Abstract: The present disclosure provides a method for preparing a metal mesh and a method for preparing an antenna, and belongs to the technical field of electronic devices. The method for preparing a metal mesh of the present disclosure includes: providing a base substrate; and forming a dielectric layer on the base substrate, and performing dry etching on the dielectric layer by an inductively coupled plasma device to form a meshed groove.

Abstract: Disclosed are a transparent antenna and a method for fabricating the same, an electronic device and a method for driving the same. The method for fabricating the transparent antenna includes: providing a first substrate; forming a defining layer on the first substrate; processing the defining layer to have a first groove, where an opening width in a first direction of the first groove at a first distance between the first groove and the first substrate in a direction perpendicular to the first substrate is less than an opening width in the first direction of the first groove at a second distance between the first groove and the first substrate, the first distance is greater than the second distance, and the first direction is parallel to the first substrate; and forming an electrode layer in the first groove of the defining layer.

Abstract: An electrochemical apparatus includes a positive electrode sheet including a positive electrode active material layer; a negative electrode sheet including a negative electrode active material layer; and a separator disposed between the positive electrode sheet and the negative electrode sheet. A mass ratio of fluorine to nitrogen on a surface layer of the positive electrode active material layer is A, a mass ratio of fluorine to nitrogen on a surface layer of the negative electrode active material layer is B, 3?A?50, and 30?B?300.

Abstract: A display apparatus is provided. The display apparatus includes a display area and a peripheral area. The display area includes a first display sub-area and a second display sub-area. The second display sub-area has a subpixel distribution density lower than a subpixel distribution density of the first display sub-area. The display apparatus further includes an antenna, a touch structure, and a display module. The antenna includes a radiating plate, a feed line, a ground plate, and a slot extending through at least the ground plate. The radiating plate, the feed line, the ground plate, and the slot are at least partially in the second display sub-area and outside the first display sub-area.

Abstract: An antenna includes at least one feed line including a first feed line, and a plurality of first patch units serially connected to the first feed line in an extending direction of the first feed line. The first feed line and/or the plurality of first patch units each have a mesh structure, and the mesh structure is composed of a plurality of conductive lines. Of the plurality of conductive lines, a distance between two conductive lines that are adjacent and do not intersect is greater than or equal to a maximum width of any conductive line, and is less than or equal to a minimum width of any feed line.

Abstract: A negative active material, including a silicon-based material and a sheet-shaped carbon-based material, where the sheet-shaped carbon-based material has a porous structure, a length-to-diameter ratio of the sheet-shaped carbon-based material is greater than or equal to 1.5, Dv50 of the sheet-shaped carbon-based material is 0.5 ?m to 25 ?m, and a mass percentage of the sheet-shaped carbon-based material is greater than or equal to 10% based on a total mass of the negative active material.

Abstract: A metal mesh includes: first metal lines (11) and second metal lines (12) extending in crossed directions. The first metal lines (11) are arranged side by side in a first direction and extend in a second direction; the second metal lines (12) are arranged side by side in the first direction and extend in a third direction. Each first metal line (11) includes first sub-line segments sequentially connected together in the second direction, and each second metal line (12) includes second sub-line segments sequentially connected together in the third direction. Each first sub-line segment has a midpoint superposing with a midpoint of one of the second sub-line segments, the first and second sub-line segments having superposed midpoints form a crossed structure (10), and define two opposite first angles (?1) and two opposite second angles (?2). Each first angle (?1) is not greater than each second angle (?1).

Abstract: A low-alkali accelerator and a preparation method therefor are provided. The preparation method comprises: S1, preparing a sodium metaaluminate solution; S2, adding water to the sodium metaaluminate solution, stirring same until uniform, then adding aluminum sulfate thereto, and reacting same at 50-80° C. for 0.5-1 h under stirring conditions; S3, within 10-30 min after complete reaction of the aluminum sulfate, adding, in a dropwise manner, a regulator to regulate the pH value to a neutral state; S4, mixing a strong-alkali weak-acid salt and a silicon dioxide gel until uniform, then adding same to a fluoride salt, and mixing same until uniform, to obtain a modified fluoride salt; and adding the modified fluoride salt to a neutral solution obtained in S3, and reacting same for 1-1.5 h, with the temperature maintained at 50-80° C.; and S5, adding an organic alcohol amine thereto, and stirring same for 0.5-1 h, to obtain the low-alkali accelerator.

Abstract: An active material layer is provided with at least one first pore structure, and the active material layer satisfies the following conditions: (a) 0?M/d?0.5, where M is a mass percentage of the first active material in the active material layer, and d is a ratio of a depth of the first pore structure to a thickness of the active material layer; and (b) ?1%?0.2M?S?3%, where S is a porosity of the active material layer. Adding the first active material with a larger gram capacity can increase the capacity of the electrochemical apparatus.

Abstract: A millimeter-wave antenna, an electronic device and a driving method thereof. The millimeter-wave antenna includes: a first base board; and an electrode layer provided on the first base board, including at least one electrode unit, wherein the electrode unit includes at least a first electrode component, the first electrode component includes a first main feeder line and a first radiation pattern, and both of the first main feeder line and the first radiation pattern are of a grid-line-like structure; and the first main feeder line extends in a first direction, the first radiation pattern includes one or more first sub-patterns, and the first sub-patterns are electrically connected to the first main feeder line, and are located on at least one side of the first main feeder line.

