64results about How to "Excellent process parameters" patented technology

The invention discloses a cordyceps militaris culture medium polysaccharide, and a separation and purification method and application thereof. The polysaccharide comprises the following monosaccharides by molar percentage: 0.11% of ribose, 0.11% of rhamnoside, 0.45% of arabinose, 0.13% of xylose, 14.50% of mannose, 83.96% of glucose and 0.73% of galactose. Through the adoption of the extraction method provided by the invention, the biological activity of the cordyceps militaris culture medium polysaccharide P1 is not influenced, the obtained polysaccharide pure product P1 has high purity and stable property, has obvious effects in the aspects of anti-oxidation, uric acid reduction and bacteriostasis, and is beneficial to human metabolism. The cost is low, and the polysaccharide P1 pure product can be further used for the development of health products, medicines and cosmetics.

The present invention relates to a method for determining the optimal parameters of the thermal oil spraying and heating process of the oil storage tank, which includes: determining the decision variable according to the factors that affect the thermal oil spraying and heating effect of the oil storage tank in the actual production process; obtaining different The measured data of the thermal oil spraying heating process in the experimental storage tank under the parameters, the field synergy angle, uniformity, heating efficiency and average heating rate are used as indicators to evaluate the heating effect, the weights of each indicator are determined, and the objective function is calculated; through Decision variable and objective function establish a support vector machine model; based on the support vector machine model, an initial population of size M is generated, and a genetic algorithm is used to optimize the objective function; the optimized variables are used as experimental parameters for indoor simulation experiments to obtain the corresponding objective function , the error with the result of the support vector machine exceeds a certain range, then repeat the iteration until the error is less than a certain range. The invention can find the optimal process parameters, which ensures the calculation accuracy to a great extent.

The invention discloses a method for producing metallurgy-grade alumina by taking pulverized fuel ash and recycled ammonium salt as raw materials. The method comprises the following steps: (1) preparing materials; (2) roasting; (3) dissolving; (4) crystallizing; (5) carrying out a liquid-solid ammonolysis reaction; (6) grinding and removing sulfur; and (7) performing low-temperature Bayer aluminum production. The method disclosed by the invention has the advantages that an aluminum salt ammonolysis method suitable for strong acid and weak base is adopted, namely liquid-solid or gas-solid ammonolysis is performed, the production efficiency is improved by over 60 percent compared with that a liquid-liquid ammonolysis method, the process conditions of the ammonolysis method are optimized, optimal process parameters are determined, the obtained product, namely crude aluminum hydroxide, is easy to filter and wash, the model selection of equipment is simple, and industrial mass production can be realized.

The invention discloses a method for preparing a SERS substrate of a silver nanometer / copper foam material. Firstly, immerse the cleaned and dried small pieces of foam copper with appropriate specifications in dilute hydrochloric acid solution for a period of time, and then successively wash them with absolute ethanol, deionized Rinse the foamed copper sheet with water, then immerse the processed foamed copper sheet in the mixed solution of silver nitrate solution and PVP solution prepared in advance to shake, rinse the foamed copper sheet with absolute ethanol and deionized water again, and put it in a vacuum It is fully dried in a drying oven, and the silver nano / copper foam substrate can be obtained after drying. The SERS substrate of the silver nanometer / copper foam material prepared by the invention has the advantages of cheap materials, simple preparation method, strong stability, storage resistance, and high sensitivity in Raman detection.

The invention belongs to the technical field related to laser welding, and discloses a process parameter optimization method and system for suppressing pores in laser stir welding. The method includes: S1, obtaining the backward chord length, forward chord length, forward step length and average The relationship between energy density and welding process parameters, the distance between the laser motion trajectory and the two adjacent intersection points of the weld center in the laser stir welding process is the chord length; S2, establish the backward chord length, forward chord length, forward step length and average The optimization constraints of energy density; S3, obtaining the preset range of process parameters; S4, substituting the process parameter values ​​within the preset range into the optimization constraints of backward chord length, forward chord length, forward step length and average energy density , then the process parameter combination that satisfies the optimization constraints of backward chord length, forward chord length, forward step length and average energy density at the same time is the optimized process parameter. This application optimizes the welding process parameters to achieve welding with large melting depth and few pores.