1057results about How to "Reduce erosion" patented technology

The invention discloses a guidance planning method for ecological restoration of a side slope, and relates to the technical field of ecological restoration, and the main scheme is as follows: collecting multiple data of the side slope; calculating a slope stability index, and presetting a threshold value to judge whether the slope area is in a risk state; calculating a vegetation coverage area, and further calculating a plant suitability index; calculating a plant variety selection index, and further calculating a planting quantity; calculating the water and soil loss rate after restoration; calculating a plant adaptation comprehensive index; calculating an ecological restoration effect index and a vegetation density, and further obtaining a planting layout rationality index; calculating a soil stability index, further calculating a water and soil loss control index, and judging whether the soil loss control state is abnormal or not according to a preset threshold value; calculating a water and soil conservation effect index, further obtaining a vegetation growth comprehensive index, presetting a threshold value to judge the vegetation growth condition, and taking corresponding remediation measures; the method can effectively guarantee scientificity and effectiveness of ecological restoration of the side slope.

The invention, which relates to the technical field of offshore wave simulation, discloses a wave hydrodynamic numerical simulation method for a sea area with a breakwater, comprising the following steps: S1, determining a target sea area, and collecting sea chart data and water depth topographic data of the target sea area; s2, determining a shoreline position of the target sea area, and establishing a water depth terrain database of the target sea area; s3, setting grid precision, and constructing a wave hydrodynamic two-dimensional model of the target sea area; s4, setting boundary conditions for driving the wave hydrodynamic two-dimensional model, and setting initial parameters; and S5, based on the wave hydrodynamic two-dimensional model constructed in the S3, performing numerical simulation on the target sea area by using a sub-grid method to obtain the characteristic wave height and periodic data of the target sea area. According to the method provided by the invention, the calculation efficiency can be ensured, the wave transmission characteristics of the open type oyster reef are considered, and the influence of open type oyster reef construction on the wave hydrodynamic environment field can be accurately simulated.

The invention discloses a soil fixed-depth sampling device for a constructional engineering specialty. The soil fixed-depth sampling device comprises a cart, a lifting mechanism is arranged on the cart, an electric rotating rod is arranged on the lifting mechanism, a mounting plate is connected to the electric rotating rod, a sampling pipe is rotationally connected to the mounting plate through a hollow rotating rod, and a stripping mechanism is arranged between the sampling pipe and the mounting plate. The vibration rod is mounted on the sampling pipe, the groove is formed in the inner wall of the sampling pipe, and the sealing strip is arranged to seal the groove, so that soil is prevented from entering the groove and the sealing strip is prevented from moving to be separated from a soil sample when the sampling pipe drills and samples, a gap is filled between the soil sample and the periphery of the inner wall of the sampling pipe, and subsequent soil taking operation is facilitated; the semi-circular striking block strikes the vibrating rod to generate vibration, the vibrating rod transmits the generated vibration to the inner wall of the sampling pipe, and a soil sample is stripped outwards under the assistance of the vibration and the gap, so that the difficulty of taking out the soil is reduced, and the effect of conveniently taking out the soil sample is achieved.

The invention discloses a fingerprint-resistant coating of a chromium-plated part and a preparation method of the fingerprint-resistant coating, and belongs to the technical field of metal material plating surface treatment. Comprising the following steps: carrying out hydrolysis reaction on an organic siloxane coupling agent to obtain silane coupling agent hydrolysate; mixing and reacting the silane coupling agent hydrolysate, levodopa, an EDC hydrochloride reagent and a DMAP reagent to obtain modified levodopa; soaking the pretreated chromium-plated part in modified levodopa, taking out the pretreated chromium-plated part, soaking the pretreated chromium-plated part in a methacrylate solution, and polymerizing to obtain a polymethacrylate-poly-levodopa-chromium-plated part; and the polymethacrylate-poly-levodopa-chromium-plated part is soaked in a silver salt solution, and the fingerprint-resistant coating of the chromium-plated part is obtained. According to the method, the poly-levodopa adhesion layer is constructed on the surface of the chromium-plated part according to the molecular bionics principle, then the poly-levodopa is further polymerized to generate the polymethacrylate protection layer, and finally the fingerprint resistance of the chromium-plated part is improved through further coordination crosslinking of the silver salt solution.

