29results about How to "Novel method" patented technology

The invention provides a Mn-based metal organic framework derived Mn2O3 / Mn3O4 heterojunction material as well as a preparation method and application thereof, and belongs to the field of nano material preparation methods and electro-catalysis cross application. The preparation method comprises the following steps: S10, reacting manganese salt, a surfactant and a benzoic acid compound in a solvent to obtain a Mn-based metal organic framework material; s20, calcining the Mn-based metal organic framework material in an inert atmosphere to obtain a carbonized product; and S30, flattening the carbonized product, and calcining the flattened carbonized product in an air atmosphere to obtain the Mn-based metal organic framework derived Mn2O3 / Mn3O4 heterojunction material. The method can be applied to renewable energy sources, is simple in process, universal in preparation condition, high in yield, green and environment-friendly, stable in product morphology and excellent in catalytic activity, shows excellent activity and electrochemical performance in catalysis of lithium polysulfide conversion of a cathode of a lithium-sulfur battery, and is also suitable for medium-scale industrial production.

The invention discloses a methyl modified hydrogel electrolyte, a preparation method thereof and application of the methyl modified hydrogel electrolyte in a zinc battery, and belongs to the field of secondary batteries. The hydrogel electrolyte is composed of acrylamide, methyl cellulose and zinc sulfate. The preparation method comprises the following steps: adding methyl cellulose and acrylamide into a zinc sulfate solution, uniformly mixing, then adding a potassium persulfate initiator and a cross-linking agent N, N '-methylene bisacrylamide, finally putting into a double-layer glass plate, sealing, and carrying out thermal polymerization. The methyl cellulose has zinc affinity and can convert an acrylamide proton polymer into an aprotic polymer to weaken intermolecular hydrogen bonds, so that free hydrogen bond receptors are released to participate in cationic solvation. The solubilization and recrystallization strategy can effectively adjust the gel electrolyte environment, cut off hydrogen bonds formed by binding water donors and participate in electrolyte salt dissolution, so that the electrolyte concentration is increased, and salting-out of the electrolyte is inhibited. When the gel electrolyte is applied to the zinc battery, zinc ion migration can be accelerated, and excellent cycle performance under a low-temperature condition is realized.

A method and application of CO2 laser-induced synthesis of jujube-shaped heterostructure electrocatalysts, after mixing a sulfur source and distilled water, adding a cobalt source, sodium citrate and a tin source, stirring evenly, the sulfur source is L-cysteine, ammonium thiocyanate, thiourea or sulfur powder, the cobalt source is hexahydrated cobalt nitrate, cobalt chloride and cobalt acetylacetonate, the tin source is stannous chloride, tin tetrachloride or stannous sulfate, hydrothermally reacting in a stainless steel autoclave, washing, centrifuging, vacuum drying at room temperature, obtaining an electrocatalyst precursor; grinding the electrocatalyst precursor into powder, evenly paving, and inducing CO2 laser in an air atmosphere; cooling to room temperature, washing, drying and grinding into powder to obtain a jujube-shaped heterostructure CoS / SnO2@C electrocatalyst. Advantages: simple synthesis, short time consumption, low energy consumption, good dispersibility, excellent ORR and OER electrocatalytic performance, can be used to prepare cathode electrocatalysts for lithium oxygen batteries.

The invention discloses a radiation-proof and anti-vertigo diffusion film and a preparation method thereof, and belongs to the field of materials science. The diffusion film comprises 92-98 parts of polycarbonate, 2-7 parts of modified polyacrylonitrile, and 0.3-1 parts of antioxidant by weight, and uses hydroxylamine to react with polyacrylonitrile to introduce amidoxime structure, and utilizes its ion complexing ability to complex rare earth ions, and then granulates after hot-melt extrusion with polycarbonate, and then prepares a diffusion film of a certain thickness, and the prepared diffusion film has a light transmittance of up to 78%, a haze of up to 78.1, and a radiation-proof M value of up to 0.143279. The diffusion film has the characteristics of novel structure, simple preparation, and good radiation-proof and anti-vertigo effect.

