470results about How to "Repeatable" patented technology

The invention discloses a method of producing the hyperfiltration membrane of amphiphilic copolymer modified polyvinylidene fluoride, comprising the following steps: 1) mixing polyvinylidene fluoride, poly (methyl methacrylate - monomethyl ether polyoxyethylene methyl methacrylate), additives, non-solvent and solvent to form the casting film solution; 2) making the casting film solution into the polyvinylidene fluoride membrane by using the film forming machine and then soaking in the coagulation bath; 3) conducting the posttreatment of hydrophilicity; 4)obtaining the hydrophilic polyvinylidene fluoride ultrafiltration membrane after cleaning and drying. The method is characterized in that the brush shape, chain ball shape or dumbbell shape amphiphilic copolymer are mixed with the polyvinylidene fluoride to produce the polyvinylidene fluoride hyperfiltration membrane with hydrophilicity, anti-pollution, large flux and high retention rate by adopting the solution phase conversion method. The method has the advantages that the obtained membrane is provided with dozens to hundreds nanometer of particular densified hydrogel surface layers, the contact angle of the membrane surface can be reduced below 60 degrees and can be lowered to 0 degree within tens of seconds, the water flux can reach 1000L / m<2> / h (0.1Mpa) or above, the retention rate of BSA can reach 90% or more and the recovery rate of water cleaning flux can reach 90% or higher.

The invention discloses a CRISPR-Cas9 system used for assembling DNA and a DNA assembly method. The CRISPR-Cas9 system includes the following parts: a plasmid used for expressing Cas9 gene, a first guide RNA, and / or a plasmid used for expressing the first guide RNA, wherein the first guide RNA has a CRISPR site. The CRISPR site is combined with a first reporter gene carried by a semisynthetic chromosome used for assembling according to base complementation pairing rule. The CRISPR-Cas9 system has advantages of high replacement success rate of homologous recombination, less species of guide RNA which needs to design and use, less harmful effect subjected by the genomic sequence, and low off-target rate.

The invention relates to a method and a device for intensifying controlled laser shot peening, first of all, a fatigue analysis model is established in a fatigue analysis software, distribution of residual stress in the accessories is optimized in light of the expectant fatigue life value after the intensification to obtain the distribution of residual stress which meets the demand; the distribution of residual stress is imported into a structural mechanics CAE analysis software to obtain by optimization laser shock wave pressure acting on the surface of a sheet metal and the shot peening track; after than a computer control system automatically selects the pulse parameter and a light beam changing device while the laser shot peening; the laser emits a high energy short pulse laser beam to be converted into the high amplitude shock wave pressure acting on the surface of the accessories after being subjected to an optical changing device and an optical mask; a measurement feedback system is used to online check the distribution situation of the stress and strain on the surface layer of the accessories in the laser shot peening, the special computer software module is utilized to perform error analysis and parameter correction, ensuring to generate the expectant distribution of residual stress on the surface layer of the accessories to meet the intensification demand of the anti-fatigue performance.

A preparation method of a drug sustained-release stent includes a preparation stent, a drug sustained-release stent constituted by drug coating on the stent, and the drug coating of the stent is composed of the following steps sequentially: (1) the preparation of a sustained-release drug coating layer; (2) the coating of the sustained-release drug coating layer; (3) drying. The dosages of the drug components on the sustained-release drug stent of the invention are in line with the designed dosages, and the drug can be released according to the stipulated dosages in the stipulated time of the design requirements completely in vitro tests. The invention has good biocompatibility, low cost of spraying process, high yield, controllable thickness of the coating layer, and slow and stable drug release rate.

The invention discloses an electronic mutual inductor test system and a test method. The electronic mutual inductor test system comprises a standard device, a signal conversion device, an error measuring device, a test power supply, a merging unit and a tested electronic mutual inductor, wherein the standard device is used for providing a standard signal serving as a test reference; the signal conversion device is used for receiving the standard signal and converting the standard signal into an analog signal which can be acquired by the error measuring device; the test power supply is used for outputting a primary voltage and a primary current for test use; the merging unit is used for receiving a digital signal output by the tested electronic mutual inductor and processing the digital signal; and the error measuring device is used for receiving the standard signal output by the signal conversion device and the digital signal output by the merging unit, and acquiring the ratio difference and the phase difference of the tested electronic mutual inductor. The electronic mutual inductor test system is particularly suitable for a field error test of the electronic mutual inductor, andhas the advantages of convenient test work, high reliability, small equipment volume, light weight, high test result accuracy and the like.

