32results about How to "Solve hard-to-get puzzles" patented technology

The invention discloses a railway fastener system damage detection method based on a convolutional neural network. Based on a train-rail coupling dynamics calculation and analysis model, spring stiffness reduction is utilized to simulate fastener damage, and simulation calculation is carried out to obtain vibration acceleration responses of the steel rail under different irregularity excitations,different damage positions and different damage degrees so as to construct a big data set. A one-dimensional convolutional neural network is designed, the established network is trained by using the data set, and cross validation and parameter adjustment are carried out. The trained network is subjected to performance test on a test set, and the test result shows that the detection method has highdetection precision and robustness. Furthermore, a dynamic experiment of a key section of the target monitoring line is carried out, an actually measured big data set of system damage is constructed,and the big data set is used for carrying out transfer learning on a pre-trained one-dimensional convolutional neural network model.

The invention relates to a forming die and method for magnesium alloy thin webbed supporting fork forgings, in particular to an isothermal die forging forming die and method for a rare earth magnesium alloy thin webbed supporting fork. The problems that rare earth magnesium alloy thin webbed supporting fork forgings are prepared through conventional forging, blank manufacturing and forming are hard, forming defects are prone to occurring, the structure performance of the magnesium alloy forgings is hard to control, and the performance is low are solved. The forming method comprises the main steps that 1, blank manufacturing is carried out; 2, forging forming is carried out; 3, cooling is carried out; 4, primary acid pickling is carried out; 5, damage repairing is carried out; 6, final forging is carried out; 7, secondary acid pickling is carried out, wherein a magnesium alloy forging obtained in the sixth step is subjected to acid pickling, graphite on the surface is cleaned away, and a formed forging with the treated surface is obtained; and 8, the formed forging with the treated surface obtained in the seventh step is put into an aging oven to be subjected to aging treatment, and the finished rare earth magnesium alloy thin webbed supporting fork is manufactured. The forming die and method are used for preparing of the magnesium alloy thin webbed supporting fork.

The invention relates to a device for detecting defects of an inner wall of a cylinder. The device comprises a lens, a light source, an exploring tube and a camera assembly, the lens is internally provided with a channel for light to pass through, one end of the exploring tube is connected with one end of the lens, a light deflection assembly is arranged at the other end of the exploring tube, anopening is formed at the position, aligned with the light deflection assembly, of one side of the exploring tube, light outside the exploring tube can enter the exploring tube from the opening and pass through the light deflection assembly to be transmitted in the axis direction of the channel, the optical fiber is arranged in the probe tube, one end is connected with the light source, the other end is exposed from an opening edge of the probe tube, so the light emitted by the light source can irradiate along the optical fiber, the camera assembly is connected with the other end of the lens and located on the opposite side of the probe, and the shooting direction of the camera assembly is aligned with the channel axis direction. The device is advantaged in that a problem that images of aninner wall of a small-diameter and long-depth cylindrical workpiece are difficult to obtain is solved, the device is suitable for detecting the inner walls of transparent and non-transparent cylinders, and the automation level of a production line is improved.

The invention discloses a method for producing hydrogen peroxide with the naphtha cracking off-gas, which includes the following steps: 1.Light oil and liquid ammonia gasified are fed into a blender according to the weight ratio of 1:3-3.3, then the mixture is fed into a cracking furnace containing refinery coke catalyzer for scission reaction; 2. The deamination of the cracking outcome is carried out and then the the cracking outcome is absorbed by cold water and divided into liquid phase and gas phase, wherein, the liquid phase is resolved into finished product of hydrocyanic acid, the gas phase will be treated in the next step; 3. The gas phase generated in the step 2 is treated by alkaline washing and purified by membrane separation to collect the hydrogen gas; 4. The hydrogen gas collected in the step 3 is fed into a hydrogen peroxide production device as the hydrogen source, then the hydrogen peroxide can be obtained after the hydrogenation, oxygenation, extraction, purification and concentration. The invention can avoid waste of resources, reduce air pollution and can reduce the manufacturing cost of the product at the same time.

The invention discloses a method for screening anti-black rot mutant plants with cabbage free microspores. The method comprises the following steps: (1) separating and purifying black rot pathogenic bacteria; (2) roughly extracting toxin of black rot pathogenic bacteria; (3) dissociating and purifying microspores; (4) inducing a disease-resistant mutation embryoid; (5) differentiating adventitious buds of a disease-resistant mutant by the embryoid; and (6) performing rooting culture on adventitious buds. According to the invention, the disease-resistant mutant raw material is firstly taken from a haploid cell or a double haploid cell, extensive variation types can be generated, and the abundant hereditary basis can be supplied for disease-resistant selection; a mutant always happens at cell level and is applied to a microspore mutant for easily selecting a recessive gene and polygene homozygous dominance mutant; the mutant can be doubled through ploidy, so as to quickly acquire a homozygous disease-resistant material; the black rot pathogenic bacteria rough toxin is taken as a selective agent and is greatly beneficial to the promotion of gene aberration rate and the expansion of variation spectrum.