The utility model discloses a combined dewatering and drainage system suitable for treating stagnant water on the upper layer of a strip mine side slope. An inclined drainage hole (1), a vertical drainage hole (2) and a drainage ditch (3) are combined to form the combined dewatering and drainage system. Sleeves are arranged in the inclined drainage hole (1) and the vertical drainage hole (2) within the depth of a fissure zone, a hard permeable pipe penetrates through the sleeves and extends into the inclined drainage hole (1) and the vertical drainage hole (2), and a water stop plug is arranged in an annular gap between the hard permeable pipe and the wall of the inclined drainage hole (1) and the wall of the vertical drainage hole (2). And a plurality of water permeable holes are formed in the hard water permeable pipe below the water stop plug in the vertical drainage hole (2) and the hard water permeable pipe within the water stop plug in the inclined drainage hole (1). The water pressure near the water-resisting layer is reduced through the continuous gravity drainage effect, the rainfall cost is reduced, the erosion influence of water flow on slope cracks is avoided, and the overall stability of the strip mine slope is improved.

The invention discloses an ablation-resistant long-fiber reinforced nylon material for a battery pack, and relates to the technical field of nylon materials, the ablation-resistant long-fiber reinforced nylon material comprises the following raw material components by weight: 60-80 parts of nylon resin powder, 30-50 parts of a long-fiber reinforced material, 10-18 parts of aluminum diethylhypophosphite master batch, 8-15 parts of bromine-antimony composite master batch, 3-7 parts of montmorillonite, 12-20 parts of aluminum hydroxide, and 2-6 parts of nano-silica. The composite material is prepared from the following components in parts by weight: 1-4 parts of carbon nanotubes, 0.5-1.2 parts of an antioxidant I, 0.3-0.8 part of a lubricant I, 2-5 parts of a compatilizer, 0.1-0.4 part of a nucleating agent and 0.2-0.6 part of an anti-ultraviolet agent. By adding the diethyl aluminum hypophosphite master batch, the flame retardant property of the nylon material is improved, the processability of the nylon material is improved, the ablation resistance of the nylon material is improved, and the problems of insufficient flame retardant property, poor processability and poor ablation resistance of the nylon material can be solved.

The invention discloses an arylamine compound, a composition containing the arylamine compound and an organic light-emitting device. The structure of the arylamine compound is as shown in the following formula (1): # imgabs0 # formula (1). Wherein ring A is selected from substituted or unsubstituted phenanthrene ring; b is selected from structural substituents as shown in the following formula (2); # imgabs 1 # formula (2). And ring C is selected from a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring and a substituted or unsubstituted phenanthrene ring. The arylamine compound provided by the invention has a series of excellent physical and chemical characteristics, and has a good application prospect in the photoelectric field. Specifically, the arylamine compound has excellent photoelectric stability, can effectively resist performance degradation caused by illumination and current change, and ensures stable output of the device in long-time operation. The light-emitting diode has the advantages of low sublimation temperature, low driving voltage, high light-emitting efficiency and long device service life.

The invention provides a comprehensive desertification prevention and control system for an arid region, and relates to the technical field of environmental governance, the comprehensive desertification prevention and control system comprises a sand blocking unit, a straw grid unit, a vegetation unit and a biological crust layer unit, and the sand blocking unit is arranged on the same side of the vegetation unit, the straw grid unit and the biological crust layer unit and located in the windward direction; the straw grid units are arranged around the vegetation units, the biological crust layer units are arranged in an area defined by the straw grid units and cover the earth surface, and the biological crust layer units are arranged around the vegetation units. The desertification prevention and control effect is improved by selecting shrub types with high hydraulic safety and low growth rate and combining physical and biological skinning technologies.

The invention relates to the technical field of cutting equipment, in particular to large-size diaphragm high-precision cutting equipment which comprises cutting equipment for diaphragms, the cutting equipment is composed of a storage cover, a support, a mounting frame, a hydraulic telescopic rod and a cutting knife, and a cleaning structure for cleaning the cutting knife is arranged in the storage cover; the cleaning structure comprises a mounting plate, a scraping plate, a first guide rod and a first spring; a linkage structure is arranged in the storage cover and comprises a rack, a gear, a two-way lead screw and a sliding seat, and the upper end and the lower end of the rack are fixedly connected with the hydraulic telescopic rod and the cutting knife correspondingly; a liquid conveying mechanism connected with the scraping plate is installed on the upper surface of the storage cover and comprises a pump shell, a piston, an ejector rod, a check valve, a valve plate and a communicating structure. Lifting adjustment, cleaning and cooling lubrication of the cutting knife are integrated, the automatic and intelligent cutting process is achieved, all the components are tightly matched, the structure is compact, and the production efficiency is improved.

