253results about How to "Promote aggregation" patented technology

The invention relates to the technical field of image processing, in particular to a remote sensing image registration method based on convolution attention, which comprises the following steps: inputting an original remote sensing image pair into a convolution layer of a modal adapter to obtain original features, and processing the original features by adopting a convolution attention method to obtain target features; inputting the target feature as a modal adaptive feature into a feature encoder to obtain a feature descriptor; inputting the feature descriptors into a feature detector, and estimating global detection feature points by using conditional probability; and performing preliminary matching on the feature descriptors and the feature points by using an FLANN algorithm, and performing outer point elimination in combination with an RANSAC algorithm to obtain a registration result. According to the method, richer feature representation can be provided for remote sensing images of sparse and repeated texture areas, and the registration effect is improved.

The invention relates to a water ecological restoration system and a restoration method, and belongs to the technical field of water treatment. According to the water ecology restoration system, a retaining wall is arranged on the downstream of the junction of a branch and a river channel, and the river channel is divided into a restoration flow channel and a main flow channel through the retaining wall; a water inlet adjusting mechanism, a desilting cavity, a filter dam, a biochemical treatment cavity, a first overflow dam, an oxygenation cavity, a second overflow dam, a biological protection cavity and a water outlet adjusting mechanism are sequentially arranged on the remediation flow channel from upstream to downstream, a buffer pond is arranged on the river bank side of the biological protection cavity, a planting floating bed is arranged in the biological protection cavity, hygrophytes are planted on the planting floating bed, and a water outlet adjusting mechanism is arranged on the water outlet adjusting mechanism. Submerged plants are arranged at the bottom of the buffer pond. According to the device, aquatic organisms such as fishes can be sheltered, water can be purified, the water ecological restoration effect is good, facilities can be prevented from being destroyed by flood, and the aquatic organisms are protected during flood discharge.

The invention relates to a power transmission line fire smoke identification method based on improved YOLOv9. The method comprises the following steps: constructing a fire smoke image data set; constructing a power transmission line fire smoke detection model; inputting the training set into the power transmission line fire smoke detection model for training, and storing the optimal power transmission line fire smoke detection model obtained through training; and inputting a to-be-identified power transmission line fire smoke picture into the optimal power transmission line fire smoke detection model to obtain a power transmission line fire smoke picture detection result. According to the method, depth separable convolution is introduced, so that the calculation amount can be reduced, parameters are reduced, and the network detection speed is increased; a parallel weighted mixed domain attention module is adopted to enhance extraction of target features in the fire smoke image; the up-sampling content perception feature recombination network structure CARAFE has a larger receptive field, the perception of important content is enhanced, and the lightweight level of the model can be kept due to the fact that the operation amount is small.

The invention discloses a hydrophilic material and a hydrophobic material, a preparation method of the hydrophilic material and the hydrophobic material, and a gas-liquid separation filtering device equipped with the hydrophilic material and the hydrophobic material, the hydrophilic material comprises a substrate surface which is etched into a micro-nano structure, and a hydrophilic layer is formed on the surface of the substrate; the hydrophobic material comprises a base material and a hydrophobic layer, the surface of the base material is etched into a micro-nano structure, and the hydrophobic layer is formed on the surface of the base material; the windward side of the filtering device for gas-liquid separation is made of a hydrophilic material, the air outlet side of the filtering device for gas-liquid separation is made of a hydrophobic material, the hydrophilic material and the hydrophobic material can be folded surfaces or curved surfaces, and water gathered by the hydrophilic material and water intercepted by the hydrophobic material are recycled through water guide holes; the hydrophilic material is formed by carrying out surface plasma treatment activation on a base material and carrying out surface polymerization modification on a hydrophilic monomer; the hydrophobic material is prepared from a base material through surface plasma treatment activation and hydrophobic monomer surface polymerization modification. According to the cooling tower, the heat dissipation and cooling performance of the cooling tower can be guaranteed while the water resource recycling efficiency is guaranteed.

