phase angle offset of the three-phase power grid (S200); and obtaining a fault diagnosis result according to the voltage peak balance degree and the phase angle offset (S300). In such a way, a real-time diagnosis operation of whether a three-phase power grid is balanced can be implemented only by performing on-line calculation and analysis on line voltage values, which has simple analysis operation to reduce the system complexity; and only a voltage collector is added, and no other hardware costs are required, moreover high diagnosis reliability is obtained.

Abstract: The present application provides a flow test tool, a negative pressure formation apparatus, and a battery manufacturing device. The flow test tool includes a base and a flow test module mounted on the base, the flow test module is provided with a plurality of test interfaces, and the test interface is connected to a fluid channel of a mechanism to be tested one by one.

Abstract: Methods for selecting and configuring a random access channel, an access device and a network device are provided.

Abstract: The present invention relates to an ultra-high molecular weight polyethylene and a process for preparing the same, said ultra-high molecular weight polyethylene has a viscosity-average molecular weight of 150-1000×104 g/mol, a metal element content of 0-50 ppm, a bulk density of 0.30-0.55 g/cm3, a true density of 0.900-0.940 g/cm3, a melting point of 140-152° C., and a crystallinity of 40-75%, and said polyethylene satisfies at least one of condition (1) and condition (2): Condition (1): tensile elasticity modulus is greater than 250 MPa, preferably greater than 280 MPa, more preferably greater than 300 MPa, Condition (2): Young's modulus is greater than 300 MPa, preferably greater than 350 MPa. The ultra-high molecular weight polyethylene has high mechanical properties, high melting point, low metal element content and ash content, and the preparation process is simple, flexible and adjustable, and the ultra-high molecular weight ethylene copolymer has a high tensile elasticity module.

Abstract: A method and system for automatically generating a data determining result includes an acquisition end sending a data acquisition module to a plurality of user terminals, and sending the first data fed back by the user terminals on the data acquisition module to an analysis end. The analysis end generates a display manner of the data determination result on the basis of a configuration condition. The display manner includes analysis items, a first operation logic for determining analysis values of the analysis items and/or a second operation logic for determining cross analysis values of different analysis items. The analysis end determines the analysis value of the analysis items and/or the cross analysis value of the different analysis items in the display manner from the first data, and generates a data determination result.

Abstract: The present invention relates to an ethylene polymer and a process for preparing the same, wherein the ethylene polymer has an average particle size of 50-3000 ?m, a bulk density of 0.28-0.55 g/cm3, a true density of 0.930-0.980 g/cm3, a melt index at a load of 2.16 Kg at 190° C. of 0.01-2500 g/10 min, a crystallinity of 30-90%, a melting point of 105-147° C., a comonomer molar insertion rate of 0.01-5 mol %, a weight-average molecular weight of 2×104 g/mol-40×104 g/mol, and a molecular weight distribution of 1.8-10. In the preparation process, raw materials containing ethylene, hydrogen gas and a comonomer are subjected to a tank-type slurry polymerization with an alkane solvent having a boiling point of 5-55° C. or a mixed alkane solvent having a saturated vapor pressure of 20-150 KPa at 20° C. as the polymerization solvent in the presence of a polyethylene catalytic system, at the molar ratio of hydrogen gas to ethylene of 0.01-20:1, preferably 0.

Abstract: A dust removal system for a laser cleaning machine, including: a filter, a gas pump, a gas pipe and a dustproof nozzle. The dustproof nozzle is fixed on a laser cleaning head provided with a laser cleaning head gas inlet and a laser cleaning head gas outlet; one end of the gas pump is connected to the filter, and the other end thereof is connected to the laser cleaning head gas inlet through the gas pipe; a dustproof nozzle gas inlet is provided on both sides of the dustproof nozzle, a dustproof nozzle gas outlet is provided on the front end of the dustproof nozzle; and the laser cleaning head gas outlet is connected to the dustproof nozzle gas inlet through a pipeline assembly. The present disclosure has the advantages of keeping a lens clean, prolonging service life of the lens, reducing time for replacing the lens, and reducing costs.