The invention relates to the technical field of photovoltaic grid-connected cabinets, and discloses a dehumidification and dust removal photovoltaic grid-connected cabinet for an outdoor environment, which comprises a dehumidification and dust removal photovoltaic grid-connected cabinet body, the bottom of which is provided with an installation part. The mounting component comprises supporting legs arranged on the bottom surface of the dehumidification and dust removal photovoltaic grid-connected cabinet body, a base arranged at the bottoms of the supporting legs, sliding rails arranged on the inner wall of the base and rolling wheels arranged at the bottom ends of the supporting legs, the sliding rails are arc-shaped guide rails, the rolling wheels slide in the sliding rails, the number of the supporting legs is multiple, and the supporting legs are arranged on the bottom surface of the dehumidification and dust removal photovoltaic grid-connected cabinet body. The number of the rollers corresponds to that of the supporting legs; the mounting component further comprises control assemblies arranged on the supporting legs, and the rollers can be controlled to be prevented from rotating through the control assemblies. The installation part further comprises a fixing assembly arranged at the bottom of the dehumidification and dust removal photovoltaic grid-connected cabinet body, and the dehumidification and dust removal photovoltaic grid-connected cabinet body can be fixed to the ground through the fixing assembly. According to the dehumidifying and dedusting photovoltaic grid-connected cabinet for the outdoor open-air environment, the problem of foundation adjustment when an existing photovoltaic grid-connected cabinet is installed on the inclined ground is effectively solved, the construction process is simplified, the environmental influence is reduced, and the installation efficiency and safety are improved.

The invention relates to a weather-resistant anti-aging polyethylene pipeline and a preparation method thereof, and belongs to the technical field of high polymer materials. The pipeline is prepared from high-density polyethylene resin, linear low-density polyethylene resin, polyimide resin micro powder, nano silicon dioxide, nano hexagonal boron nitride, polybenzimidazole fibers, carnosic acid, zinc glycyrrhetinate, an antioxidant 1010, a hindered amine light stabilizer and a polydimethylsiloxane titanate cross-linked polymer. The preparation method comprises the following steps: taking 1, 3-methacryloxypropyltriethoxysilane as a raw material; according to the preparation method, polyimide resin micro powder, carnosic acid and zinc glycyrrhetinate are uniformly mixed and then are modified at 300-350 DEG C for 30-60 minutes to obtain a modified substance, so that the weather resistance and the aging resistance of the pipeline can be better improved. All the components are compatible with one another, and a special modification preparation method is adopted, so that the synergistic effect of the components is better exerted, and the weather resistance and the aging resistance of the polyethylene pipeline are greatly improved.

The invention provides a refining method for increasing nitrogen in the vacuum process of a VD vacuum furnace, and relates to the technical field of ferrous metallurgy, the refining method comprises the following steps: S1, refining molten steel in an LF steel ladle by adopting nitrogen as bottom blowing gas; and S2, the molten steel obtained after LF ladle refining is placed in a VD vacuum furnace, nitrogen serves as bottom blowing gas, the nitrogen flow and the vacuum degree are adjusted in a multi-stage mode, and the nitrogen increasing operation is completed. A multi-stage adjustment mode is adopted, and the nitrogen content in the molten steel is controlled by controlling the nitrogen flow, the vacuum degree and the retention time.

The invention belongs to the technical field of battery materials, and particularly relates to an MXene material composite nickel-iron-manganese-based positive electrode material and a preparation method and application thereof. The chemical formula of the MXene material composite nickel-iron-manganese-based positive electrode material is NaNiaFebMncTMdO2 (at) MXene, TM is one or more of Mg, Al, Ti, Zn, Zr, Cu, Nb, W and Mo, values of a, b, c and d depend on charge balance, M in MXene is one or more of Ti, Nb, V, Mo, Ta, Cr and Hf, X is C or N, and ene represents a structural unit of graphene. MXene is compounded with the nickel-iron-manganese-based positive electrode material, so that the situation that the nickel-iron-manganese-based positive electrode material is in contact with water and CO2 in air to inhibit the interface side reaction between electrolyte and the nickel-iron-manganese-based material can be reduced, and excellent cycling stability is shown under high voltage.