The invention discloses a production method of an artificial experimental sample imitating a natural crack rock sample and belongs to the technical field of rock and soil mechanics experiments. According to the production method, the natural crack rock sample is subjected to 3D scanning to obtain geometric data of a crack surface, and the geometric data is processed and computer three-dimensional modeling is carried out on the basis to obtain a computer three-dimensional model of a crack surface mold. Meanwhile, the computer three-dimensional model of a pouring box matched with the size of three-dimensional modeling software is established in the three-dimensional modeling software. A 3D printing technology is used for rapidly producing real objects of the crack surface mold and the pouring box in a large batch; and finally, the artificial experimental sample used for an indoor experimental research is obtained. The production method of the artificial experimental sample imitating the natural crack rock sample, disclosed by the invention, has the characteristics of high molding quality, short production period, low production cost and no pollution and no damages on the natural crack rock sample, and can be widely applied to the production of the artificial experimental sample of indoor experiments for researching the characters of crack rock bodies.

A cut deal laser inherent stress composite peen forming features in the clipper using robot, using carbon dioxide to realize the basic formation, profile measuring feedback system controlling the deformation quantity, left stress meter measuring the surface stress of the board, optical scanning the pre formation, realizing board through model analog software, getting optimized process parameter instructing laser consecutive peen formation, using neodymium glass laser providing short pulse strong laser light, laser impact wave as the force source of precise forming, using the profile feedback device and on line measuring board surface stress left stress to control the deformation quantity to realize precision forming with complex shapes.

The invention relates to a jack-based experiment model for simulating the uneven settlement of a foundation. The experiment model comprises a model box with an upper opening and is characterized in that a base frame is arranged at the bottom of the cavity of the model box, the base frame is formed by partition plates, square cells are arranged among the partition plates, a prefabricated plate is arranged in each square cell, and jacks are arranged below each prefabricated plate and connected with a hydraulic system. An experiment method includes the steps of a, building the model box; b, arranging the base frame; c, arranging the jacks and the prefabricated plates; d, filling a foundation layer; e, building an upper engineering structure layer; f, simulating foundation settlement; g, collecting and analyzing data. The experiment model and method has the advantages that the jacks can drive the ascending and descending of the prefabricated plate in the corresponding square cell, and accordingly multipoint uneven settlement simulation of the foundation layer can be achieved; the multipoint uneven settlement of the foundation can be analyzed by collecting and analyzing the data output by sensors, and the experiment model and method is good in simulation effect, low in cost and high in experiment repeatability.

The invention relates to a determination method of the CO2 displacement minimum miscible pressure of a low and ultra-low permeability reservoir. The method includes the steps of 1, selecting a physical model core; 2, conducting anti-corrosion treatment on the physical model core; 3, applying confining pressure to the physical model core and conducting vacuumizing; 4, measuring the pore volume of the physical model core and calculating the porosity of the physical model core; 5, heating the physical model core to a target formation temperature and measuring the permeability to water; 6, simulating the oil saturation process, recording the volume of saturated simulated oil and calculating the initial oil saturation; 7, simulating CO2 displacement, recording the displacement pressure and the outlet end liquid and gas volumes and calculating the CO2 displacement recovery rate; 8, replacing the physical model core with another physical model core with the same permeability and repeating the steps 1-7 to obtain CO2 displacement recovery rates under different displacement pressures and return pressures; 9, drawing a relation curve of the CO2 displacement recovery rates and the return pressures, wherein the return pressure corresponding to the recovery rate inflection point on the relation curve is the CO2 displacement minimum miscible pressure of the low and ultra-low permeability reservoir.

The invention provides a fever to-be-checked computer aided diagnosis method based on PET / CT images. Full-automatic analysis of the PET / CT bone images is achieved, and a doctor is assisted in diagnosing fever to-be-checked patients. Firstly, lossless interpolation of the PET images is conducted; secondly, hospital beds in the CT images are automatically removed; thirdly, full-automatic bone segmentation of the CT images is conducted; fourthly, bone segmentation is conducted on the whole-body CT images through an optimal active contour model of a CV active contour region; fifthly, after-treatment of the CT segmented images is conducted; sixthly, bone tissue information of the PET images is acquired; seventhly, bone tissue SUVs and bone tissue BSI values are acquired through calculation, wherein the SUVs of bones, marrow and bone cortices are acquired through calculation respectively, and the BSI values of the bones, the marrow and the bone cortices of the patients are acquired through calculation via the SUVs; eighthly, diagnosis is conducted based on the BSI values, wherein the SUVs and the BSI values are compared with SUVs and BSI values in an existing confirmed patient database, and a diagnosis report is made.

