456results about How to "Reduced mechanical properties" patented technology

The invention relates to a metal cutting machining path planning system, and aims to optimize the efficiency and precision of a metal machining process through advanced technical means. The system comprises a plurality of functional modules: an image acquisition module captures a multi-angle high-resolution image of a to-be-processed metal workpiece; the three-dimensional reconstruction module reconstructs a three-dimensional model by using the images; the cutting simulation module simulates the three-dimensional model in a virtual environment and records stress and heat distribution conditions in the cutting process in real time; the intelligent segmentation module divides the machining process into a plurality of stages according to the stress and heat data; the comprehensive optimization module is combined with a genetic algorithm and a simulated annealing algorithm to optimize the cutting path, depth and feeding speed of each machining stage; the feedback adjusting module monitors stress and heat changes in actual machining, and when the stress and heat changes exceed threshold values, cutting parameters are automatically adjusted or machining is paused. According to the system, through comprehensive application of image processing, analog simulation and optimization algorithms, the cutting efficiency and the product quality are remarkably improved.

The invention relates to the technical field of mechanical parameter adjustment, in particular to a method and system for adjusting operation parameters of agricultural machinery and a storage medium. The method comprises the following steps: acquiring multispectral image data of a farmland through a multispectral camera; performing image segmentation and feature extraction on the multispectral image data, and identifying different soil types, crop growth states and weed distribution to obtain farmland feature map data; performing tillage difficulty prediction of different areas on the farmland feature map data by using a deep learning algorithm to obtain tillage difficulty prediction data; acquiring part image data of the agricultural machinery; and carrying out edge detection and morphological analysis on the image data of the part, and identifying the wear state of the part so as to obtain wear state data. According to the method, deep learning is utilized to carry out tillage difficulty prediction and part wear dynamic modeling, so that the analysis capability of a complex farmland environment and a mechanical state is improved, and the prediction accuracy is enhanced.

The invention discloses a four-flapping-wing aircraft and an attitude control system thereof, and relates to the technical field of micro aircrafts, and the four-flapping-wing aircraft comprises a fixed rack, a guide rod, a slide block mechanism, a pitching frame, a rolling frame, a pulley and a chord driving system. The fixed rack is provided with four cantilevers, a sliding block mechanism is installed on a guide rod, and the pitching frame and the rolling frame control pitching and rolling actions through steering engines respectively. The four pulleys are connected to the pitching frame, and each pulley is hinged to one wing. The string driving system comprises a guide wheel, a string and a crank, one end of the string is connected with the slider mechanism, and the other end bypasses the guide wheel and is connected with the pulley to realize wing flapping. Through the deflectable spars and fine steering engine control, efficient aerodynamic performance, enhanced thrust output and excellent flight flexibility and adaptability are achieved, meanwhile, due to the design of the crank sliding blocks, structural stress is relieved, the service life is prolonged, the aircraft adapts to multiple flight modes, and the environment adaptability and task execution efficiency of the aircraft are improved.

The invention discloses a degradable armed acetal epoxy monomer and a preparation method thereof, the acetal epoxy monomer has the following molecular structure general formula: # imgabs0 #, in the formula, R1, R2, R3 and R4 are independently selected from one of hydrogen, methoxyl and ethyoxyl. The degradable acetal epoxy monomer is prepared through the aldol condensation reaction, the thermosetting epoxy resin prepared from the epoxy monomer and the curing agent can be rapidly degraded under the normal-pressure, mild and specific conditions, and huge economic and environmental advantages are achieved for recycling and reusing of the thermosetting resin. When the prepared degradable epoxy resin is used in thermosetting epoxy resin, under the degradation condition provided by the invention, a thermosetting epoxy resin matrix is degraded into alcohol and aldehyde with relatively small molecular weight, the mixture can be dissolved in an organic solvent, and a degradation product can be extracted through simple separation, so that the purpose of recovering the resin is achieved.