According to the method, bacillus licheniformis bacterial liquid and calcium ion liquid are sequentially, slowly and evenly sprayed on the surface of a soil body, soil particles on the surface of a slope are cemented, a layer of calcium carbonate protection film is formed on the surface of the soil body, the anti-scouring capacity of the soil body can be effectively improved, flowing of the soil particles is reduced, and plant growth is protected; the adopted bacillus licheniformis can also increase the number of effective microbial communities in soil, improve the root system environment, promote plant growth, inhibit reproduction of harmful microorganisms, improve the granular structure of the soil, improve the soil, regulate the pH value of the soil, improve the water storage, energy storage and heat preservation of the soil, improve the disease resistance of crops and promote the maturity of plants; after vegetation grows, the effect of water and soil conservation can be improved, generated calcium carbonate can also bond soil particles, water and soil loss is reduced, bacillus licheniformis plays a dual role, multiple utilization of resources is achieved, and wide application prospects are achieved.

The invention relates to the field of investment casting of nickel-based single-crystal high-temperature alloy blades, in particular to a method for preparing an yttrium oxide coating through ultrasonic impregnation of a modified ceramic core. And the silane coupling agent is utilized to modify the surface of the silicon-based ceramic core, so that the adhesive force of the coating is improved, and the risk of coating stripping is reduced. In the preparation process of the coating, the permeability of the liquid coating can be improved by utilizing ultrasonic impregnation, a coating solution is promoted to permeate into tiny pores of the silicon-based ceramic core, and the adhesive force of the coating is further enhanced, so that a uniform and firm protective coating is formed on the surface of the silicon-based ceramic core. The scheme is green and environment-friendly, is simple and easy to operate, is suitable for various different types of coatings including materials such as metals, oxides and polymers, and has wide applicability.

The invention discloses a ternary sand-fixing water-retaining seepage-proofing fertility-increasing vegetation restoration and reconstruction method, and relates to the technical field of operation methods of sand ecological restoration, and the method comprises the following steps: S1, laying a layer of seepage-proofing material on the surface layer of a target planting area to reduce water seepage and enhance soil water-retaining capacity; s2, mixing a water-retaining agent with local sandy soil to form a water storage layer, and paving the water storage layer on the surface of the impermeable material to ensure that the plant root system can obtain water for a long time; s3, applying an organic fertility intensifier to the water storage layer to improve the organic matter content and nutrient supply capacity of the soil; s4, appropriate plants are selected for planting, after planting, the vegetation growth condition and the soil humidity are checked regularly, a water-retaining agent and an organic fertility increasing agent are supplemented in time according to needs, and it is ensured that the vegetation can grow healthily. The planting method provided by the invention has a remarkable yield increasing effect, the survival rate of plants can be effectively improved, and the effect of fixing sand for a long time is achieved.

The invention provides salt-spray-resistant steel, a preparation method and application of the salt-spray-resistant steel. The salt-spray-resistant steel sequentially comprises an alloy matrix, a permeable layer and an anti-corrosion coating from inside to outside. The alloy matrix comprises an Fe element; the permeable layer comprises Fe, N and O elements; the anticorrosive coating covers at least the surface of the permeable layer. The steel has the characteristics of high strength and salt spray resistance, the binding force of the coating and a matrix is good, the thickness of the anti-corrosion coating is greatly reduced under the condition that the anti-corrosion requirement of the CX grade is met, the machinable performance of a workpiece is effectively improved, and the adverse effects that the workpiece meshing force is poor, and the surface is not uniform due to the thick coating are avoided.

The invention provides a preparation method and application of modified'sea urchin type 'manganous-manganic oxide, ammonia water is used as a main precipitator, manganese sulfate, the precipitator and a complexing agent are added into an alkaline base solution, filtering, washing and drying are performed after reaction to obtain'sea urchin type' manganous-manganic oxide, and the modified'sea urchin type 'manganous-manganic oxide is obtained by modifying the surfaces of particles on the basis. Al, Mg, Ti, Zn and other elements are introduced through liquid phase doping, a wrapping layer is formed on the surface of the sea urchin type manganous-manganic oxide, and the electrochemical performance and stability of the lithium manganate material can be further improved. The invention provides modified sea urchin-type manganous-manganic oxide with primary crystal grains larger than 300 nm, and the manganous-manganic oxide can effectively reduce the erosion effect of electrolyte by means of high-crystallinity and large-size conical crystal grains.

