17results about How to "Small dispersion" patented technology

The application discloses an automatic riveting device and method for a launch engine nozzle cover, and belongs to the technical field of engine nozzles. The device comprises a riveting base, an X / Y module, a first rotating platform, a riveting positioning tool, a rotating cylinder, a stand, a Z-axis module, a second rotating platform, a precise force control push rod and a riveting head. The nozzle seat is arranged on the riveting positioning tool, and one nozzle cover to be riveted is arranged on each supporting column of the riveting positioning tool. The automatic riveting method is adopted, a plurality of launch engine nozzle covers can be riveted at one time, the working efficiency is greatly improved, and the speed, the pressure, the stroke and other parameters can be adjusted, and the riveting quality consistency of the nozzle cover is improved.

The invention discloses a refrigerant dynamic charging process based on complete machine simulation operation, and belongs to the technical field of air conditioners and heat pumps. The problem that existing refrigerant charging depends on a static target value and cannot adapt to system individual differences and working condition changes in a self-adaption mode is solved. According to the process, a digital twinborn simulation model of a to-be-charged air conditioning system is constructed, the system is started to operate under a preset simulation working condition, and a first operation parameter is collected to initialize and calibrate the model; dynamically filling the refrigerant according to a preset step length, continuously collecting a real-time second operation parameter, and feeding the real-time second operation parameter back to the model; on the basis of real-time data, the model performs online fitting on a changing curve of parameters such as the supercooling degree and the superheat degree along with the charging amount, and predicts the refrigerant amount when the energy efficiency ratio of the system reaches the optimal as the optimal charging target; and when the parameters collected in real time and the extreme value region predicted by the model converge, it is judged that filling is completed. According to the system and the method, 'tailoring 'type dynamic accurate charging aiming at each specific air conditioning system is realized, and the charging precision and the system operation energy efficiency are remarkably improved.

The present application relates to the technical field of water body bacteria inactivation, and particularly relates to a bacteria inactivation method based on micro-nano bubble ozone synergistic reaction, comprising the following steps: mixing and conveying ozone gas dissolved water and initial sewage to a front reactor to output as dissolved air sewage; conveying the dissolved air sewage to a reaction tank; obtaining the pressure of a plurality of pressure sampling positions of a conveying pipeline conveying the dissolved air sewage; determining the merging state of micro-nano bubbles in the conveying pipeline; determining an abnormal area in the merging state of the micro-nano bubbles; determining the bubble merging amount of the abnormal area based on the obtained conveying pipeline pressure of the position where the connecting port is located and the average pressure in the conveying pipeline behind the connecting port; determining the dosing amount of alkaline substances and the replenishment amount of the dissolved air water; and continuously conveying the dissolved air sewage from the front reactor to the reaction tank to complete the bacteria inactivation operation, so that the cavitation effect of ozone micro-nano bubbles is strengthened and the solubility of ozone in water is improved.

The application provides a user-side micro-grid load regulation method, system and equipment based on artificial intelligence, and relates to the technical field of micro-grid management.The method comprises the following steps: analyzing multi-dimensional heterogeneous data to obtain load time series data, and determining the demand weight of each user according to power demand data through an analytic hierarchy process; processing the load time series data through empirical mode decomposition to obtain intrinsic mode function components; dynamically predicting the intrinsic mode function components, and obtaining a multi-modal load prediction result by weighting and fusing the prediction results through an attention mechanism; optimizing the multi-modal load prediction result in combination with the operation target of a micro-grid cluster to generate a basic load regulation strategy of the micro-grid cluster; and generating a final regulation strategy corresponding to each user in combination with the demand weight corresponding to the user according to the basic load regulation strategy, and regulating the final regulation strategy. The application significantly improves the regulation accuracy of the user-side micro-grid load.

This invention discloses a method for hydrothermal cycling testing and performance degradation prediction of resin-based composite materials. The method first constructs a standard hydrothermal cycling test system for resin-based composite materials; secondly, it simultaneously acquires the glass transition temperature (GTH) and macroscopic mechanical property parameters of the material at different aging cycles using this system; then, it establishes a degradation function relationship between the GTH and hydrothermal environmental conditions (temperature, relative humidity, number of cycles); further, it constructs a quantitative mapping model between the GTH and key macroscopic mechanical properties (such as modulus and strength); finally, it integrates the above models to achieve quantitative prediction of the composite material's performance degradation process based on a known environmental spectrum. This invention connects the process from environmental excitation to microscopic evolution and then to macroscopic failure, providing accurate performance degradation prediction and offering a scientific basis for the engineering application of resin-based composite materials under different hydrothermal cycling conditions.

