212results about How to "Avoid generating" patented technology

The invention discloses an automatic causal structure generation method based on semantic representation and logical reasoning of a large language model. The method comprises the following steps: acquiring an input text; performing semantic coding and clustering on the obtained input text by utilizing a large language model, and establishing a candidate causal variable set; causal relationship detection is carried out on the established candidate causal variable set based on anti-fact intervention and do-calculation; performing causal direction judgment, and generating a directed acyclic causal graph meeting logic consistency; and on the basis of the generated directed acyclic causal graph, natural language interpretation is generated by using a large language model, and logic consistency closed-loop verification is carried out. According to the method, automatic generation from the natural language to the causal structure is realized, the causal variable set is automatically extracted and constructed from the unstructured natural language text, the defects that variables need to be manually defined and modeling depends on field experts in the existing causal modeling process are avoided, and the labor cost and professional threshold of causal structure construction are remarkably reduced.

This application relates to a wastewater solenoid valve and a water treatment system, including a valve body and a scale inhibition module. The valve body defines a valve cavity, and the valve body has an inlet and an outlet. The inlet is connected to the valve cavity for inputting wastewater into the valve cavity, and the outlet is connected to the valve cavity for outputting wastewater from the valve cavity. The scale inhibition module is disposed within the valve cavity. Its inlet end is connected to the inlet to receive the wastewater input through the inlet, and its outlet end is connected to the outlet to output treated wastewater through the outlet. By placing the scale inhibition module within the valve cavity defined by the valve body, the module can react with scale ions in the input wastewater, thereby preventing scale formation. The treated wastewater is then discharged from the outlet. Thus, the scale inhibition module effectively limits scale formation within the valve body, preventing scale accumulation and valve blockage, thereby ensuring normal wastewater discharge.

This invention discloses a method for controlling sulfides in sulfur-containing gear steel, belonging to the field of metallurgical technology, including converter, LF refining, RH refining, and continuous casting processes. Converter process: molten steel tapping temperature 1630±20℃, carbon-oxygen product controlled below 0.0020; LF refining process: aluminum content in molten steel controlled at 0.035-0.045%, LF slag composition adjusted to R: 1.5-2.5, FeO+MnO: 1.0-2.0%; RH refining process: ferrotitanium added in one step to adjust the composition appropriately; Continuous casting process: argon-blown stopper rods and submerged entry nozzles are used for continuous casting, and 150-200 kg of low-basicity tundish covering agent is added to the tundish. The sulfur-containing gear steel produced by this invention can be continuously drawn for more than 10 heats, and the level of Class A inclusions can be stably controlled at A coarse ≤ 1.0 grade and A fine ≤ 1.5 grade, with a pass rate of over 99.9%.

The utility model is applicable to the technical field of material preparation, and provides a spray head device for high-temperature alloy atomization powdering, which comprises a spray head body, the nozzle is arranged at the top end of the spray head body, a spray hole is formed in the nozzle, the spray head body is fixedly communicated with a liquid inlet pipe, the two sides of the spray head body are both fixedly communicated with air inlet pipes, the two air inlet pipes are both communicated with the liquid inlet pipe, and a compression cavity is formed in the spray head body; the connecting pipe is arranged at the bottom end of the spray head body; the adjustable fixing mechanism is arranged on the connecting pipe and used for being matched with the spray pipes with different thicknesses; and the cooling mechanism is arranged on the spray head body and is used for cooling the spray head body. According to the spray head device for high-temperature alloy atomization powder preparation, the spray head can be effectively cooled, the atomization efficiency is improved, the powder quality is improved, and the spray head device can be matched with spray pipes with different thicknesses.