The invention discloses concrete with high salt corrosion resistance and a preparation method of the concrete. The concrete is prepared from 300-400 kg / m < 3 > of cement, 50-150 kg / m < 3 > of slag powder, 1000-1200 kg / m < 3 > of gravel, 650-800 kg / m < 3 > of machine-made sand, 0.5-2 kg / m < 3 > of a modified polycarboxylic acid water reducing agent, 0.005-0.01 kg / m < 3 > of an air entraining agent, 0.05-0.1 kg / m < 3 > of an ion chelating agent, 0.05-0.1 kg / m < 3 > of polyacrylamide, 0.01-0.05 kg / m < 3 > of sodium methyl silicate, 0.1-0.5 kg / m < 3 > of multiwalled carbon nanotube dispersion liquid and 140-160 kg / m < 3 > of water. The preparation method comprises the following steps: stirring and mixing the modified polycarboxylate superplasticizer, the air entraining agent, the ion chelating agent, the polyacrylamide, the sodium methyl silicate and part of the water for mixing to obtain an admixture mixed solution; sequentially putting broken stones, cement, machine-made sand, the admixture mixed solution, the multi-walled carbon nanotube dispersion liquid and the rest of mixing water into a stirrer, and stirring for 2-3 minutes, so as to obtain the concrete with high salt corrosion resistance. The concrete has high salt corrosion resistance in a complex service environment, the service life of a concrete structure is effectively prolonged, and a reliable guarantee is provided for infrastructure construction.

The present invention relates to a weather-resistant and anti-aging polyethylene pipeline and a preparation method thereof, and belongs to the technical field of polymer materials. The pipeline adopts high-density polyethylene resin, linear low-density polyethylene resin, polyimide resin powder, nano silicon dioxide, nano hexagonal boron nitride, polybenzimidazole fiber, carnosic acid, zinc glycyrrhetinate, antioxidant 1010, hindered amine light stabilizer, polydimethylsiloxane titanate cross-linked polymer, 3-methacryloxypropyl triethoxysilane as raw materials; wherein, polyimide resin powder, carnosic acid and zinc glycyrrhetinate are uniformly mixed, and then modified at 300°C to 350°C for 30min to 60min to obtain a modified product, which can better improve the weather resistance and aging resistance of the pipeline. Each component is compatible with each other, and a special modified preparation method is adopted to better play the synergistic effect of the components, and greatly improve the weather resistance and aging resistance of the polyethylene pipeline.

The invention discloses a novel efficient soil conditioner as well as a preparation method and application thereof, and belongs to the technical field of soil improvement. The problems that in the prior art, the salt reducing capacity of a soil conditioner for saline-alkali soil needs to be improved, and efficiency is low are solved. Wherein the novel efficient soil conditioner is obtained by uniformly mixing octasulphate, humic acid, montmorillonite, potassium sulfate, sugar alcohol magnesium and an additive; the preparation method of the additive comprises the following steps: adding modified polyacrylic acid and modified apatite into acetone, and reacting to obtain quaternary ammonium salt grafted apatite; the method comprises the following steps: adding bamboo powder into ionic liquid BMIMCl, adding chloroacetyl chloride, stirring and mixing to obtain an intermediate I; and mixing the intermediate I, quaternary ammonium salt grafted apatite and a catalyst in a nitrogen atmosphere, and reacting at room temperature to obtain the additive. The soil conditioner prepared by the invention can improve the soil quality, improve the soil structure, enhance the soil nutrient retention capability, promote the plant growth and increase the economic value.