The invention provides a mining surrounding rock mobile sensor and a separation amount measuring method. The surrounding rock moving sensor comprises a steel wire rope, and the light sensing measuring part comprises a light source, a light measuring module and a measuring strip. The light source is provided with a light output end capable of outputting light; the light measuring module and the light output end of the light source are located on the same straight line and used for receiving and decoding light signals. One end of the measuring strip is fixed with the steel wire rope, the measuring strip is arranged between the light source and the light ray measuring module, and scale codes are engraved on the measuring strip according to improved Gray codes; wherein when the steel wire rope is pulled, the measuring strip is driven to move, when the measuring strip moves, a light source can be emitted out through different Gray code carving holes in the measuring strip and is received by the light measuring module, and the light measuring module decodes received Gray code information and converts displacement of the measuring strip. According to the invention, the measurement accuracy of the separation amount can be effectively improved.

The invention discloses fish mucus-methacrylated gelatin hydrogel with lubrication and resistance reduction performance and a preparation method of the fish mucus-methacrylated gelatin hydrogel. The preparation process of the hydrogel comprises the following steps: firstly, preparing a methacrylated gelatin hydrogel (GelMA) precursor by utilizing an amidation reaction of methacrylic anhydride (MA) and gelatin (Gel), and then realizing gelation by utilizing hydrogen bond interaction of a fish mucus freeze-dried product (MC) and GelMA and photo-crosslinking of the GelMA precursor and polyethylene glycol diacrylate (PEGDA) under ultraviolet light of 365nm. The mucus-methylacryloylated gelatin hydrogel (MC-GelMA) is obtained after the mucus-methylacryloylated gelatin hydrogel is prepared. The hydrogel prepared by the preparation method disclosed by the invention has excellent swelling resistance and mechanical strength. Meanwhile, the hydrogel also has good lubrication and drag reduction performance, and can be used as a ship drag reduction material.

The invention provides a stock bin grating blockage detection and automatic crushing motion control system based on machine vision, and relates to the field of image data processing, and the system comprises a blockage sensing module which is used for obtaining object sensing data of a stock bin grating based on infrared rays, and judging whether the stock bin grating is blocked or not; the image acquisition module is used for acquiring an image of the storage bin grid according to the object sensing data of the storage bin grid when the blockage sensing module judges that the storage bin grid is blocked; the blockage recognition module is used for judging whether blockage occurs on the stock bin grating according to the image of the stock bin grating and the object sensing data, and determining blockage information of the stock bin grating according to the image of the stock bin grating and the object sensing data when judging that blockage occurs on the stock bin grating; and the ore crushing module is used for generating a crushing scheme according to the blockage information of the stock bin grating and controlling an ore crushing mechanical arm to crush the ore according to the crushing scheme, and the device has the advantage that automatic detection and crushing of blockage of the stock bin grating are achieved.

The invention relates to the technical field of coating machines, and discloses a multi-drying coating machine which comprises a supporting plate body, a base material roller, a composite drying machine and a discharging roller, the two ends of the supporting plate body are rotationally connected with the base material roller and the discharging roller respectively, the composite drying machine is arranged between the base material roller and the discharging roller, a tension shaft is arranged between the base material roller and the composite drying machine, and the tension shaft is connected with the supporting plate body. A coating mechanism is arranged on one side of the tension shaft and comprises a rotary coating roller, a supporting base and a comma scraper, a coating base material is arranged between the rotary coating roller and the supporting base, the comma scraper is arranged on one side of the rotary coating roller, and ultrasonic vibration modules are arranged on the upper side and the lower side of the comma scraper; the ultrasonic vibration module changes an electromagnetic field around the comma scraper to enable the surface of the comma scraper to generate high-frequency vibration; the high-frequency vibration of the comma scraper not only optimizes the distribution of the coating, but also enhances the interaction between the coating and the base material, and effectively promotes the contact and permeation between coating molecules and the coating base material.

The invention provides a preparation method of coaxial aerogel fiber and temperature self-adaptive protective aerogel fabric, which comprises the following steps: weighing nano-crystalline cellulose powder and dispersing in deionized water to obtain nano-crystalline cellulose dispersion suspension, weighing phase change microcapsules and dispersing in the nano-crystalline cellulose dispersion suspension to obtain phase change microcapsules; a core layer spinning mixed solution is obtained; carrying out wet spinning on the nano aramid fiber spinning stock solution and the core layer spinning mixed solution through a coaxial spinning needle, and fully solidifying in a coagulating bath to obtain coaxial gel fibers; the coaxial gel fibers are subjected to multiple times of solvent replacement treatment, then washed to be neutral and finally subjected to freeze drying treatment, and the coaxial aerogel fibers are obtained. According to the fabric, the phase change microcapsules are perfectly wrapped in the aerogel fibers, and the fabric has good heat insulation performance, good mechanical performance, excellent low-temperature and high-temperature responsiveness and a good protection effect in an extreme environment.

