75results about How to "Play a role in enhancing" patented technology

The invention discloses an unbalanced ship classification method based on a deep convolutional neural network. The method comprises the steps of 1) obtaining basic data; 2) carrying out data processing; 3) constructing a model; 4) defining a loss function; 5) training a model; 6) applying the model. According to the invention, fine classification of ships and solving of the problem of unbalanced category data distribution are combined; on the basis of extracting the global features of the ship, the local features with category discrimination of the ship are introduced, so that the model learnsdetails of the ship, and the classification result is more accurate; a memory network and a fusion learning network are used for storing and emphatically learning samples which are difficult to learn; the learning of the samples is improved while the new samples are learned, the effect of rebalancing the category data distribution is also achieved, and the adverse effect on model training causedby unbalanced category data distribution in an actual scene is effectively avoided.

The invention discloses a stone surface treating agent, which comprises an A component and a B component, wherein the A component comprises the following raw materials in parts by weight: 150-400 parts of alkali metal silicate solution with the concentration of 5-40 percent by weight, 150-400 parts of acid saline solution with the concentration of 1-20 percent by weight and 3-80 parts of high polymer emulsion; and the B component comprises the following raw materials in parts by weight: 200-400 parts of silica gel, 50-400 parts of alkali metal silicate solution with the concentration of 5-40 percent by weight and 2-80 parts of high polymer emulsion. The invention further discloses a preparation method of the treating agent and a stone surface treating method. The stone surface treating agent prepared with the preparation method is a polishing material which takes an inorganic components as major components, is weakly acidic or weakly alkaline, has small chemical corrosion on stone, contains a small quantity of organic components, can overcome the defect of a pure wax organic material film and can achieve a mirror effect. The stone surface treating agent can be applied to stone surface polishing together with any electric tool and a universal cushion, and can be used for polishing polished tiles, microlite and the like.

The invention discloses preparation and an ageing treatment process for a Al-Mg-Si-Er aluminum alloy plate material, belonging to the technical field of metal alloy. The preparation method comprises the following steps: preparing metal ingots by adopting a semi-continuous casting method; homogenizing the metal ingots; respectively performing hot rolling and cold rolling on a rolling mill of 310*480mm, wherein the heating temperature of the hot rolling is 450 DEG C; and preserving the temperature for 2 hours, wherein the final rolling thickness is about 2mm. One process condition is that: 1 to 50 hours of ageing heat treatment is performed at 180 DEG C after solution treatment; and the other process condition is that: 1 hour of regression heat treatment is performed at 220 DEG C based on 7 hours of ageing at 180 DEG C, and the alloy is re-aged for 1 to 24 hours at 150 DEG C after regression treatment. The alloy treated by the process has higher strength, the 230MPa using performance requirement of the alloy can be well fulfilled, and the corrosion resistance and plasticity of the alloy can be improved.

The invention discloses a formula of composite low-melting-point nylon 6, comprising the following components in part by weight: 90-98 parts of nylon 6, 5-6 parts of anhydrous calcium chloride and 2-10 parts of organic montmorillonite. In the invention, the mode of firstly blending the nylon 6 and the organic montmorillonite for extrusion and granulation and then blending the obtained mixture with the anhydrous calcium chloride for extrusion and granulation to manufacture the low-melting-point nylon 6 is adopted, and the problem that calcium ions react with silicate in the organic montmorillonite to inhibit the dispersion of the organic montmorillonite in the low-melting-point nylon 6 is solved, so that the organic montmorillonite can be fully dispersed in the low-melting-point nylon 6, and further the mechanical property of the low-melting-point nylon 6 is improved. In addition, the invention is simple and is easy to implement, the production cost is low, and the service effect is ideal.

The invention discloses an attribute reasoning and product recommendation method based on an adaptive graph convolutional network. The method comprises the following steps: 1, constructing heterogeneous data: a scoring matrix of a user to a product, a user attribute matrix, a product attribute matrix, a user attribute index matrix and a product attribute index matrix; 2, performing missing value filling preprocessing on the user attribute matrix and the product attribute matrix; 3, obtaining a cooperative matrix through one-hot coding; 4, constructing a feature fusion layer according to the attribute matrix and the collaborative matrix; 5, carrying out feature propagation through a graph convolution layer; 6, constructing a prediction layer to perform attribute reasoning and product recommendation; 7, updating the node attribute matrix according to the output result of the prediction layer; and 8, repeating the steps 4-7 until the attribute reasoning and product recommendation effectsare optimal. According to the method, the high-order structure information of the graph, the internal interaction between the node attributes and the potential association between the node attributesand the link relationship can be fully mined, so that more accurate attribute reasoning and product recommendation are realized.