The invention discloses a lifting type guide chute, and relates to the technical field of guide chutes, the lifting type guide chute comprises a support frame and a guide chute body, and further comprises an adjusting mechanism arranged on the inner wall of the guide chute body, the adjusting mechanism comprises a rotating plate, a spring fixed above the rotating plate through a groove, a base plate fixed with the top end of the spring, and an adjusting assembly, according to the lifting type material guide groove, the adjusting mechanisms are arranged in the side plates of the material guide groove, when materials are discharged, the impact force of material descending can be relieved, scattered materials can be conveniently gathered in the middle of the conveying belt during discharging, the side plates are protected, the conveying belt is not prone to falling, and the material guide groove is convenient to use. And meanwhile, by adjusting the angle of the rotating plate, the discharging speed and quantity of the materials can be controlled, the discharging stability is further improved, the situation that the materials are excessively stacked, the conveying efficiency is affected, the conveying belt is protected is avoided, the maintenance frequency is reduced, and the service life of the conveying belt is prolonged.

The invention provides a self-supporting carbon-based material loaded with iron nanoparticles as well as a preparation method and application of the self-supporting carbon-based material, and belongs to the technical field of preparation and application of an electrocatalyst for removing nitrate in sewage. The preparation method of the self-supporting carbon-based material loaded with the iron nanoparticles comprises the following steps: providing a carbon felt subjected to acid pickling and water bath heating; the method comprises the following steps: mixing an iron precursor and urea in a solvent to obtain a mixed solution containing iron salt; and mixing the carbon felt with the mixed solution containing the iron salt, and carrying out a hydrothermal reaction to obtain the self-supporting carbon-based material loaded with the iron nanoparticles. When the iron nanoparticle-loaded self-supporting carbon-based material provided by the invention is used as a cathode for electro-catalysis of nitrate-containing wastewater, a good removal rate and ammonia nitrogen selectivity are achieved, and the catalyst can keep relatively high nitrate nitrogen removal and ammonia nitrogen production effects under the conditions of acidity, neutrality, alkalinity and different initial nitrate concentrations; the method has the advantages of high removal efficiency, good ammonia nitrogen selectivity, strong stability and the like.

The invention discloses a compound traditional Chinese medicine patch for conditioning hyperplasia of mammary glands and a preparation method thereof, and relates to the technical field of traditional Chinese medicine preparations. The compound traditional Chinese medicine patch for conditioning hyperplasia of mammary glands is prepared from an iron-based metal organic framework composite drug carrying system, dopamine hydrochloride, a blank gel matrix, ethyl oleate, menthol, a solubilizer, a wetting agent and water, the iron-based metal organic framework composite drug loading system is composed of traditional Chinese medicine dihydric alcohol plastid, iron-based metal organic framework nanoparticles and cinnamomum camphora essential oil. The traditional Chinese medicine dihydric alcohol plastid and the cinnamomum camphora essential oil are loaded in the iron-based metal organic framework nano particles, so that the transdermal absorption of the medicine is improved, the pH response release property is realized, the dosage of active ingredients permeating into a focus part and the lasting action time are effectively increased, and then a coating layer is formed by polydopamine, so that the anti-inflammatory effect is improved. The dispersibility and compatibility of the drug loading system in vivo are further enhanced, the drug effect can be fully exerted, and the treatment effect on the hyperplasia of mammary glands is remarkably improved.

The invention discloses a motion group classification and behavior pattern recognition method based on track semantic similarity. The sports group classification method comprises the following steps: step 1, acquiring riding sports data to obtain riding track data; step 2, performing road network matching to obtain a road type of each riding track point; segmenting each riding track according to the road type to obtain a plurality of riding track segments; behavior attributes and motion attributes are determined, attribute calculation is carried out, and semantic assignment is carried out on the riding track segments to obtain semantic track segments; step 3, calculating semantic trajectory similarity to obtain a similarity matrix; and step 4, a similarity network is constructed according to the similarity matrix, community detection is performed by using the similarity network to obtain a plurality of communities, and each community is a sports group category. According to the method, exercise group classification and complex riding exercise behavior pattern recognition can be effectively carried out, and a scientific basis is provided for planning and construction of cities such as greenways and personalized services and management for different exercise groups.

