Abstract: An electrical connector includes an insulating housing, a power leg, a ground leg, a power contact and a ground contact. The insulating housing has a peripheral wall. At least two perforations are defined on the peripheral wall. At least two leg recesses are formed on the peripheral wall. The perforations and the leg recesses are staggered along the peripheral wall. The power leg and the ground leg are both received in the peripheral wall of the insulating housing and are both have leg portions being exposed from the leg recesses. The power contact and the ground contact are both located in the perforations. As described above, manufacture material of the electrical connector is saved.

Abstract: Embodiments relate to polyolefin compositions containing one or more high-density polyethylenes (HDPEs) and linear low-density polyethylenes (LLDPEs) and methods for forming the same. The polyolefin composition contains about 40 wt % to about 60 wt % of HDPE and about 40 wt % to about 60 wt % of LLDPE, by weight of the polyolefin composition. The HDPE has a density of greater than 0.93 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The LLDPE has a density of less than 0.915 g/cm3 and a melt index of about 0.2 dg/min to about 10 dg/min. The polyolefin composition has a density of about 0.91 g/cm3 or greater, a melt index of about 0.5 dg/min to about 6 dg/min, and a Tw1?Tw2 value of about ?25° C. or less.

Abstract: Arginine deiminase (ADI)-containing genetically engineered Corynebacterium glutamicum (C. glutamicum), a fusion protein cipA-arc, use thereof, and a method for preparing [14/15N]-L-citrulline through enzymatic catalysis are provided. The ADI-containing genetically engineered Corynebacterium glutamicum (C. glutamicum) has a deposit number of CGMCC No. 19404, which expresses a fusion protein cipA-arc. Both the genetically engineered strain and the fusion protein cipA-arc can be used to convert [14/15N]-L-arginine into [14/15N]-L-citrulline.

Abstract: An elevator guide rail installation bracket and installation method thereof, a positioning tooling, a bracket adjustment tooling, and an elevator system. The elevator guide rail installation bracket includes a guide rail bracket having a guide rail installation surface and a first adjustment surface that form a bend, a fixed guide rail installation position is provided on the guide rail installation surface; and a hoistway bracket having a hoistway installation surface and a second adjustment surface that form a bend; the first adjustment surface is adjustably connected to the second adjustment surface to adjust the relative position between the guide rail installation surface and the hoistway installation surface.

Abstract: A system and method for adjustably positioning elevator guide rail. The system includes: an adjustment device arranged on a moving platform and having a clamping portion and a powering portion, the clamping portion being arranged to be capable of clamping an elevator guide rail to be installed through a power output from the powering portion and moving in a first, a second and/or a third directions, and the moving platform being capable of moving up and down in the first direction; a detection device arranged to detect current movement characteristics of the clamping portion when the elevator guide rail is not clamped or has been clamped by the clamping portion; and a control device connected to the detection device and the adjustment device, and arranged to adjust the position of the clamping portion in place by controlling the powering portion according to the movement characteristics.

Abstract: A follow-up shooting method and device, a medium and an electronic device are provided. The follow-up shooting method includes: acquiring a video image in a live classroom, wherein the video image comprises at least one object; analyzing the video image to obtain a gesture image for controlling a camera; and determining whether to control the camera to track and shoot an execution object related to the gesture image based on the gesture image.

Abstract: Provided are a preparation method and system for a recombinant adeno-associated virus (rAAV) and a recombinant bacmid. The method comprises: first reconstructing a recombinant bacmid containing a recombinant baculovirus genome that produces essential functional elements for an rAAV, at least one of the essential functional elements being inserted into the N-terminal or C-terminal of a locus of an essential gene of the recombinant baculovirus genome; and then transfecting the obtained recombinant bacmid containing the recombinant baculovirus genome that produces the rAAV into a host cell line for culturing to prepare an rAAV. Compared with recombinant baculoviruses obtained by conventional Tn7 recombinant preparations of recombinant bacmid, the recombinant baculovirus obtained by inserting a core element containing Cap, Rep and ITR into two sides of a baculovirus essential gene has a more stable rAAV serial passage production level in a cell and has a higher rAAV yield.

Abstract: A robotic cleaner may include a body having a top surface, a navigation sensor extending from the top surface of the body, a protective cover defining a sensor cavity, the navigation sensor being at least partially received within the sensor cavity, and a cover liquid diverter extending from an upper portion of the protective cover, the cover liquid diverter being flared in a direction of the body.

Abstract: A follow-up shooting method and device, a medium and an electronic device are provided. The follow-up shooting method includes: acquiring a video image in a live classroom, wherein the video image comprises at least one object; analyzing the video image to obtain a gesture image for controlling a camera; and determining whether to control the camera to track and shoot an execution object related to the gesture image based on the gesture image.

