68results about How to "Theoretically reliable" patented technology

The invention belongs to the technical field of preparation, regeneration or reactivation, and discloses a biomass carbon fiber/layered double metal hydroxide adsorption material for phosphorus removal. The material is composed of biomass carbon fiber and layered double metal hydroxide, the layered double metal hydroxide grows on the surface of the biomass carbon fiber in a crescent sheet shape, and the biomass carbon fiber is prepared by using the steps of: extracting cellulose from biomass, and then performing carbonization, wherein the biomass carbon fiber has a length of 50-1500 mum and adiameter of 5-20 mum, and the layered double metal hydroxide is two-dimensional sheet-shaped copper-aluminum bimetallic hydrotalcite hydroxide which has a sheet thickness of 100 nm-1 mum and a copper-aluminum molar ratio of (2:1)-(4:1). The material has a simple and controllable preparation process, and the adsorption performance is improved through a double adsorption effect of the biomass carbonfiber/LDH, so that the purpose of efficient and rapid removal is achieved, the removal rate is up to 99.5%; therefore, reliable theory and actual support are provided for practical application.

The invention discloses a simulation method for electromagnetic scattering characteristic of a plurality of non-coaxial rotating symmetric bodies. The simulation method comprises the following steps of: building a model of each rotating symmetric body and a corresponding equivalent sphere; respectively building first and second local rectangular coordinate systems on each rotating symmetric body; determining the excitation vectors by using plane wave as an excitation source; respectively building scattering matrixes in the first local coordinate system of each rotating symmetric body; building a third local rectangular coordinate system for every two equivalent spheres and determining the transmission matrix between the two equivalent spheres; building rotating matrixes among the first, second and third local rectangular coordinate systems; building an equation set and obtaining equivalent electromagnetic flow on each equivalent sphere by using an iteration method; and determining the scattering field of a remote area, thus obtaining the radar scattering section area. The simulation method disclosed by the invention provides a quick and efficient solution for electromagnetic scattering simulation of a plurality of rotating symmetric bodies, saves spatial resources, and can accurately and quickly simulate the electromagnetic scattering characteristic of the plurality of non-coaxial rotating symmetric bodies.

The invention belongs to the technical field of composite materials and relates to a preparation method and application of a core-shell P-CoFe2O4(at)GCN photocatalyst. The preparation method comprisesthe following steps: firstly mixing cobalt salt and ferric salt, dropwise adding alkali lye and precipitating to prepare strongly magnetic nanoparticles CoFe2O4; fully dispersing a graphite-type carbonitride precursor and a phosphorus source in distilled water, carrying out solid-liquid separation, drying a solid at 80-100 DEG C for 12-24 h, and grinding to obtain a powder; and finally placing the powder into a muffle furnace, and heating in the air atmosphere at 500-600 DEG C for 2-5 h so as to obtain the photocatalyst. In the invention, the prepared material is also applied to wastewater soas to remove antibiotics. By compound modification of the graphite-type carbonitride, the photocatalytic performance is greatly improved, and the solid-liquid separation problems are solved. The preparation method is simple to operate, and the sources of the raw materials are wide. The surface of the prepared material has a pore structure, and the specific surface area is increased, thus providing more active sites for a photo-catalytic reaction. The result shows that the tetracycline photocatalytic degradation rate of the product is 3.66 times higher than the tetracycline photocatalytic degradation rate of pure graphite-type carbonitride before modification.

The embodiment of the invention provides a method and device for matching longitudinal waves with transverse waves for geophysical exploration. The method includes the steps that full wave train well logging data are utilized to determine phase and wave group characteristics of the longitudinal waves and converted transverse waves in a main interface; well control processing is respectively conducted on the longitudinal waves and the converted transverse waves; the polarity of the longitudinal waves and the polarity of the converted transverse waves are compared and phase correction is conducted; a data body including the speed ratio of the longitudinal waves to the transverse waves is acquired according to prestack data of the longitudinal waves; the data body is utilized to convert the converted transverse waves from the time domain of the converted transverse waves to the time domain of the longitudinal waves; identification layers which can stably track in whole research area are picked up and utilized to conduct fine horizon correction on the converted time domain of the converted transverse waves. The method and device are combined with seismic data processing, forward modeling, inversion and other measures, so that the method and device are reliable in theory and rigorous in process, and the longitudinal waves and the transverse waves can be well matched.