The invention discloses a coagulant for industrial wastewater treatment and a preparation method thereof, and belongs to the technical field of water treatment.The coagulant comprises a main flocculant and an auxiliary flocculant, the main flocculant is polyferric sulfate and / or polyaluminum chloride, and the auxiliary flocculant is organic modified diatomite; the organic modified diatomite is prepared by condensing aminated diatomite and a carboxylation modifier; the aminated diatomite is diatomite treated by an aminated silane coupling agent. The auxiliary flocculant not only has a porous characteristic, active functional groups on the surface can adsorb metal cations, and the auxiliary flocculant can be integrally used as a crystal nucleus to promote growth and aggregation of other precipitates (such as ferric hydroxide, aluminum hydroxide and the like) on the surface, so that the precipitation process is accelerated, the removal efficiency of pollutants in wastewater is improved, and the wastewater treatment effect is improved. The effect of enhancing coagulation is achieved.

The utility model discloses an air conditioner condensate water collecting device which comprises an air conditioner drainage system, a collecting box and a processing box, the air conditioner drainage system is communicated with the collecting box, a guide frame is arranged on the right side in the collecting box, and a sensor is arranged in the guide frame. The sensor comprises an upper pole piece located on the upper side of the guide frame and a lower pole piece located on the lower side of the guide frame, a floating ball is slidably connected to the interior of the guide frame, a movable scraping plate is tightly attached to the inner wall of the collecting box, a sealing plate is fixedly connected to the bottom of the scraping plate, and a water outlet is formed in the bottom of the collecting box. The sealing plate is tightly attached to and slides in the water outlet, the treatment box is communicated with the collection box, a water pump is arranged at the inner bottom of the treatment box, and the output end of the water pump penetrates to the outside of the treatment box and is fixedly connected with a conveying pipe. By means of the structure, condensate water which is about to be fully collected in the collecting box can be automatically discharged and used.

The invention provides a composite hydrogel based on chitosan and an acellular matrix. The composite hydrogel comprises methacrylic acid chitosan and a methacrylic acid modified acellular matrix, the prepared composite hydrogel has good injectability, good degradability and relatively high mechanical properties, and can regulate the aggregation of the bone marrow mesenchymal stem cells (BMSCs), and the bone marrow mesenchymal stem cell composite hydrogel has a remarkable effect of repairing transparent cartilage by transplanting a cartilage defect model.

The present invention belongs to the technical field of nickel-based alloy connection, and specifically relates to a brazing method for improving the high-temperature welding performance of nickel-based alloy joints and a prepared multi-layer welded joint. First, the brazing material is processed into an amorphous brazing foil, and then the amorphous brazing foil is pre-placed between the joint surfaces of the workpieces to be welded of the Inconel625 nickel-based alloy, and then the workpieces to be welded are fixed and placed in a vacuum brazing furnace for brazing. After the brazing is completed, the workpiece group is cooled to below 100°C and then solution treated in a vacuum brazing furnace. The amorphous foil-shaped brazing material used in the present invention has a small difference in melting point from the parent material, which is conducive to capillary action and can optimize the formation and performance of the brazed joint; the solution treatment can improve the distribution and morphology of brittle phases such as borides in the brazing seam. The present invention can be used as a special brazing method for multi-layer brazing joints or Inconel 625 nickel-based alloys, and has great application prospects.