The invention discloses a Fe / Fe3O4 nano material loaded with ionic liquid, a preparation method of the Fe / Fe3O4 nano material and application of the Fe / Fe3O4 nano material in electro-catalytic nitrogen reduction. The preparation method comprises the following steps: dissolving FeSO4. 6H2O in oxygen-free water, fully stirring, adding a NaBH4 solution to obtain a black solid, carrying out centrifugal washing, and carrying out vacuum drying at 60 DEG C for 24 hours to obtain Fe / Fe3O4; dissolving the dried Fe / Fe3O4 in isopropanol, adding IL, carrying out ultrasonic treatment at room temperature for 2 hours, and then carrying out rotary evaporation at 60 DEG C to obtain an iron-based material (Fe / Fe3O4-IL) rich in ionic liquid; fe / Fe3O4-IL is taken, the surface of hydrophobic carbon cloth is coated with the Fe / Fe3O4-IL, the hydrophobic carbon cloth is placed at the room temperature for 30 min, the material is fully combined with the surface of the hydrophobic carbon cloth, and the Fe / Fe3O4-IL modified electrode is prepared. The Fe / Fe3O4-IL modified electrode disclosed by the invention is simple to prepare, shows relatively good activity on electro-catalytic nitrogen reduction, and has relatively high ammonia production rate and Faraday rate.

The present invention provides a photosensitive polyimide precursor material with dual functions, a preparation method thereof and an application thereof in photolithography. The photosensitive polyimide precursor material with dual functions of the present invention is obtained by polymerizing a diamine and a dianhydride to obtain a precursor PAA polymer, and then esterifying the precursor with a compound having a hydrophobic and cross-linkable group. The polyimide material of the present invention can be used for positive photoresist and negative photoresist, and the polyimide material can be mixed with different photosensitizers, additives, etc. for coating, development and exposure to obtain a patterned polyimide film with good resolution.

This invention discloses a method for synthesizing phosphine oxide derivatives based on [2.2] p-cycloaranes. Using thionium salts and disubstituted phosphine oxides as starting materials, Ni(COD)₂ as a catalyst, CuBr as a co-catalyst, PPh₃ as a ligand, and K₃PO₄ as a base, the reaction yields phosphine oxide derivatives. This method is novel, uses readily available raw materials, is simple to operate, has simple and mild reaction conditions, and has broad substrate applicability.

The invention provides a man-machine interaction system for style learning and style migration of a painter, which is based on tablet computer painting and comprises a mode selection module for selecting a painting mode of copying, sketching or free creation; the teaching guidance module is used for carrying out interactive guidance in the drawing process of the facsimile mode; and the style migration module carries out style migration and contrast display on the paintings completed in the copying mode and the sketching mode, so that the overall style of the scattered lines or color blocks drawn by the user is unified, and the paintings of the user are beautified. In the drawing process, interactive detection and correction are added, the drawing fun is increased, and the drawing teaching quality is improved.

The invention relates to an ionic liquid loaded Fe2O3-CNT material and application of a preparation method of the ionic liquid loaded Fe2O3-CNT material in electrocatalytic reduction of N2. The preparation method comprises the following steps: adding FeNO3. 9H2O and a carbon nanotube into ethanol, and heating; placing the sample in a porcelain boat, calcining, cooling to room temperature, and collecting the sample for later use; the preparation method comprises the following steps: adding Fe2O3-CNT and an ionic liquid IL into isopropanol, stirring at room temperature, and rotating an evaporator to remove a solvent, so as to obtain a black solid Fe2O3-CNT-IL; and taking Fe2O3-CNT-IL, coating the surface of hydrophobic carbon cloth with the Fe2O3-CNT-IL, and standing at room temperature for 10 minutes, so that the material is fully combined with the surface of the hydrophobic carbon cloth to obtain the Fe2O3-CNT-IL modified electrode. The Fe2O3-CNT-IL modified electrode is simple to prepare, shows excellent activity on electro-catalytic nitrogen reduction, and has high ammonia production rate and Faraday rate.

The present invention belongs to the technical field of chemical synthesis, and specifically discloses a class of quaternary carbon indandione tetrahydroquinoline spiro alkaloids and their preparation methods and applications in the preparation of antitumor drugs. 1-(phenylsulfonyl)-4-vinyl-1,4-dihydro-2H-benzo[d][1,3]oxazine-2-one and 1,3-indanedione are used as raw materials, Pd2(dba)3·CHCl3 is used as a catalyst, (R)-4-(tert-butyl)-2-(2-(diphenylphosphine)phenyl)-4,5-dihydrooxazole or BINAP is used as a ligand, under nitrogen protection, in a reaction solvent, react at room temperature for 2 to 36 hours to obtain a target compound. The method of the present invention is simple to operate and has a high yield. The compound of the present invention has significant inhibitory activity on the proliferation of tumor cells A549, HELA, and MDA-MB-231, and can be used to prepare drugs for the prevention and treatment of tumor diseases.

