Abstract: Disclosed are a polyvinyl thioether ester, a preparation method therefor and use thereof. The polyvinyl thioether ester is obtained by subjecting a binary acetylenic acid ester-based internal-alkyne monomer and a dithiol monomer as starting materials to a solution polymerization reaction. The staring materials of the polymerization reaction are easy to obtain, and no by-products are produced during the process of the polymerization reaction. The polymerization reaction has a wide substrate applicability and a good functional group compatibility, such that various functional groups can be conveniently introduced. No catalyst is used in the polymerization reaction, and, the influence of a catalyst residue on the optical and electrical properties and the biological properties of a polymer material can be eliminated.

Abstract: The invention provides a method for nonlinear compensation of coherent high-capacity high-order QAM system, including: deploying an OPC on an intermediate link of communication between a transmitter and receiver, and performing phase conjugation on a transmitted signal based on the OPC to generate idler; performing phase recovery on a compensated signal at the receiver to obtain a constellation diagram, simulating a nonlinear function relationship between a transmitted signal and a received signal by using a trained and learned CVDNN, and performing nonlinear compensation on the constellation diagram to obtain the compensated constellation diagram; and calculating a Q-factor based on the compensated constellation diagram, and evaluating communication performance by the Q-factor. Nonlinear compensation is performed on a transmitted signal by using an OPC+CVDNN method to equalize nonlinear degradation of an optical fiber in a WDM coherent optical communication system.

Abstract: An annular hollow offset-focus laser cladding device, including a housing, a conical reflector arranged in the housing, an annular off-axis parabolic focusing mirror opposite to and arranged coaxially with the conical reflector, a nozzle installed below the conical reflector and a powder-spraying tube connected to a lower end of the nozzle. A top of the housing is provided with a light entrance; the conical reflector faces the light entrance; The powder-spraying tube is coaxial with the annular hollow offset-focusing light reflected by the annular off-axis parabolic focusing mirror; a collimating protective gas jacket is arranged on a periphery of the powder-spraying tube, and the collimating protective gas jacket is located between the annular hollow offset-focused light and the powder-spraying tube; the annular off-axis parabolic focusing mirror is configured to create a horizontally offset of parent parabola focus.

Abstract: The invention relates to a quality of service (QoS)-aware parallel flexible Skyline service discovery method, including: performing, by each parallel node, a tournament selection algorithm to trim candidate services inside the parallel node; then making each parallel node perform a block dominance algorithm to filter candidate services inside the parallel node to obtain local Skyline services; collecting all local Skyline services to form a first set, and then performing filtering on the first set by using the block dominance algorithm to obtain global Skyline services; and determining whether there is a first constraint in the global Skyline services, and if yes, performing processing by using a flexible Skyline service correction algorithm to obtain a flexible Skyline service set for output, or otherwise, directly outputting the global Skyline services.

Abstract: The present disclosure relates to use of Rivastigmine in the preparation of an anti-radiation medicament, and belongs to the field of medical technology. The present disclosure provides use of Rivastigmine in the preparation of an anti-radiation medicament. Researches show that Rivastigmine significantly promoted the proliferation of Lgr5+ stem cells receiving 10 Gy radiation (after being irradiated with 10 Gy radiation for 10 d, Lgr5+ stem cells cultured in a Rivastigmine-containing culture solution had an increment 14.2 times of that of the Lgr5+ stem cells cultured in a Rivastigmine-free culture solution). Rivastigmine also significantly reduced the mortality of mice after being irradiated with 10 Gy radiation (after receiving 10 Gy whole body irradiation, all the mice not intraperitoneally injected Rivastigmine died within 10 d; and for the mice intraperitoneally injected Rivastigmine, the survival rate of the mice was still greater than 40% 30 d later), and thus might have good radiation-proof effect.

Abstract: The present invention relates to a method for depositing a horizontal rib on an unequal-height section by laser cladding, including the following steps: providing an unequal-height section and a laser cladding device, determining a deposition position on the unequal-height section, and determining a length of a rib on the unequal-height section according to the deposition position; using a lowest point of the deposition position as a first segment of the rib and a highest point as a last segment of the rib; determining a number of segments of the rib according to the length and a vertical height of each segment of the rib; determining a cladding speed of each segment of the rib according to a relationship between a cladding height of each segment of the rib and a scanning speed under a certain parameter, and carrying out laser cladding to obtain a horizontal rib.