The invention discloses a method for ultrastably modifying a Y-type molecular sieve in a short process. Washing the NaY molecular sieve with water until the NaY molecular sieve is qualified, and preparing first slurry by using the working solution; adding a rare earth salt solution into the first slurry, adding inorganic acid to adjust the pH value, and carrying out ion exchange to obtain second slurry; washing and filtering the second slurry, performing flash evaporation drying, and roasting at 500 DEG C for 2.5 hours to prepare first powder; feeding the first powder and SiCl4 gas into a reactor, staying reaction materials for 10 minutes, feeding the reaction materials into a negative-pressure pulping tank, adding water, pulping, and controlling the pH value to be 2.5-3.5 to obtain third slurry; and washing and filtering the third slurry, adding water and pulping to obtain the ultra-stable molecular sieve slurry. According to the prepared ultra-stable molecular sieve, the content of rare earth oxide is 8%-15%, the cell constant is 24.25-24.60 angstroms, and the specific surface area is 600-650 m < 2 > / g; and flexible adjustment of the rare earth content is realized.

The application belongs to the technical field of inorganic chemical industry, and discloses a preparation method of high-purity hafnium tetrachloride, which comprises the following steps: vacuum degassing pretreatment of mixed hafnium dioxide and high-purity carbon source; continuously feeding the pretreated material into a horizontal rotary chlorination reactor, and reacting with chlorine at 950 DEG C to 1050 DEG C to generate a crude product mixture; filtering the crude product mixture through a high-temperature ceramic filter, removing iron and aluminum impurities through a chemical interception reaction column, and separating zirconium and hafnium through a multi-stage gradient sublimation rectification system, wherein the sublimation rectification system is integrated with a dynamic mass transfer separation control system, and the operation conditions are dynamically adjusted through a mass transfer-heat coupling model based on real-time collected process parameters; and finally collecting and packaging under a fully-closed condition. The obtained hafnium tetrachloride is a high-purity rare metal compound, and can realize deep removal of zirconium impurities and process self-adaptive optimization.

The application discloses a preparation method of iopromide and intermediates thereof, and particularly relates to the fields of organic synthesis and medicinal chemistry, and the preparation method route is as follows: a compound of formula I is subjected to chlorination reaction, acylation reaction, reduction reaction and iodination reaction to prepare a compound of formula V, and then iopromide is further prepared, the method can not only avoid the generation of diacylation by-products (formula 18), but also effectively reduce the generation of diiodo compounds (formula 24) in the preparation process, the intermediates are easy to separate and purify, and high-purity products can be obtained at a high yield.

This invention relates to transition layer materials and welding processes for welding dissimilar steel and aluminum materials, belonging to the field of welding technology. The transition layer material for welding dissimilar steel and aluminum materials of this invention comprises a copper layer, a copper alloy layer, and a zinc alloy layer arranged sequentially; the copper layer is adjacent to the steel base material, and the zinc alloy layer is adjacent to the aluminum base material; the copper content in the copper alloy layer is 62.0%-64.0%; the zinc content in the zinc alloy layer is 89.0%-91.0%; the mass ratio of the copper layer, copper alloy layer, and zinc alloy layer is (0.9-1.1):(2.3-2.7):(1.8-2.2). By sequentially setting the copper layer, copper alloy layer, and zinc alloy layer between the steel base material and the aluminum base material, a gradual transition from the steel base material to the aluminum base material is achieved, effectively avoiding the formation of brittle Fe-Al intermetallic compounds during direct welding, and enhancing the mechanical properties and durability of the welded joint.

The invention belongs to the technical field of metallurgy, and particularly relates to 590MPa-grade hot galvanizing dual-phase steel and a production method thereof, and the steel comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, 0.01%-0.03% of Si, 0.90%-1.8% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.005%-0.010% of Al, 0.05%-0.30% of Cr, 0.05%-0.30% of Mo, less than or equal to 0.0060% of O, 0.010%-0.020% of N, and the balance of Fe and inevitable impurities. The method has the advantages that low carbon-silicon-aluminum and high nitrogen are cooperatively regulated and controlled in component design, and in the hot rolling process, premature precipitation of AlN particles in the hot rolling process is effectively inhibited by controlling the low coiling temperature, so that a large amount of nitrogen is reserved in a hot rolled plate in a solid solution state.

