Abstract: Provided are an interaction method and apparatus in a live streaming room, a device, and a storage medium. The method comprises: in response to a trigger operation for a preset drawing entry on a live streaming room page, jumping to a graphic drawing page from the live streaming room page, a drawing trajectory set for a preset object being displayed on the graphical drawing page; when a drawing stroke on the graphic drawing page is received, matching the drawing stroke with the drawing trajectory; and if it is determined that the drawing stroke is successfully matched with the drawing trajectory, displaying prompt information about successful participation in a preset activity, the preset activity and the preset drawing entry having a correspondence.

Abstract: An automated checkout system accesses an image of an item inside a shopping cart and a location of the shopping cart within a store. The automated checkout system identifies a set of candidate items located within a threshold distance of the location of the shopping cart based on an item map. The item map describes a location of each item within the store and the location of each candidate item corresponds to a location of the candidate item on the item map. The automated checkout system inputs visual features of the item extracted from the image to a machine-learning model to identify the item by determining a similarity score between the item and each candidate item of the set of candidate items. After identifying the item, the automated checkout system displays a list comprising the item and additional items within the shopping cart to a user.

Abstract: A new ring coupling structure for a linear accelerator includes an acceleration cavity, a coupling cavity, and a beam hole. The acceleration cavity and the coupling cavity are alternately assembled together. The beam hole penetrates through the acceleration cavity and the coupling cavity. The acceleration cavity adopts a bowl-shaped structure, a convex cone structure with a mesoporous is disposed on an inner wall of the acceleration cavity along the beam hole. Coupling holes between the acceleration cavity and the coupling cavity are designed as at least two waist-shaped holes uniformly distributed around the beam hole. The coupling cavity adopts a disc-shaped cavity structure with a thickened edge, and a nose cone is disposed in the coupling cavity and welded with cavity walls at both ends of a coupler. The left and right waveguide plates of the coupling cavity are welded together by using the nose cone.

Abstract: A novel spider electronic tag includes a take-up device; and a base connected to the take-up device through a retractable steel wire rope. The take-up device includes: a housing; a take-up assembly, mounted in the housing; and a locking fastener, mounted in the housing and configured to lock the take-up assembly; the locking fastener includes: a rotating ratchet member, fixedly arranged at the top of the take-up assembly; and a leaf spring, embedded in an inner circumferential wall of the housing and configured to cooperate with the rotating ratchet member to lock the take-up assembly. The steel wire rope is passed in a listed sequence through the rotating ratchet member, the take-up assembly and the base clockwise from top to bottom, and two ends of the steel wire rope are fixed inside the rotating ratchet member, to connect the take-up device with the base.

Abstract: A cable detection system for detecting an end of a cable having a plurality of exposed different sections includes an illumination device and a camera. The illumination device emits an illuminating light to the end of the cable. The illumination device simultaneously emits a parallel light and a diffuse light to the end of the cable. The camera captures an image of the end of the cable. The parallel light sharpens a boundary between the different sections of the cable in the image, and the diffuse light clarifies a surface of the different sections in the image.

Abstract: This application relates to the field of lighting, and discloses an LED filament. The LED filament includes an LED chip unit, a light conversion layer, and an electrode. The light conversion layer covers the LED chip unit and part of the electrode, and a color of a light emitted by the LED filament after lighting is different from a color of the light conversion layer. This application has the characteristics of uniform light emission and good heat dissipation effect.

Abstract: The present invention relates to the technical field of mine fire prevention and extinguishing, in particular to a liquid nitrogen direct injection and low-temperature foaming intelligent filling system based on mine fire area characteristics and an application method, comprising a liquid nitrogen storage tank, a liquid nitrogen direct injection system and a low-temperature foaming system, wherein the liquid nitrogen storage tank communicates with a liquid nitrogen pressurizing device through a main pipeline; a temperature control unit is arranged on the main pipeline; and the liquid nitrogen pressurizing device is connected with the liquid nitrogen direct injection system and the low-temperature foaming system, respectively, liquid nitrogen is directly injected into a foam liquid, to prepare a low-temperature foam type fire preventing and extinguishing material by means of forced convection, membrane boiling, explosion boiling and nucleate boiling between the liquid nitrogen and water.

Abstract: A rocker polishing apparatus for full-aperture deterministic polishing of a planar part includes a control system, a substrate, a lifting plate, a polishing module and a measuring module. The polishing module and the measuring module are arranged on the substrate. The lifting plate is arranged between the polishing module and the measuring module. The polishing module includes a rocker mechanism, a polishing pad surface dressing mechanism, a polishing pad surface profile measuring apparatus and a continuous polishing pad mechanism. The apparatus allows the material removal rate distribution of the planar part and the surface profile of the planar part be in the normalized mirror symmetry relationship by controlling the material removal rate distribution on the surface of the planar part, thereby implementing the deterministic polishing of the planar part and ensuring the efficient convergence of the surface profile of the planar part in the polishing process.

Abstract: A misuse warning module, including a detection circuit and a warning circuit is provided. The detection circuit is electrically connected to the power circuit of the LED lamp to detect the type of external power supply signal and the current level in the power loop and output the detection signal. The warning circuit is configured to generate a misuse warning based on the detection signal to prompt the user that the LED lamp is connected to an incompatible external power supply.

