Abstract: Disclosed is an electronic device including a display module and a camera module. The display module includes a first substrate and a second substrate stacked with each other, and a routing structure arranged on a surface of one side of the second substrate facing towards the first substrate, and provided with a first light-passing hole. The camera module includes a camera body and a light-shielding layer arranged on a surface of one side of the first substrate away from the second substrate and provided with a light inlet hole and a second light-passing hole. The first light-passing hole, the second light-passing hole, and the light inlet hole are arranged in an optical axis direction of the camera module. An orthographic projection of the first light-passing hole and the second light-passing hole on a surface perpendicular to the optical axis direction fall within an orthographic projection of the light inlet hole.

Abstract: A modified cutinase is disclosed. The cutinase has the modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of asparagine at position 181 with alanine, or substitutions of asparagine at position 181 with alanine and phenylalanine at position 235 with leucine. The modified enzyme has improved PET-hydrolytic activity, and thus, the high-activity PET hydrolase is obtained, and the industrial application value of the PET hydrolase is enhanced.

Abstract: Embodiments of the present disclosure provide an active equalizer circuit, a battery management system, a power supply system and an electrical equipment. The active equalizer circuit comprises a plurality of switching transistors, a driving transformer, a multi-port converter, a buck converter, and a microcontroller. Each of the switching transistors is coupled to a battery cell in the series battery pack on a one-to-one basis. The multi-port converter comprises an equalizing transformer and a bridge converter, each secondary winding of the bridge converter is coupled to a corresponding plurality of battery cells. The buck converter has an input terminal coupled to an output terminal of the series battery pack and an output terminal coupled to an input terminal of the bridge converter.

Abstract: A method and apparatus for storing and reading files are provided. The method includes: dividing a file into a plurality of sections, generating a unique section key for each section, and storing a main key for the file and the plurality of sections keys as a main storage record; dividing a section into a plurality of blocks, generating a unique block value for each block within the section, generating a section value corresponding to the section key based on the plurality of block values, and storing the section key and the section value as a section storage record; and associating each block value with indexing information for the corresponding block. In accordance with the method and apparatus for storing and reading files, file indexes are stored in separate groups to increase the maximum file size and the speed for reading file indexes while reducing the cost for reading file indexes.

Abstract: A process for producing fiber of ultra high molecular weight polyethylene, with a flat cross-section and high cohesiveness, is disclosed. The process includes: distributing the powder of UHMWPE into a solvent evenly; preparing an uniform emulsion mixture by properly untangling with high shear; at the same time adding polar polymer comprising polar groups, for example a carboxyl group, a carbonyl group, an ether group, or an ester group and so on; evenly distributing the polar polymer together with the polyethylene powder in the solvent to form an uniform emulsion mixture; forming a gel filament from the emulsion mixture by gel spinning method, then extracting, drying, and stretching so as to obtain the UHMWPE fiber, with a flat cross section, high strength and cohesiveness. By properly untangling, the swelling and dissolving of the ultra high molecular weight polyethylene can be accelerated, while the polar polymer being evenly distributed therein can significantly improve the adhesive property of the fiber.