Abstract: The low-field nuclear magnetic resonance (LF-NMR) is used in the design of a formula of a water-based printing ink and selection of the water-based printing ink or a wetting agent. The water-based printing ink or the wetting agent is quickly selected through the inversion data of an LF-NMR transverse relaxation time (T2). By using LF-NMR to detect the distribution of water in the water-based printing ink or wetting agent, the water-based printing ink is quickly detected in real-time and a high-quality water-based printing ink is selected, which contributes to the design and development of water-based printing inks. The state of water in the ink also is adjusted based on the relationship between the distribution state of water in the printing ink and the definition of the printed pattern, thereby ensuring the definition of the printed pattern.

Abstract: A wearable passive sweat detection device includes at least one detection sensor that includes: a base plate; a sensing element provided on the base plate, the sensing element including a sweat collection portion and a sweat self-driven detection portion, the sweat collection portion being configured to collect sweat discharged by sweat glands of skin, the sweat self-driven detection portion including a guide portion of a semi-conical structure, a test electrode provided on an outer conical surface of the guide portion, and a back electrode, and a narrow end of the guide portion facing the sweat collection portion; and a test element connected with the test electrode and back electrode. The adoption of the conical structure achieves a liquid-solid friction effect to realize passive detection of sweat components; meanwhile, flexibility is realized to facilitate wearing; by using different ion selective films, different ion concentrations can be detected; detection precision is high.

Abstract: Provided is a method for implementing compiled embedded Python. The method comprises: traversing an abstract syntax tree of Python source code to obtain semantic information about a program and generating corresponding C++ code according to said semantic information (S1); performing type annotation of the Python source code and thus generating C++ variable definitions and function definitions (S2); using a translator to translate into C++ source files the Python source code processed in the steps described above (S3); storing said C++ source files together with embedded chip-related files to form a file package, and compiling and linking said file package and generating an ASCII text file (S4). The method implements a source code translator on the basis of type annotations and static analysis, and integrates the translator into an embedded platform, enabling the editing, compiling, linking, and programming of Python source files.

Abstract: Superhydrophobic electrothermal epoxy composites, their preparation and a self-healing method are disclosed. 1,4,5-oxadithiepane-2,7-dione and methylhexahydrophthalic anhydride were mixed and cured with epoxides to get self-healable epoxy resins; carbon nanotube/self-healable epoxy resin prepolymers were coated on self-healable epoxy resins and cured to get electrothermal epoxy composites; modified superhydrophobic copper powders were adhered on electrothermal epoxy composites and cured to get a kind of superhydrophobic electrothermal epoxy composites. The thermal resistance of superhydrophobic electrothermal epoxy composites is superior to existed technical solutions and they can simultaneously repair cracking and delamination and the healed samples still exhibit excellent superhydrophobicity.

Abstract: An embodiment of the present invention discloses a monitoring and repair method for a planetary exploration parachute system. The monitoring and repair method includes: sensing an impact force of dust and generating a sensing signal by a sensor; receiving the sensing signal by an electrode in a fuse; and when the sensing signal is greater than a preset threshold, fusing a safety wire in the fuse; after the safety wire is fused, changing a spring in the fuse from a compressed state to a natural state to generate tension; and rotating a repair rod under an action of the tension to drive a folding piece to be changed into an unfolded state from a folded state, thus realizing precise evaluation of impact damage of dust particles to a parachute body, closed-loop control and real-time self-repair.

Abstract: A visual analysis method for cable element identification includes steps of constructing and labeling a picture data set, preparing a training data set and training a model, to train the preset identification and analysis model, such that the preset identification and analysis model can have accuracy of identification of cable elements; then, cable element information existing in a target image screen is identified by the completely trained preset identification and analysis model, so as to label a target picture; in the analysis method, the produced and manufactured cable elements can be shot, and then, shot pictures are identified and analyzed by using the preset identification and analysis model, such that a structural quality condition of each cable element is rapidly and comprehensively determined, possible structural defects of each cable element can be conveniently and accurately known, and the cable elements with unqualified quality can be screened out in time.

Abstract: A flexible assembly system includes an industrial personal computer, a data collection card, a motion control card, a six-degree-of-freedom assembly platform, a first visual platform, a second visual platform and a supporting platform. The six-degree-of-freedom assembly platform includes a four-degree-of-freedom motion platform and a two-degree-of-freedom adjustment device, the two-degree-of-freedom adjustment device includes a two-degree-of-freedom motion platform and a clamping mechanism, and the clamping mechanism includes an outer frame, a flexible wrist rotatably connected in the outer frame, two clamping sheets mounted on the flexible wrist, two driving parts corresponding to the two clamping sheets, two first force sensors provided on the outer frame and two second force sensors provided on the flexible wrist; a first image collection apparatus is mounted on the first visual platform, and a second image collection apparatus is mounted on the second visual platform.