Abstract: An electrochromic dimming structure and a transportation apparatus are provided. The electrochromic dimming structure includes a substrate, an electrochromic device and a first protective layer. The electrochromic device includes a first electrode layer, an electrochromic layer and a second electrode layer, the first electrode layer is located between the electrochromic layer and the substrate, the first electrode layer and the second electrode layer are full-layer transparent electrode layers, and at least one of the first electrode layer or the second electrode layer includes an oxide material. The electrochromic device further includes a metal electrode located at at least one of a side of the first electrode layer away from the second electrode layer or a side of the second electrode layer away from the first electrode layer, and the metal electrode is electrically connected with at least one of the first electrode layer or the second electrode layer.

Abstract: Provided is a construction method for a fully prefabricated multi-story concrete plant, the construction method may achieve full coverage of a hoisting operation of the large beam and column prefabricated components of a floor by employing a single intelligent hoisting robot, an angle change of the track devices, an angle change of a moving device, and a self-lifting device. It is not necessary to arrange a transition track at the turn of the installation route, which saves space and installation cost, and overcomes the disadvantage of high cost caused by the traditional prefabricated construction mode of multi-story concrete plant, which needs to arrange a plurality of large hoisting equipment. It may achieve the mechanization and intelligence of the whole construction process of the fully prefabricated multi-story concrete plant.

Abstract: An antenna is provided. The antenna includes a microstrip feed line, a ground plate, a slot extending through the ground plate, and a radiating plate. The radiating plate is on a side of the ground plate and the slot away from the microstrip feed line. The radiating plate is configured to receive a signal from the microstrip feed line by aperture coupling through the slot. The radiating plate includes a plurality of radiating blocks spaced apart from each other.

Abstract: A phase shifter includes first and second dielectric substrates opposite to each other, first and second conductive patterns on a side of the first dielectric substrate close to the second dielectric substrate, a third conductive pattern on a side of the second dielectric substrate close to the first dielectric substrate, and an adjustable dielectric layer between a layer where the first and second conductive patterns are located and a layer where the third conductive pattern is located; the third conductive pattern includes a main structure, and first and second branches connected to the main structure on two sides of an extending direction thereof respectively; the phase shifter further includes a split ring resonator on a side of the second dielectric substrate away from the third conductive pattern, and orthographic projections of the split ring resonator and the third conductive pattern on the first dielectric substrate partially overlap each other.

Abstract: The present disclosure provides a display panel, and belongs to the field of display technology. The display panel includes a display module and an antenna module located on a side of a display surface of the display module; the antenna module includes an antenna unit; the antenna unit includes a dielectric substrate, a radiation structure arranged on the dielectric substrate, a first feed line and a second feed line, the first feed line and the second feed line feed the radiation structure and are electrically connected with the radiation structure, and feeding directions of the first feed line and the second feed line are different; the radiation structure includes radiation patches for at least two radiation frequency bands, and the radiation patches are electrically connected.

Abstract: Provided are a millimeter wave antenna and a preparation method thereof, an electronic device and a driving method thereof, relating to the field of display technology. The preparation method of the millimeter wave antenna includes: providing a first baseboard; forming a definition layer on the first baseboard; treating the definition layer to enable the definition layer to have a plurality of through holes; forming an electrode layer in each of the through holes of the definition layer; the electrode layer includes a radiation pattern and a feeder, and both the radiation pattern and the feeder include a mesh structure.

Abstract: The present disclosure provides an antenna, a method for manufacturing an antenna and a communication system. The antenna includes: a dielectric layer; a first electrode having at least one first opening therein; at least one radiating structure on a side of the dielectric layer different from that with the first electrode thereon; an orthographic projection of the radiating structure on the dielectric layer is located in that of the first opening on the dielectric layer; each radiating structure includes a second electrode and a third electrode, orthographic projections of the second and third electrodes on the dielectric layer are located in that of the first opening on the dielectric layer, the orthographic projections of the second and third electrodes on the dielectric layer are not overlapped; at least one first feed line and at least one second feed line.

Abstract: This application provides a feature processing method and apparatus for an artificial intelligence (AI) recommendation model, an electronic device, and a storage medium. The method includes obtaining input data, and converting a data structure of the input data into a uniform sample structure; determining a feature group identifier and a feature extraction function that correspond to the AI recommendation model; extracting a feature group identifier, a feature identifier and a feature value of the input data from the converted input data according to the feature extraction function; and constructing a sample of the AI recommendation model according to the feature group identifier, the feature identifier and the feature value of the input data.

Abstract: An antenna includes: a dielectric layer; a first electrode on the dielectric layer and having at least one first opening; at least one radiation structure on a side of the dielectric layer away from the first electrode, wherein an orthographic projection of each radiation structure on the dielectric layer is within an orthographic projection of one first opening on the dielectric layer; at least one first feeding line and at least one second feeding line, which are on the side of the dielectric layer away from the first electrode, wherein each radiation structure is electrically connected to one first feeding line and one second feeding line, taking a straight line in a length direction of the antenna and passing through a center of the first opening as a symmetry axis, the first feeding line and the second feeding line, connected to a same radiation structure, are symmetrical to each other.

Abstract: An antenna includes: a dielectric layer; a reference electrode layer on a first surface of the dielectric layer and with a slot therein; radiation structure on a second surface of the dielectric layer. The radiation structure includes a plurality of radiation parts spaced apart from each other, each of which includes radiation elements spaced apart from each other. The plurality of radiation parts in each radiation structure include first radiation part and a second radiation part; and a first microstrip line and a second microstrip line are on the second surface. The first microstrip line is configured to feed power to the radiation elements in the first radiation part, and the second microstrip line is configured to feed power to the radiation elements in the second radiation part. The first microstrip line has a feed direction different from that of the second microstrip line.