The invention discloses a method for judging whether symmetrical aspheric surfaces of a rotary shaft can be subjected to direct interference detection. The judgment basis is that when a digital wave surface interferometer is used for conducting direct interference detection on the symmetrical aspheric surfaces of the rotary shaft, whether a collected interference pattern can be completely identified by a detector of the digital wave surface interferometer, namely whether a wave aberration corresponding to an interference fringe at the position where interference fringes are densest on the interference pattern does not exceed the wave aberration corresponding to the Nyquist frequency of the detector is identified; if the collected interference pattern can be completely identified by the detector of the digital wave surface interferometer, the digital wave surface interferometer can be used for conducting direct interference detection on the symmetrical aspheric surfaces of the rotary shaft. The method overcomes the defect of inaccuracy of judging whether symmetrical aspheric surfaces of a certain rotary shaft can be subjected to direct interference detection through a certain digital wave surface interferometer according to experience. The method can be used for visually and accurately judging whether the symmetrical aspheric surfaces of the rotary shaft can be subjected to direct interference detection, and has the advantages that the theory is reliable, judgment is accurate, application range is wide, the time for making a scheme for detecting the symmetrical aspheric surfaces of the rotary shaft is saved, and working efficiency is improved.

The invention relates to a critical burial depth computing method for a groundwater recharging vegetation. The critical burial depth computing method comprises the following steps: collecting data; establishing a rule model of known soil; computing effective aperture; computing the maximum lifting height of tubular billet water; computing the critical burial depth of the groundwater recharging vegetation. Through analyzing the functional relationship between underground water and a vegetation root system, the computing method elaborates the physical process of the groundwater recharging surface vegetation and defines the critical burial depth of the groundwater recharging surface vegetation; by taking the thickness of a diving activity layer and the thickness of the vegetation root layer as the computing goal, the determined critical burial depth computing method for a groundwater recharging surface vegetation is structured, and thus the technical blank is filled. The method has clear physical process and function mechanism, and also has the technical university for the vast arid region and semi-arid region; besides, the method provides reliable theoretical and technological supports for the reasonable development and utilization of underground water resource and water containing layer of underground water.

The invention belongs to the technical field of water pollution control materials, and discloses a preparation method for a biomass charcoal/copper magnesium aluminum ternary metal hydroxide nitrogen-phosphorus-removing material. The nitrogen-phosphorus-removing material is composed of biomass charcoal and a copper magnesium aluminum ternary metal hydroxide; the biomass charcoal is formed by performing carbonization by using biomass as a raw material; and the copper magnesium aluminum ternary metal hydroxide is a nanoscale two-dimensional sheet-shaped ternary metal hydrotalcite hydroxide, thesheet-shaped thickness is 10 nm to 50 nm, and a molar ratio of copper to magnesium to aluminum is (0.5-1.5):(2.5-1.5):1. According to the preparation method for the biomass charcoal/copper magnesium aluminum ternary metal hydroxide nitrogen-phosphorus-removing material provided by the invention, the material preparation process is simple and controllable, the adsorption performance is improved through a double adsorption effect of the biomass charcoal/copper magnesium aluminum ternary metal hydroxide, and the purpose of removing nitrogen and phosphorus is achieved; and nitrogen and phosphoruswastewater is removed by experimental simulation, and results show that the nitrogen removing rate reaches 75.2% and the phosphorus removing rate is up to 95.3%; and the method provides reliable theoretical and practical support for practical applications.

The invention discloses a calculation method for stability control of a gravel pile and geogrid combined composite foundation. When the gravel pile and geogrid combined composite foundation conforms to an assumed deep failure mode, the calculation of the stability control of the gravel pile and geogrid combined composite foundation is based on a rigid body limit balance principle; for reinforced soil bodies between gravel piles, a reinforced soil body under an embankment coverage area is equivalent to homogeneous soil according to an area equivalent method, the area except the embankment coverage area is still a soft soil area, and the safety coefficient of the gravel pile and geogrid combined composite foundation is calculated; if the safety coefficient meets the requirements in technicalspecifications, the minimum geogrid ultimate tensile rigidity required by the safety factor is calculated, and the determined design scheme of the gravel pile and geogrid combined composite foundation is more economical and effective. The problem of stability calculation of a traditional gravel pile and geogrid combined composite foundation is solved, and meanwhile the strength parameters of gravel piles and geogrids are reasonably determined.