The invention discloses a copper-based powder metallurgy brake pad material as well as a preparation method and application thereof. The copper-based powder metallurgy brake pad material is prepared from the following raw materials in percentage by weight: 54 weight percent to 67 weight percent of copper powder, 13 weight percent of graphite, 4 weight percent to 17 weight percent of iron powder, 8weight percent to 14 weight percent of a ferrochrome alloy, 1 weight percent to 4 weight percent of silicon carbide and 1 weight percent to 4 weight percent of silicon dioxide; the preparation methodof the copper-based powder metallurgy brake pad material comprises the following steps: 1) weighing the raw materials according to the ratio and putting the raw materials into a mixer and uniformly mixing; 2) filling the mixed raw materials into a mold; carrying out hot pressing sintering or spark plasma sintering under the protection of a vacuum atmosphere or nitrogen gas to obtain the brake padmaterial with excellent comprehensive performance. The prepared brake pad material has high density and rigidity, stable friction coefficient, abrasion resistance and excellent comprehensive performance, and can meet the requirements on braking friction plates of high-speed rail trains. The copper-based powder metallurgy brake pad material disclosed by the invention can be used for preparing a brake pad; the preparation method comprises the following steps: taking Q235 as a base material, and compounding and sintering the raw materials for preparing the copper-based powder metallurgy brake pad material and the base material through a hot pressing sintering technology, so as to obtain the brake pad.

The invention relates to a silsesquioxane-modified hybrid phenolic resin, and a preparation method and an application thereof, and belongs to the field of high-performance resin matrix composite materials. The silsesquioxane-modified hybrid phenolic resin provided by the embodiment of the invention is a hybrid phenolic resin cured product with a POSS molecule as a chemical crosslinking point, formed through reacting the POSS molecule represented by formula (1) with phenolic resin, and the addition of a POSS hybrid molecule strengthens nanoparticles, so the initial maximum decomposition temperature of the resin is improved to about 580 DEG C from 450 DEG C of pure resin, the residual weight is increased to about 65% from 58%, and the ablation resistance of the material is remarkably improved; and the POSS-modified hybrid phenolic resin provided by the invention has potential application prospects in the field of aerospacecraft resin-based advanced thermal protection materials.

The invention discloses a nano stone surface treating agent which comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 1-2 parts of 5-10 wt% oxalate solution, 3-5 parts of 5-10 wt% fluosilicate solution, 6-9 parts of 30-50 wt% pure acrylic emulsion and 4-9 parts of water. The component B comprises the following raw materials: 3-5 parts of 15-20 wt% acrylic resin isopropanol solution, 1-2 parts of polyethylene wax or microcrystalline wax and 3-6 parts of solvent. The components A and B in the nano stone surface treating agent are both nano materials, and have favorable permeation and adhesion properties. The component A and component B are sequentially subjected to grinding treatment, so that the blend crystallizing layer formed by the component A and the specular layer formed by the component B form a firm and hard surface, thereby greatly enhancing the glossiness and being beneficial to enhancing the durability of the high glossiness of the stone surface.

The invention discloses a tunnel settlement time sequence prediction method based on CEEMDAN-BiLSTM, and the method comprises the following steps: collecting ground surface settlement data above a tunnel, sequentially recording the settlement value of each collection point according to the time sequence, obtaining a single-dimensional tunnel settlement time sequence, and carrying out the preprocessing of the single-dimensional tunnel settlement time sequence; carrying out complete ensemble empirical mode decomposition of adaptive noise on the preprocessed tunnel settlement time sequence to obtain n stable intrinsic mode function IMF1-IMFn components with different scales and a residual error Res component; determining a time scale, reconstructing the decomposed IMF components and errors Res, normalizing unified dimensions, and determining a training set and a test set; establishing a bidirectional long-term and short-term memory network prediction model for each training set and each test set, and predicting a tunnel settlement subsequence; and reversely normalizing the tunnel settlement sub-sequences under different scales, superposing the tunnel settlement sub-sequences to obtaina final tunnel settlement result, and evaluating the prediction effect and stability of the model according to different evaluation indexes.

