Abstract: A unidirectional perspective film includes a first niobium oxide layer, a first silicon oxide layer, an absorption layer, a second niobium oxide layer, and a second silicon oxide layer that are sequentially disposed. The absorption layer has a thickness ranging from 8 nm to 20 nm.

Abstract: Discloses a coherent microwave photonics radar detection method and system based on injection locking frequency multiplication. The method uses a baseband signal to modulate an optical carrier to generate a modulated optical signal including a plurality of high-order sidebands; the modulated optical signal is divided into two paths which are respectively injected into two slave lasers for high-order sideband injection locking to obtain two locked sideband optical signals; Based on combining and splitting two locked sideband optical signals, the radar transmitting signal and receiving optical signal can be obtained through photo-detection and electro-optic modulation. After coherent detection of receiving optical signal, obtaining the intermediate frequency signal, and detection target information can be extracted from intermediate frequency signal by radar algorithm.

Abstract: This application provides a plate, a method for manufacturing same, and an electronic device. The method includes: forming a resin layer on a surface of a matrix, where the matrix is formed from organic matter, and a material forming the resin layer is different from a material forming the matrix; immersing the matrix in a first solution, the first solution containing a dye; and lifting the matrix formed with the resin layer out of the solution, where a height by which the matrix is lifted out of the solution per minute is not greater than 180 mm.

Abstract: The present disclosure provides a case, a preparation method thereof and an electronic product. The case includes a glass cover plate, a plastic frame body and a metal substrate frame, where the glass cover plate, the plastic frame body and the metal substrate frame are sequentially bonded without steps. The method includes: (1) coating an edge of a glass cover plate with a first activator, and then drying; and (2) bonding the glass cover plate obtained in step (1) with a metal substrate frame by injection molding.

Abstract: The present disclosure provides a metal article having decorative graph-text. The metal article comprises includes a metal substrate having micropores on the surface, thermal sublimation ink filled in a portion of the micropores, and a pore-sealing layer located on the surface of the metal substrate. The present disclosure also provides a preparation method for a metal article having decorative graph-text.