142results about How to "Rich choice" patented technology

The invention provides a collocation recommendation method and system based on association rule mining, and relates to the technical field of association rule mining, and the method comprises the steps: obtaining user historical transaction data, generating a user commodity transaction score matrix, carrying out the standardization processing, and predicting the commodity score through calculating the cosine similarity between users, and obtaining an initial candidate set; carrying out normalization processing on commodity prices, calculating commodity comprehensive similarity in combination with a category hierarchical structure, carrying out clustering grouping, and screening frequent item sets meeting support degree and confidence threshold values; and finally, a commodity price change sequence is extracted to calculate a dynamic price matching degree, a multi-dimensional evaluation index is constructed, a non-dominated sorting genetic algorithm and a deep Q network are adopted for optimization, and scene-based dynamic evaluation and recommendation are realized. According to the invention, the accuracy and timeliness of commodity collocation recommendation are improved, and the interpretability of the recommendation result is enhanced.

The invention discloses an in-structure sound field bounded uncertainty analysis method based on a physical information neural network. The method comprises the following steps: establishing a physical information loss function and establishing a physical information driven neural network; obtaining an input uncertain parameter value range of the internal sound field, obtaining a plurality of parameter levels, and training a sound pressure prediction model under the parameter levels; acquiring sound pressure of a sample point and establishing a data set; establishing a data driving residual error based on the data set, establishing an overall loss function by using the data driving residual error and a physical information loss function, and training a parameter-containing physical information driving neural network to obtain a parameter-containing internal sound field sound pressure prediction model; and establishing an interval model, and obtaining an internal sound field sound pressure uncertainty distribution range by using a global search algorithm and the parameter-containing internal sound field sound pressure prediction model. The method can solve the problem of prediction of the sound field in the structure containing uncertain parameters, and can effectively improve the calculation efficiency on the premise of ensuring that the calculation precision meets the engineering requirements.

The invention belongs to the technical field of biomedicine, and particularly relates to a nano antibody aiming at influenza A virus H1N1 subtype NA protein and application. The nano antibody comprises an amino acid sequence as shown in SEQ ID NO: 1 or consists of the amino acid sequence as shown in SEQ ID NO: 1. The nano antibody has high affinity, and experimental results show that the antibody can effectively inhibit proliferation of PR8 H1N1 virus in vivo and resist infection of lethal dose virus on mice. Meanwhile, the nano antibody is the first nano antibody which aims at the N1 subtype NA protein and has prevention and treatment effects, the market blank is filled, and the nano antibody can be applied to the fields of laboratory research, biosensor development, clinical diagnosis, infection prevention and treatment and the like. The nano antibody provided by the invention has the advantages of small molecular weight, high stability, low production cost and the like, and has wider application potential and market competitive advantages compared with the traditional IgG antibody.

The invention provides a local loading collaborative additive manufacturing thin-wall reinforced structure forming method and device.The local loading collaborative additive manufacturing thin-wall reinforced structure forming device comprises a shaping die, a multi-axis movement mechanical arm, a heating system, a hydraulic transmission system and a forming monitoring induction system, and the shaping die is connected with the multi-axis movement mechanical arm; the heating system comprises an induction heating element and an electric furnace, the induction heating element is arranged in the shaping die, and the forming monitoring induction system is integrated between the mechanical arm and the die. A detachable sustainable heating mold design and a local loading mode are adopted, an economical and convenient manufacturing method is provided for forming of the complex thin-wall reinforced structure, the forming quality of the thin-wall reinforced structure is improved, and the manufacturing cost is reduced.

The invention discloses a method for preparing a perovskite single crystal by using a general solvent system, and relates to the field of photoelectric materials. The general solvent system is composed of gamma-butyrolactone and polyethylene glycol and can be used for preparing perovskite single crystals with various components. The method for preparing the perovskite single crystal by using the solvent system comprises the following steps: preparing a perovskite precursor solution; heating the perovskite precursor solution; and taking out the single crystal from the solution, cleaning and drying. The method is simple and convenient to operate, and can be used for preparing large-size single crystals and preparing small-size single crystals on a large scale.

