11results about How to "Small fluctuations in performance" patented technology

This invention relates to an intelligent screen printing device, a screen printing system, a control method, and a computer-readable storage medium, belonging to the field of thin-film battery manufacturing technology. The intelligent screen printing device is used for perovskite thin film screen printing and includes: a screen frame for supporting the screen; a tension sensing module disposed on the screen frame for real-time monitoring of the tension distribution in various areas of the screen; a temperature regulation module disposed on the screen frame for heating or cooling the screen; an electrostatic control module disposed above the intelligent screen printing device for generating an ion flow to eliminate static electricity accumulation during the printing process; and a control unit electrically connected to the tension sensing module, the temperature regulation module, and the electrostatic control module, respectively, for receiving monitoring signals and outputting control commands to achieve coordinated closed-loop regulation of tension, temperature, and electrostatics.

This invention relates to the field of heat-resistant alloys and high-temperature alloys, and discloses a high-temperature resistant creep-resistant iron-nickel-chromium-based alloy and its preparation process. The alloy, by weight percentage, comprises Ni 25.0%–28.0%, Cr 18.0%–22.0%, C 0.06%–0.08%, V 0.50%–0.80%, N 0.10%–0.15%, Ce 0.015%–0.025%, B 0.005%–0.010%, Mn 0.3%–0.8%, and Si 0.1%–0.4%, with the balance being Fe and unavoidable trace impurities. The preparation process employs gradient-controlled pressure reverse nitrogen purging, delayed addition of a nickel-cerium master alloy and a micro-carbon boron-iron alloy before tapping, combined with a double-step isothermal carbon consumption treatment. This approach improves the effective utilization rate of nitrogen and rare earth elements, and enhances the high-temperature creep life, fracture elongation, and cross-sectional property consistency of large-section forgings.

The application relates to the technical field of sodium ion battery negative electrode materials, in particular to a closed pore directional regulation and control bamboo-based hard carbon negative electrode material and a preparation method thereof. The method is used for preparing the bamboo-based hard carbon negative electrode material through bamboo material selection and pretreatment, three-stage gradient pre-oxidation, plasma activation, molten salt auxiliary step-by-step carbonization, deep acid pickling purification, and grading ball milling and surface carbonization coating steps, accurately regulates and controls a closed pore structure, reduces defects, improves a carbon yield and batch consistency, is applied to a sodium ion battery, and realizes synchronous improvement of a first circle coulomb efficiency, sodium storage capacity, rate performance and cycle stability.

The application discloses a preparation method and application of a medical sterile gel coupling agent and belongs to the technical field of gel coupling agents for medical examination. First, the in-situ neutralization of acrylic acid is carried out by using the chitosan quaternary ammonium salt in the formula to generate a hydrophilic monomer pre-composite; then the pre-emulsion of the acrylic ester monomer is mixed, and the main network is constructed by initiating copolymerization under an inert atmosphere; subsequently, the tannic acid slurry is introduced in the polymerization later period, and physical crosslinking is realized through the polyphenol structure, so that the medical sterile gel coupling agent is finally prepared. The preparation method and application of the medical sterile gel coupling agent are adopted, through the endogenous neutralization-synchronous complex integrated process, the powerful antibacterial function and the tissue repair function are deeply integrated in the stable gel network, the process makes the key active ingredients produce structure-function synergistic effect, forms an indivisible precision system, and finally the product realizes active antibacterial protection while maintaining excellent imaging performance, and the biocompatibility is excellent.

This invention relates to the field of functional food processing technology, specifically disclosing a functional asparagus powder with high saponin content and its preparation method. The method includes the following steps: asparagus is sliced ​​and microwaved to deactivate enzyme activity; after pulping, a composite regulator aqueous dispersion is added; the pH is adjusted and a cellulose complex enzyme is added for enzymatic hydrolysis; then, it is pre-frozen and vacuum freeze-dried; finally, it is pulverized, sieved, and packaged under a nitrogen atmosphere. The composite regulator can dynamically stabilize and protect saponin molecules through temperature-responsive behavior during processing, significantly reducing thermal degradation. The resulting asparagus powder has a saponin content of 72-85 mg / g and is rich in flavonoids, phenols, and soluble dietary fiber. This product can be used in functional foods that improve sleep. When added at a 4% level to bread, noodles, or meal replacement porridge, animal experiments have verified that it can significantly prolong sleep time and increase the incidence of sleep in mice, exhibiting high nutrient retention and good stability.

This invention provides a short-process manufacturing technology for high-performance titanium-aluminum alloys, relating to the technical field of titanium-aluminum alloy material preparation. The manufacturing technology uses hydrogenated dehydrogenated powder, aluminum-vanadium alloy, and aluminum-niobium alloy as raw materials. Through hydrogenated dehydrogenation powder preparation, cold isostatic pressing, vacuum sintering, and subsequent processing, a uniformly composed titanium-aluminum alloy is prepared. Utilizing the intrinsic brittleness of titanium-aluminum after its self-propagating reaction, and combining the high purity and easily breakable characteristics of aluminum-vanadium and aluminum-niobium master alloys, the technology achieves thorough mixing and refinement of multiple elements under solid-state conditions. This avoids the microstructure inhomogeneity caused by diffusion limitation in high-vanadium and high-niobium systems, and overcomes the problems of component segregation, coarse microstructure, and difficulty in removing inclusions associated with traditional casting methods for preparing titanium-aluminum alloys. Through the powder metallurgy short-process manufacturing design, this technology offers significant technical advantages in reducing raw material and manufacturing costs, improving compositional and microstructure uniformity, enhancing comprehensive mechanical properties, and achieving large-scale production.