The invention discloses a background suppression method based on radar image statistical characteristics, and belongs to the technical field of radar image processing. The method comprises the following steps: carrying out linear frequency modulation pulse pressure processing on a large-time wide-bandwidth linear frequency modulation continuous wave signal of a radar to form pulse pressure data; arranging the data frames of the pulse pressure data according to the corresponding azimuth angles, and splicing the data frames into a radar image; adopting an inter-frame non-coherent processing method to carry out sliding window average processing of the window length on the radar image; removing distance attenuation of the radar image; and removing direction attenuation of the radar image. According to the invention, the far and near echo energy difference of the FOD radar image caused by signal propagation attenuation can be effectively compensated, the expansibility interference signal inthe distance direction can be suppressed, and the FOD radar image with complex distribution characteristics originally is converted into a general gray scale image with uniform background fluctuation.

The invention belongs to the technical field of water pollution photocatalysts and relates to a hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst. The hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst is prepared through compounding hollow-structure biomass charcoal, TiO2 multi-wall tubes and CuO nanoparticles. The invention further discloses a preparation method of the photocatalyst; the preparation method comprises the following steps: pre-treating biomasses through washing, crushing, acid washing and the like; after dissolving the biomasses intoa titanium solution, carrying out ultrasonic treatment for 20 to 40min; drying for 4 to 8h at 40 to 60 DEG C, so as to obtain a titanium source/biomasses; putting the titanium source/biomasses into amuffle furnace and carrying out high-temperature calcination for 2 to 6h; immersing into a copper solution for 3 to 6h; after washing, immersing into a copper solution and washing; after repeating for 10 to 20 times, drying for 10h at 50 to 70 DEG C; finally, carrying out high-temperature calcination for 2 to 4h under the protection of nitrogen gas and naturally cooling to obtain the photocatalyst. The preparation method disclosed by the invention is controllable and has simple reaction conditions; the high specific surface area of the hollow biomass charcoal is combined with the photocatalysis performance of TiO2 and the catalysis performance of CuO, and ammonia nitrogen is efficiently and rapidly removed. Ammonia nitrogen wastewater is removed through experimental simulation and the highest removal rate under the irradiation of ultraviolet rays reaches 99.5 percent.

The invention provides a method for calculating tapping time of a steelmaking converter, which belongs to the field of ferrous metallurgy and comprises the following steps: determining a converter profile, a structural size, a converter tapping tilting mechanism type, working characteristics and a rotating speed range; calculating each inclination angle of the converter from tapping to ending, thevolume of molten steel and slag in the converter corresponding to each subdivided liquid level height, and the mass of the molten steel; calculating the corresponding tapping molten steel mass flow and outflow time further, and building a basic database; and in combination with a tilting operation system in the converter tapping process, calculating the tapping time. According to the invention, the influences of the irregular structural shape of the converter, the size of the tapping hole, the weight of molten steel and slag loaded in the converter, the tapping tilting angle, the tilting speed and other operation systems are fully considered. The method is reliable in theory, practical and accurate in calculation, and lays an important foundation for influence factor analysis of the tapping time of the converter, optimization of a tapping operation system, reduction of tapping temperature and other process optimization.

The invention discloses a preparation method of a petal-shaped ZnIn2S4-loaded bismuth oxide composite visible light catalytic material, which comprises the following steps: synthesizing Bi2O3 by taking Bi-MOF as a precursor, and synthesizing ZnIn2S4 by adopting a hydrothermal method; and then taking Bi2O3 and ZnIn2S4 as raw materials, and synthesizing by adopting a hydrothermal method to obtain the petal-shaped ZnIn2S4 loaded bismuth oxide composite visible light catalytic material. In addition, the invention also discloses a product prepared by the preparation method. The prepared bismuth oxide composite visible light catalytic material is of a rod-shaped structure, ZnIn2S4 of a petal-shaped structure is evenly dispersed on the surface of the rod-shaped bismuth oxide structure, the specific surface area of the material is effectively increased, more active sites are exposed, and therefore the bismuth oxide composite visible light catalytic material has the excellent hydrogen production performance, can rapidly and efficiently conduct photolysis on water to produce hydrogen, and has the wide application prospect. And reliable theoretical and practical support is provided for practical application.