The application relates to a scale-inhibiting alloy and a preparation method thereof and a scale-inhibiting sheet manufactured from the scale-inhibiting alloy. The scale-inhibiting alloy comprises the following components: 55wt%-70wt% of Cu, 15wt%-30wt% of Zn, 5wt%-15wt% of Ni, 0.5wt%-3wt% of Si, 1wt%-5wt% of P, 0.001wt%-0.05wt% of a modifying element, and the balance of inevitable impurities, wherein the modifying element is one or more of B, Ti and Zr. The scale-inhibiting alloy adds the Si element for strengthening, so as to improve the mechanical properties and corrosion resistance; the Zn element is added as a negative electrode and the P element is added as a positive electrode, the alloying forms alpha phase+beta phase+multi-element brittle compound phase, can well excite the active current, and prevents the generation of water scale. The scale-inhibiting alloy has low production cost, meets the comprehensive requirements of cost, processing performance, corrosion resistance, mechanical properties, health and market acceptance of water treatment products, and has a good application prospect.

This invention discloses a method for preparing pentaerythritol oleate based on sodium bisulfite. The method involves the esterification reaction of pentaerythritol and oleic acid with sodium bisulfite as an auxiliary agent. Sodium bisulfite, as an auxiliary agent, possesses both catalytic and antioxidant functions, effectively improving the reaction rate and product yield while suppressing oxidation side reactions. This eliminates the need for additional antioxidants, improving product quality and reducing costs. The preparation method is simple, mild, and environmentally friendly, with readily available raw materials, low-cost auxiliary agents, and easy separation. After the reaction, the catalyst is removed by hot filtration, and unreacted oleic acid is removed by solvent extraction, effectively reducing the product's acid value. The extracted potassium oleate byproduct has a purity of 80%–90% and can be used as a flotation agent, release agent, or raw material for lubricant production, making it suitable for industrial applications. The resulting pentaerythritol oil is suitable for high-end lubricants, bio-based plasticizers, and environmentally friendly coatings.

This invention relates to a descaling and sterilization method for an intelligent bladeless fan and the fan itself, relating to the field of smart home appliances. The method includes: acquiring preset water hardness, water tank temperature, water storage time, and real-time scale buildup on an ultraviolet lamp; recording the number of pumping operations during the storage time; matching an appropriate pumping speed based on the real-time scale buildup when the real-time scale buildup is not less than a preset high scale buildup; pumping water at the specified speed; pumping water at a preset initial speed and closing the return valve when the real-time scale buildup is not greater than a preset low scale buildup, recording the pumping time at the specified speed; establishing a scale prediction model by recording water hardness, pumping speed, pumping time, and water tank temperature in a preset scale model database; simulating the scale formation rate and time based on the scale prediction model, and cleaning the scale when the scale formation time is reached. This application improves the fan's disinfection effect.

The invention discloses a method for synthesizing mesalazine and application of mesalazine. The method comprises the following steps: introducing p-nitrophenol, formic acid and a Cu-Co-coated MFI-NS molecular sieve catalyst into a continuous flow reaction zone, and sequentially carrying out electrophilic substitution and nitro hydrogenation cascade reaction at normal pressure and 50-70 DEG C; the catalyst has a micropore-mesopore stepped pore channel, and contains a Cu0 metal cluster and a framework Co < 2 + > acid site. And separating, acidifying and crystallizing the reaction liquid to obtain a finished product. According to the invention, the shape-selective selectivity and difunctional synergistic effect of the molecular sieve are utilized, high conversion rate (gt, 98%) and high selectivity (gt, 94%) under mild conditions are realized, the product purity is greater than or equal to 99.5%, and the Cu / Co residue meets the ICHQ3D standard. The catalyst can be recycled for 10 times or more, the yield is reduced by 5% or less, iron mud pollution of a traditional iron powder method and the metal leaching risk of a noble metal catalyst are thoroughly eliminated, and the method has the remarkable advantages of being environmentally friendly, efficient, low in cost, easy to industrially amplify and the like and is suitable for preparing the medicine for treating the inflammatory bowel disease.