The present invention relates to the technical field of medical accelerators, and discloses a medical accelerator, comprising an accelerating tube, a beam pipe, a beam scraper, a bellows and a beam needle, wherein the beam pipe, the beam scraper, the bellows and the beam needle are connected in sequence, and the four share a central axis and are connected to form a straight line channel for electron beams to be transmitted in the straight line channel; the inner aperture of the beam scraper is smaller than the inner aperture of the beam pipe. A dose monitoring system is also disclosed, comprising a resistor, a voltmeter, a wire and a data processing system, wherein the beam scraper, the resistor and the ground are connected in sequence through a wire, and the voltmeter is used to test the voltage value at both ends of the resistor; the data processing system processes the voltage value to obtain the dose of the electron beam. A dose monitoring method is also disclosed. The present invention generates a current through a part of the electron beam, synchronously tests the voltage at both ends of the resistor, obtains the dose rate of the electron beam by testing the voltage value, does not affect the treatment process, and can realize online monitoring of the dose of the electron beam.

The present invention provides a method for preparing polyvinyl alcohol with high polymerization degree by aqueous phase precipitation polymerization, wherein polyvinyl acetate is prepared by aqueous phase precipitation polymerization, and then the prepared polyvinyl acetate is subjected to alcoholysis to obtain polyvinyl alcohol with high polymerization degree; wherein the polyvinyl acetate is prepared by aqueous phase precipitation polymerization, wherein vinyl acetate and azobisisobutyronitrile are mixed as a mixed solution, and then the mixed solution is dripped into deionized water, the reaction temperature is maintained during the dripping process, and the reaction is continued to be stirred after the dripping is completed, and the solid product is collected to obtain polyvinyl acetate with high polymerization degree. The polyvinyl acetate polymerized product of the technical solution of the present invention is directly precipitated in water, and polyvinyl acetate with high polymerization degree can be obtained without post-treatment steps such as precipitating agent or removing organic reagent, and also has a significantly higher monomer conversion rate.

The utility model relates to the technical field of vehicle lamp circuits, in particular to a rectified triode amplification vehicle lamp circuit, a vehicle lamp and a vehicle. A rectified triode amplification car lamp circuit comprises a direct current power supply; the input filtering module is connected with the output end of the direct-current power supply; the inversion rectification module comprises an inverter and a rectification unit, the input end of the inverter is connected with a direct current power supply, and the rectification unit rectifies alternating current output by the inverter into direct current; the power supply input end of the triode amplification circuit module is connected with the output ends of the input filtering module and the inversion rectification module respectively; and the LED lamp panel module is connected with the output end of the triode amplification circuit module and is driven by the amplified electric signal to emit light. According to the circuit, after alternating current is rectified, sine-wave-like light and shade changes of the automobile lamp are achieved through the triode amplifying circuit, the circuit is simple and low in cost, and reasons are easy to find when the circuit goes wrong.

The present invention provides a method, device and equipment for reducing noise of a pulse position modulation signal based on signal suppression. The noise reduction method comprises: S1, bandpass filtering the received electromagnetic logging signal to remove out-of-band interference and noise, and obtain a signal to be processed x(n); S2, constructing a signal suppression reference signal xr(n) according to the characteristics of the wireless electromagnetic logging signal; S3, using the wireless electromagnetic logging signal and the reference signal as input, using a recursive least squares adaptive filter to suppress the signal, and outputting a filter-synthesized cancellation signal xj(n); S4, low-pass filtering the cancellation signal xj(n) to obtain a useful signal s'(n) after noise reduction. The present invention improves the signal-to-noise ratio of the processed signal on the basis of traditional filtering technology, thereby improving the reliability and practicability of the logging signal transmission. The method is novel, has a small amount of calculation, and has strong universality. It has a good development prospect in the field of electromagnetic signal detection such as oil logging.