The invention relates to the technical field of flame-retardant materials, in particular to a vanillin-derived nitrogen-phosphorus synergistic flame retardant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out aldehyde-amine condensation reaction on vanillin and p-phenylenediamine to generate a Schiff base intermediate with a characteristic group-C = N-; and carrying out addition reaction on the intermediate and reactive hydrogen connected with a phosphorus atom on 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, so as to obtain the vanillin-derived nitrogen-phosphorus synergistic flame retardant. The flame retardant obviously improves the flame retardant grade of the high polymer material under the condition of lower addition amount, does not release toxic and harmful gases in the combustion process, and meets the requirements of greenness and environmental protection. The flame retardant has good compatibility with high polymer materials such as thermoplastic polyurethane and the like. The preparation method of the flame retardant is controllable in reaction process, large-scale production is easy to realize, an innovative and feasible solution is provided for flame retardance of high polymer materials, and the flame retardant is expected to be widely applied to the fields of electronics, automobiles, buildings and the like.

The invention provides a mechanical oscillator quantum device based on a density photonic crystal and a preparation method thereof, and relates to the technical field of quantum device preparation. The invention discloses a mechanical oscillator quantum device based on a density phononic crystal. The mechanical oscillator quantum device comprises a substrate silicon wafer; the stress thin film layer is deposited on one side of the substrate silicon wafer, the lower surface of the stress thin film layer is in contact with the substrate silicon wafer, the stress thin film layer comprises a suspended window, and the part, corresponding to the suspended window, of the substrate silicon wafer is etched and removed; the phononic crystal layer is arranged on the upper surface of the stress thin film layer and is opposite to the suspended window, the phononic crystal layer comprises a plurality of nano cylinders which are not connected with one another, and no nano cylinder is arranged in the center of the phononic crystal layer; the metal layer is arranged at the center of the photonic crystal layer; a lower substrate silicon wafer; the lower substrate circuit is deposited on the upper surface of the lower substrate silicon wafer; the connecting module is deposited on the edge of the upper surface of the lower substrate silicon wafer, the connecting module is not connected with the lower substrate circuit, and the substrate silicon wafer is connected with the lower substrate silicon wafer through the connecting module after being inversely installed.

The invention provides blended gasoline as well as a preparation method and application thereof. The blended gasoline comprises the following components in percentage by weight: 40-60% of mixed light hydrocarbon, 25-40% of direct coal liquefaction naphtha and 8-22% of methyl tert-butyl ether, wherein the mixed light hydrocarbon is fraction hydrocarbon prepared by rectifying MTP byproduct mixed aromatic hydrocarbon, and the distillation range of the mixed light hydrocarbon is less than or equal to 165 DEG C. The finished product blended gasoline fully combines the advantages of the mixed light hydrocarbon with the distillation range of less than or equal to 165 DEG C, the direct coal liquefaction naphtha and the methyl tert-butyl ether in the MTP byproduct mixed aromatic hydrocarbon, realizes value-added utilization of the MTP byproduct mixed aromatic hydrocarbon, has the advantages of low colloid and mechanical impurity content and low sulfur content, can fully burn and release high heat value when being applied to the field of automobiles, and has the advantages of low energy consumption and low cost. Sediments generated during combustion are few, the content of sulfide in tail gas is low, and pollution to the environment is small.

The invention discloses a preparation method of anti-aging cellulose insulation paper, and belongs to the technical field of oil paper insulation for electrical equipment. The problems that in the prior art, the polymerization degree of cellulose insulation paper in an oil-paper insulation system is greatly reduced, so that aging is caused, the insulation performance is reduced, and the service life is shortened are solved. The preparation method comprises the following steps: firstly, pre-treating natural color softwood pulp, grinding the softwood pulp to different degrees, and mixing the softwood pulp; secondly, purifying the mixed paper pulp, screening out fine fibers, and replacing the screened-out fine fibers with aramid nanofibers to prepare mixed paper pulp containing the aramid nanofibers; adding the mixed paper pulp containing the aramid nanofibers into a sheet making machine, performing dehydration forming and drying to obtain raw paper, and performing calendaring to obtain the cellulose insulation paper. The aging resistance and the insulating property of the cellulose insulating paper are remarkably improved, and the performance requirements of the insulating paper for the ultra-high voltage transformer can be met.