The application provides a ketoreductase mutant and application thereof in synthesis of a key chiral intermediate of tigogaral, and provides a ketoreductase mutant with an amino acid sequence as shown in SEQ ID NO: 4, 6, 8, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40 or 42. The ketoreductase mutant has higher carbonyl catalytic activity and chiral selectivity than a wild type, and is used for preparation of a key intermediate R-5,7-difluorobenzodihydropyran-4-ol of tigogaral.

The invention discloses a parallel flow channel heat exchanger flow distribution simulation method based on a general flow resistance model. The method comprises the following steps: 1, a single-channel general flow resistance model construction stage: creating a general flow resistance model; carrying out single-channel fine modeling and simulation; acquiring pressure drop-flow velocity data; fitting to determine a flow resistance coefficient; 2, a whole machine flow distribution simulation stage: constructing a whole machine simulation model: establishing a three-dimensional geometric model of a macroscopic flow channel system of a target heat exchanger, performing grid division to obtain a macroscopic flow channel CFD model, abstracting all parallel micro-channels of a core heat exchange section of the target heat exchanger into a parallel flow resistance network consisting of a large number of flow resistance elements, each flow resistance element is endowed with a universal flow resistance model which is determined in the first stage and has a specific flow resistance coefficient; coupling solution is carried out, an iteration process is established, the error between the driving pressure difference of each flow resistance element and the pressure drop calculated according to the general flow resistance model is smaller than a preset threshold value, and iteration convergence is carried out; and outputting a flow distribution result of all parallel flow channels of the whole target heat exchanger.

The application discloses an austenitic structure steel and a preparation process thereof, and belongs to the technical field of metal materials. The Nb and N element content in the austenitic steel should satisfy: Lg([N][Nb])<-1.5 and -1.5 The precipitate in the austenitic structure steel is mainly nitride, the size of the nitride is smaller than 200 nm, and there is no large-size primary MX phase precipitate. Through the steel composition and process control, the austenitic structure steel is more reasonable in the solid solution stage dispersion nitride precipitate size and distribution, the precipitation strengthening effect is improved, and the low-temperature strength of the austenitic structure steel is improved, meanwhile, the generation of the primary MX phase in the solidification stage is reduced, and the toughness and plasticity of the austenitic structure steel in the super-low temperature environment are ensured.

The application discloses a high-temperature high-power hybrid integrated device and a packaging method thereof, and belongs to the technical field of integrated circuits. The device comprises a circuit module (1) and a heat storage unit box body (2) provided with an inner cavity. A recess (21) is arranged on the surface of the heat storage unit box body (2), the circuit module (1) is fixedly connected in the recess (21), the circuit module (1) is in contact with the heat storage unit box body (2) to form heat conduction, a first filling body (3) composed of phase change heat storage materials is arranged in the heat storage unit box body (2), and a heat insulation layer (6) is arranged on the outer surface of the heat storage unit box body (2). The application effectively improves the heat dissipation capacity and high-temperature resistance of the circuit module, simultaneously reduces the temperature of internal components of the circuit, enables the circuit to normally work in the case that components and materials with a rated working temperature lower than an ambient temperature are adopted, and avoids the adoption of valuable high-temperature components and materials, so that the economic cost of the circuit module is reduced as a whole.