The invention belongs to the technical field of chemical pumps and discloses a high-temperature-resistant, wear-resistant and anti-corrosion chemical pump which comprises a fixed base, a motor is fixedly connected to one side of the upper surface of the fixed base, a pump body is fixedly connected to the side, close to the motor, of the upper surface of the fixed base, and the output end of the motor penetrates into the pump body. A liquid inlet pipe is fixedly connected to the side, away from the motor, of the outer surface of the pump body. By arranging the blocking assembly, when the chemical pump stops, liquid can flow back, a connecting ring is pushed to move in the direction away from a liquid inlet pipe through backflow of the liquid, then a baffle ring is driven by an arc-shaped sliding block to synchronously move, the baffle ring seals a through groove, and therefore communication between a second straight pipe and a first straight pipe is disconnected, and then the liquid is prevented from continuing to flow back; the impeller in the pump body is impacted, so that the erosion of liquid to the impeller is reduced, the impeller can be normally used for a long time, and the service life of the impeller in the chemical pump is greatly shortened.

The utility model discloses a marble slab dry hanging anti-falling structure which comprises a plurality of marble slabs and a pre-assembling device, and the pre-assembling device is composed of a keel structure and two opposite pre-buried steel belts, the keel structure is formed by interweaving a plurality of vertical keels and a plurality of transverse keels, the radial section of the keel structure is in a net shape, every two adjacent transverse keels are in clearance fit, the transverse keels and the adjacent vertical keels are combined to form a grid area, and stainless steel connecting pieces are connected between each vertical keel and the transverse keels. The two ends of the vertical keels are connected with the embedded steel belts correspondingly, and the transverse keels are provided with anti-falling pieces used for being connected with the marble slabs and preventing the marble slabs from falling off and damping pieces used for being installed between the marble slabs and the transverse keels. The problem that in the prior art, a transverse keel, a vertical keel, a marble fastener and a connecting part are rusted and fractured, so that a marble slab of a marble dry-hanging outer ring falls off is solved.

The utility model relates to the technical field of water conservancy protection slope upstream faces, in particular to a water conservancy project protection slope design model which comprises a slope body, one side of the slope body is fixedly connected with a slope toe, the top of the slope toe is provided with an anti-scour assembly, the anti-scour assembly comprises a protection slope main body, the protection slope main body is fixedly connected to the top of the slope toe, and the slope toe is fixedly connected with the slope toe. A drainage groove is formed in one side of the top of the slope protection body, a water receiving groove is formed in the side, away from the drainage groove, of the top of the slope toe, and a green plant planting block is fixedly connected to an inner cavity of the water receiving groove. According to the slope protection design model for the water conservancy project, by installing the anti-scouring assembly, in the process of using the model, through cooperation of green plant planting blocks, metal grids and other components and special structural design, impact of water flow can be resisted, erosion of the water flow to a slope surface is reduced, the service life of a protection slope is prolonged, and safe operation of water conservancy facilities is guaranteed; green plants are planted on the surface, rainwater can be effectively absorbed, water and soil loss is reduced, and soil stability is improved.

The invention discloses a wave hydrodynamic numerical simulation method for a sea area provided with a hedge shrub dam, and relates to the technical field of offshore wave simulation, and the method comprises the following steps: S1, determining a target sea area, and collecting actually measured water depth topographic data and chart water depth data of the target sea area, the target sea area being a salt marsh beach sea area where the hedge shrub dam is planned to be arranged; s2, setting grid precision, and constructing a wave hydrodynamic two-dimensional model of the target sea area by using a structured grid; s3, setting boundary conditions for driving the wave hydrodynamic two-dimensional model, and setting initial parameters; and S4, based on the wave hydrodynamic two-dimensional model constructed in the S2, performing numerical simulation on the target sea area by using a sub-grid method to obtain the characteristic wave height and periodic space-time distribution of the target sea area. According to the method, the calculation efficiency can be guaranteed, the wave transmission characteristics of the hedge shrub dam are considered, and the influence of construction of the hedge shrub dam on the wave hydrodynamic environment field can be accurately simulated.

The invention relates to a whole intestine flora transplantation strategy and a nanometer packaging method and application thereof. According to the method disclosed by the invention, the transplantation of the whole intestinal flora is realized by mainly utilizing the combined transplantation of the intestinal fluid flora and the fecal flora, so that the micro-ecology of the whole intestinal tract is more comprehensively, accurately and efficiently regulated and controlled, and a better flora transplantation treatment effect is achieved. The microflora (microcapsules) is encapsulated by a safe biological material, the encapsulating process is simple in process and short in time consumption, intestinal bacteria in different shapes can be simultaneously encapsulated, and the method is not only suitable for encapsulating oxygen-resistant bacteria and facultative anaerobic bacteria, but also suitable for encapsulating intestinal flora including strict anaerobic bacteria, and has the advantages of being simple in process and low in cost. According to the preparation method, death of intestinal bacteria in the preparation process can be reduced, erosion of gastric acid and the like to the intestinal bacteria can be resisted, the survival rate of the bacteria and the colonization efficiency of the bacteria in host intestinal tracts can be remarkably improved, and the microbial transplantation treatment effect is further enhanced.