The present invention belongs to the technical field of atmospheric pollution index analysis, and discloses an atmospheric pollutant index prediction method based on information entropy and back propagation neural network, establishes a correlation between each meteorological data and all atmospheric pollutants, and calculates the similarity between each atmospheric pollutant concentration and all meteorological factors with a time gradient, then regards the time series similarity as the degree to which the meteorological data affects the atmospheric pollutant concentration, calculates the information entropy of each meteorological data, and finally selects the meteorological data with the largest information entropy and the atmospheric pollutant to use the back propagation neural network training model, and predicts the future atmospheric pollutant concentration value. Compared with the prior art, the present invention applies the information entropy in physics to the atmospheric pollutant prediction, greatly reduces the influence of different parameters on the prediction results, reduces the complexity of the prediction algorithm, and improves the prediction accuracy.

The present invention relates to the field of photovoltaic power generation technology, and specifically to a method for investigating regional photovoltaic development potential based on drones, comprising the following steps: conducting drone aerial surveys, planning routes and deploying image control points; establishing a digital model of regional terrain; analyzing and modeling regional lighting conditions; determining a suitable scope for the construction of a photovoltaic power station in the region; and determining the potential photovoltaic resource development capacity of the region. The present invention solves the problems of single means, long cycle, and inaccuracy in investigating the potential photovoltaic development capacity in a large region, especially in a county, provincial or larger region, and achieves the goal of improving the quality and efficiency of the regional photovoltaic development potential investigation work. The drone technology is used to obtain real data of natural environment mapping with outstanding efficiency and advantages such as mobility, speed, digitization and intelligence, and improves the efficiency of the regional photovoltaic development potential investigation.

The invention discloses a preparation method of a nickel-loaded nitrogen-doped lignin derived carbon-based catalyst for CO2 electroreduction. According to the method, lignin is adopted as a carbon source, melamine is adopted as a nitrogen source, a nickel-containing compound is adopted as a metal source, and the nickel-loaded and nitrogen-doped carbon-based catalyst is prepared through a simple loading and doping technological process. When the catalyst is applied to electrocatalytic CO2 reduction, it is found that the catalyst shows excellent catalytic activity on CO2 reduction, the existence form of metal Ni in the catalyst is changed by adjusting the Ni loading amount, and then the selectivity of CO in a CO2 electrocatalytic reduction product is changed. Compared with a traditional CO2 electrocatalyst, the lignin carbon source adopted in the method is a renewable solid waste resource, and the raw material cost is low; the technological process is simple and easy to operate; meanwhile, distribution of reduction products can be regulated and controlled by regulating and controlling preparation process parameters, and more application prospects are provided for electrocatalytic CO2 reduction.

The present invention provides a method for preparing a copper-catalyzed synthesis of multifunctionalized indolizine derivatives, and relates to the field of organic synthesis. The method provided by the present invention uses 1,4-amphoteric thiopyridinium salt and a diazo compound as raw materials, and reacts to prepare a trifunctionalized indolizine compound under the action of a copper catalyst. The method for preparing trifunctionalized indolizine disclosed in the present invention is simple and easy to operate, has a wide range of application of reaction substrates, a high yield, and a novel method. In addition, the compound has a strong fluorescence emission intensity and has broad application prospects in the pharmaceutical industry, synthetic chemistry, and materials science.

A method for manufacturing a threshing concave plate for a grain harvester greatly improves the success rate and efficiency of steel wire passing through the holes on the sieve plate during the manufacturing process by changing the manufacturing process sequence of the threshing concave plate, reduces the difficulty of threading, and makes the manufacturing process easy to realize automated production. The manufacturing process itself is novel and simple and easy to implement, and can realize the problem of synchronously punching the steel wire on the porous plate during the manufacturing process of the threshing concave plate, avoid interference between the steel wire and the holes on the sieve plate, and is easy to realize automated production. The method is efficient and convenient, can effectively reduce manual errors, greatly improve threading efficiency, reduce the production cycle of the product, and reduce the labor intensity of operators, and has high production application value.

This invention discloses a method for preparing copper-based nanomaterials rich in two-dimensional defects and their application in electrocatalytic CO2 reduction. The method involves inducing two-dimensional defects in the copper-based nanomaterials through halogen (F, Cl, Br, and I) doping during electrochemical deposition, thereby obtaining copper-based nanomaterials rich in two-dimensional defects. This invention, through electrochemical deposition, effectively incorporates halogen elements into copper nanomaterials, inducing different defects and active sites, enhancing the adsorption capacity of reaction intermediates, and improving the conversion of carbon dioxide (eCO2RR) to more carbon (C) atoms. 2+ The conversion efficiency of the product can be affected, and the type and size of defects can also be changed by adjusting the type and concentration of halides in the electrolyte.