The invention discloses an operation state control method applied to a centrifugal machine. A rotating shaft is driven to rotate according to a rotating speed median value so that mixed liquid can be evenly distributed into each set of rotating drums; after separation of n parts of mixed liquid is completed, a set of rotary drums with the best separation effect in centrifugal separation of each set of rotary drums is confirmed, and the optimal centrifugal force of mixed liquid separation is obtained through calculation; calculating the radius of the energy-saving rotary drum to obtain a corresponding energy-saving rotary drum sleeve, and configuring the optimal rotating speed of the rotating shaft according to the position of the rotary drum sleeve and the optimal centrifugal force; and the mixed liquid is guided to the fixed drum sleeve. And driving the rotating shaft to rotate according to the optimal rotating speed, and separating the mixed liquid. Mixed liquid can be separated at the same time through multiple centrifugal forces. Through one-time separation of a plurality of rotary drum sleeves, the most suitable separation rotary drum can be determined at the fastest speed, and the separation efficiency is improved. And only one set of drum sleeve is used for separation again, so that the efficiency is high, and meanwhile, energy is saved.

The invention relates to the technical field of building reconstruction scheme evaluation, in particular to a target-driven decision-making level evaluation method for optimizing building reconstruction, and provides an optimized building reconstruction decision-making method based on investor types. The objective-driven decision-making level evaluation method for optimizing building reconstruction comprises the steps of model framework establishment, prototype building group data summarization and prototype design, evaluation of each energy-saving reconstruction measure, evaluation of an influence strategy of combined reconstruction of each reconstruction measure on energy, environment and economy, and the like. The optimized building reconstruction decision-making method based on the investor type is realized through a target-driven decision-making layer evaluation method for optimizing building reconstruction. The method provided by the invention performs comprehensive energy, environment and economic evaluation on building reconstruction on a macroscopic scale. The importance of a model framework of a simple evaluation method is emphasized, and the method integrates data mining analysis and hierarchical clustering (AHC) into a multi-target decision process, so that a building stakeholder can select the most appropriate technical transformation scheme on the macroscale.

The invention discloses a mechanical arm execution end and method capable of automatically straightening an FPC, and belongs to the technical field of mechanical arms, the mechanical arm execution end comprises a power module and a suction nozzle module which are arranged on a base at the tail end of a mechanical arm, and further comprises a clamping jaw module arranged on the base; the power output end of the power module is connected with the suction nozzle module and the clamping jaw module, and the power module is used for driving the suction nozzle module to do lifting motion and driving a left clamping jaw and a right clamping jaw in the clamping jaw module to be opened and close; when the left clamping jaw and the right clamping jaw are close to each other and are in a holding state, the FPC is limited in a gap between the left clamping jaw and the right clamping jaw in the holding state, so that the FPC is straightened by the left clamping jaw and the right clamping jaw when the FPC descends along with the suction nozzle module during material discharging and ascends along with the suction nozzle module during material taking; therefore, the FPC does not deflect in the process of taking and placing the touch key, and the FPC can smoothly penetrate into the through hole without being damaged.

The ironing equipment is used for ironing textile materials and comprises a supporting frame 1 and a main body part, the main body part is arranged on the supporting frame and comprises a main machine shell, a steam unit, a high-speed airflow unit and a nursing frame unit, and a textile material containing area is arranged in the nursing frame unit; the steam unit, the high-speed airflow unit and the nursing frame unit are all connected to the main machine shell, the main body part moves relative to the textile material, the steam unit is used for generating steam and conveying the steam to the nursing frame unit, and the high-speed airflow unit is used for generating a cooling runner to cool the interior of the main machine shell. The high-speed airflow unit is further used for generating high-speed airflow and conveying the high-speed airflow to the nursing frame unit, the nursing frame unit is used for receiving steam and spraying the steam to the textile materials in the textile material containing area, and the nursing frame unit is further used for receiving the high-speed airflow and spraying the high-speed airflow to the textile materials in the textile material containing area. The device has the advantages of high efficiency, no damage to textile materials, simplicity and convenience in operation, no contact with the textile materials and the like.

The invention discloses a high-entropy alloy fiber material of a core-shell structure and a preparation method and application thereof, and belongs to the technical field of alloy material preparation.The method comprises the steps that a buffering agent is dissolved in deionized water to obtain a solution A, the solution A is heated, a complexing agent, additional salt, a reducing agent and soluble metal salt are sequentially added, stirring and dissolving are conducted, and a solution B is obtained; adjusting the pH value of the solution B, and standing at room temperature to obtain an electrolyte; performing ultrasonic cleaning, flushing and drying on the conductive fibers with acetone, ethanol and deionized water respectively; a saturated calomel electrode is used as a reference electrode, a conductive fiber is used as a working electrode, a carbon electrode bar is used as a counter electrode, the three electrodes are immersed in an electrolyte, a constant-potential electro-deposition method is used, electro-deposition is carried out on the surface of the conductive fiber, and the high-entropy alloy fiber is obtained. Uniform electro-deposition of the high-entropy alloy on the surface of the fiber is achieved, and the high-entropy alloy fiber material with excellent conductivity is obtained.