The present application relates to the field of filling glue, and in particular to a high-flowability epoxy resin encapsulated bottom filling glue and a preparation method thereof. The high-flowability epoxy resin encapsulated bottom filling glue, in parts by mass, has the following raw materials: 40 to 60 parts of epoxy resin composition, 10 to 15 parts of active diluent, 20 to 25 parts of curing agent, 1 to 2 parts of accelerator, 20 to 35 parts of modified filler, 1 to 4 parts of coupling agent, 1 to 1.5 parts of leveling agent, and 1 to 3 parts of flame retardant. The epoxy resin encapsulated bottom filling glue prepared in the present application not only has good stress impact resistance, mechanical properties and flow properties, but also can maintain excellent moisture resistance, water resistance, corrosion resistance, acid and alkali resistance and other properties, thereby greatly improving the application performance of the filling glue and having very excellent application prospects.

The invention discloses conveyor equipment convenient to clean, and belongs to the technical field of conveyors, the conveyor equipment convenient to clean comprises a conveyor body, an ash scraping mechanism is mounted on the upper surface of the conveyor body, a spraying mechanism is arranged at the bottom of the conveyor body, and a cleaning mechanism is mounted on the inner side of the spraying mechanism; a drying mechanism is installed at the position, located on one side of the cleaning mechanism, of the bottom of the conveyor body, a supporting seat is installed on one side of the conveyor body, an auxiliary belt is rotationally connected to the upper surface of the supporting seat, and two first electric air cylinders are rotationally connected to one side of the supporting seat; a piston rod of the first electric air cylinder is rotationally connected with one side of the bottom of the auxiliary belt. On the basis that materials are conveyed, the conveying belt can be cleaned, and the conveying belt can be dried.

The invention provides an ultra-high-speed electric connector which comprises an insulating body, the insulating body is provided with a lengthwise slot, a plurality of terminal slots are formed in lengthwise side walls on the two sides of the slot respectively, and a fool-proof part is arranged in the slot and used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area which are located on the two sides of the fool-proof part; the plurality of terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and two sides of every two adjacent differential signal terminals are respectively provided with a grounding terminal; every two adjacent differential signal terminals and two grounding terminals located on the two sides of the two differential signal terminals form a terminal module, and the two differential signal terminals and the two grounding terminals of each terminal module and an insulating block inserted into the insulating body are formed in an embedded mode. The ultra-high-speed electric connector can enable signal transmission to be better and more stable.

The invention relates to the technical field of food packaging, in particular to an antibacterial fresh-keeping packaging film for food packaging and a preparation method of the antibacterial fresh-keeping packaging film, and aims at solving the problems that a traditional food packaging film is insufficient in antibacterial performance and not ideal in fresh-keeping effect. According to the preparation method, polyethylene resin and polylactic resin are taken as main raw materials, so that the packaging film is endowed with excellent mechanical property and barrier property, the oxidation process of food can be slowed down, the damage of oxygen to the food is reduced, the loss of nutritional ingredients in the food is prevented, and the freshness and nutritional ingredients of the food can be effectively kept; the modified nano-silver particles are added into the food, so that the growth and metabolic activities of microorganisms such as various bacteria and molds can be effectively inhibited, the risk that the food is polluted by the microorganisms is remarkably reduced, the deterioration of the food due to microbial decomposition is avoided, and the food quality is improved. Therefore, the quality and taste of the food are better maintained, and the shelf life of the food is prolonged.