The invention discloses a self-enhancement-toughening silicon nitride/ aluminum nitride/ lanthanum barium silicate glass ceramics ternary composite material with self-enhancement-toughening and a preparing method of the ternary composite material. The ternary composite material adopts lanthanum barium silicate glass powder, aluminum nitride powder and alpha-silicon nitride powder as raw materials, is prepared through blanking and sintering, and contains beta-silicon nitride rod-like crystal. The silicon nitride/ aluminum nitride/ lanthanum barium silicate glass ceramics ternary composite material has the advantages of being low in density, high in strength, high in fracture characteristic, high in dielectric constant, low in inflation coefficient, high in conductivity and the like. The preparing method of the ternary composite material is simple in preparing process and low in the glass melting temperature and the composite material sintering temperature, and the ternary composite material is friendly to environment and low in production cost. The prepared ternary composite material has a good application prospect, can partially replace an existing high temperature structure material, and is applied in the fields of national defense and military industries, electronic devices, high thermal conductivity ceramic baseplates, high-end ceramic parts and the like.

The invention provides an integrally-woven crucible prefabricated body which is a net-shaped body formed by weaving one or more carbon fiber ropes, and the crucible prefabricated body is formed by densely weaving an opening in the upper end and a compact weaving at the lower end. The crucible is formed by weaving one carbon fiber rope or a plurality of carbon fiber ropes, so that a prefabricated body is unnecessary and working hours are reduced. According to the crucible, straight carbon fiber ropes are adopted for weaving, so that a blank body does not need to be manufactured, the shape plasticity is high, limitation of the blank body is avoided, flexible design and batch production can be achieved, the delivery period is shortened, and material machining waste is little.

The invention discloses a lake sediment curing agent, and relates to the technical field of sediment treatment. The lake sediment curing agent is prepared from the following raw materials in parts byweight: 3 to 5 parts of polymeric aluminum chloride, 1 to 2 parts of carboxymethyl cellulose, 25 to 35 parts of modified shell powder, 10 to 15 parts of polyacrylamide, 1 to 1.5 parts of N,N-methylenebisacrylamide, 0.5 to 1 part of acrylic acid and 5 to 10 parts of a promoter. The raw materials do not contain curing materials such as cement, lime, and the like, the pH value of cured sediment is neutral, and thus subsequent resource utilization is facilitated.

Disclosed is a reinforced-bar concrete prefabricated slab comprising a slab (1), characterized in that the slab (1) is provided with at least an anticracking sheet for seepage control or/and anticracking. The invention can be applied to various hollow slabs, hollow building covers, house roofings, foundation slabs, walls and hollow bridges.

A preparation method of composite toughened glass comprises the following steps of: melting, clarifying and homogenizing all component raw materials of set glass to obtain molten glass without defectssuch as bubbles, stripes and the like; cooling the defect-free molten glass to a proper temperature, then adding a nanoscale ZrO2 crystal, and continuously stirring to obtain uniformly mixed molten glass; carrying out molding and annealing treatment on the uniformly mixed molten glass to obtain nanoscale ZrO2 crystal reinforced glass; carrying out efficient ion exchange chemical strengthening onthe reinforced glass to obtain composite toughened glass which is high in surface pressure stress, large in ion exchange layer depth and capable of meeting cover plate protection. The composite toughened glass provided by the invention has effectively-improved strength and toughness and improved mechanical properties, and can be widely applied to the fields of cover plates of electronic equipment,household appliances, display devices and the like.

The invention discloses high-performance activated carbon paper. The high-performance activated carbon paper comprises activated carbon, plant celluloses, polyester fiber pulp, PE/PET composite chopped fibers and sizing agents. The high-performance activated carbon paper is obtained by the steps of preparation of plant cellulose pulp, preparation of the polyester fiber pulp, and preparing, dryingand forming of activated carbon pulp. The high-performance activated carbon paper, as a functional filter material, has an adsorption function of the activated carbon and functions of intercepting andfiltering out suspended particulate matters and filtering out residues; the iodine value of the filter material reaches 550-800mg/g, and benzene adsorption rate can reach 18-28%; the high-performanceactivated carbon paper is widely applied to various industries such as air purification and water treatment, filtration and purification, can remove residual chlorine, TOC (total organic carbon), chemical pollutants and the like in water effectively, has good decoloration effect, and can remove substances such as formaldehyde, benzene, ammonia and TVOC (total volatile organic compounds) in the air. The filter material in the form is convenient to cut, roll, fold and clean, and environment protection and rapidness are achieved.

