Abstract: A crystal form X of 3?-hydroxy-3?-methyl-21-(4-cyano-1H-pyrazol-1?-yl)-19-nor-5?-pregnan-20-one, a preparation method of said crystal form and an application thereof in preparing a drug for treatment of central nervous system disease.

Abstract: Systems and methods for image processing are provided in the present disclosure. The systems and methods may obtain an image; determine a current resolution level of the image; determine, based on the current resolution level of the image, from a group of resolution level ranges, a reference resolution level range corresponding to the image; determine a target processing model corresponding to the reference resolution level range; and/or determine a processed image with a target resolution level by processing the image using the target processing model, the target resolution level of the processed image being higher than the current resolution level of the image.

Abstract: An electromagnetic braking system and control method, with the system having a CCU, a braking cylinder, a push rod, an electromagnetic braking ring, an electromagnetic braking piston fixed to the push rod, a first shading plate and a second shading plate, a photoelectric sensor fixed near the push rod, and an electromagnetic braking control circuit, and the control method including following the steps: initial estimating of the braking distance (l) according to the current magnitude, electromagnetic force between the two electromagnetic coils and initial velocity (v) of the push rod, arranging a restoration distance (?l) between the top dead center and the piston after braking, installing two shading plates and the photoelectric sensor; and setting the distance between the two electromagnetic coils to when the starts braking.

Abstract: A near-eye display system for pupil expansion based on a diffractive optical element includes: A laser light source or an LED light source; a diffusion sheet, arranged on an emergent light path of the laser light source or the LED light source; a micro-electro-mechanical system (MEMS) scanning mirror, arranged on an emergent light path of the diffusion sheet; a diffractive optical element, arranged on an emergent light path of the MEMS scanning mirror; a collimating lens module, arranged on an emergent light path of the diffractive optical element; a mirror, arranged on an emergent light path of the collimating lens module; and a reflective diffraction structure, arranged on a reflection light path of the mirror such that a human eye sees a superimposed image of a real world and a virtual world.

Abstract: A crystalline form A of 2,2-bis(4-fluorophenyl)-2-phenylacetamide is provided. The crystalline form has good light stability, high temperature stability, and high humidity stability.

Abstract: A crystal form A of 2-(2, 5-dioxopyrrolidin-1yl)ethyl methyl fumarate has a good light irradiation stability, high-temperature stability and high-humidity stability.

Abstract: The present disclosure provides a method, an apparatus, an electronic device, and a computer-readable storage medium for distributing orders. The method may include obtaining attribute information of a service provider and order information of associated orders received by the service provider; obtaining a degree of association between the service provider and each of the associated orders by inputting the attribute information and the order information of the associated orders into an order distribution strategy network; and determining a distribution order for the service provider based on the degrees of association. According to the embodiments of the present disclosure, response rates of the service provider to the orders may be improved.

Abstract: A method for diagnosing secure communication. Before performing a data transmission, a self-diagnosing mode is entered. Error checkpoints are checked to generate a diagnostic status. The diagnostic status is collected. An error handling mode is entered to determine whether an error exists in the diagnostic status. When there is an error, the error is shielded. The method for diagnosing secure communication solves the problem of image burn-in, and further reduces the use of non-volatile memory. Therefore, the size and function utility of the integrated circuit can be further reduced.

Abstract: An apparatus for efficiently preparing spherical metal powder for 3D printing includes a housing, a crucible and a powder collection area arranged in the housing, wherein a turnplate arranged in the collection area is an inlaid structure. A material having a poor thermal conductivity is selected as the base of the turnplate, and a metal material having a wetting angle less than 90° with respect to droplets is selected and embedded into the base to serve as an atomization plane of the turnplate. An air hole is disposed in the turnplate. The spherical metal powder for 3D printing combines electromagnetic force breaking capillary jet flow and centrifugal atomization, which breaks through the traditional metal split mode, and makes the molten metal in a fibrous splitting.

Abstract: Provided is crystal form A of N, N?-(10, 17-dioxo-3, 6, 21, 24-tetraoxa-9, 11, 16, 18-tetrazohexahexane-1, 26-di-yl)bis(4-(6, 8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinoline-4-yl) benzene sulfonamide. The crystal form has good light stability, high-temperature stability, and high-humidity stability.