The invention relates to an ultrasonic non-destructive testing method for circumferential and axial residual stresses of inner and outer roller paths of a roller bearing. Ultrasonic longitudinal waves form critical refraction longitudinal waves in the inner and outer roller paths of the roller bearing through primary waveform conversion; time spent on that the critical refraction longitudinal waves propagate in the inner and outer roller paths of the roller bearing is measured; the mean circumferential and axial residual stresses of the inner and outer roller paths of the corresponding roller bearing can be calculated according to an acoustic elasticity theory. Furthermore, the distribution of the circumferential and axial residual stresses of the inner and outer roller paths of the roller bearing under different depths further can be measured by changing the frequency of the ultrasonic longitudinal waves. With the adoption of the ultrasonic non-destructive testing method provided by the invention, the problem of rapidly, conveniently and accurately detecting the distribution of the residual stresses of the inner roller and outer roller of the roller bearing can be effectively solved. The ultrasonic non-destructive testing method is widely applied to bearing production, repairing and maintenance sites, is a novel method of detecting the distribution of the residual stresses of a curve component within a narrow space, and has a very wide application range.

The invention discloses a method for preparing perfluoro sulfonic resin with abandoned ion exchange membrane in alkali-chloride industry, comprising following steps: swelling said abandoned ion with lower alcohol, emulsifying it with emulsion machine to resin particle, adding alcohol / water solvent and resin particle into autoclave, dissolving resin particle under high temperature and pressure and protection of nitrogen; getting solid mixture of perfluoro sulfonic resin and solution, separating with solid-liquid separation method and getting perfluoro sulfonic resin solution and solid perfluoro sulfonic resin. The resin solution is characterized by transparent, low content of foreign matter, high purity, similar property to that of Nafion EW 1100 solution, usage in field of mending ionic membrane pinhole and other mechanical damage, preparation of fuel battery proton exchange membrane and stereoscopic electrode and chemical catalysis.

The invention relates to a forecasting method of burning and explosion characteristics of organic compounds based on a support vector machine; the method utilizes various structural parameters which reflect the structural characteristics of molecules to describe the burning and explosion characteristics of organic matters according to the principle that various burning and explosion characteristics are decided by the molecular structure; the introduction of the support vector machine of a powerful machine learning algorithm can carry out training and forecasting to the burning and explosion characteristics of the organic matter and the nonlinearity, nondeterminacy and complexity which exist in the molecular structure, thus establishing a forecasting module with stability and effectiveness; the established forecasting module is applied in the forecasting of the burning and explosion characteristics of other unknown compounds with the advantages of high forecasting precision, fastness and convenience.

The invention discloses a method of treating hexavalent chromium wastewater by immobilized microorganisms. The method aims at solving the problem that the human health is affected as the environment is severely polluted by the hexavalent chromium wastewater. The method comprises the following steps: a step I of preparing immobilized microorganism particles and a step II of treating wastewater, wherein in the step I, a microbial agent is dissolved into a sodium alginate solution, an additive is added to form a mixed solution, then the mixed solution is added into a calcium chloride solution to obtain embedded particles, and the embedded particles are stewed and immobilized, and washed by normal saline to obtain the immobilized microorganism particles. According to the method of treating hexavalent chromium wastewater by immobilized microorganisms disclosed by the invention, by selecting and matching the additive and a culture medium, the treatment effects and treatment efficiency of the hexavalent chromium wastewater can be greatly improved to meet the needs of industrially treating the hexavalent chromium wastewater. The method of treating hexavalent chromium wastewater by immobilized microorganisms has the advantages of low cost, small equipment investment, convenience in operation, and the like, has a wide market prospect and a high application value, and is worthy of being popularized and applied on a large scale.