The invention discloses a fabricated UHPC (Ultra High Performance Concrete) bridge pier column construction process and a prefabricated mold for the fabricated UHPC bridge pier column construction process. The fabricated UHPC bridge pier column construction process comprises the following steps: prefabricating a UHPC pier column mold; s2, transporting the UHPC pier column mold to a construction site, and hoisting and fixing the UHPC pier column mold on a plurality of abutments on the construction site; s3, concrete is poured into the UHPC pier column mold, and a pier column is formed after solidification; and S4, a prefabricated UHPC pier cap mold is erected on each pier column, concrete is poured into each UHPC pier cap mold to form a bridge component, and every two adjacent bridge components are connected to form the whole bridge. The construction efficiency of bridge construction can be improved, and the construction cost is reduced.

This invention discloses a hexamer of N-(3-hydroxy-4-methoxybenzyl)-N-(3,4,5-trimethoxyphenyl)-9H-pyridine[3,4-b]indole-3-carboxamide with the following structural formula, and discloses its preparation and its application in drugs for inhibiting tumor metastasis. Experiments have demonstrated that the N-(3-hydroxy-4-methoxybenzyl)-N-(3,4,5-trimethoxyphenyl)-9H-pyridine[3,4-b]indole-3-carboxamide hexamer of this invention exhibits excellent anti-tumor lung metastasis activity. Therefore, this invention provides a safe and effective technical means for combating tumor metastasis.

The invention discloses a monolithic imaging AR optical system which is characterized in that the optical system is composed of a light-emitting screen (L1), a reflecting mirror (L2) arranged in the inclined front of the light-emitting screen (L1) and human eyes (L3). The reflecting mirror (L2) is a concave reflecting mirror with positive focal power, and the material of the reflecting mirror (L2) can be designed according to requirements. In the monolithic imaging AR optical system, the total distance of glasses-screen-human eyes is short, the structure is compact, and the requirements of short exit pupil distance and small optical path space required by sports glasses are met.

A self-service rotatable pull-out multi-layer multi-grid steamer device comprises a top cover assembly, a steamer body, a steamer assembly, a bottom plate assembly and a dining plate assembly; the top cover assembly comprises a handle, a top cover, an air pressure hole and a hanging basket type steaming barrel suspended at the middle of the lower end surface of the top cover; the steamer body comprises a plurality of steamer single-layer assemblies stacked in sequence, the steamer assembly comprises a steamer body, a drawer taker slot and a drawer taker arranged on the outer side of the steamer body; the bottom plate assembly comprises a groove-shaped bottom plate and a steam generating device which can be connected to the lower end of the steamer wall, and the dining plate assembly comprises a dining plate base plate, a plurality of placement slots, a corrugated placement block and dining chopsticks; with a rotatable pull-out multi-layer multi-grid steamer structure, diners can steam dishes by themselves, realize customized steamed food and ensure the freshness of the ingredients; the outside of the steamer wall is provided with thermal insulation material and a drainage pipe for easy drainage to avoid scalding of diners and leakage of soup.

The utility model discloses a double-combination electro-adsorption filter element based on an electro-regeneration ion exchange membrane, which relates to the technical field of water treater and comprises a filter bottle, a second water supply central pipe is arranged at the axis of the filter bottle, and a first water outlet is arranged on the front side of the second water supply central pipe; two or more filter elements adopt different water inlet pipes and share one water outlet pipe, the filter elements are positively electrified to adsorb electrolyte for filtration, the filter elements are reversely electrified to discharge the electrolyte for regeneration, when one filter element is used for filtration, the other filter element can be electrified to perform regeneration, and the filter elements are alternately used in sequence, so that the filter elements of the device are quickly switched, and the efficiency of the device is improved. According to the device, the filter elements are convenient to clean, the process of filtering operation cannot be delayed, the continuous and stable water treatment effect is achieved, and if rapid filtering is needed, multiple filter elements can be used for filtering at the same time, so that the selection of a user is more diversified, and the universality of the device is higher.