Abstract: The present disclosure provides compositions, methods, kits, systems and apparatus that are useful for nucleic acid polymerization. In particular, modified polymerases and biologically active fragment thereof are provided that allow for nucleic acid amplification. In one aspect, the disclosure relates to modified polymerases useful for nucleic acid sequencing, genotyping, copy number variation analysis, paired-end sequencing and other forms of genetic analysis. In some aspects, the disclosure relates to modified polymerases useful for the generation of nucleic acid libraries or nucleic acid templates for use in various downstream processes. In some aspects, the disclosure relates to the identification of homologous amino acid mutations that can be transferred across classes or families of polymerases to provide novel polymerases with altered catalytic properties. In some aspects, the disclosure provides modified polymerases having enhanced catalytic properties as compared to a reference polymerase.

Abstract: The present invention relates to a process for producing a polyurethane elastomer, a polyurethane elastomer produced by the process, and the use of the polyurethane elastomer in a glass encapsulation/elastic gasket or the like. The process mainly includes adding a hindered amine light stabilizer to the isocyanate-containing component A. Its reaction with the organotin catalyst in the isocyanate reactive component (i.e. component B), which may cause a loss of the catalytic performance of the catalyst, is avoided. The curing speed of the polyurethane elastomer is increased, thereby the production efficiency is improved and costs are reduced.

Abstract: Embodiments of the present disclosure relate to a method and apparatus for recognizing a table, a device, and a medium. An embodiment of the method can include: detecting a table on a target picture, to obtain a candidate table recognition result; extracting a merging feature of the candidate table recognition result, and determining a to-be-merged row in the candidate table recognition result based on the merging feature; extracting a direction feature of the to-be-merged row, and determining a merging direction of the to-be-merged row based on the direction feature; and adjusting the candidate table recognition result based on the to-be-merged row and the merging direction of the to-be-merged row, to obtain a target table recognition result.

Abstract: A tebuconazole polymorph and a preparation method therefor are described. In particular, a polymorph of (RS)-1-(4-chloropheny)-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl) pentan-3-ol, a preparation method therefor and use thereof are provided. The tebuconazole polymorph has a high purity and excellent crystallization properties, is stable under high humidity, high temperature and light conditions, has excellent solubility, and has high processing properties for formulations, high biological activities and good sterilization effects. The preparation method is simple, has stable processes, and can be implemented on a large scale. The polymorph can greatly improve the quality control and industrial application of tebuconazole-containing pesticides.

Abstract: Disclosed are information transmission method, apparatus, device and medium for medical imaging application. The method includes: an imaging device corresponding to an application authorization request is determined according to the received application authorization request, and an application permission profile of the imaging device is acquired; and a medical imaging application corresponding to the imaging device is determined according to the application permission profile of the imaging device, and medical imaging application information corresponding to the medical imaging application is transmitted to the imaging device.

Abstract: The present invention discloses an electromagnetic braking system and control method, the system comprises a CCU, a braking cylinder, a push rod, an electromagnetic braking ring, an electromagnetic braking piston fixed to the push rod, a first shading plate and a second shading plate, a photoelectric sensor fixed near the push rod, and an electromagnetic braking control circuit. The control method includes following steps: initial estimating the braking distance l according to the current magnitude, electromagnetic force between the two electromagnetic coils and initial velocity v of the push rod, arranging a restoration distance ?l between the top dead center and the piston after braking, installing two shading plates and the photoelectric sensor; setting the distance between the two electromagnetic coils to L=l+?l when starting the braking.

Abstract: The direct heating vaporizer of present invention primarily consists of a tube, a heating chamber and a material chamber located inside the tube. A filter unit connects the heating chamber and the material chamber; the filter can be replaced. A heating net inside the heating chamber produces heat to heat up the tobacco or other vaping medium directly when activated and controlled by a temperature sensing and control unit. Such direct heating mechanism results in shorter heating time and evenly heating applied to the vaping medium by the mechanism of air being heated up then sent to the material chamber to closely surround and heat up the vaping medium for a user's enjoyment.

Abstract: Kinship between electronic files among personal networked devices may be ascertained between the files by determining an operational relationship between the files and with a similarity measurement.