The invention relates to the technical field of amorphous alloy dry-type transformers, in particular to an energy-saving and noise-reducing amorphous alloy dry-type transformer which comprises a base, a fixing frame, a high-voltage coil and a wire outlet copper bar, the fixing frame is installed on the base, the high-voltage coil is installed in the middle of the fixing frame, a wire outlet cylinder row is installed on the high-voltage coil, and the wire outlet cylinder row is installed on the base. According to the base, vertical displacement generated by vertical vibration of the fixing frame is converted into rotating force of the rotating rod, the rotating force of the rotating rod drives the transmission frame to vertically move, the vertically-moving transmission frame drives the driven rod to rotate in the single direction, and the rotating driven rod drives the transmission bevel gear to rotate; and the force of the rotating transmission bevel gear is converted into rotation of the fan blades, so that the rotating fan blades supply air to the high-voltage coil in the fixing frame.

The utility model discloses a gantry three-coordinate measuring machine, which comprises a cross beam, the cross section of the cross beam is an isosceles right triangle, and the cross beam comprises a hypotenuse part; a first right-angle notch part and a second right-angle notch part are respectively formed at two 45-degree corner parts of the cross beam; the sliding frame comprises a sliding frame connecting plate, and the sliding frame connecting plate is parallel to the bevel edge part; a first air floating sliding block and a second air floating sliding block are arranged at the bottom of the sliding frame connecting plate, the first air floating sliding block is in sliding contact with the first intersection part, and the second air floating sliding block is in sliding contact with the bevel edge part; a third air floating sliding block and a fourth air floating sliding block are installed on the top of the sliding frame connecting plate, the third air floating sliding block is in sliding contact with the second intersection part, and the fourth air floating sliding block is in sliding contact with the bevel edge part. Through the distribution of the six air floating sliding blocks, stable, effective and symmetrical sliding support can be realized for the cross beam, so that the sliding frame moves more stably, the abrasion of the sliding frame is reduced, the motion performance is obviously improved, the motion torsional pendulum is reduced, and the measurement precision of the measuring machine is improved.

The invention relates to the technical field of water-based binders, and discloses a high-heat-resistance water-based binder and a preparation method thereof.The high-heat-resistance water-based binder is prepared from, by mass, 40-60 parts of water-based epoxy resin, 15-20 parts of a high-temperature-resistant additive, 10-15 parts of a thiol-terminated hyperbranched polymer, 1-2 parts of a film-forming agent, 0.5-1 part of a dispersing agent, 1.5-2 parts of a defoaming agent, 3-4.5 parts of a curing agent and 12-30 parts of deionized water. Kaolin in the powdery material can react with sodium silicate and phosphate, an Al-O-Si three-dimensional framework and heat-resistant aluminum phosphate can be formed in the water-based binder, and high high temperature resistance is achieved. A formed Al-O-Si three-dimensional framework and heat-resistant aluminum phosphate are coated on the surface of the graphene, so that the impact resistance of the graphene nanosheet is improved; the thiol-terminated hyperbranched polyester can enlarge the free volume of the water-borne epoxy resin, facilitates molecular chain movement of the epoxy resin and improves the toughness.

The invention discloses a calcium-containing spray for preventing grape fruit cracking and a preparation method thereof, and belongs to the field of grape fruit cracking prevention, and the calcium-containing spray comprises the following components in parts by mass: 3-9 parts of bioactive peptide-polysaccharide chelated calcium, 5-8 parts of a cationic surfactant, 1-5 parts of a water-retaining agent, 0.3-0.85 part of sodium salt, 0.01-0.5 part of a growth promoter, 0.05-1 part of potassium fulvate and 50-800 parts of deionized water. The preparation method comprises the following steps: dissolving the bioactive peptide-polysaccharide chelated calcium, the sodium salt, the growth promoter and the potassium fulvate in deionized water, and then adding the water-retaining agent and the cationic surfactant to obtain a mixed solution; stirring the mixed solution at 60-85 DEG C, and then standing to obtain the calcium-containing spray for preventing grape fruit cracking, after spraying, a layer of uniform protective film can be formed, moisture permeation and external mechanical damage can be effectively reduced, osmotic pressure balance inside and outside cells can be effectively regulated, the stability of a cell structure can be maintained, and the grape cracking rate can be remarkably reduced.