The invention discloses an anti-P53 protein antibody, a tumor diagnosis product and application thereof, and relates to the technical field of antibodies. The heavy chain complementarity determining region comprises a heavy chain complementarity determining region in a heavy chain variable region as shown in SEQ ID NO: 14 and a light chain complementarity determining region in a light chain variable region as shown in SEQ ID NO: 15. The antibody can be used for diagnosing diseases with P53 as a marker, more protein choices are provided for detection of P53 and diagnosis of diseases with P53 as a marker, and the types of monoclonal antibodies aiming at the P53 protein are enriched. In addition, the antibody provided by the invention can be used for preparing a tumor curative effect evaluation product, a prognosis evaluation product or a recurrence and metastasis monitoring product.

The invention discloses a high-precision right-angle detection device and a high-precision right-angle detection method, which are characterized in that laser is reflected by adopting two right-angle surfaces of an original to be detected, and the first-order Doppler effect of incident laser and emergent laser is calculated by measuring ion spectrums of metastable-state lithium ions by using the incident laser and the emergent laser; according to the method, the incident laser and the emergent laser are incident, then the included angle between the incident laser and the emergent laser is reversely deduced through the first-order Doppler effect, and finally the right angle of the to-be-measured original part is obtained through calculation, and the angle measurement precision can be improved to be within 0.01 arc second and reach or even exceed 10 <-8 > radian; according to the invention, the ion transition spectral line frequency is used as a reference, and is a natural and stable reference source, regular calibration is not needed, an atomic transition spectral line or a molecular transition spectral line can also be used as a reference, the available ions, atoms, molecules and corresponding spectral lines are numerous, the wavelength coverage range is wide, and diversified choices can be realized.

The utility model relates to a paper padding plate for roll paper, which belongs to the technical field of roll paper transportation and comprises a plurality of protection components, a roll paper main body is arranged among the plurality of protection components, and the plurality of protection components are arranged along the outer wall of the roll paper main body at equal intervals. The roll paper packing board has the advantages that a plurality of paper packing board bodies can be connected in series through one nylon rope, so that the plurality of paper packing board bodies can be used in a matched mode, a complete reinforcing system can be formed, anti-falling and reinforcing are integrated, the stability of the roll paper main body during placement can be improved, and the roll paper packing board is convenient to use. According to the roll paper padding board, the nylon rope is arranged on the paper padding board body, the paper padding board body can be prevented from being lost through the operation that several paper padding board bodies are connected in series, meanwhile, if damaged, only the corresponding paper padding board body needs to be replaced, when roll paper bodies with different diameters are subjected to padding, only the length of the nylon rope needs to be changed, and the roll paper padding board is simple in structure, convenient to operate and high in practicability.

The application discloses a kind of high-efficiency super-soft organic solar cell of top incidence structure, it includes flexible substrate, anode, anode modification layer, active layer, cathode modification layer, cathode and antireflection layer from bottom to top, wherein the cathode is based on the transparent electrode of ultrathin silver.Especially by preferred cathode modification layer and introducing not more than 2nm thick gold as seed layer, make ultrathin silver surface more smooth and uniform, the transparent electrode can further improve the photoelectric energy conversion efficiency (PCE) of organic solar cell.Meanwhile, using the wide adaptability of top incidence structure to different substrates, the organic solar cell can also achieve comparable PCE (17.32%) with mm level rigid glass substrate on the polyimide flexible substrate with thickness of only 1.3 μm.Therefore, the highest efficiency of super-soft organic solar cell so far is obtained, and the highest power density (39.72W g ‑1 ) in all photovoltaic technologies at present is also obtained.

The utility model provides a cleaning appliance accessory seat with a cleaning function and a cleaning system, which comprise a cleaning module which can be arranged on a horizontal plane and a working module which can be arranged on a horizontal plane, is arranged in parallel with the cleaning module and is connected with the cleaning module, wherein the cleaning module comprises a first base part with a first base part cavity and a first accommodating part which is vertically connected with the first base part and is provided with a first accommodating cavity; the working module comprises a second base part with a second base part cavity and a second accommodating part which is vertically connected with the second base part and is provided with a second accommodating cavity, one end of the first base part cavity is communicated with the second base part cavity, the other end of the first base part cavity is communicated with the first accommodating cavity, and the second base part cavity is communicated with the second accommodating cavity. The multifunctional mop has the advantages that cleaning appliances and accessories can be stored, the accessories can be cleaned, and diversified choices are achieved.