Abstract: The purpose of the present invention is to provide processing technology that can improve the dispersion stability and/or solubility of a plant-based milk. In the present invention, walnut milk and/or peanut milk is treated with protein deamidase and lipase, whereby the dispersion stability of the processed walnut milk and/or processed peanut milk that is obtained can be improved. Furthermore, oat milk is treated with protein deamidase and cyclodextrin glucanotransferase, whereby the dispersion stability of the processed oat milk that is obtained can be improved. In addition, a plant-based milk selected from the group consisting of soy milk, peanut milk, and coconut milk is treated with protein deamidase and cyclodextrin glucanotransferase, whereby the solubility of the processed plant-based milk that is obtained can be improved.

Abstract: Disclosed in the embodiments of the present application are a network access method and apparatus for a terminal, an electronic device and a storage medium. Said method comprises: a terminal determining a beam sweeping interval and a sweeping frequency point, and receiving a base station signal sent or forwarded by a satellite; determining the downlink signal quality of the base station according to the base station signal; and if it is determined, according to the downlink signal quality, that the terminal can successfully find a satellite, executing a network access process of the terminal.

Abstract: Addition curing electrically conductive liquid silicone rubber (LSR) compositions, their methods of preparation, and cured elastomeric products made from the compositions are provided. The compositions are cured to form elastomeric products suitable for high voltage applications such as cable joints, cable terminal applications, cable accessories and connectors. In general, the composition comprises: (a) at least one polydiorganosiloxane having at least two alkenyl groups per molecule: (b) at least one organohydrogenpolysiloxane: (c) at least one reinforcing filler: (d) at least one hydrosilylation catalyst: and (e) an electrically conductive filler. Component (e) comprises: (i) extra conductive carbon black: and (ii) single walled carbon nanotubes.

Abstract: The present invention relates to a process for continuously producing an ultra-high molecular weight polyethylene by the ethylene slurry polymerization, wherein raw materials containing ethylene and optionally at least one comonomer are subjected to a continuous slurry polymerization in a hydrogen free atmosphere in the ethylene slurry polymerization condition by using 2-6 ethylene slurry polymerization reaction tanks connected in series, and the deviations of the polymerization temperatures, the polymerization pressures, and the gas phase compositions between the tanks each other are controlled to certain ranges. The ultra-high molecular weight polyethylene having the viscosity-average molecular weight of 150-800×104 g/mol can be continuously produced. This process has flexible polymerization manner, large room for adjusting and controlling, and stable polymer performance.

Abstract: Disclosed in the present disclosure is a double-deck multi-span bridge construction method. According to the double-deck bridge construction method of the present disclosure, construction is carried out by using a method of disassembling a support jig frame in a graded and span-separated mode, an upper chord jig frame and a lower chord jig frame can be used in a recycle manner, and construction costs are reduced. In addition, a construction period of building the support jig frame is shortened, and other construction operations can be synchronously carried out on a span in which the jig frame is disassembled, for example, fire retardant coating construction can be carried out on a mounted bridge deck after the jig frame is disassembled, and the construction period of a double-deck multi-span bridge is effectively shortened.

Abstract: Disclosed in the present disclosure are channel selection and configuration methods and apparatus, which are used to resist transmission delay offset of different users within a cell and improve the signal-to-noise ratio of a random access channel sending signals, thereby improving a random access channel selection scheme suitable for a satellite communication system. At a terminal side, the channel selection method provided in an embodiment of the present disclosure comprises: determining a current signal transmission condition; and according to the current signal transmission condition and the configuration of a network, selecting the resources and channel format of a random access channel, wherein the random access channel uses a structure in which signal transmission is performed by using a means of repeated transmission by multiple preamble symbols.

Abstract: Disclosed are a transmission delay indication method and device. In the embodiments of the present disclosure, a network device determines a common transmission delay of at least one cell, and sends the common transmission delay to a terminal in the at least one cell. The common transmission delay is used for the terminal in the at least one cell to determine a transmission timing sequence with a network side.

Abstract: This application describes examples of a photovoltaic energy storage system including an inverter and an energy storage device. In one example, an input end of the inverter is connected to a direct current bus. An output end of the inverter is connected to an alternating current power grid. The energy storage device is connected to the direct current bus. The inverter is configured to send high-voltage ride-through information to the energy storage device when a high-voltage ride-through occurs in the alternating current power grid. The energy storage device is configured to: when the high-voltage ride-through information is received, adjust an output voltage reference value to maintain a discharging working state if the energy storage device is in the discharging working state, or adjust a charging power reference value to maintain a charging working state if the energy storage device is in the charging working state.