The invention discloses an RTK high-precision positioning tamper construction data management method and system, and relates to the field of tamper construction in composite foundation engineering, and the method comprises the following steps: obtaining the GPS positioning data of different working parts of a tamper through a single-machine double-GPS module, and positioning the respective position and height; processing the obtained GPS positioning data by using an RTK technology to obtain high-precision position information; and according to the high-precision position information, whether the position of the rammer deviates from the ramming pile position or not is judged in combination with construction pile position distribution diagram data, and if deviation occurs, alarm information is sent out. Through the design of the single-machine double-GPS module, the position and height information of the rammer body and the rammer can be obtained at the same time, data synchronism is guaranteed, the problems that cost is increased and information synchronization is inconsistent due to the fact that a plurality of devices are used are solved, the overall performance and stability of the devices are improved, and the practicability is high. And the requirement on multi-position information in the construction process is better met.

The invention discloses a micro-nano satellite and rocket unlocking and separating mechanism which comprises a center rotating wheel structure, N extension sliding arms and N satellite locking and releasing structures, one end of each extension sliding arm is connected with the center rotating wheel structure, and the other end of each extension sliding arm is connected with one satellite locking and releasing structure; the central runner structure controls the plurality of connecting rods to realize synchronous opening and closing; the satellite locking and releasing structure adopts a steel ball for locking and releasing, so that the satellite is prevented from popping up in advance, and the satellite locking and releasing structure has higher loading capacity; the invention provides a satellite separation speed and separation force value solving method aiming at a satellite and rocket separation speed requirement; the unlocking separation mechanism is high in synchronism, large in load, light in weight, small in size, high in reliability and capable of ensuring that a satellite is safely separated from a rocket after entering an orbit.

The invention discloses a coating material for resisting hydrogen embrittlement in a high-temperature environment and a preparation method of the coating material, diffusion and aggregation of hydrogen atoms are effectively inhibited through a multi-layer structural design, and crack propagation and mechanical property deterioration caused by hydrogen embrittlement in the high-temperature environment are remarkably reduced. According to the coating, under the synergistic effect of the composite ceramic layer, the rare earth doping layer and the metal matrix and oxide composite layer, the hydrogen permeation resistance is greatly enhanced, the oxidation resistance and the fatigue resistance are improved, internal stress accumulation is remarkably reduced, and coating falling and structure cracking are effectively prevented. The coating material can provide more reliable long-term stability and mechanical performance under harsh conditions of high temperature, high pressure, corrosive gas and frequent thermal circulation, greatly prolongs the service life of equipment, reduces the maintenance cost, and effectively improves the safety and reliability of operation.

The invention discloses a method for resource utilization of clay vanadium-containing shale, and belongs to the field of solid waste resource utilization. Aiming at the situation that the clay vanadium-containing shale cannot be effectively utilized due to the fact that the vanadium grade is low and cannot meet the development and utilization requirements, so that resources are wasted, the vanadium grade in the clay vanadium-containing shale is improved through pre-enrichment, and the method mainly comprises the following process steps: (1) grading without grinding after crushing: crushing the clay vanadium-containing shale to be-(2-4 mm), and crushing the clay vanadium-containing shale to be-(2-4 mm); grinding is not needed, wet screening and grading are carried out with 25-45 [mu] m as the standard, oversize products and undersize products are obtained, and the undersize products are pre-enriched products I; (2) after-grinding three-section full-open-circuit short-process flotation is conducted on oversize products, the oversize products are ground to-74 microns and account for 50%-85%, then three-section full-open-circuit short-process flotation is conducted in the acid environment that the pH of ore pulp ranges from 3 to 4, and flotation concentrate is a pre-enriched product II; the collecting agent is compounded and assembled autonomously, and the novel combined collecting agent comprises the following components in percentage by mass: 50-75% of dodecyl guanidine hydrochloride and 25-50% of isooctyl alcohol. The combined inhibitor comprises the following components in percentage by mass: 30-50% of water glass and 50-70% of sodium fluosilicate.