The embodiment of the invention relates to a conductive interface modified sodium battery alloy foil negative electrode material as well as a preparation method and application thereof. The conductive interface modified sodium battery alloy foil negative electrode material comprises a sodium ion battery alloy foil negative electrode and a conductive modification layer which is completely attached to the bottom surface of the sodium ion battery alloy foil negative electrode, wherein the sodium ion battery alloy foil negative electrode is a whole foil material, a conductive agent and a binder are not contained in the sodium ion battery alloy foil negative electrode, and a current collector is attached or not attached to the surface of the sodium ion battery alloy foil negative electrode; the conductive modification layer comprises a carbon-based conductive modification layer prepared by a coating process or a metal-based conductive modification layer prepared by a coating process; the mass ratio of the conductive material in the conductive interface modified sodium battery alloy foil negative electrode material is lower than 50%.

The lithium battery comprises two end covers which are distributed up and down, a shell is arranged between the two end covers, the two ends of the shell are inserted into the two end covers respectively, a first clamping groove matched with the shell is formed in the side, facing the shell, of each end cover, and a second clamping groove matched with the shell is formed in the side, facing the shell, of each end cover. Clamping blocks are fixedly connected to the bottoms of the two sides of an inner cavity of the shell, sliding grooves are formed in the tops of the clamping blocks, clamping pins are installed in inner cavities of the sliding grooves in a sliding mode, and springs are fixedly connected to the bottoms of the clamping pins. The shell and the cover plate of the lithium battery are assembled together in a buckling manner, the end cover can be quickly separated from the shell to finish the disassembly structure when the battery is disassembled, the disassembly speed and efficiency of the lithium battery are improved, and the disassembled parts can be secondarily assembled and used, so that the cost input is reduced, and convenience is provided for the use of a user.

The invention discloses a virtual character control method and device, a storage medium and electronic equipment. The method comprises the steps of displaying a first virtual scene, entering a second virtual scene from the first virtual scene in response to a target virtual character, starting a target task, displaying a first virtual object in the second virtual scene, and displaying a target virtual object in the second virtual scene in response to the fact that the first virtual object is corrupted, and in response to the situation that the attack suffered by the target virtual object within the preset duration does not meet the preset condition, canceling display of the target virtual object, displaying a second virtual object in the second virtual scene, and in response to the situation that the virtual object to be attacked indicated by the target task does not exist in the second virtual scene, completing the target task. According to the method and the device, the technical problem that the control efficiency of the virtual role is relatively low due to the fact that more selection possibilities are not provided for the user after the specific virtual object set for the specific virtual scene is damaged in the related technology is solved.

The invention belongs to the technical field of molecular diagnosis, and particularly relates to a cfDNA fragment feature marker combination for diagnosing whether a subject has an abnormal state or not or predicting whether the subject has the risk of occurrence of the abnormal state or not and application of the cfDNA fragment feature marker combination. On the basis of the cfDNA fragment abundance spectrum obtained by capillary electrophoresis, a group of cfDNA fragment characteristic markers for diagnosing whether the subject has the abnormal state or predicting whether the subject has the risk of occurrence of the abnormal state are obtained through screening, and selection of the markers for diagnosing or predicting the abnormal state is enriched. The cfDNA fragment feature marker combination can be used for diagnosing or predicting the abnormal state of the digestive system or the lung, has important clinical significance and value, is expected to become a key early screening and auxiliary diagnosis tool in clinical practice, and helps doctors to diagnose or predict the abnormal state earlier and more accurately and improve life quality.

The invention discloses a network setting method and device, equipment and a medium, and belongs to the technical field of network configuration, and the method comprises the steps: obtaining current network configuration information through a command for displaying all network information; storing the obtained current network configuration information in a memory; refreshing the firmware version of the controller to a second firmware version; starting a second firmware version of the controller, and obtaining a flag bit for setting a network information command; judging whether the flag bit of the network information setting command is a first preset value or not; and in response to the fact that the flag bit of the network information setting command is a first preset value, acquiring current network configuration information in the memory, and performing network setting on the controller again according to the current network configuration information and the command for setting single network information. According to the method, a transition version does not need to be customized, the IPMI command is used for carrying out network configuration reservation setting on the controller, the development difficulty is reduced, and the product development time is shortened.