The invention relates to the technical field of adsorbents, in particular to a self-floating beta-ketoenamine covalent organic framework-chitosan aerogel adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing the TpPa-1-COF nano particles; s2, ultrasonically dissolving CS in an acetic acid aqueous solution to obtain a CS acetic acid aqueous solution; s3, performing ultrasonic dispersion on the TpPa-1-COF nanoparticles in ultrapure water, and then uniformly mixing a COF aqueous solution with a CS acetic acid aqueous solution to obtain a COF / CS mixed solution; s4, heating the COF / CS mixed solution to form COF / CS hydrogel, aging the COF / CS hydrogel at room temperature, and freeze-drying the COF / CS hydrogel to obtain the self-floating beta-ketoenamine covalent organic framework-chitosan aerogel adsorbent. The aerogel adsorbent disclosed by the invention has the characteristics of wide pH application range, high adsorption capacity and easiness in recovery in the aspect of recovering noble metals in wastewater, and particularly shows high-selectivity adsorption on Au.

The invention discloses a deep-sea mining plume inhibition technology using an AUV (Autonomous Underwater Vehicle) to add a flocculating agent, which comprises a mine car, a solution mixing container is arranged in the mine car, a stirrer is arranged on the solution mixing container, a second flow pump is arranged on the left side of the solution mixing container, and one end of the second flow pump is connected with the solution mixing container through a conveying pipeline; the other end of the solution mixing container is connected with a water pumping pipeline through a conveying pipeline; a jet flow pump is arranged on the left side of the solution mixing container; a flocculating agent is accurately added through the AUV, aggregation and sedimentation of suspended particulate matter are promoted, formation and diffusion of plume are effectively inhibited, pollution of deep-sea mining to the marine environment is reduced, the AUV can conduct autonomous navigation and control operation underwater, the system can adapt to the complex deep-sea environment, and the service life of the system is prolonged. The application scene of the technology is wide, the flocculant can be used for reducing plume generation, the drag reducer can also be used for reducing water jet resistance, and the mining efficiency is improved.

The invention relates to the technical field of federated learning optimization, and provides a federated learning method for non-independent identically distributed data in an edge intelligent controller, and the method is characterized in that the method comprises the following steps: S10, selecting a node subset St which is pre-participated in global aggregation; s20, nodes are selected from the node subset St for local training of the model, and the model weight and the gradient of the loss function are sent to a server; s30, calculating the contribution degree of each node to global model convergence, and selecting a node subset # imgabs0 # which really participates in the current round of global aggregation; S40, selecting nodes from the node subset # imgabs1 # and reconstructing the model weights of the nodes; s50, performing score assignment on the nodes according to contribution values of the nodes in the node subset # imgabs2, and performing global aggregation to obtain a global model weight; and S60, adjusting the probability that each node is selected in the next round of training. According to the method, the nodes are selectively selected for global aggregation, the contribution degree of the nodes to global model training is better represented, and therefore the training effect is better improved.

The invention provides a method for preparing a composite solid electrolyte through a Lewis fluorine supply nano additive, and the composite solid electrolyte comprises the following components in parts by weight: 10-20 parts of a polymeric monomer, 2-6 parts of a lithium salt, 1-4 parts of a nano functional additive and 5-12 parts of an organic solvent. When the prepared composite solid electrolyte is used for a lithium ion battery, the composite solid electrolyte has the characteristics of no need of an additional initiator, uniform polymerization reaction, high ionic conductivity and the like, and the stability, the rate and the cycle performance of the semi-solid lithium ion battery can be improved; according to the preparation method, no extra initiator is added into the preparation raw materials of the in-situ cured solid electrolyte, the lithium salt is instably decomposed into the lewis acid in a heating state, the lewis acid is utilized to efficiently initiate ring-opening of cyclic ether to perform polymerization reaction, no initiator is left, and no extra side reaction is generated to cause reduction of battery performance.

The invention relates to a sludge conditioning and dewatering composite agent and a preparation method thereof. The sludge conditioning and dewatering composite agent comprises a high-molecular polymer, wherein the high-molecular polymer comprises a 1-vinyl-2-pyrrolidone copolymerization unit and a copolymerization unit comprising an alkenyl group and an amino group or an acylamino group; and a tannic acid-inorganic salt complex. The sludge conditioning and dewatering composite agent can efficiently flocculate fine particles, increase the particle size of sludge, improve the sludge-water separation speed and promote deep dewatering of sludge.