The invention provides a mechanical transmission gear knocking noise testing and noise quality quantitative evaluating method. The invention provides a detailed mechanical transmission gear knocking vibration noise testing method which comprises the steps of arranging a microphone and a vibration acceleration transducer; and quantitatively generating transmission gear knocking noise frequency characteristics in an idling condition and a creeping condition of a vehicle from a vibration acceleration signal and a noise signal which are measured in testing according to a spectrum analysis method, a time frequency analysis method and a coherent analysis method. According to the method of the invention, a unique objective evaluating method for the transmission gear knocking noise, namely a psychological parameter based on a language sharpness index is defined; a quantitative linear relation between a subjective annoyance performance value and a language sharpness index is generated; the determined quantitative relation between the subjective evaluation result and the objective evaluation result can be used for a plurality of subsequent tests repeatedly; and test period, manpower cost and physical resource cost can be greatly reduced.

The invention discloses an adjustable multifunctional circulation test groove platform, belongs to the technical field of ground in civil engineering, and particularly relates to an adjustable multifunctional circulation test groove platform which imitates a debris flow motor process erosion effect along a way. The adjustable multifunctional circulation test groove platform is detachable, capable of being combined, convenient to operate and strong in repeatability, and comprises an erosion band support, a transition support, a sliding-down rail support, a sliding-down rail test groove and an erosion band test groove. The upper end of the sliding-down rail groove is installed on the sliding-down rail support, the lower end of the sliding-down rail groove is installed on the transition support, the upper end of the erosion band test groove is installed on the transition support, the lower end of the erosion band test groove is installed on the erosion band support, an erosion material sliding-down control partition plate is arranged in the sliding-down rail test groove, an initial material sliding-down area is arranged at the back of the erosion material sliding-down control partition plate, a corroded material placing groove is formed in the erosion band test groove, and the erosion band support, the transition support and the sliding-down rail support are respectively installed on a base support plate.

The invention discloses a preparation method of a water retention type proton exchange membrane for a fuel cell, including spraying a perfluorinated sulfonic acid resin solution on the surface of an expanded polytetrafluoroethylene micropore film; the method comprises the following steps: filling a perfluorinated sulfonic acid resin component and a silicon dioxide component into micropores of theexpanded polytetrafluoroethylene micropore film in an impregnating way; and controlling the exchanging thickness of a compound proton in a way of spraying the perfluorinated sulfonic acid resin component and the silicon dioxide component. The compound proton exchange membrane prepared by the method not only ensures the absorption capability of water but also reduces the total resistance of the compound proton exchange membrane because water retention components of silicon dioxide is distributed in a gradient way, has a water retention function, reduces the dependency of the proton exchange membrane fuel cell on a humidification system, can ensure the compound proton exchange membrane to normally work under a low-humidification environment, is easy to realize the large-scale production andhas uniform thickness, high humidity strength and good size stability.

A driverless automobile virtual test platform comprises a driverless simulation system, a virtual driverless test automobile, a data management module, a simulation control module and an interface calling module. The driverless simulation system is used for simulating the driving process of the driverless vehicle in the virtual environment according to the test requirement of the user on the virtual driverless test vehicle. The data management module is used for managing an automobile model and a scene model in the virtual test platform and comprises a test scene database, an automobile modeldatabase and a simulation control database. The simulation control module is used for binding corresponding motion parameters to the automobile model and establishing an unmanned virtual automobile dynamic model. The interface calling module comprises a system interface, a vehicle model switching interface, a scene switching interface and a parameter display interface. On the premise that the performance of the pilotless automobile is not affected, field testing is partially replaced, method and theoretical guidance are provided for field testing, the development period is shortened, and fundsare saved.

The invention discloses a pit slot three-dimensional index extracting and calculating method based on 3D line laser equipment. The pit slot three-dimensional index extracting and calculating method comprises the following steps: firstly, making a plurality of regular simulation pit slots with different depths and different areas, calibrating parameters affecting a recognition rate of the 3D line laser equipment to obtain an optimal parameter combination; secondly, recognizing and calculating depth, area and volume indexes of a pit slot under the optimal parameter combination; finally, performing a reliability test on the reliability of detecting equipment and a detecting method. The pit slot three-dimensional index extracting and calculating method disclosed by the invention basically can meet a requirement of an actual pit slot test under existing equipment, and provides a reliable method for extracting and calculating three-dimensional indexes of the pit slot.

