Abstract: A method of pushing a video, an electronic device and a storage medium are provided, which relate to a field of data processing technology, in particular to big data technology. The method includes: acquiring first high-quality videos; acquiring posterior data obtained when each first high-quality video is distributed for a first preset number of times as a label for the video; acquiring a first preset number of users earliest interacting with each first high-quality video; generating training samples using the videos as video-side features and the users as user-side features to train at least one ranking model; acquiring a first target user; acquiring one or more candidate videos corresponding to each opinion leader to form a first video set; and pushing, after ranking for the first video set using the at least one trained ranking model, a top second preset number of videos to the first target user.

Abstract: The present disclosure relates to the field of energy storage technologies, and provides a current sharing method for a battery (11), an electronic device, and a computer readable storage medium. The method includes: acquiring state parameters of battery packs (1) connected in parallel; comparing the state parameters of the battery packs (1) to obtain a comparison result; in a case where the state parameters of the battery packs (1) match, performing current sharing control on the battery packs based on a master-slave current sharing mode; and in a case where the state parameters of the battery packs (1) do not match, performing current sharing control on the battery packs based on a proportional current sharing mode.

Abstract: A camera optical lens is provided. The camera optical lens includes, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The camera optical lens satisfies the following conditions: 0.90?f1/f?2.00; and 2.50?d13/d14?12.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d13 denotes an on-axis thickness of the seventh lens, and d14 denotes an on-axis distance from an image side surface of the seventh lens to an object side surface of the eighth lens. The camera optical lens according to the present invention has better optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: Provided is a camera optical lens, including first to fifth lenses. The camera optical lens satisfies: ?3.50?f2/f??1.50; 10.00?d1/d2?35.00; 1.80?(R5+R6)/(R5?R6)?8.00; R9/d9??15.00; and ?30.00?R2/R1??10.00, where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; d1 denotes an on-axis thickness of the first lens; d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens; R5 and R6 denote curvature radiuses of an object side surface and an image side surface of the third lens, respectively; d9 denotes an on-axis thickness of the fifth lens; and R1 and R2 denote curvature radiuses of an object side surface and the image side surface of the first lens. The camera optical lens has good optical performance and satisfies the requirement for ultra-thin design.

Abstract: A camera optical lens is provided. The camera optical lens includes, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The camera optical lens satisfies following conditions: 0.90?f1/f?2.00; and 2.50?d13/d14?12.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d13 denotes an on-axis thickness of the seventh lens is defined as d13, and d14 denotes an on-axis distance from an image side surface of the seventh lens to an object side surface of the eighth lens. The camera optical lens according to the present invention has better optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Abstract: Provided is a camera optical lens, including first to fifth lenses. The camera optical lens satisfies: ?3.50?f2/f??1.50; 10.00?d1/d2?35.00; 1.80?(R5+R6)/(R5?R6)?8.00; R9/d9??15.00; and ?30.00?R2/R1??10.00, where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; d1 denotes an on-axis thickness of the first lens; d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens; R5 and R6 denote curvature radiuses of an object side surface and an image side surface of the third lens, respectively; d9 denotes an on-axis thickness of the fifth lens; and R1 and R2 denote curvature radiuses of an object side surface and the image side surface of the first lens. The camera optical lens has good optical performance and satisfies the requirement for ultra-thin design.