24results about How to "Small fluctuations in performance" patented technology

The invention belongs to the technical field of high-voltage electric appliance material preparation, and particularly relates to a zinc oxide resistor disc and a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-sintering zinc oxide powder; (2) mixing the zinc oxide powder obtained in the step (1), an auxiliary agent and a dispersion liquid, and carrying out ball milling to obtain slurry; the particle size D50 of the slurry is 0.8-1.2 [mu] m, and the dispersity is greater than or equal to 95%; (3) performing spray drying and granulation on the slurry to obtain granulation powder; (4) carrying out molding and first sintering on the granulated powder to obtain a resistor disc semi-finished product; the first sintering adopts sectional sintering; and (5) forming an electrode layer on at least one surface of the resistor disc semi-finished product by adopting a vacuum sputtering and / or electrophoretic deposition process, and performing secondary sintering and annealing. The contact resistance of the zinc oxide resistor disc is less than or equal to 5m omega; and after 1000 hours of aging in a 85 DEG C + 85% RH environment, the leakage current increase is less than or equal to 2 [mu] A, and the performance degradation rate is less than or equal to 5%.

The invention relates to a transparent software updating method and device based on program entity activity modulation, and the method comprises the steps: obtaining state data and service dependence topology of a software component in real time, the state data comprising CPU usage rate, memory usage rate, network throughput and response time; based on the trained prediction model and the current state data, predicting the state data of the software component at the next moment to obtain predicted state data; calculating the activity degree of each software component based on the prediction state data, and determining the state classification of each software component; outputting an update decision through request analysis, window scoring and sequence planning based on the service dependency topology, the prediction state data and the state classification of each software component; the updating decision comprises updating time, an updating sequence and a resource demand; and executing transparent updating based on the updating decision. According to the invention, through prediction of the service dependence topology and the real-time state data, the stability and reliability of transparent updating and the resource utilization rate are improved.

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 discloses a corona-resistant insulating varnish for enameled wire and its preparation method, belonging to the technical field of insulating coatings. The raw materials for preparing the corona-resistant insulating varnish for enameled wire include aromatic tricarboxylic anhydride, aromatic diisocyanate, and hydroxyl-modified composite nanoparticles; the hydroxyl-modified composite nanoparticles comprise silica nanoparticles and layered double hydroxides. This invention significantly increases the hydroxyl modification density by introducing layered double hydroxides and silica composites, enabling the composite particles to be covalently anchored to the prepolymer backbone through esterification, resulting in uniform release after curing. This achieves a balance between storage stability and curing uniformity, making it suitable for enameled wire applications in high-voltage motors.

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 invention discloses a preparation method of a polyvinylidene fluoride based composite material of a magnetic drive pump key component, and relates to the technical field of polymer composites.The preparation method comprises the specific steps of raw material modification treatment, component premixing, melt blending extrusion, mold pressing cooling forming and plasma aftertreatment. The PVDF resin is subjected to graft modification, the carbon fibers are sequentially subjected to oxidation and silane coupling agent dipping treatment, and the filler with the specific function is matched and premixed, so that bonding of adaptive interfaces of a matrix, a reinforced phase and the functional filler is promoted, and it is guaranteed that components are uniformly distributed and consistent with the internal structure; a compact structure is formed through melt blending, gradient pressure mold pressing and segmented cooling forming, and the surface state is optimized in combination with plasma aftertreatment, so that the material adapts to the stress requirement of key components of the magnetic drive pump and resists severe working conditions, performance fluctuation caused by environmental factors is reduced, and long-term stable operation of the components is guaranteed.

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.

The application discloses a sleep apnea severity prediction method based on a single-channel blood oxygen signal and belongs to the technical field of medical artificial intelligence. The prediction method comprises the following steps: acquiring a single-channel blood oxygen saturation signal and demographic characteristics of a target object; performing preprocessing and signal feature extraction operations on the single-channel blood oxygen saturation signal to obtain a signal feature set of the target object; inputting the feature set of the target object into a trained double-branch joint sleep apnea severity prediction model based on multi-scale width learning; outputting a preliminary apnea hypopnea index estimation value through a regression branch; outputting an interval probability distribution through a classification branch; fusing features through a joint regression unit to obtain a final prediction value and a severity classification. The application can realize accurate prediction of sleep apnea severity based on a single-channel blood oxygen signal, has the advantages of low model complexity, strong interpretability and efficient operation on a CPU, and is suitable for clinical portable screening scenes.