The invention discloses a high-temperature superconducting composite wire rod forming method and a composite wire rod. The high-temperature superconducting composite wire rod forming method comprises the following steps of pipe penetrating; performing vacuum sealing; heating and vibrating; inclined mold passing; quenching; and rolling and pulling. The composite wire is manufactured through the forming method of the high-temperature superconducting composite wire. Through vacuum, local heating vibration, inclined hot drawing and quenching technologies, inner brazing filler metal is in a liquid state while the diameter of the pipe sleeve is reduced, the heating time is greatly shortened, too large extrusion stress caused to the high-temperature superconducting tape in the forming process is avoided, and superconductivity decline possibly caused by high temperature and stress strain in the forming process is greatly reduced. The continuous casting effect is formed under gravity and rapid air cooling through the vibration, inclined mold passing and quenching processes, the problem that filler gaps exist in the prior art can be reduced or even eliminated, and the low porosity is beneficial for improving the strength of the cable.

The present invention discloses a multi-target search method for swarm robots based on triangular cones. First, a method of expanding triangular cones is proposed, which can be applied to the prediction and avoidance process of various non-convex dynamic obstacles, which can not only effectively avoid obstacles but also reduce unnecessary obstacle avoidance processes; secondly, according to the two different states of the search process, a roaming direction cone and a target search cone are proposed for the roaming process and the collaborative search process respectively. The roaming direction cone improves the ability to develop global unknown environments, while the target search cone effectively enhances the local search ability. Both methods can effectively improve the search efficiency and can decide whether to change the direction, thereby reducing unnecessary rotation direction processes, that is, effectively reducing the search time consumption, energy loss and mechanical loss caused by the robot rotation direction process. Finally, the three improved methods are combined to construct a swarm robot multi-target search strategy to realize swarm robot multi-target task search.

The invention relates to a high-temperature resistant brazed die-casting aluminum alloy and a preparation method and application thereof. The alloy comprises Si: 0.05-0.8wt%; Fe: 0.8-3.0wt%; Ni: 0.005-1.5wt%; Mn: 0.3-1.5wt%; Mg: 0.005-2.50wt%; Zn: 0.005-3.0wt%; Cu: 0.005-1.0wt%; Ce: 0.005-0.20wt%; Cr: 0.01-0.5wt%; Ti: 0.01-0.25w%; B: 0.001wt%-0.1wt%; the sum of the weight percentages of other impurities is controlled to be less than 0.5wt%, and the remainder is Al; and the mass ratio P value of Fe to (Ni+Mn+Cr) is controlled to be 0.3-3:1. Compared with the prior art, the die-casting aluminum alloy prepared by the present invention has excellent die-casting property, high temperature resistance and brazing property.

The invention relates to the technical field of intelligent regulation and control, in particular to a constant-temperature intelligent valve control system and a control method thereof. The method comprises the following steps that a DDC analog quantity control signal is received in real time through a constant-temperature intelligent valve, standby mode vibration-free judgment and valve adjustment control analysis are conducted, and a valve position opening degree adjustment control mode and a valve flow adjustment control mode are generated; performing supply and return water temperature real-time monitoring and valve temperature difference calculation on the constant-temperature intelligent valve to obtain the actually measured temperature difference of the intelligent valve; performing valve regulation control logic response analysis on the constant-temperature intelligent valve to generate an intelligent valve basic regulation mode and an intelligent valve constant regulation mode; and the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve are obtained, and basic valve regulation and control processing and constant valve regulation and control processing are conducted on the constant-temperature intelligent valve, so that corresponding intelligent valve regulation and control work is executed. According to the invention, the control mode can be automatically adjusted according to actual requirements, and the method has high adaptability, accuracy and energy-saving performance.

The utility model provides a bearing disc for wafer semiconductor carrying equipment. The wafer bearing disc comprises a bearing disc body, bolt holes, a first bearing column, a second bearing column and limiting side plates, the first bearing surface is a placement position of a first size wafer on the first bearing column; the second bearing surface is a placement position of a second-size wafer on the second bearing column; the mechanical fork arm can pass through a gap between the first bearing column and the second bearing column from one side of the limiting side plate to pick and place wafers with different sizes; the utility model has the following advantages: the contact area between the bearing disc and the wafer is small, so that the possibility of scratching the wafer is reduced; the wafer is fixed through vacuum adsorption, so that mechanical or stress damage to the wafer caused by fixing modes such as a compression ring or a clamp can be effectively reduced; the wafer carrier has two bearing surfaces to adapt to functional characteristics of wafers of different sizes, can be used without being improved or replaced, and is simple in structure and low in failure rate.