This invention provides a submerged arc welding wire suitable for high heat input welding of 50–150 kJ / cm and its application, belonging to the field of welding materials technology. The submerged arc welding wire provided by this invention comprises the following chemical composition: C: 0.07–0.12%, Si≤0.09%, Mn: 1.70–1.95%, P≤0.012%, S≤0.005%, Ni: 0.55–1.00%, Mo: 0.40–0.58%, Ti: 0.11–0.24%, Nb≤0.05%, V: 0.03–0.04%, Ca≤0.0015%, B: 0.0005–0.0045%, Ce≤0.030%, and the balance Fe. The submerged arc welding wire provided by this invention meets the requirements for the mechanical properties of the deposited metal at a heat input of 50–150 kJ / cm, and is applicable to the production of large welded structural components and high-efficiency welding manufacturing.

The application provides a low-sulfur and low-phosphorus high-manganese submerged arc welding wire steel and a preparation method thereof, and the chemical components of the steel are as follows in terms of percentage by weight: C 0.07%-0.11%, Si≤0.10%, Mn 1.30%-1.50%, P≤0.012%, S≤0.008%, Mo 0.50%-0.65%, Ni 0.15%-0.25%, Cu≤0.10%, Al≤0.008%, O≤0.0040%, N≤0.0050%, and the rest is iron and inevitable impurities. The application adopts a production mode of '120t converter+LF furnace refining+small billet continuous casting+heating furnace heating+controlled rolling and controlled cooling rolling+heat preservation channel', and solves the problem of difficult oxygen control in the process of the low-silicon variety of the low-sulfur and low-phosphorus high-manganese submerged arc welding wire steel. The application not only guarantees the mechanical property requirements of the low-sulfur and low-phosphorus high-manganese submerged arc welding wire steel rod, but also has good drawing performance and welding performance.

This invention relates to the field of flue gas pollution control technology in coal-fired power plants, and discloses a method for total pollutant emission reduction in an environmental protection island based on morphological transformation and residual compensation. The method includes: acquiring real-time operating data of a smart environmental protection island in a coal-fired power plant, generating a time-series feature vector, and setting inlet boundary conditions; constructing a pollutant morphological transformation mechanism model for each environmental protection subsystem, inputting relevant data and inlet boundary conditions, and calculating the theoretical baseline concentration of pollutants; using an LSTM as an error-compensated prediction model, after training with historical data, inputting the current operating condition time-series feature vector to obtain the concentration prediction residual value, obtaining the deviation between the historical training conditions and the current operating conditions, calculating the confidence factor, and generating a mixed pollutant prediction concentration; finally, using ammonia injection flow rate and other factors as optimization variables, setting constraints, and constructing an objective function with the lowest total cost to obtain the optimal control parameter set, thereby achieving optimized control and pollutant emission reduction of the environmental protection subsystem. This invention significantly improves the pollutant emission reduction effect.

The application relates to the technical field of land planning and design and evaluation, and discloses a land space low-efficiency land digital planning method based on an improved comprehensive evaluation, which comprises the following steps: extracting features of time sequence data of crowd flow based on land information of land use, and generating land space utilization rate evaluation indexes; adopting a time-space clustering mode for clustering, generating clustering density information and converting the clustering density information into a space low-efficiency land index; marking land low-efficiency land, and setting adjustable design parameters of the land low-efficiency land; and optimizing the adjustable design parameters of the land low-efficiency land by using an improved particle swarm algorithm, so as to obtain an optimal design scheme of the land low-efficiency land. The space low-efficiency land index is generated based on the evaluation indexes and clustering information, the land low-efficiency land is marked, and the adjustable design parameters are set; through construction of a fitness function and combination of the improved particle swarm algorithm, the optimal design scheme is generated, and efficient utilization and intelligent planning of the land low-efficiency land are realized.