The invention discloses an anti-rut enhanced epoxy asphalt mixture and a preparation method thereof, belongs to the technical field of asphalt mixture processing, and is used for solving the technical problem that the anti-rut performance, the water stability and the low temperature resistance of an asphalt mixture in the prior art need to be further improved. The modified asphalt is prepared from the following components in parts by weight: 16 to 20 parts of matrix asphalt, 0.8 to 1 part of additive, 4 to 6 parts of reinforced elastomer, 3 to 5 parts of epoxy modified polysiloxane, 4 to 5 parts of modified reinforced fiber and 65 to 75 parts of aggregate, according to the invention, the asphalt mixture composed of the matrix asphalt and the aggregate is reinforced by the reinforced elastomer, the epoxy modified polysiloxane and the modified reinforced fibers, so that the rutting resistance of the epoxy asphalt mixture is effectively improved, and the water stability and low temperature resistance of the epoxy asphalt mixture are also improved.

The present invention relates to a "plum blossom pile" type air-permeable brick for composite ladle and a preparation method thereof, wherein the air-permeable brick comprises a dispersion block, a castable, a cover plate, an air chamber, a steel shell, and a slit, wherein the dispersion blocks are evenly and spacedly arranged from the center to the outer circle, the castable is filled between the dispersion blocks, the slits are evenly distributed in the castable, the steel shell is wrapped at the outermost part of the air-permeable brick, the cover plate is at the bottom of the air-permeable brick, and an air chamber is left between the dispersion block, the castable and the cover plate. The air-permeable brick produced by the present invention has good air flow stability and uniformity, large gas ventilation volume, high-strength brick body, good anti-permeability and thermal vibration stability, and a long service life.

The invention relates to the technical field of anti-counterfeiting films, and in particular to a multi-layer composite anti-counterfeiting film and a preparation method thereof. The invention uses styrene, n-butyl acrylate, methacrylic acid and allyl methacrylate as raw materials, and adopts a semi-stepwise emulsion polymerization method to prepare a colloidal microsphere component having excellent structural stability and dispersibility. In the process of preparing a photonic crystal film with the colloidal microsphere component, perovskite quantum dots are added, and the perovskite quantum dots can be embedded in the photonic crystal film formed by the colloidal microspheres, so that the periodic structure of the photonic crystal interacts with the fluorescence characteristics of the perovskite quantum dots, thereby leading to fluorescence enhancement; secondly, the colloidal microspheres serve as a protective layer, wrapping the perovskite quantum dots inside, reducing direct contact between the quantum dots and the external environment, thereby reducing the erosion of the quantum dots by factors such as water, oxygen, light and heat, improving the stability of the quantum dots, and preventing the agglomeration of the perovskite quantum dots, which helps to maintain their optical properties.

The invention provides a self-standing steel chimney damper which comprises a chimney body, a damper body and an installation base, the chimney body is fixedly installed at the bottom of an inner cavity of the damper body, a protection mechanism is arranged on the outer side of the installation base, and through the arrangement of the protection mechanism, through cooperation of a sliding sleeve and a sliding sleeve, the chimney body is fixedly installed. By arranging the rain shielding cover, the rain shielding cover can be moved to the outside of the damper body, the damper body can be protected through the rain shielding cover, the degree that the damper body is eroded by rainwater is reduced, the service life of the damper body is prolonged, and the stability of the chimney body is further improved; through cooperation of a positioning plate, a positioning bolt, a threaded hole, a first connecting plate, a second connecting plate and a connecting bolt, when the damper body needs to be detached, the damper body can be detached by screwing the positioning bolt and the connecting bolt, mounting and detaching of the damper body are facilitated, and the practicability is high. And the damper body can be conveniently maintained or repaired when being locally damaged.