The invention relates to a chemical synthetic method of 8-furan-8-oxomethyl caprylate. The method comprises the following steps of adding octanedioic acid and sulfoxide chloride into a reaction bulb, agitating an obtained mixture at a room temperature until a reaction is complete, and distilling to remove the sulfoxide chloride under normal pressure; afterwards, adding a solvent and a catalyst into the reaction bulb to carry out another reaction, dropwise adding methanol into the reaction bulb for quenching, decompressing the reaction bulb and distilling to remove the solvent, dissolving a target product by using an extracting solution to obtain a solution, and distilling the solution under reduced pressure to obtain a yellowish oily 8-furan-8-oxomethyl caprylate pure product. According to the chemical synthetic method of the 8-furan-8-oxomethyl caprylate, a synthetic strategy of a one-pot method is adopted; by proceeding from the low-cost octanedioic acid, the octanedioyl chloride is prepared with a high yield; afterwards, the octanedioyl chloride and furan are subjected to a regioselectivity Friedel-Crafts acylation reaction; finally, acyl chloride at the other end is quenched by using the methanol to directly generate methyl ester to obtain the product; by using the method, the synthetic route of the target product is simplified; the reaction time is greatly shortened; the synthetic total yield is improved; therefore, the production cost is decreased; the chemical synthetic method has the advantages of being low in cost, higher in yield, simple to operate and suitable for industrial production, and the like.

The invention provides a method and device for obtaining a strain theoretical value based on a finite element model. The method comprises the following steps: 1, determining a first finite element unit grid in the finite element model of a structural test part, and enabling the first finite element unit grid to be a grid pasted with a strain gauge; 2, in a structural test part finite element model, a 2 * 2 finite element grid corresponding to the first finite element unit grid is determined, and the 2 * 2 finite element grid comprises the first finite element unit grid; 3, obtaining respectivecentral point strain values and central point coordinates of the four finite element unit grids; and step 4, according to the respective central point strain values and central point coordinates of the four finite element unit grids, obtaining theoretical values corresponding to the strain gauges by adopting an interpolation algorithm. According to the method, the problem that theoretical calculation values of strain measurement points are not easy to obtain due to the fact that the strain measurement points of the test part are inconsistent with finite element grid calculation points is solved.

The invention belongs to the field of drilling leakage prediction and the field of artificial intelligence machine learning, and particularly relates to a drilling leakage pressure prediction method based on an SVR algorithm. The method comprises the steps of collecting data from a drilling well history database for preprocessing, creating a sample set and a test set, training an SVR model, introducing a relaxation factor, introducing a Lagrange function for unconstrained and dual derivation, selecting optimal parameters by using an SMO algorithm, and constructing a regression hyperplane to obtain a prediction function. And inputting the preprocessed data set into the trained SVR model to obtain a predicted value of the drilling leakage pressure. The method solves the problem that the current leakage pressure data has great significance for leakage stoppage and leakage prevention but cannot be directly obtained, has the advantages of reliable result, lower cost, convenience in operation and high generalizability, and has certain guiding significance and reference value in the field of leakage stoppage and leakage prevention.

The invention discloses a Peziza repanda Pers. strain separation method which is characterized by comprising the following steps: preparing a culture medium, respectively pouring the culture medium into culture bottles, capping, autoclaving, cooling, carrying out preculture in a culture chamber for 3 days, and carrying out material inoculation if no infectious microbe pollution occurs; flushing the material with tap water, sterilizing, absorbing water with sterile filter paper, cutting the required position, taking a 5mm block, inoculating the material to the obtained culture bottles, and culturing; putting the culture bottles in a culture chamber with the temperature of 25 DEG C or so, and culturing for 7-10 days to form the callus; and dicing the formed callus, inoculating to a fresh PDA (potato dextrose agar) culture medium, putting the PDA culture medium in a constant-temperature environment of 25 DEG C or so, and culturing, wherein the hyphae can grow out after 3-5 days, and can be full of the test tube after 15 days. The method solves the problem that the Peziza repanda Pers. strain is difficult to obtain, and obtains the high-purity Peziza repanda Pers. strain.

The invention discloses an X-ray grazing-incidence reflecting-mirror effective area calibration method. The method comprises the following steps of adjusting a diaphragm aperture and a distance between the diaphragm aperture and an X-ray tube, and starting a narrow-beam X-ray source; measuring an X-ray narrow beam intensity; aligning an X-ray grazing-incidence reflecting mirror and the narrow-beam X-ray source; using a two-dimensional translation platform to scan the X-ray grazing-incidence reflecting mirror; measuring a photon number C of a reflecting-mirror focal point; calculating an on-axis effective area of the X-ray grazing-incidence reflecting mirror; and rotating the X-ray grazing-incidence reflecting mirror, repeating the step4 to the step6 and then acquiring an off-axis effective area of the X-ray grazing-incidence reflecting mirror. In the invention, through the adjustable aperture diaphragm, a diameter of a X-ray beam is limited, a high-collimation X-ray calibration beam is realized, and a problem that a traditional high-collimation X-ray calibration beam is difficult to acquire is solved; and through arranging the two-dimensional translation platform, a technical effect that a narrow beam scans and calibrates an effective area of the grazing-incidence reflecting mirror is reached and a defect that calibration accuracy is not high in a traditional method is overcome.