The invention discloses a method for checking levelness of straightening rollers of a steel cold straightener, and belongs to the technical field of cold straightener straightening roller adjusting methods. The method is used for carrying out levelness checking on the straightening rollers of the steel cold straightener. According to the technical scheme, the roller way center line that is the rolling line and a point perpendicular to the roller way center line serve as the basis, through the distance measuring method, data are obtained, and whether the data meet the cosine law or not is usedfor judging the levelness of multiple movable points. Levelness measuring of the straightening rollers is converted into angle and straight line distance measuring, and single-point continuous changing measuring, the traditional levelness measuring method is broken through, and the new path is developed for straightening roller levelness measuring. Simple instrument equipment is adopted, the aim that a small device is used for measuring and calibrating a large machine device is achieved, in the measuring process, a measuring person can select the number of measuring points and the moving distance of the measuring points for measuring, measuring precision is controlled, and the measuring errors can be greatly reduced.

The invention discloses a testing device and a testing method for reaction of carbon dioxide and hot dry rock powder, relating to the testing technology of geological storage of carbon dioxide in deep earthcrust. The testing device is composed of a carbon dioxide gas pressurization system (10), a core reaction system (20), a cold well gas-water separating system (30) and an oil bath constant temperature system (40), wherein the core reaction system (20) comprises a pressure compensating vessel (21), a reaction kettle (22), an adsorption kettle (23), a PID (Proportion Integration Differentiation) automatic pressure control valve (24) and a gas guide pipe (25); and the cold well gas-water separating system (30) comprises a cold well (31), a secondary vacuum buffer container (32), a primary vacuum buffer container (33), a vacuum pump (34) and a common valve (35). Data measurement is simple, the parameters such as temperature and pressure are only recorded, the consumption amount of carbon dioxide in the reaction can be calculated, the testing efficiency can be effectively improved and the device and the method can provide reliable theory and testing basis for the technology of carbon dioxide geological storage.

The invention discloses a preparation method of a bismuth oxide composite visible light catalytic material loaded with CdS quantum dots, which comprises the following steps: firstly synthesizing Bi2O3 by taking Bi-MOF as a precursor; then loading cadmium sulfide quantum dots on the surface of bismuth oxide by taking Bi2O3 and cadmium acetate dihydrate as raw materials and adopting an in-situ oil bath method to synthesize the bismuth oxide composite visible light catalytic material loaded with the CdS quantum dots. In addition, the invention also discloses a product prepared by the preparation method. The prepared bismuth oxide composite visible light catalytic material is of a rod-shaped structure, the CdS quantum dots are evenly dispersed on the surface of the rod-shaped bismuth oxide structure, the specific surface area of the material is effectively increased, more active sites are exposed, and therefore the visible light catalytic performance of the material is effectively improved.

The invention belongs to the technical field of composite materials, and relates to an LDHs adsorbent, in particular to a preparation method of layered nano hollow microsphere NiSiO-coated NiAlFe adsorbent loaded with LDHs. The preparation method comprises the following steps: preparing a template SiO2; preparation of NiSiO hollow spheres, dispersing NiSiO hollow spheres, Ni(NO3)2.6 H2O, Al(NO3)3.9 H2O, Fe(NO3)3.9 H2O and urea into water to form a mixed suspension; transferring to a high-pressure kettle, carrying out a hydrothermal reaction at 120-140 DEG C for 12-16 hours, naturally cooling to room temperature, respectively washing sediments with ethanol and ultrapure water for three times, drying at 60-80 DEG C for 8-12 hours, and grinding into powder, thereby obtaining the product. Theprepared adsorbent is applied to adsorption of radionuclide. According to the method, NiAlFe-LDHs are grafted to the NiSiO hollow microspheres, and Cs<+> in water can be rapidly and efficiently removed. The experimental simulation shows that when 50 mg of the prepared adsorbent is added for reaction for 20 min, the removal rate of Cs<+> can reach 89.73%, and reliable theoretical and practical support is provided for practical application.