The invention provides a cemented filling material with a large mixing amount of fly ash and high shear bearing capacity and a preparation method of the cemented filling material, and relates to the technical field of mine filling. The cemented filling material comprises the following raw materials in percentage by mass: 70-80% of a solid material and 20-30% of water, wherein the total mass of the raw materials is 100%; the solid material comprises the following components in parts by weight: 55-70 parts of fly ash, 2-5 parts of cement, 5-15 parts of slag, 2-5 parts of carbide slag, 21-35 parts of tailings, 0.1-1 part of a fiber material and 1-3 parts of a composite activator. The cementing filling material breaks through three aspects of improving the activity of the fly ash through synergistic excitation modification, optimizing the structure through aggregate particle gradient grading design and reducing performance fluctuation through intelligent process control, so that efficient activation excitation of the volcanic ash activity of the fly ash can be realized, the mixing amount of the fly ash is increased, and the cost of the filling material is reduced; the problem that an existing filling material is low in anti-shearing bearing capacity is solved.

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.

The utility model is applicable to the related technical field of transformers, and provides a copper-clad aluminum high-current output planar transformer, which comprises a magnetic core and a base embedded in the magnetic core, a coil and a PCB (printed circuit board) are further arranged in the magnetic core, and an output piece connected with the PCB is arranged on the base. The total cost of the product is 40% lower than that of a copper pin; the bottom is suspended, and the coil is directly contacted with the air to easily dissipate heat; the secondary output end adopts two rows of copper-clad aluminum pins to realize shunting, so that eddy-current loss can be effectively reduced; used materials are simple, assembly is convenient, and large product performance fluctuation caused by inconsistent materials and manual operation can be reduced to a great extent; the coil and the PCB are alternately combined for four times, so that coupling between the primary and the secondary is enhanced, and the working efficiency of a product is improved; and the output end adopts two rows of copper-clad aluminum pins, the inner row is a straight pin, the outer row is a bent pin, and large-current output is realized by adopting shunt connection.

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.

The invention discloses a manufacturing method of a thin-film acoustic metamaterial composite sound insulation board, relates to the technical field of noise control, and aims to solve the problems that an existing thin-film acoustic metamaterial sound insulation board is narrow in sound insulation frequency band, core components are prone to damage, the structure is unstable, the machining precision is low, and the process adaptability is poor. The sound insulation plate comprises a porous sound absorption plate, a micro-perforated plate, a reinforcing grating and a protective layer, the reinforcing grating is of a frame type structure, the porous sound absorption plate is mounted in the reinforcing grating in a filling manner, the porosity of the porous sound absorption plate is linearly decreased from outside to inside, and the micro-perforated plate and the protective layer are sequentially mounted on the outer surface of the reinforcing grating filled with the porous sound absorption plate; the base plate comprises protective layers, clamping plates and a resonance film set, the resonance film set is composed of 2-3 layers of sound insulation films, an elastic damping layer is arranged between every two adjacent sound insulation films, the resonance film set is arranged between the two clamping plates, and the protective layers are arranged on the outer walls of the two clamping plates; the base layer plate is arranged between the two layers of sound insulation plates which are symmetrical in structure, and the reinforcing grating filled with the multi-hole sound absorption plates is connected with the protective layer of the base layer plate. 20-1600Hz broadband efficient sound insulation is realized, the structure is stable and durable, the product consistency is good, the weight is light, and the construction is easy.