The invention discloses a tongue coating greasyness identification method based on texture and distribution characteristics. The method comprises steps that, (1), a training sample set is established by utilizing acquired tongue surface image samples in combination with Gabor textures, Tamura roughness and tongue coating distribution characteristics; (2), the training sample set is trained by utilizing a support vector machine to establish a tongue coating greasyness classifier; and (3), the established tongue coating greasyness classifier is utilized for identification to determine whether a to-be-identified tongue surface image belongs to a greasy tongue phenomenon type. Through the method, tongue surface image textures, roughness and tongue coating distribution characteristic vectors are acquired, the support vector machine is employed as the classifier to simulate tongue coating image identification of Chinese medical specialists, and repeatability is realized; in an identification stage through the method, artificial guidance and parameter setting are not necessary, the greasy tongue phenomenon determination mechanism is more visual and fairer; Chinese medical identification on the greasy tongue phenomenon is simulated, and problems of strong subjectivity and poor repeatability existing in traditional Chinese medicine visual observation about the greasy tongue phenomenon are solved.

The invention relates to a torsion residual stress ultrasonic nondestructive test method. Ultrasonic longitudinal waves form critical refraction longitudinal waves on a torsion surface of a shaft through waveform conversion once, time when the critical refraction longitudinal waves are spread in the shaft is tested, and corresponding torsion residual stress can be calculated through an acoustic elasticity theory. Through changing the frequency of the ultrasonic longitudinal waves, torsion residual stress at different depths on the same torsion surface can also be tested. The method provided by the invention can effectively solve the problem of distribution of the torsion residual stress on the torsion surface at different angles, helps to find a principle stress direction, can also perform fatigue strength analysis, is quite suitable for wide application in a production field and a maintenance repair field, is a novel method for detecting residual stress distribution through ultrasonic waves, and has quite bright application prospect.

The invention discloses a dynamic pore-pressure static sounding probe for detecting sludge. A coaxial cable (1) is used for transferring a signal and data; an analogue-digital converter (2), an acceleration transducer (3) and a gradiograph (4) are arranged on an upper half section of the probe; a side-wall friction cylinder (5) is arranged on a lower half section of the probe; a side wall frictional resistance sensor (6), a pore water pressure sensor (7), a disc resistance sensor (8) and a temperature sensor (9) are arranged in the side-wall friction cylinder (5); a disc (10) is connected under the side-wall friction cylinder (5); a filtering net (11) is arranged at the center of the disc (10); the filtering net (11) is also located at the center of the side-wall friction cylinder (5); and a water inlet channel is formed between the filtering net (11) and the pore water pressure sensor (7). The application of the probe has the characteristics of in-situ, directness, quickness, accuracy, economical property, and the like, and a powerful testing tool is supplied to geotechnical engineering practice.

The invention provides a multiscale global sampling method for filling an image void, which mainly comprises the following steps: segmenting an input image into a geometrical layer and a texture layer, and recovering the geometrical layer of the image void area by tensor voting; carrying out multiscale grid segmentation on the image void area to form a multiscale image structure of the void area, defining a posterior probability model for the void filling problem on the multiscale image structure, and calculating the globally optimal solution of the posterior probability model by a Markov chain Monte Carlo method based on simulated annealing; and synthesizing missing image information of the image void area according to the void area integral sampling set corresponding to the globally optimal solution. The invention can search out a globally optimal image block to be attached to the void area, so as to fill or recover the void generated in the virtual scene object extraction and scene edition process, thereby solving the problem of unfavorable filling effect for a complex image or large void area condition due to the irreversible void filling process.

The invention discloses an InN nanopillar epitaxial wafer growing on a Si substrate. The InN nanopillar epitaxial wafer comprises, from bottom to top, an Si substrate, an In metal nanometer microballon layer and an InN nanopillar layer. The diameters of In metal nanometer microballons in the In metal nanometer microballon layer are 20-70 nm. The diameters of InN nanopillars in the InN nanopillar layer are 40-80 nm. The invention further discloses a preparation method of the InN nanopillar epitaxial wafer growing on the Si substrate. The diameters of the nanopillars are uniform and meanwhile the technical problem of a large number of dislocations between InN and Si due to severe lattice mismatches between the InN and the Si is solved. Thus, the defect density of the InN nanopillar epitaxial wafer is greatly reduced, the radiative recombination efficiency of current carriers is effectively increased and the luminous efficiency of nitride devices like a semiconductor laser unit and a light emitting diode can be improved significantly.