The invention relates to the technical field of ecological restoration, in particular to a method for improving the transplanting survival rate of saplings in a hydro-fluctuation belt of a hydropower station reservoir area in a dry-hot valley area, which comprises the following steps: mixing a composite slow-release fungicide composition, saplings and seedling raising soil, putting the mixture into planting pits, and maintaining; the composition comprises the following raw materials: arbuscular mycorrhizal fungus powder, plant growth-promoting rhizobacteria, an alginate aqueous solution, a salicylate aqueous solution and a calcium chloride solution. The preparation method of the composition comprises the following steps: mixing the arbuscular mycorrhizal fungi, the plant growth-promoting rhizobacteria and the salicylate aqueous solution to obtain a mixture; dropwise adding the mixture into an alginate aqueous solution to form a mixed solution; and mixing the mixed solution with a calcium chloride aqueous solution, and curing to obtain the composite slow-release fungicide composition. The composite slow-release fungicide composition is mixed with saplings, so that the survival rate of the saplings is increased, and the ecological restoration rate of a hydropower station reservoir area in a dry and hot valley area is increased.

The utility model provides a pipe cutting, clamping and fixing device which comprises lower supports and a placing plate, and the lower supports are supported on the left side and the right side of the upper end of the placing plate through bolts. A supporting and collecting box fixing structure is supported at the middle part in the placing plate; a movable pressing seat structure is supported at the upper end of the lower support; threaded vertical rods are movably embedded in the front side and the rear side of the upper portion in the lower support; the supporting, collecting and fixing box structure is characterized in that the supporting, collecting and fixing box structure comprises a sleeve box, and a collecting net is welded to the middle of the upper side of the interior of the sleeve box; a drawing box is inserted into the lower side in the sleeve box; and base plates are glued to the left and right sides of the upper end of the sleeve box. Through the arrangement of the supporting and collecting box fixing structure, the cutting position of the pipe is supported, and the situation that the fastening performance and the sealing performance after laying and installation are affected due to the fact that the cutting position is uneven due to vibration in the cutting process is avoided.

The invention relates to the technical field of biological medicines, and particularly discloses application of chrysophyceae laminarin in preparation of medicines for promoting tumor cell aggregation and inhibiting tumor cell migration and diffusion. The chrysophyceae laminarin provided by the invention has the effects of promoting tumor cell aggregation and inhibiting tumor cell migration and diffusion, has a potential treatment effect on clinical treatment of tumor metastasis diseases, and can be used for research and development of related drugs.

The invention relates to the technical field of printing and dyeing wastewater treatment, and discloses a printing and dyeing wastewater treatment device with a multi-stage separation function, which comprises a sedimentation tank, an auxiliary separation assembly arranged at the top of the sedimentation tank and used for assisting in sedimentation of printing and dyeing wastewater, and an amplitude adjusting assembly arranged above the sedimentation tank and used for adjusting the sliding amplitude of the auxiliary separation assembly, an anti-blocking assembly used for guaranteeing smooth drainage is arranged in the sedimentation tank, through the arrangement of an auxiliary separation assembly and an amplitude adjusting assembly, continuous flapping action can be achieved, regular physical disturbance is generated in wastewater, pollutant particles can be better gathered and precipitated in the printing and dyeing wastewater, and through the continuous physical disturbance, the pollutant particles can be effectively separated from the sedimentation tank. According to the device, pollutants in the printing and dyeing wastewater can be settled in a short time, so that compared with a traditional settling pond, the settling efficiency is greatly improved, the retention time of the wastewater in the settling pond is shortened, and the treatment capacity of a whole printing and dyeing wastewater treatment system is improved.