The application discloses a mineralization treatment method of organic waste liquid, and belongs to the technical field of radioactive waste treatment. The organic waste liquid contains uranium, tributyl phosphate and diluent. The mineralization treatment method comprises the following steps: the organic waste liquid is separated through short-path molecular rectification to obtain a diluent fraction and a tributyl phosphate fraction; the tributyl phosphate fraction is reacted with alkali liquor to generate an alkaline hydrolysis product containing dibutyl phosphate salt, n-butanol, water and uranium; the n-butanol is collected through condensation reflux; and the remaining alkaline hydrolysis product is treated through two-stage oxygen-controlled incineration, so that phosphate glass and qualified flue gas are finally obtained. The mineralization treatment method has the advantages of no corrosion, short process, high-efficiency mineralization and stabilization of the waste liquid, direct disposal of the product, consideration of resource recovery and radioactive safety, and easy industrialization.

The invention provides a connected terrain generation method and device, electronic equipment and a storage medium, and relates to the technical field of computer graphics, and the method provides a basis for the subsequent generation of a connected terrain by defining the adjacency relationship and the connection relationship between blocks, thoroughly distinguishing the adjacency relationship and the connection relationship, and introducing the connection relationship. According to the method, an improved wave function collapse algorithm is introduced, limitation adjacent to a connected area is added when a collapse object is selected in the improved wave function collapse algorithm, and limitation capable of being communicated with at least one boundary image block in the connected area is added when a determined state of the collapse object is selected; according to the method, the adjacency relation and the connectivity relation can serve as constraint conditions at the same time in the generation process, generation of non-connected areas is fundamentally prevented, the connected areas are continuously expanded to cover the whole terrain grid along with generation steps, and then the connected terrain is obtained.

The application discloses a preparation method of low-chlorine high-purity bisphenol A type liquid epoxy resin. The method comprises the following steps: mixing raw materials containing epichlorohydrin, bisphenol A and a cosolvent, adding a catalyst A, and performing etherification reaction under low-temperature condition of not more than 50 DEG C; recovering unreacted epichlorohydrin in the system after the reaction is completed to obtain an etherification product; mixing the etherification product with a solvent, adding a catalyst B, and performing ring-closing reaction under low-temperature condition of not more than 50 DEG C; performing extraction separation on the obtained reaction product to obtain an organic phase; and performing desolventizing treatment on the organic phase to obtain the bisphenol A type liquid epoxy resin product. The total chlorine content of the obtained bisphenol A type liquid epoxy resin product is low, the viscosity is low, the purity is high, the quality is good, the preparation method is simple, the process flow is short, and the cost is low.

This invention discloses a method for controlling the oxygen partial pressure and performance of barium titanate ceramics during sintering using coconut shells, comprising the following steps: Step 1: Select coconut shells, clean them, remove the fibers, and dehydrate and dry them using a high-temperature forced-air drying oven; Step 2: Crush the dried coconut shells into small pieces, place them in a crucible, and carbonize them at high temperature in a muffle furnace; Step 3: Take out the high-temperature carbonized coconut shell char, grind it, and sieve it; Step 4: Weigh the coconut shell char and barium titanate powder at a mass ratio of 2~6:100, and then grind them to fully mix the coconut shell char and barium titanate powder; Step 5: Add a binder to the mixed powder, grind it thoroughly, and then press the powder into sheets to obtain a green body of fully mixed coconut shell char and barium titanate; Step 6: Place the pressed green body into a muffle furnace and sinter it at high temperature; Step 7: Obtain the coconut shell char mixed barium titanate ceramic.

The invention relates to the technical field of waste recycling, in particular to a harmless treatment and resource recycling method for bromine in bromine-containing waste, which comprises the following steps: putting the bromine-containing waste into a reaction solution, and heating for reaction to obtain debrominated waste and filtrate containing bromine ions; the reaction liquid comprises an alkaline substance, a copper compound precursor, a ligand and a solvent; the ligand is selected from at least one of a bidentate ligand containing two nitrogen sites, a polydentate ligand containing two nitrogen sites, a bidentate ligand containing two oxygen sites, a polydentate ligand containing two oxygen sites, a bidentate ligand containing one nitrogen and one oxygen site and a polydentate ligand containing one nitrogen and one oxygen site; the temperature of the heating reaction is not higher than 150 DEG C. The invention solves the problems of environmental pollution and bromine resource waste caused by organic bromine pollutants (such as highly toxic brominated dioxin) due to landfill, incineration and other traditional treatments after the brominated flame retardant (such as tetrabromobisphenol A, polybrominated diphenyl ether and the like)-containing plastic or resin is abandoned.