Abstract: The present disclosure provides a method, an apparatus, a medium and an electronic device for generating a round-table video conference. In the present disclosure, in response to the head instruction information of the participant, the scrolling starting number is determined from the round-table seat number sequence through the video of the current presenter, and the scrolling ending number is determined from the round-table seat number sequence through the video of the current speaker, thereby the scrolling sequence of the target seat numbers is obtained. According to the scrolling sequence, a manner of the virtual camera in the center of the round table being rotated and shooting is simulated, and the images of the participants queued between two points are scrolled and displayed, so that a virtual round-table conference scene is created in the video conference.

Abstract: A method and an apparatus of constructing a chess playing model are disclosed, method includes: acquiring a video image of each chess player; determining a two-dimensional position information for a first expression characterization point in the video image and a marking information for a facial structure characterization point in the first expression characterization point; determining a rotation information for each chess player in a specified direction; reconstructing a three-dimensional reference face model of each chess player so as to generate a three-dimensional target face model of the chess player; reconstructing a three-dimensional target chess player model of the chess player; reconstructing a three-dimensional target chess game model; and reconstructing a three-dimensional target chess playing model.

Abstract: A composition, including: a copolymer including units derived from ethylene, one or more ?-olefins, one or more substituted styrene compounds, and a pendant alkoxy silane group. A method was disclosed to incorporate pendant alkoxy silyl groups onto the benzylic positions. The silane-functionalized polymers show ability to cure with water. Additionally, blends of silane-functionalized polymers exhibit improved filler acceptance.

Abstract: A device for separating light flaky cut rolled stems (CRSs) by a throwing roller is provided. The device includes a vertically provided separation bin, and a CRS guide device and a CRS distribution plate which are arranged in the separation bin. The present disclosure further provides a method for separating light flaky CRSs by using the device. The present disclosure achieves full separation of finished CRSs from light flaky CRSs. The device of the present disclosure is designed for the first time, and can be directly connected to a pneumatic CRS feeding and discharging section of a production line. The device of the present disclosure is compact and suitable for industrial production.

Abstract: A human-cyber-physical resource-oriented adaptive construction method and apparatus for a structured peer-to-peer (P2P) network are provided. The structured P2P network is a point-to-point network with physical perception information and can be effectively used in a human-cyber-physical fusion scenario. The method includes: using a grid aggregation algorithm to calculate the latitude and longitude coordinates of a new node to acquire a position hash value of the new node; determining, according to the position hash value, a registration node of the new node from the existing nodes of the structured P2P network; and completing, according to the information returned by the registration node to the new node, registration of the new node, thereby resulting adding of the registered new node into the structured P2P network.

Abstract: A method and system for accessing a digital object in a Human-Cyber-Physical environment are provided. A P2P network is established based on a distributed hash table (DHT); a Kademlia algorithm is used to establish a forward routing table corresponding to each node; and an index binary tree is established according to a logical distance between each node in the forward routing table and a target node. In a process of transmitting a message from a node of a storage digital object to a root node, all nodes that the message passes establish backward routing tables for the digital object, so that in a data query stage, target data may be found from any node through the forward routing table and the backward routing table, and a data identifier of a data entity in the DHT-based P2P network from a storage location of the data identifier may be decoupled.

Abstract: A crankshaft assembly, a compressor and a refrigeration device are provided. The crankshaft assembly has an eccentric shaft component, a spindle component and a main screw oil pump. The eccentric shaft component has an eccentric cavity, and the spindle component has a first cavity communicated with the eccentric cavity. A first through-hole and a second through-hole in a first spindle are each communicated with the first cavity. An outer surface of the first spindle is provided with a first spiral oil groove connecting the first through-hole and the second through-hole. An outer surface of the main screw oil pump is provided with a second spiral oil groove along its length direction, and a spiral direction of the second spiral oil groove is opposite that of the first spiral oil groove.

Abstract: A method and an apparatus for controlling a camera, and a medium and an electronic device are disclosed. The method includes: acquiring head portrait information of a teacher in a video frame image of a live classroom in real time; analyzing the head portrait information to acquire organ identification information of each organ, wherein the organ identification information is used to indicate whether the organ exists; determining an orientation type of a face in the head portrait information based on the organ identification information, wherein the orientation type comprises a forward type, a lateral type, and a backward type; controlling the camera to focus on the teacher in response to the orientation type being the forward type; and controlling the camera to focus on a blackboard in response to the orientation type being the backward type or the lateral type.

Abstract: A method and an apparatus for controlling a video frame image in a live classroom, and a computer readable storage medium and an electronic device are provided. The method includes: acquiring image information of a target person in the video frame image; determining a plurality of detection points according to the image information; determining distribution information of the plurality of detection points based on relationship between the plurality of detection points and a preset first area; determining adjustment information of a camera based on the distribution information and camera parameters; and adjusting the camera according to the adjustment information, so that at least a part of the image information of the target person in the video frame image is located in a preset second area, wherein the second area is located in the first area.