This invention belongs to the field of nanomaterial preparation technology, specifically disclosing a method for preparing ultrasmall selenium nanomaterials using physical vapor deposition (PVD) and its applications. This method involves placing selenium powder and sodium chloride in a tube furnace and performing gradient temperature-controlled vapor deposition under an inert gas environment to prepare ultrasmall selenium nanomaterials with a particle size of 2-5 nm. Compared to traditional solution methods, this process avoids the use of organic solvents, and post-processing only requires dissolution and centrifugation purification. It has advantages such as large-scale production capability, high product purity, and short preparation time (30 min), making it suitable for large-scale production. The ultrasmall selenium nanomaterials prepared by this invention have significant application potential in sodium-ion batteries, optoelectronic devices, immunotherapy, and selenium fertilizers (quantum dot selenium bio-fortifiers).

The present application relates to the drilling fluid with the anti-sloughing agent and preparation method, the total mass is 100% by mass percentage, is composed of the following components: lipophilic natural asphalt material 60-75%, hydrophilic compound material 10-15%, reinforcing agent 5-8%, oil phase dispersing agent 2-3%, lubricating film forming agent 1-2%, initiator 0.5-1.0%, regulator 0.5-1.0%; The lipophilic natural asphalt material is compounded by Karamay natural rock asphalt and Sichuan Qingchuan natural lake asphalt according to the mass ratio (6-8):(2-4); The hydrophilic compound material is compounded by 2-acrylamide-2-methylpropane sulfonic acid and hydroxyethyl cellulose according to the mass ratio (3-5):(1-2); The present application has the advantages of good oil-based compatibility, excellent plugging and anti-sloughing effect, simple process, low cost, stable performance, convenient use, pressure resistance, durability and stability.

This invention provides a titanium alloy with a three-phase microstructure and its preparation method. The method includes: treating the titanium alloy with pulsed current followed by heat treatment in a heat treatment furnace. This invention combines pulsed current treatment with conventional heat treatment, overcoming the barrier of high-density dislocations required for the formation of a three-phase microstructure. Only two steps are needed to successfully prepare a three-phase microstructure within the titanium alloy, achieving a short-process and rapid preparation of a three-phase microstructure. The net shape of the sample obtained after treatment by this invention remains unchanged, ensuring that the net shape of the workpiece is not damaged while obtaining a titanium alloy with a three-phase microstructure. The three-phase titanium alloy obtained by this invention exhibits excellent strength and plasticity, with a tensile strength of 1100-1130 MPa and an elongation of 18.5%-23%.

This invention discloses an efficient magnetic domain refinement method for ultra-low loss oriented silicon steel, relating to the field of steel material technology. The method includes: raw material preparation; hot rolling and final rolling; multi-stage thermomechanical processing; controlled suppression phase formation; secondary re-junction and magnetic field-induced selective growth; surface microstructure fabrication; low-temperature domain refinement annealing and alternating magnetic field coupling; segmented cooling and quality inspection. This invention, through controlled nanoscale suppression phase engineering, forms a high-density and uniform nanoscale suppression phase within the matrix, serving as pinning sites for grain boundaries and subgrain boundaries. This controls grain boundary migration dynamics during high-temperature secondary re-junction, overcoming the problems of abnormal grain growth and microstructure instability caused by uneven distribution and large size dispersion of traditional suppression phases. This avoids the root cause of large magnetic domains, improves the controllability and repeatability of the secondary re-junction process, obtains a more uniform orientation grain size distribution, and reduces localized magnetic domain enlargement and iron loss fluctuations caused by uneven grain size.

The application discloses a donkey skin oligopeptide, and an application thereof. The amino acid sequence of the donkey skin oligopeptide is selected from Glu-Thr-Trp-Arg or Ala-Tyr-Phe-Pro-Lys. The donkey skin oligopeptide disclosed by the application has alpha-glucosidase and alpha-amylase inhibitory activity, can assist in reducing blood sugar, has very important significance for developing medicines with blood sugar reducing function, and can be used for preparing alpha-glucosidase, alpha-amylase inhibitors and anti-type 2 diabetes drugs.

This invention relates to the field of electronic clock technology, specifically disclosing a method and system for calibrating the timing accuracy of electronic clocks based on data fitting. The method includes: based on the timing characteristics of the electronic clock, performing temperature difference mapping on the extreme value offset of the jitter amplitude distribution set to solve for the sensorless temperature estimate; combining the nominal period of the real-time pulse segment sequence of the electronic clock, matching and calibrating the temperature estimate to establish a temperature-offset mapping table; performing temperature difference mapping again on the current pulse segment to obtain the real-time temperature estimate, and obtaining the interval reference offset based on the interval positioning of the mapping table; configuring a compensation step size for the jitter amplitude according to the reference offset, generating a dynamic compensation step size, and adjusting the phase of the accumulated count value to obtain the single-cycle refresh value; using this as a correction reference, performing timing calibration on subsequent pulses of the electronic clock, and outputting the final working signal of the electronic clock; this invention can improve the timing accuracy and temperature tracking response capability of electronic clocks under conditions without an external temperature sensor.