The invention discloses a method for synthesizing chiral morpholine from propargyl alcohol ester. Chiral morpholine is an important drug molecular skeleton and is widely applied to the aspects of analgesia, anesthesia, tumor resistance, heart treatment and the like as a drug active ingredient, but an efficient synthesis method is lacked. According to the method disclosed by the invention, under the regulation and control of arylboronic acid and a specific chiral ligand, propargyl alcohol ester and an affinity reagent react to obtain optically pure (87-97% ee) morpholine. The method has the characteristics that the catalyst and the ligand are wide in source, and the substrate is cheap and easy to obtain; the chiral morpholine has excellent enantioselectivity and good functional group compatibility, can be suitable for structural modification of bioactive molecules and intermediates, and is a simple and efficient asymmetric catalysis strategy for synthesizing chiral morpholine.

A steam generator for a fuel cell system comprises: a heat exchanger (34) with at least one internal heat exchange surface, a water inlet pipe (46), and a dripper (52) having a flow channel fluidly connected to the water inlet pipe (46). The dripper (52) extends inside the heat exchanger (52) and above the heat exchange surface for supplying water downward to the heat exchange surface for conversion into steam. The dripper (52) has outlet orifices (56) spaced apart along the flow channel, and between adjacent outlets (orifices 56), the dripper has a stepped profile at least on its underside to prevent droplet coalescence from adjacent orifices. The fuel inlet pipe may have a section coaxially mounted with a portion of the water inlet pipe (46). This section of the fuel inlet pipe may surround that portion of the water inlet pipe. In a fuel cell system with a steam generator, the steam generator may include a fuel inlet pipe and combined steam and fuel outlets, as well as a reformer directly or indirectly connected downstream of the steam generator.

This invention discloses an automatic planning method and system for spraying paths of 3D workpieces based on visual point clouds, specifically relating to the field of automatic spraying path planning technology. By constructing a spraying space coupling description set and a spraying deployment constraint index, the method achieves a quantitative characterization of the degree of restriction of spraying space in different surface areas. Combined with the safety margin of spraying distance and the adjustable range of spray gun posture, a physical accessibility assessment quantity for spraying is formed, which automatically divides the spraying area into a stable spraying area, a restricted spraying area, and a physically unsprayable area. Thus, in the path generation stage, differentiated strategies such as continuous spraying, segmented compensation, and path reconstruction are adopted for different areas, which significantly improves the coating coverage integrity, thickness consistency, and process reliability of complex 3D workpieces in the actual spraying process. It also enhances the system's adaptability to structural complexity and working condition changes in real coal mining machinery spraying sites and reduces the risk of manual repair and rework.

The application relates to the technical field of methane conversion catalytic materials, in particular to a preparation method of metal-nonmetal dual-site synergistic catalytic material and application of the metal-nonmetal dual-site synergistic catalytic material in methane conversion, and the preparation method of the metal-nonmetal dual-site synergistic catalytic material comprises the following steps: S1, zinc peroxide precursor solution preparation; S2, in-situ nitrogen element doping; S3, Au loading; and S4, metal-nonmetal dual-site synergistic catalytic material preparation. The application provides the preparation method of the metal-nonmetal dual-site synergistic catalytic material and the application of the metal-nonmetal dual-site synergistic catalytic material in methane conversion, so as to solve the problems of low methanol selectivity, insufficient methane conversion activity and easy overoxidation in the related art.