The application discloses a finishing method of machine-washable silk fabric, and relates to the technical field of textile fabric finishing control, which is executed by a continuous silk fabric finishing production line comprising a feeding section, a padding section, a pre-drying section, a baking section and a cooling section. The surface texture image of the fabric to be finished in the feeding section is collected, the warp and weft interlacing feature points are extracted and mapped to the padding section roller pressure control grid to generate initial pressure distribution data; the initial pressure distribution data is used to calculate the start-stop state code of the infrared radiation array emission unit in the pre-drying section to control the heat energy output mode; the frequency of the hot air circulating fan in the baking section is adjusted in response to the code, the air pressure feedback value is recorded, the rotating speed parameter of the cooling section cold water roller group is set based on the value, and the whole process is started. The method realizes accurate control and parameter linkage of the finishing section, and ensures the uniform and stable finishing state of the silk fabric.

The invention relates to a steel structure performance prediction method and system based on a multi-modal large model, and belongs to the technical field of steel manufacturing. The method solves the problem that traditional cooling parameter control depends on artificial experience and is low in precision. According to the technical scheme, a historical knowledge base is constructed by collecting steel whole-process technological parameters and mechanical property data, the similarity between to-be-predicted data and historical cases is calculated to screen reference cases, a prompt is constructed and input into a large language model for training prediction, and optimized water tank parameters are output. The system comprises a data collection module, a data processing module, a similarity calculation module, a case screening module, a prompt construction module, a model training prediction module and a deployment maintenance module. According to the method, accurate prediction of the cooling parameters can be realized, and the steel performance consistency and the production efficiency are remarkably improved.

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.

The invention discloses high-performance polypropylene and a preparation method thereof, and relates to the technical field of high polymer material modification. The preparation method comprises the following steps: etching glass beads, modifying with silane, and reacting with vinyl silicone oil emulsion to prepare reactive core-shell reinforced phase particles; then mixing homo-polypropylene, block co-polypropylene, the reactive core-shell reinforced phase particles and other auxiliaries to prepare a premix, adding a cross-linking agent and an initiator, and performing extrusion through a twin-screw extruder to prepare primary master batches; and finally, carrying out multi-stage dynamic cross-linking reaction, supercritical carbon dioxide treatment, beta-crystal nucleating agent addition and annealing to obtain a finished product. The problems that traditional modified polypropylene is unbalanced in rigidity and toughness, poor in interface compatibility and unstable in performance are solved, the finished product has excellent tensile property, impact toughness and heat resistance, the process is stable, the product is matched with existing equipment, and the product can be widely applied to the fields of automobiles, electronics, buildings and the like and has good popularization value.

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 invention discloses NAS microcrystalline glass powder and a preparation method thereof, and relates to the technical field of microcrystalline glass. The preparation method comprises the following steps: providing sol, wherein the sol is prepared from the following components in parts by mass: 12 to 15 parts of aluminum silicate, 7 to 9 parts of NaOH, 60 to 70 parts of water, 1.0 to 5.8 parts of nano gas-phase SiO2 and 1 to 1.3 parts of TiO2; and drying the sol, heating the obtained dry gel to 750-850 DEG C at a heating rate of 3-5 DEG C / min, carrying out heat preservation for 0.5-1 h, cooling to room temperature, and carrying out crushing and ball milling on the obtained NAS glass ceramic block to obtain the NAS glass ceramic powder. The sol-gel combined one-time low-temperature sintering and recrystallization process is adopted, the energy consumption is low, the steps are simple, and the prepared NAS microcrystalline glass is uniform in component, high in density, crystallinity and mechanical strength and low in thermal expansion coefficient and dielectric loss.

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.

The utility model discloses a kind of DC motor control panel mounting structures, comprising: the plastic package of plastic package post-stator and control panel main part of direct-current brushless motor, the control panel main part is installed in the inside of plastic package post-stator, and control element, drive circuit module and terminal interface are integrated on control panel main part;Positioning structure is set in the inner wall of the plastic package post-stator, and positioning structure includes locating post, the locating hole is opened in the control panel main part, and locating post is inserted into the inside of locating hole when control panel main part is installed in plastic package post-stator inside.The whole round control panel is improved to semicircle, and the control panel body of semicircle design reduces material use compared with traditional whole round control panel, and production cost is significantly reduced.