The invention relates to the technical field of filter paper, and discloses a preparation method of machine air filter paper. The preparation method includes the steps: soaking raw paper into trimesoyl chloride solution; soaking the raw paper into oil-phase solution; soaking the raw paper into 1, 2, 6-hexanetriol water-phase solution; performing interfacial polymerization reaction on the raw paperin the water-phase solution to generate polyurethane polymer resin; covering the surface of the raw paper with a polyurethane resin protection layer. The resin protection layer is connected with theraw paper through the bonding action force of a chemical bond, the resin protection layer and the raw paper cannot be easily separated under the influence of outside conditions, so that the raw paperis protected for a long time, and the service life of the machine air filter paper is prolonged.

The invention discloses a preparation method of acrylate polymer/montmorillonite composite particles for toughening makrolon. The preparation method comprises the steps that emulsifier dosage at a seed stage and a polymeric monomer of an elastomer are selected, a seed emulsion polymerization technology is utilized, the elastomer at the seed stage is prepared, the growth of particle size of the elastomer and the in-situ coating of a plastic outer layer are realized, an adding mode of an initiator is regulated, then emulsified montmorillonite dispersion liquid is added into emulsion, so that montmorillonite layers are uniformly dispersed among emulsion particles, and acrylate polymer/montmorillonite composite particles are obtained by demulsification. 1.96 percent of acrylate polymer/montmorillonite composite particles are blended with makrolon, the notch impact strength of a composite material at low temperature is increased by 3 times compared with that of purified makrolon, meanwhile the tensile strength of the composite material is increased by 1 time or more compared with that of the purified markrolon, and the aims of toughening and enhancing at the same time are realized.

The invention provides a preparation method of an epoxy resin nano-grade composite material. The method is characterized in comprising the steps that: nano-particles processed through a surface treatment are added into acetone while stirring; the mixture is subjected to an ultrasonic treatment for tens of minutes; the obtained solution is uniformly mixed with epoxy resin while stirring, and solvent is removed; the mixture is heated to 130 DEG C and is subjected to a reaction for th; The obtained material is dispersed for 20min in a high-speed homogenization dispersion machine; the obtained material is cooled, a proper amount of a curing agent is added into the material, and the mixture is uniformly mixed; vacuum pumping and degassing are carried out, and the material is poured into a steel mold which is applied with a demolding agent and which is already preheated; the material is completely cured for 5h under a temperature of 130 DEG C and 5h under a temperature of 150 DEG C; and the material is cooled and demolded.

The invention discloses a preparation method of an autoclaved aerated concrete block. The preparation method comprises the following steps: S1, preparing an additive A from aluminum powder paste, sodium sulfate and sodium abietate; and preparing fly ash, bagasse, juncus roemerianus powder, lime powder, gypsum powder and the additive A into ball billets, and curing to obtain lightweight aggregate; s2,preparing fly ash, ceramic tile waste, glass waste, quicklime and gypsum powder into a mixture; s3, preparing sodium hydroxide, rosin powder, triethanolamine and sodium silicate into an additive B; and S4, preparing a brick blank from the lightweight aggregate, the mixture, cement and the additive B, and maintaining the brick blank to obtain the autoclaved aerated concrete block. The invention further discloses the autoclaved aerated concrete block which is prepared by the preparation method of the autoclaved aerated concrete block. According to the autoclaved aerated concrete block, the construction waste, the household waste and the industrial waste are reasonably utilized, waste is turned into wealth, resource waste and environmental pollution are reduced, and the autoclaved aerated concrete block which is high in compressive strength and breaking strength and light in weight is prepared.

The invention relates to the technical field of cables, in particular to a heating cable with high weather resistance. The heating cable comprises cable core wires, heat conduction insulation layers and sheaths. The heat conduction insulation layers and the sheaths are sequentially coated outside the cable core wires from the inside to the outside; the heat conduction insulation layers comprise heat conduction insulation inner layers and heat conduction insulation outer layers; the sheaths comprise 80-100 parts of chlorinated polyethylene rubber, 8-15 parts of nitrile rubber, 5-15 parts of inorganic reinforcing fillers, 1-5 parts of ceramic fibers, 1-5 parts of carbon fibers, 6-10 parts of silane coupling agents, 0.01-0.5 part of antioxidants, 0.1-1 part of ultraviolet absorbents and 0.03-0.8 part of hydrolysis-resistant agents. The heating cable has the advantages that blending modification is carried out on the chlorinated polyethylene rubber and the nitrile rubber in the sheaths, accordingly, the heating cable is temperature-resistant, flame-retardant, high-low-temperature-resistant and oil-resistant, and the structural strength of the heating cable can be improved; the heatingcable with the heat conduction insulation inner layers is impact-resistant and accordingly can be assuredly reliably used in extreme environments.