The invention discloses a secondary battery, a battery pack and a power utilization device, the secondary battery comprises a shell, an electrode assembly and a top cover assembly, and the shell is provided with an accommodating cavity for accommodating the electrode assembly; the top cover assembly comprises a top cover sheet and a lower insulating part; the top cover sheet is connected with the shell and covers the accommodating cavity; the lower insulating part is connected between the top cover plate and the electrode assembly; a pressure relief piece is arranged on the top cover piece, the lower insulating piece is provided with a second groove, the second groove is formed in the side, facing the electrode assembly, of the lower insulating piece, and the second groove is communicated with the containing cavity; the second groove is provided with a second bottom wall, the second bottom wall and the pressure relief piece are arranged at an interval, and the second bottom wall is configured to be exploded when the internal pressure of the secondary battery reaches a threshold value, so that the internal pressure of the secondary battery directly acts on the pressure relief piece. The second groove is formed in the lower insulating part, the second bottom wall is used for shielding the top cover piece so as to reduce the area, exposed out of metal, of the top cover piece, normal pressure relief of the battery is achieved through explosion of the second bottom wall, and the safety of the secondary battery is improved.

The invention provides styptic powder based on tannic acid modified gelatin as well as a preparation method and application of the styptic powder. The modified gelatin is a compound formed by chemically crosslinking and blending tannic acid and pre-crosslinked gelatin, the tannic acid can be uniformly distributed in a gelatin network, and the tannic acid serving as an exogenous hemostatic active substance can be subjected to rapid non-covalent interaction such as H bonds and pi-pi stacking with proteins in blood to form microclots; gelatin particles are promoted to rapidly infiltrate blood and settle, so that aggregation of platelets and red blood cells is accelerated, and gelatin can accelerate activation of an endogenous hemostasis pathway, so that a synergistic effect is formed, and rapid hemostasis is realized. In addition, tannic acid also has good antibacterial activity, wound infection after hemostasis can be effectively avoided, and the tannic acid is especially suitable for emergency hemostasis in outdoor first aid.

The invention relates to the technical field of sewage treatment, and discloses a cationic etherifying agent composition for sewage treatment and a preparation method thereof. The cationic etherifying agent composition for sewage treatment is obtained by mixing gemini imidazoline quaternary ammonium salt etherified starch, a chitosan-based graft modified copolymer and poly-aluminum silicate. Nitrogen atoms on an imidazoline ring and a pyrrole ring, hydroxyl and amino can form hydrogen bonds in the flocculation process, so that the interaction between the composition and colloidal particles is enhanced, and the flocculation effect is improved; positive charges in quaternary ammonium salt can react with negative charges carried by suspended particles in sewage, so that the particles are more easily gathered, and the flocculation performance is improved; chitosan and starch molecular chains are relatively long, so that a plurality of pollutant molecules can be adsorbed at the same time, and a bridging effect is achieved; a gemini imidazoline quaternary ammonium salt structure and a cation modified pyrrolidone structure are introduced into starch and chitosan molecules, so that active sites of the starch and chitosan molecules are increased, and the flocculation effect is further enhanced.

The invention provides a nano material suitable for multi-mode diagnostic imaging and targeted photodynamic (PDT) and photo-thermal (PTT) cancer therapy, and belongs to the field of nano biomedicine. According to the invention, an upconversion material (NaYF4: Yb / Er / Gd) and a photo-thermal material (Bi2Se3) are taken as a core, mesoporous silica is taken as a shell, and a photosensitizer (Ce6) and lipid / PEG and acidity-triggered membrane (ATRAM) peptide coated on the surface of the shell are loaded. The PDT and PTT synergistic anticancer effect achieved through near-infrared laser induction is achieved, magnetic resonance imaging, thermal imaging and fluorescence imaging of tumors can be achieved, and the requirement for diagnosis and treatment integration is met. In addition, the in-vivo lifetime of the nano-carrier is effectively prolonged through lipid / PEG, and aggregation and premature degradation of the nano-carrier are prevented; and the pH-mediated acidity-triggered membrane peptide is utilized to improve the uptake of cancer cells to the nano-carrier, so that the effect of the nano-carrier and the cancer cells is enhanced.