Abstract: A method and an apparatus for displaying an information flow on a terminal device, an electronic device, a computer-readable storage medium, and a computer program product are provided. An implementation is: in response to detecting an activation operation on an application for displaying the information flow, reproducing, on the terminal device, a first page displayed on the terminal device when the application is last switched to running in the background or closed; and in response to determining that a time interval between the activation operation and the application being last switched to running in the background or closed does not exceed a first threshold, displaying a second page as a continuation of a content entry displayed in the first page, where the second page includes at least one first content entry cached in the terminal device before the activation operation but not displayed in the first page.

Abstract: The present disclosure relates to a hand-gesture-based interaction method and apparatus, and a client. The method includes: in a live stream process of one network live stream, when a function of playback of a hand gesture animation is in an activated state, a client of an anchor user recognizes a hand gesture of the anchor user. When a hand gesture category matches a preset category of the hand gesture animation, the client of the anchor user plays back the hand gesture animation in a first area corresponding to a hand gesture position, and transmits a first content to a client of a viewing user through a first server. The client of the viewing user, based on the first content, plays back the hand gesture animation in a second area corresponding to the hand gesture position, and detects a trigger operation on the second area.

Abstract: An electronic-grade glass fiber composition includes the following components with corresponding amounts by weight percentages 51.0-57.5% SiO2, 11.0-17.0% Al2O3, >4.5% and ?6.4% B2O3, 19.5-24.8% CaO, 0.1-1.9% MgO, 0.05-1.2% R2O=Na2O+K2O+Li2O, 0.05-0.8% Fe2O3, 0.01-1.0% TiO2, and 0.01-1.0% F2. A weight percentage ratio C1=SiO2/B2O3 is 8.1-12.7, a weight percentage ratio C2=B2O3/(R2O+MgO) is 1.7-6.3, and a total weight percentage of the above components is greater than or equal to 99%.

Abstract: A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

Abstract: An LED lamp includes: a lamp shell having a circular cross-section along a central axis of the lamp shell comprising a lamp neck and a sleeve; a heat sink comprising a plurality of fins, sleeving over the sleeve and connecting to the lamp neck; a power source comprising a power board and a plurality of electronic components mounted thereon disposed in the lamp neck and the sleeve; a light board comprising an opening at center portion and disposed at second end of the heat sink and physically and thermally connecting to the heat sink; a plurality of LED chips mounted on the light board and electrically connecting to the power source; and a lamp cover disposed at the second end of the heat sink and covering the plurality of LED chips; wherein the sleeve and the opening of the light board defines a first heat dissipating channel, the plurality of fins and the opening of the light board defines a second heat dissipating channel, the first heat dissipating channel and the second heat dissipating channel share the

Abstract: A video generation method, a video playing method, a video generation device, a video playing device, an electronic apparatus and a computer-readable storage medium are provided. The video generation method includes: acquiring a first video; performing an effect processing on the first video to obtain a second video; superimposing an dynamic effect on the second video to obtain a third video, wherein the dynamic effect comprises a dynamic image that presents a related information corresponding to the first video; and obtaining a fourth video based on the first video and the third video to generate a fourth video, wherein an image of the fourth video comprises a first image and a second image, the first video comprises an image of the first video, and a second image comprises an image of the third video.

Abstract: A flat panel detector is provided, which includes a base substrate and a plurality of detection regions arranged in an array on the base substrate, where each detection region is successively provided with a photosensitive sensor and an optical structure along a direction away from the base substrate; the optical structure includes a condensing unit and a light filtering unit, where the condensing unit is used for receiving the near-infrared light and ambient light emitted by the laser light source and performing condensing, and the light filtering unit is configured to shield the ambient light and transmitting the near-infrared light; a photosensitive sensor which includes an amorphous silicon photodiode and a thin film transistor, where the amorphous silicon photodiode is configured to convert the near-infrared light transmitted by the light filtering unit into an electrical signal.

Abstract: The present invention relates to metal-organic frameworks (MOFs) which contain trimetallic centres with pyrazole as a ligand in the structure thereof. Particularly, it relates to MOFs which contain units of formula (I). The present invention also relates to a photocatalytic method for generating H2 starting from liquid water or vapour using said materials.

Abstract: Process and apparatus (10) are disclosed for capturing and converting an ozone-depleting alkyl halide fumigant from a fumigant/air mixed stream (14) by absorbing it into a metal hydroxide-alcohol buffer solution (26) in an absorber/scrubber (12) to produce a fumigant-free air stream (28). The captured alkyl halide in aqueous alcohol solution can actively react with the metal hydroxide in alcohol solution to produce a value-added product, such as a precipitate metal halide, and another alcohol that further enhances absorption. The absorbing solution is well-mixed with make-up alcohol and alkali streams to maintain the concentration of the metal hydroxide in the desired buffer solution range. The solid precipitate metal halide (52) is separated from the liquid stream, and the metal hydroxide-containing mixed alcohol stream (26) is recycled to the absorber/scrubber (12).