This application relates to the field of artificial intelligence technology, and discloses a method and apparatus for collaboratively adjusting the quality of artificial intelligence datasets and model performance. The method includes: one or more iterative operations; the iterative operations include: constructing a preprocessed dataset according to model construction requirements and dataset quality indicator target parameters; performing quality assessment on the preprocessed dataset to obtain dataset quality indicator assessment parameters, and determining a target dataset that passes the quality assessment based on the dataset quality indicator assessment parameters; training the model using the target dataset to obtain a pre-trained model, and performing performance assessment on the pre-trained model to obtain model performance indicator assessment parameters; if the model performance indicator assessment parameters do not meet the preset standard, performing a correlation analysis between dataset quality and model performance based on the model performance indicator assessment parameters, and generating updated dataset quality indicator target parameters based on the analysis results. This achieves collaborative optimization of dataset quality and model performance.

This utility model relates to the field of sampling cone cleaning technology, and discloses a cleaning device suitable for sampling cones, including a housing. A servo motor is fixedly installed on the inner front wall of the housing by a pad. A gear is fixedly sleeved on the output shaft of the servo motor. A gear ring is meshed on the outer surface of the gear. A hollow rotating shaft is fixedly sleeved inside the gear ring. The hollow rotating shaft is rotatably connected to the front end of the housing. A rotating rod is provided at one end of the hollow rotating shaft. This utility model uses nylon bristles to penetrate deep into the cone hole for physical friction. Cleaning liquid is atomized from a liquid nozzle to cover and dissolve stains. Compressed air is blown away by an air nozzle to remove residues. This multi-dimensional and rapid removal of deposits can minimize the risk of physical damage to the sampling cone, significantly improve cleaning efficiency and speed, reduce the difficulty of operation and the skill requirements of the operator, reduce human error, reduce instrument performance fluctuations caused by cleaning differences, reduce accidental damage and replacement frequency of the sampling cone, and save consumable costs.

This application belongs to the field of cable material technology and proposes a method for preparing environmentally friendly, low-smoke, halogen-free polyethylene cable material. High-density polyethylene is melt-grafted with vinyltrimethoxysilane and triethyl borate to form a cross-linked network containing Si-O-B bonds. During combustion, this network pyrolyzes to generate B2O3 and SiO2 nanoparticles. The former melts to form a liquid layer that adsorbs free radicals to inhibit the combustion chain reaction, while the latter forms a eutectic glass phase with B2O3. Combined with ZnO nanoparticles released from the decomposition of a borosilicate-metal chelating agent as a flux, a dense glass-ceramic layer is formed in the carbon layer to isolate oxygen and heat. Simultaneously, ethylene-vinyl acetate copolymer, as a vinyl elastomer, not only improves flexibility through its toughening phase, but its vinyl groups also interact with the Si-O-B bonds of the borosilicate-grafted polyethylene, achieving a comprehensive improvement in flame retardancy, smoke suppression, and mechanical properties.

This invention discloses a three-dimensional positioning method for aerial targets based on distributed ground radar cooperation, comprising: constructing a cross-correlation function by transmitting and echoing signals, and obtaining the range estimate of each ground radar to the target through quadratic fitting; constructing a nonlinear spherical equation system, introducing auxiliary variables for linearization, and iteratively solving it using the Lagrange multiplier method to obtain the initial three-dimensional position estimate of the target; extracting the initial horizontal coordinates, obtaining the altitude correction contribution of each radar based on the geometric relationship between the radar and the target, adaptively selecting the radar with the largest contribution and satisfying the decoupling premise as the optimal correction radar, using its range information to decouple from the spherical range equation to obtain the altitude closed-form solution, and fusing the horizontal coordinates and the corrected altitude to obtain the final three-dimensional position. This invention overcomes the accuracy degradation problem caused by the lack of altitude dimension information and ill-conditioned matrix in traditional algorithms, and significantly improves the three-dimensional positioning accuracy of distributed ground radar for aerial targets.

The application discloses a preparation method of high-entropy MAX phase modified high-strength high-conductivity copper, and belongs to the technical field of metal matrix composite material preparation. The preparation method comprises the following steps: raw material pretreatment, ball milling mixing, calcination reduction, SPS sintering, cooling forming and aging treatment. In the ball milling process, argon protection is adopted to avoid powder oxidation. The powder surface is purified through calcination reduction, and the oxidation impurities of the powder are removed. In the SPS sintering, a two-stage heating process is adopted, that is, the sintering stress is eliminated at 600 DEG C, and then the densification is realized by being heated to 900 DEG C, so that the sintering quality is guaranteed, and the grain coarsening and modified phase growth are inhibited. After the sintering, the bulk composite material is placed in a heat treatment furnace, and is kept at 500 DEG C for 2 hours, and then is rapidly water quenched after the aging treatment is finished, so that the Cr2Nb strengthening phase in the matrix is uniformly dispersed and precipitated, the precipitated phase coarsening is inhibited, and a double strengthening system is formed with the high-entropy MAX phase.