The invention discloses a limited soil mass soil pressure acquisition method considering the soil separation width in an adjacent underground project. The method comprises the following steps of determining foundation pit design parameters, load parameters and physical and mechanical parameters of a rock-soil mass; determining an initial slip crack surface inclination angle; acquiring the gravity acting power, the ground load acting power, the dissipated energy loss acting power and the pressure acting power of the soil body; establishing a relational expression of energy consumption balance, and obtaining a soil pressure resultant force value and a critical failure angle; and obtaining a critical depth, and obtaining a soil pressure distribution condition along the depth. According to the limited soil mass soil pressure acquisition method considering the soil separation width in the adjacent underground project, the excavation safety of foundation pits on the two sides of the soil separation in the adjacent underground project can be evaluated and predicted in advance, and a basis is provided for design of an inner support.

The invention provides a method for determining the dynamic range of an interferometer during spherical defocusing detection, and the dynamic range of the interferometer during spherical defocusing detection refers to the maximum wave aberration value or the maximum number of rings during complete sampling of a detector, and the determination of the dynamic range of the interferometer during spherical defocusing detection is the determination of the complete sampling of the detector. The complete sampling requirement of the detector is as follows: the interference pattern can be completely distinguished by the detector, and the wave aberration corresponding to one interference fringe at the densest interference fringe on the interference pattern is equal to the wave aberration corresponding to the Nyquist frequency of the detector. According to the invention, the lack of a method for determining the dynamic range of the interferometer during spherical out-of-focus measurement is made up, and the performance index of the interferometer is perfected. The method is reliable in theory, simple, accurate in judgment and wide in application range.

The invention belongs to the field of civil engineering, and particularly relates to a traffic-uninterrupted expressway tunnel pavement upheaval disease treatment method, which comprises the followingsteps of setting construction sequence lanes, setting temporary safety facilities and laying, detaching a cable trough on the side of the implementation lane, and arranging a foot locking steel pipeon the inner side of the original cable trough, excavating a road surface in a segmented groove jumping manner, arranging profile steel cross beams and channel steel longitudinal beams, casting a concrete bottom plate, a concrete leveling layer and a concrete pavement in place, and guiding and changing traffic lanes, and repeating. According to the method, a steel pipe pile and steel beam structure and concrete transverse support bottom plate combined reinforcing method is adopted, so that the upheaval disease of the pavement can be thoroughly treated under the condition that only one lane ofthe expressway is closed, and the tunnel structure and the operation safety are ensured.

The invention relates to a composite material and a preparation method thereof. The composite material comprises hollow three-dimensional phosphorylated biomass charcoal, hierarchical structure TiO2 and rGO. By combining the high specific surface area of the hollow phosphorylated biomass charcoal and rGO with the photocatalytic performance of TiO2, the composite material disclosed by the invention can be used for efficiently and quickly removing ammonia nitrogen. In addition, the preparation process of the composite material is controllable, the process conditions are simple, and the composite material is more suitable for large-scale production.

The invention belongs to the technical field of composite material preparation, relates to a photocatalytic degradation ammonia nitrogen material, and in particular relates to a hiberarchy biomass carbon fiber/TiO2 photocatalytic degradation ammonia nitrogen material which consists of a biomass carbon fiber and hiberarchy TiO2 nanowires, wherein the biomass carbon fiber is prepared by extracting cellulose and carbonizing biomass as a raw material and has the diameter of 2-10mu m; the hiberarchy TiO2 nanowires are made through seed method hydrothermal in-situ growth, have the diameter of 100-200nm and have the length of 1-5mu m. The invention further discloses a preparation method of the material, and application of the material as a photocatalyst for removing ammonia nitrogen in water. Thepreparation process is controllable, the reaction conditions are simple, and with the combination of a high specific surface area of the biomass fiber and the photocatalytic performance of TiO2, thepurpose of effectively and rapidly removing ammonia nitrogen can be achieved. Removal of ammonia nitrogen wastewater is simulated through experiments, and results show that the removal rate is as highas 97.3% under radiation of ultraviolet rays, and reliable theoretical and practical support are provided for actual application.