A moulding technology of a compound proton exchange membrane of a fuel cell, comprising a technology that coats a perfluorinated sulfonic acid resin on a bulked polyfluortetraethylene micropore basement membrane, characterized in that the technology that coats a perfluorinated sulfonic acid resin on a bulked polyfluortetraethylene micropore basement membrane comprises dipping the polyfluortetraethylene micropore basement membrane in a diluted solution of the perfluorinated sulfonic acid, coating the perfluorinated sulfonic acid resin solution on both sides of the basement membrane and heat moulding a compound membrane. The technology of the invention solves the technical problem that in same compound membrane preparation technology, the polyfluortetraethylene membrane is hard to control and membrane forming thickness accuracy and productivity effect are low and so on. The deformation of the polyfluortetraethylene membrane in the process of spray coating of the compound membrane does not exist and the invention has advantages that the invention is easy to expand production, is low in request of spray coating technology and device and the evenness of the thickness of the compound membrane that is spray moulded is high.

The invention discloses an automobile semi-physical simulation experimental system combining a controller area network (CAN) bus and an electronic control unit, and belongs to the technical field of automobile design and development. The automobile semi-physical simulation system mainly comprises two parts: an entity part and a virtual simulation part, wherein the entity part is connected with the CAN bus through all systems including wheels, a frame, a power system and sensors of all control systems on an automobile chassis; the CAN bus is connected with the virtual simulation part through the electronic control unit; the virtual simulation part comprises a road view and a mathematical model; physical hardware is embedded into the simulation system; a software and hardware technique and an electronic technique are combined together; a computer is used for establishing a virtual model for reflecting an objective law; the virtual model is used for performing experiments; and certain acquired key signals are sent out by real hardware. The automobile semi-physical simulation system saves the cost compared with pure hardware, and has higher reliability compared with pure software.

The invention discloses a CuZn double-monatomic electrochemical catalysis CO2 reduction material and a preparation method thereof, and belongs to the field of composite material preparation. The electrochemical catalysis CO2 reduction material is composed of a reaction active matter and a carrier, CuZn double-monatoms are used as the reaction active matter, and nitrogen-doped carbon nanosheets areused as the carrier; the metals Cu and Zn exist in the form of single atoms and have the maximum atom utilization efficiency, so that the electrocatalytic material has relatively excellent catalyticactivity and selectivity, and the Faraday efficiency of a product ethanol is close to 50% within a relatively wide voltage test range (-0.8 to -1.3 V vs.RHE).

The invention provides a vehicle driving situation data recognition and modification method. The method comprises the following steps: acquiring vehicle road driving testing data by using a vehicle speed recorder, judging the validity of a speed signal according to the positioning state of the speed signal, the continuity of a time signal, a speed limiting value method and an acceleration limiting value method; calculating the lasting time of problem data of invalid positioning, speed loss, speed over-limiting and acceleration over-limiting; judging whether the singularity data can be modified or not according to the lasting time; if the singularity data can be modified, modifying the singularity data, and if the singularity data cannot be modified, rejecting the whole group of testing data. By adopting the method, the influence that the validity of the whole testing data is reduced because of a small number of singularity data is eliminated, original data are reconstructed, the validity of the testing data is improved, the uncertainty in the process that the singularity data in the vehicle speed signal are recognized according to subjective judgment and experience and knowledge of people is solved, the accuracy and the efficiency in recognition are improved, and the vehicle speed signal recognition and modification can be repeated.

The invention relates to a laser-cladding etching preparation method for a 3D-printing formed part. The laser-cladding etching preparation method comprises the steps that 1 powder is fed; 2, layered slicing treatment is performed; 3, layered laser cladding is performed; 4, layered multi-scale porous structure laser etching treatment is performed; 5, after all the above steps are completed, a worktable controls a laser device of a 3D printer, an inert gas shielding device and a powder feeder to be in a closed state, and abrasion resistance and / or lubricity detection are conducted on the finally formed part. The laser-cladding etching preparation method adopts the laser cladding for additive material manufacturing, is assisted by high-precision laser etching to manufacture special multi-scale porous surface structure parts, has the advantages that the machining time can be shortened, the operation efficiency can be improved, the abrasion resistance and lubricity of the formed parts can be wholly improved, the problem of poor lateral forming precision of the formed parts due to additive material manufacturing is solved, pore edge hardness is greatly improved, and the laser-cladding etching preparation method can be reliable in performance, stable in operation, free of noise and pollution in the actual application process and the like.