The invention discloses a method for creating a high-frequency introgression Chinese cabbage-cabbage introgression line, and relates to the technical field of introgression breeding. According to the method, tetraploid Chinese cabbage and diploid cabbage are subjected to interspecific hybridization to obtain an allotriploid hybrid (AAC), then the AAC is subjected to hybridization and selfing with diploid Chinese cabbage, and a Chinese cabbage-cabbage introgression line with a high-frequency introgression exogenous species genome sequence is created in combination with free microspore culture. According to the invention, the heterotriploid hybrid mediated genetic system is utilized to realize interspecific high introgression, and a new method is provided for breaking the bottleneck of low exogenous species introgression frequency.

The utility model relates to the technical field of radiators, in particular to a novel wind-gathering radiator which comprises a siphon heat conduction pipe, a substrate, a radiating fin group and a PAD, one side of the substrate is suitable for being attached to a heat source, the other side of the substrate is fixedly provided with the siphon heat conduction pipe, part of the siphon heat conduction pipe protrudes out of the substrate and is fixedly provided with the radiating fin group, one end of the radiating fin group faces a system air inlet, and the other end of the radiating fin group faces a system air outlet. A sintered capillary structure is arranged in the siphon heat conduction pipe, the sintered capillary structure is filled with a condensing medium, and the attached position of the substrate and the heat source is filled with the PAD. According to the utility model, after the heating source generates heat, the heat passes through the substrate along the PAD, then the heat is transferred to the siphon heat conduction pipe by the substrate, and the siphon heat conduction pipe brings the heat to the heat dissipation fin group, so that air takes away the heat dissipated from the surface of the heat dissipation fin group. And the heat is dissipated into the air through the air quantity provided by the system, so that the problem that the air quantity provided by the system is difficult to gather and dissipate in a specific space in the prior art is solved.

The present application relates to the field of coatings, and in particular to a coating material for a film-coated aluminum plate and a preparation method thereof. The coating material for a film-coated aluminum plate comprises, by weight, 75 to 95 parts of aqueous polyurethane emulsion, 25 to 40 parts of modified functional resin, 20 to 30 parts of modified particles, 5 to 15 parts of auxiliary agent, 6 to 12 parts of dispersant, 2 to 5 parts of adhesion promoter, 5 to 8 parts of curing agent, 1.5 to 3 parts of leveling agent, 0.5 to 1.5 parts of defoaming agent, and 140 to 200 parts of deionized water. The coating material for the laminated aluminum plate prepared in the present application uses polyurethane as the main material to ensure its adhesion to the laminated aluminum plate, and on this basis, greatly enhances the waterproofness, antistatic properties, weather resistance, light resistance and other properties of the coating material during long-term use. Different from the existing surface coating materials for laminated aluminum plates, it can take into account and balance multiple surface properties, thereby enhancing the application effect of the laminated aluminum plate, avoiding the technical problems of the existing coating materials for laminated aluminum plates, and has very excellent market and application prospects.

The utility model relates to the technical field of sprayer devices, and discloses a hand-push type sprayer which comprises a cart frame, a water tank and a pump body, the water tank and the pump body are both arranged on the cart frame and are communicated through a water pipe, the bottom of the water tank is provided with a low-residual-water mechanism used for reducing the residual water amount after water pumping, and the pump body is arranged on the cart frame. The low-residual-water mechanism comprises a water outlet, a sinking groove and a flow guide inclined face, the end, away from the pump body, of the water pipe is arranged in the sinking groove, the water outlet is communicated with the sinking groove, the water tank comprises an inner bottom face, the sinking groove comprises a groove bottom face, the groove bottom face is lower than the inner bottom face, and the flow guide inclined face is formed between the inner bottom face and the groove bottom face. The hand-push type sprayer is provided with the low residual water mechanism, the residual water amount at the bottom of the water tank after water pumping can be reduced, water and pesticide in the water tank are utilized more sufficiently, and the influence of the residual pesticide on the surrounding environment is reduced.