The invention belongs to the technical field of adsorbent synthesis, and relates to a xerogel adsorbent, in particular to a preparation method of a CA-Al-KABs xerogel adsorbent, which comprises the following steps: mixing a kaolin suspension and 1.0 mol/L sodium salt solution, stirring, cleaning the solid, drying, and grinding to obtain sodium-based kaolin Na-Kaolin; slowly dropwise adding an isopyknic 0.96 mol/L NaOH solution into the 0.4 mol/L aluminum salt solution in a water bath at 60 DEG C to obtain an Al pillared solution; dispersing the obtained Na-Kaolin in deionized water according to a mass ratio of (2-3): 100, and dropwise adding an Al pillared solution to obtain aluminum-based kaolin Al-Kaolin; adding Al-Kaolin into 20 g/L of a sodium alginate solution, stirring, carrying outultrasonic treatment, adding a 0.5 mol/L cross-linking solution, hardening, filtering, washing and drying. The kaolin is subjected to composite modification, CA-Al-KABs xerogels with different forms are prepared according to needs while the adsorption effect is kept, and the difficulty of solid-liquid separation is solved. The prepared xerogel can effectively remove antibiotics, especially ciprofloxacin and norfloxacin, in wastewater, and provides theoretical and experimental support for practical application.

The invention discloses an observation method for small-scale turbulence in cloud. The method comprises the following steps: illuminating cloud particles in a cloud cluster by using collimated and expanded laser; continuously sampling a digital hologram of moving cloud particles in a cloud cluster by using a high-speed camera, and obtaining two-dimensional complex amplitude distribution with a zr reproduction distance on a reconstruction plane in the digital hologram by using a numerical reconstruction algorithm; sequentially reconstructing different distances for the digital hologram to obtain the number, three-dimensional space distribution and particle size of all cloud particles in a sampling interval, obtaining the three-dimensional displacement of the cloud particles after continuous shooting of the high-speed camera, and obtaining the three-dimensional speed of the cloud particles in combination with the sampling time; judging the particle following property according to the particle size and turbulence frequency of the cloud particles; and according to the three-dimensional instantaneous speed of the airflow field in the cloud cluster, obtaining a turbulent flow field speed variance, turbulent flow intensity and average turbulent flow kinetic energy. The observation method for small-scale turbulence in the cloud solves the problems of low sampling frequency and single measurement parameter during observation of turbulence in cloud in the prior art.

The invention discloses a partition method for clasolite reservoir lithogenous phases. The method comprises the steps that firstly, with the combination of the magnitudes of a compaction rate Com, a cementing rate Cem and a dissolution rate Dis, the clasolite lithogenous phases Dn are divided into nine types, the total compaction rate of rock samples, the cementing rate of each cementing mineral and the dissolution rate of each dissolution mineral are calculated, and the total cementing rate and the total dissolution rate of the rock samples are obtained through calculation; then, the total compaction rate, the total cementing rate and the total dissolution rate of the rock samples are compared with the compaction rates, the cementing rates and the dissolution rates corresponding to the nine lithogenous phase types; it is determined that the lithogenous phase name of the rock samples is Ai+J-Bi+R-Ci. The method has the advantages of being easy to implement, reliable in theory and goodin quantitative feature.

The invention belongs to the technical field of visible light photocatalyst, and relates to a preparation method and application of ferroferric oxide-graphite carbon nitride composite magnetic photocatalyst. The preparation method comprises the following steps that firstly, a graphite carbon nitride precursor is heated to obtain graphite carbon nitride; secondly, choline chloride, urea and deionized water are mixed to perform a reaction for 20-40 minutes at the temperature of 35-65 DEG C so as to obtain a deep eutectic solvent; thirdly, the graphite carbon nitride, ferrous salt, inorganic alkali and the deep eutectic solvent were mixed and transferred to a reaction kettle to perform a reaction for 3-5 hours at the temperature of 100-130DEG C, then the reaction product is washed and crushedafter natural cooling. The preparation process is simple. By modifying traditional graphite carbon nitride, organic pollutants can be degraded efficiently and quickly, meanwhile the solid-liquid separation can be quickly carried out on the photocatalyst after the reaction under the condition of an external magnetic field. The wastewater containing methylene blue is removed through an experiment simulation, and the result shows that the photocatalytic degradation efficiency of methylene blue is more than 95%, which provides a reliable theoretical and practical support for practical application.