The application discloses a coal bed gas well full life cycle monitoring system based on a distributed optical fiber sensing technology, which comprises a laser generator, a modulator, a circulator and an optical cable which are sequentially connected, and a demodulator which is further connected to the circulator; the optical cable is arranged on the outer wall of a production casing of a coal bed gas horizontal well; the optical cable is arranged on the outer wall of the production casing of a non-perforated well section of a horizontal section in a spiral angle of 30 degrees; and the optical cable is arranged on the outer wall of the production casing of a perforated well section of a casing horizontal section in parallel. The application has the advantage of "one cable for multiple purposes", that is, one set of permanent optical fiber system replaces multiple traditional monitoring technologies. Comprehensive monitoring can be realized, and each link from drilling to gas production and even subsequent coal mining influence is covered. Through one set of system and method, multiple parameter information related to coal bed gas exploitation and coal mining can be obtained, and the problem of incoherent data and integration difficulty among different monitoring methods is avoided.

The embodiment of the present application discloses an exposure device and a combined mask thereof, wherein the combined mask comprises a first metal layer, a plurality of first light transmission holes are formed in the first metal layer; a second metal layer is arranged opposite to the first metal layer, a plurality of second light transmission holes are formed in the second metal layer, and the second light transmission holes are arranged corresponding to the first light transmission holes along an optical axis. The present application filters the oblique light in the light beam through the multiple metal layers, ensures that all the light rays in the light beam propagate along the optical axis direction, increases the parallelism of all the light rays in the light beam, makes the dispersion of the laser beam lower, and further enables the laser beam to perform accurate etching under a large gap. The technical problem that the parallelism of the light path of the current proximity exposure machine is not high in the prior art, the formed laser beam is relatively dispersed, and a lower gap needs to be used is solved.

This invention discloses a 635MPa grade niobium-vanadium-chromium composite reinforced high-performance steel bar and its smelting method. By controlling the chemical composition and V / N mass ratio of the steel bar within the range of 3.35 to 3.75, and employing a multi-element composite strengthening formula of niobium, vanadium, and chromium to replace the traditional single vanadium-nitrogen alloy addition mode, production costs are reduced. During the smelting process, a dedicated dry powder stirring device is used to pre-mix the microalloying reinforcing agent, achieving uniform mixing of powder components and removal of magnetic impurities. Simultaneously, a composite desulfurizing agent is introduced and a step-by-step addition process is adopted, combined with a gradient ladle bottom-blowing argon stirring system, to effectively reduce the sulfur content in the steel. The steel bar prepared by this invention has a uniform microstructure, high grain size, and excellent mechanical properties such as tensile strength, yield strength, strength-to-yield ratio, and elongation. It exhibits good product consistency, low production costs, and can stably mass-produce high-performance 635MPa grade high-strength earthquake-resistant steel bars.

This invention provides a method and system for assembling battery cell connection components, belonging to the field of electrical component manufacturing technology. The method includes the following steps: obtaining an initial feature dataset for each contact point in the battery cell connection component to be crimped; generating differentiated crimping parameters for each contact point based on the initial feature dataset and a mapping model; performing crimping on each contact point according to the differentiated crimping parameters, and collecting the dynamic contact resistance of the contact point in real time; calculating the relative deviation between the dynamic contact resistance and the target contact resistance; calculating and correcting the crimping force and crimping stroke in real time based on the relative deviation to obtain the crimped battery cell connection component; verifying the contact characteristics of the contact points in the crimped battery cell connection component, and outputting a qualified crimped battery cell connection component. This method can optimize the assembly process of battery cell connection components and improve the interfacial bonding stability and long-term reliability of the contact points of the battery cell connection component.

The application discloses a kind of method for testing chip warping using industrial microscope and chip warping test tooling, wherein method is set on an object table a chip warping test tooling, chip warping test tooling is provided with four support columns;When testing, FCBGA product is supported by four support columns, so that product is in the state of suspension, then select four corner points on the substrate of product, first, the position of any three corner points in four corner points is leveled by telescopic adjusting support column, so as to adjust the suspension position of product;After leveling, the geometric center of product is set to zero position, then the Z axis value Z1 of the position of any one of any three corner points in four corner points and the Z axis value Z2 of the position of the remaining one of four corner points are measured by industrial microscope, finally, the above-mentioned value Z1 and value Z2 are judged with warping value standard, so as to determine whether the warping value of product is qualified.

The present application relates to the technical field of carton product quality detection, and particularly relates to a method and system for determining the end of a crush test of paper-based folding material. The method synchronously collects total pressure, displacement, and four-corner contact or height signals of the carton, updates the maximum force in real time, and calculates the drop ratio, fixed pressure difference, slope, and post-peak holding time. The four-corner consistency threshold is used as a precondition for the end criterion, and the end trigger is shielded when the four corners are not level. The drop ratio threshold, holding time, and slope threshold are adaptively adjusted according to the initial corner difference obtained in the small load stage, and the maximum force is output in the displacement bottom output report. The method can reduce early stopping and peak underestimation caused by local crushing of misaligned corner cartons, and improve test accuracy, repeatability, and safety.