The utility model provides a kind of pull tab connecting piece and thermal superimposed wall, including the pull tab joint and single-head pull tab of being connectable, the pull tab joint is rectangular sheet, the pull tab joint is set with through-hole in one end away from the single-head pull tab, the pull tab joint is set with strip slot in another end close to the single-head pull tab, the end of single-head pull tab close to the pull tab joint is formed with protrusion, the protrusion can be connected with the strip slot clearance hook, the end of single-head pull tab away from the pull tab joint is set with mounting hole.The utility model can realize the production of low thermal conductivity and low cost material, avoid the risk of forming thermal bridge, improve the thermal performance of thermal superimposed wall.

The utility model belongs to the technical field of translators for document writing, and particularly relates to a translator for document writing, which comprises a shell, the shell is a hollow box body, a handle is mounted on the vertical surface of the right side of the shell, and a partition plate is arranged in an inner cavity of the shell to divide the inner cavity into an upper layer and a lower layer. An earphone bin is slidably mounted in a left inner cavity of the shell, a storage bin is arranged on the upper layer of the rear vertical face of the shell, a display device is slidably mounted in an inner cavity of the storage bin, a keyboard box is arranged on the lower layer of the front vertical face of the shell, a keyboard is slidably mounted in an inner cavity of the keyboard box, and a bookshelf is arranged in the middle of the upper surface of the shell. A pen box is arranged on the left side of the upper surface of the shell, a handwriting pen is arranged in an inner cavity of the pen box, a magnetic suction top cover is rotatably installed on the top face of the pen box, a loudspeaker is arranged on the right side of the upper surface of the shell, a hydraulic supporting rod is installed on the bottom face of a bookshelf, and anti-skid silica gel is arranged on the upper surface of the bookshelf. The use is convenient.

The present application provides a personalized advertising push method and related devices based on product data. Obtain product data of the product to be promoted, collect basic information and sales data of the product to be promoted, and provide basic data for the subsequent recommendation algorithm. By identifying similar products, more choices can be provided to users to avoid single recommendations. At the same time, collecting similar product data can help the algorithm analyze user needs more accurately. The weight of each similar product is calculated by analyzing similar product data, which reflects the relevance of each similar product to the user's interests. Sort by weight coefficient, and select similar products corresponding to the first k weight coefficients as recommended products. This ensures the relevance and effectiveness of the recommended products. By displaying advertising information, users can easily obtain the latest recommendation information, improve the reach of advertising and user experience.

The invention provides a method for preparing ganoderma lucidum wine by controlling the scale of ganoderma lucidum balls through liquid fermentation, and belongs to the field of food beverages. The method comprises the steps of pretreatment of a lucid ganoderma liquid fermentation culture medium, control of liquid fermentation conditions and preparation of the lucid ganoderma wine. By controlling the fermentation conditions in the ganoderma lucidum strain liquid fermentation process, especially the granularity of the solid raw materials in the ganoderma lucidum liquid fermentation culture medium and regulation and control of the dispersing time and the stirring speed of the pellets during inoculation, the scale of the ganoderma lucidum pellets can be controlled, so that diversified ganoderma lucidum wine product choices are provided for consumers, and the production cost is reduced. The adaptive requirements of different consumers on functional foods are met, the development of the ganoderma lucidum fermented wine in the field of healthy foods is promoted, and a new direction is provided for functional research of the ganoderma lucidum fermented wine.

The invention discloses a filtering method of nano SiC powder, and belongs to the technical field of electrostatic chucks, the filtering method comprises the following steps: preparing a precursor; preparing slurry: adding 100 parts of nano silicon carbide powder, a proper amount of dispersing agent, a proper amount of solvent and a proper amount of ball into a planetary mill, running at the speed of 400rpm / min for at least 1 hour, standing for 15 minutes, adding the precursor with the proportion of 3%-9%, and stirring at the speed of 400rpm / min for at least 30 minutes; filtering: filtering is carried out through a filtering device, the filtering device comprises a pressure tank, stable slurry obtained through treatment of nano silicon carbide is loaded into the pressure tank, the slurry is extruded into a membrane filtering system through nitrogen extrusion, and subsequent starting is facilitated through collection of discharged materials and nitrogen storage; and the membrane filtration system adopts a multi-layer stainless steel filter screen or a RoKi PP organic membrane or a hollow fiber ceramic membrane as a filter medium of the nano silicon carbide slurry.