Abstract: An LED panel light includes a flexible base film, a plurality of circuits arranged on the flexible base film and a plurality of LED lamp beads arranged on the flexible base film, each circuit is connected with at least one LED lamp bead and is provided with at least two mutually parallel conductive wires. The conductive wire consists of a plurality of secondary conductive wires, and a plurality of the secondary conductive wires form a mesh. A method of making a LED panel light includes the following specific steps: S1: providing a flexible base film; S2: manufacturing a plurality of mesh-type conductive wires on the flexible base film by using a mould with circuit patterns of LED panel light; conductive wires forming a circuit, and a plurality of the circuits forming an LED panel light circuit; S3: connecting LED lamp beads with the conductive wires in the circuits.

Abstract: A preparation method of an interfering peptide targeting SARS-CoV-2 N protein includes the following steps: designing an interfering peptide segment targeting amino acids located in a dimerization domain of the SARS-CoV-2 N protein; fusing the interfering peptide segment with HIV-TAT; modifying the interfering peptide segment fused with HIV-TAT into a reverse isomer to obtain an amino acid sequence of a final interfering peptide NIP-V; and synthesizing the interfering peptide NIP-V using D-amino acids as raw materials. The above-mentioned interfering peptide drug NIP-V is able to interact with the dimerization domain of the SARS-CoV-2 N protein, inhibit the oligomerization of N protein, and then relieve the inhibition for innate immunity by the N protein, so as to achieve the purpose of inhibiting the replication of SARS-CoV-2 virus in cells and animals.

Abstract: The present invention relates to an application of 4-MePhNHLi, in particular, to an application of 4-MePhNHLi in catalyzing hydroboration reaction of imine and borane. A catalyst, borane, and imine are stirred and mixed uniformly in sequence for reaction for 1-2 hours, the reaction is terminated by exposure to air, and the solvent in the reaction liquid is removed under reduced pressure to obtain borate esters having different substituents. According to the present invention, 4-MePhNHLi can catalyze hydroboration reaction of imine and borane at high activity at room temperature, the amount of catalyst is only 4-5 mol % of the molar mass of imine, and the reaction can reach a yield of more than 90%; compared with an existing catalytic system, simple 4-MePhNHLi is used, the reaction conditions are mild, and the yield of borate esters having different substituents can reach 99% in optimized conditions.

Abstract: A long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick belongs to the field of steelmaking technologies using powder-bottom-injecting converters. According to equipment characteristics, process characteristics, and erosion characteristics of the powder-bottom-injecting converter, the design, arrangement, installation, use, maintenance, and replacement of the bottom purging/powder injection bricks are systematically optimized and improved, a technology of automatically detecting the erosion height of bottom purging bricks is adopted, and hot replacement of bottom purging/powder injection bricks and hot replacement of the converter furnace bottom are used collaboratively, which not only can prolong the service life of a single bottom purging/powder injection brick, but also can greatly prolong the overall life of the powder-bottom-injecting converter from 1000-3000 heats in the prior art to 6000-10000 heats.

Abstract: Disclosed is a triboelectric nanogenerator-based biochemical droplet reaction device, which includes a reaction generating part and a power generation part. The power generation part includes a triboelectric component and a rectifier circuit. The triboelectric component includes a drive electrode, a substrate, a first friction electrode, a first friction material, a second friction material, and a second friction electrode arranged in sequence from top to bottom. A gap exists between the first friction material and the second friction material. The first friction electrode is connected to the first friction material. The second friction electrode is connected to the second friction material. The drive electrode, the first friction electrode, and the second friction electrode are all connected to the rectifier circuit. Also disclosed is a reaction method.

Abstract: The use of a muscle stem cell in the preparation of a drug for preventing, alleviating and treating metabolic disorders, and a pharmaceutical composition for humans and animals, wherein the pharmaceutical composition comprises the muscle stem cell as a first active ingredient, a second active ingredient for regulating the glucose metabolism, and a pharmaceutically acceptable carrier.

Abstract: The invention provides an adaptive manifold probability distribution-based bearing fault diagnosis method, including constructing transferable domains and transfer tasks; converting a data sample in each transfer task into frequency domain data via Fourier transform, inputting the frequency domain data into a GFK algorithm model, and calculating a manifold feature representation matrix related to a bearing fault in each transfer task by using the GFK algorithm model; calculating a cosine distance between centers of a target domain and a source domain in each transfer task according to a manifold feature representation, and defining a target function of in-domain classifier learning; then solving the target function, to obtain a probability distribution matrix of the target domain; and selecting a label corresponding to the largest probability value corresponding to each data sample in the target domain from the probability distribution matrix as a predicted label of the data sample in the target domain.