Abstract: Provided are a CT scanning method and system, an electronic device, and a computer-readable storage medium. The method includes: determining a first coordinate of a mark point of a part to be imaged in a dual-camera coordinate system; converting the first coordinate into a second coordinate of the mark point in a CT coordinate system according to coordinate system transformation parameters; generating first locating information according to the second coordinate to drive a scanning table to move to a first location designated by the first locating information; obtaining projection images of the part to be scanned; determining second locating information and scanning information of the part to be scanned according to the projection images; and driving the scanning table to move to a second location designated by the second locating information according to the second locating information and performing CT scanning according to the scanning information.

Abstract: The present application proposes a method and apparatus for transfer learning-based localization of igneous carbonate-hosted rare earth mineralization. The technology relates to electromagnetic exploration and includes obtaining exploration data for electric, magnetic, seismic, and gravity methods in the target area. Transfer learning-based localization is applied to the electric, magnetic, seismic, and gravity exploration data to determine the cross-sectional map corresponding to the anomalous position of igneous carbonate-hosted rare earth mineralization in the target area. Feature decomposition dimensionality reduction, feature enhancement, and weighted fusion processing are applied to the cross-sectional map, followed by segmentation of the igneous carbonate-hosted rare earth mineralization geological body in the fused image to obtain the spatial distribution of the detection target.

Abstract: This application relates to an enclosure frame, a battery, an electric device, and a method and device for manufacturing enclosure frame, and pertains to the field of battery technologies. The enclosure frame is applied to a battery. The enclosure frame includes: a pair of side plates, where the pair of side plates are disposed opposite each other in a first direction; and a pair of end plates, where the pair of end plates are disposed opposite each other in a second direction perpendicular to the first direction, and the end plates are disposed between the pair of side plates. The enclosure frame has high assembly quality and high production efficiency.

Abstract: An entering-into-box device for placing a target member into a box body are provided by embodiments of the present application. The entering-into-box device includes a main structure, a first positioning assembly, a second positioning assembly and a third positioning assembly. The main structure includes a mounting face; the first positioning assembly is connected to the mounting face; the second positioning assembly is connected to the mounting face and distributed at an outer peripheral side of the first positioning assembly; the third positioning assembly extends in a first direction and is connected to an end of the main structure. The first positioning assembly positions the target member in the first direction; the second positioning assembly positions the target member in a second direction and a third direction; and the third positioning assembly positions the box body at least in the second direction and the third direction.

Abstract: A battery case includes a housing, an end cap and a sealing member, wherein the housing has an open end, the end cap fits with the housing and covers the open end, the end cap is provided with a groove and a sealing region, the groove is arranged facing away from the housing, the sealing region is arranged on a peripheral surface of the end cap and corresponding to an inner side wall of the groove, and the sealing member is arranged between an inner wall of the housing and the sealing region.

Abstract: Provided are a battery and an electric device, belonging to the field of battery technologies. The battery includes: a plurality of battery units, the plurality of battery units being arranged in a first direction; and a bundling assembly, the bundling assembly including a plurality of bundling members and first protective members; the plurality of bundling members being provided in correspondence with the plurality of battery units, and each of the bundling members being configured to bundle a corresponding battery unit; and each first protective member connecting two adjacent bundling members to limit deformation of the bundling members.

Abstract: Provided are a geological target identification method and apparatus based on image information fusion.

Abstract: A line current iM(k0) of an M side of a first direct-current transmission line is collected at a moment k0. A line current iM(k0?ts) thereof is collected at k0?ts. At a moment k0, a differential value diM(k0) of a current of the side of the first direct-current transmission line is calculated according to the line current iM(k0) and the line current iM(k0?ts). It is determined whether the differential value diM(k0) of the current meets a protection enabling criteria. If so, direct-current protection for the M side of the first direct-current transmission line is enabled. A line current iM(j) of the M side of the first direct-current transmission line is collected at a moment j. A line current iM(j?ts) thereof is collected at a moment j?ts. A differential value diM(j) of the current of the M side of the first direct-current transmission line at the moment j is calculated according to the line current iM(j) and the line current iM(j?ts).

Abstract: A method and device for timing in time-varying distance protection based on multiple lines of a tower. The method includes: collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters; calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result; calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time of a section-II distance protection action and final time of a section-III distance protection action; and determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time of the section-II distance protection action.

Abstract: Disclosed are a direct-current transmission line protection method and system based on pure current characteristics.

Abstract: A method and device for timing in time-varying distance protection based on multiple lines of a tower. The method includes: collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters; calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result; calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time of a section-II distance protection action and final time of a section-III distance protection action; and determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time of the section-II distance protection action.

Abstract: Disclosed are catalyst compositions for isoprene polymerization formed from components comprising (A) at least one titanium halide; (B) at least one organic aluminum compound comprising at least one alkyl aluminum of formula AlR3, wherein each of the three Rs is independently chosen from linear and branched C1-6 alkyl groups; and (C) at least one electron donor comprising at least one polyether compound of formula (I) and/or at least one tetrahydro-furfuryl ether compound of formula (II). Also disclosed are processes for preparation of the catalyst compositions and processes using the catalyst compositions for isoprene polymerization.

Abstract: Disclosed are catalyst compositions for isoprene polymerization formed from components comprising (A) at least one titanium halide; (B) at least one organic aluminum compound comprising at least one alkyl aluminum of formula AlR3, wherein each of the three Rs is independently chosen from linear and branched C1-6 alkyl groups; and (C) at least one electron donor comprising at least one polyether compound of formula (I) and/or at least one tetrahydro-furfuryl ether compound of formula (II). Also disclosed are processes for preparation of the catalyst compositions and processes using the catalyst compositions for isoprene polymerization.