The present invention relates to the technical field of medical accelerators, and discloses a medical accelerator, comprising an accelerating tube, a beam pipe, a beam scraper, a bellows and a beam needle. The beam pipe, the beam scraper, the bellows and the beam needle are detachably connected in sequence, and the four have a common central axis and are connected to form a straight line channel for electron beams to be transmitted in the straight line channel; the inner aperture of the beam scraper is smaller than the inner aperture of the beam pipe. A dose monitoring method is also disclosed, which establishes a relevant numerical relationship by simultaneously testing the X-rays generated by the first electron beam and the dose of the second electron beam before treatment, and monitors the dose of the second electron beam by testing the dose of the X-rays during treatment. The present invention generates X-rays by colliding the first electron beam with the beam scraper, and synchronously tests the X-rays to obtain the dose rate of the second electron beam at the outlet end of the beam needle, which does not affect the treatment process and can achieve online dose monitoring.

The invention discloses a method for synthesizing menthol amine compounds and their application in cigarettes. In an air environment, menthol and bromoacetyl bromide are placed in a reaction container, a first additive is added, a first step reaction is carried out in a first solvent, and then an amine derivative and a second additive are added, and a reaction is carried out in a second reaction solvent to prepare menthol amine compounds, wherein the reaction formula is: The menthol amine compound prepared by the invention is a common biologically active molecular structure and has a wide range of biological properties, including antibacterial, anti-inflammatory and antiviral activities. In particular, the menthol amine compound prepared by the invention has a more penetration-promoting effect, promotes the transdermal penetration of drugs, and is non-irritating and non-toxic to the skin.

The invention discloses a method for testing compaction deformation of a gangue filling material based on dyeing calibration, which specifically comprises the following steps of: 1, crushing gangue, and dyeing gangue particles in different particle size ranges by adopting different colors; 2, the dyed gangue particles are evenly mixed to serve as a gangue carrier, and then the gangue carrier is put into a detachable steel cylinder; 3, opening a semicircular cavity of the detachable steel cylinder, and collecting image information of the middle section of the gangue carrier; 4, tightly connecting the two semicircular cavities of the detachable steel cylinder, and carrying out a compression test on the gangue particles in the detachable steel cylinder; 5, after the compression test is completed, opening a semicircular cavity, and obtaining image information of the middle section of the compressed gangue carrier; and 6, processing and analyzing the images before and after the compression test to obtain the compression and crushing characteristics of the gangue carrier. The method can quantitatively analyze the development and distribution result of the fracture at the internal section of the gangue carrier.

This invention relates to the field of organic chemistry, and more particularly to 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride, its preparation method, and its applications. The preparation method includes: styrene and butenedioic acid diester undergoing an addition reaction under the action of a polymerization inhibitor to obtain an addition product; the addition product is then subjected to a hydrolysis reaction and a dehydration reaction sequentially to obtain 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride. The preparation method of this invention features a simple synthetic route, high reaction selectivity, high product yield, and suitability for industrial production.

The application discloses a kind of field crop green area index calculation methods based on voxel size optimization, and the method steps are as follows: obtain field crop point cloud by laser radar;Obtain crop green component point cloud using intensity information difference;Crop green component point cloud is voxelized, and three-dimensional voxel model is obtained;Crop green area index is obtained by applying voxel size optimization algorithm.The crop green area index calculated by the method of the application is compared with the green area index measured in the field, the feasibility and accuracy of the algorithm are verified, and it is shown that the method of the application realizes the rapid, accurate and non-destructive extraction of the green area index of field crops, and has high universality, which provides a theoretical basis and technical support for the extraction of the green area index of field crops.

The present invention discloses a method for aerial image target detection based on cross-level feature distillation, including: extracting a pre-trained teacher network mask map and a student network mask map, constructing a query module based on the pre-trained teacher network mask map and the student network mask map, performing cross-level feature distillation on targets of different scales based on the query module, using the multi-layer feature information of the pre-trained teacher network to guide the single-layer feature information of the student network, and enhancing the semantic information matching degree between the pre-trained teacher network and the student network. The present invention proposes a strategy of cross-level feature distillation based on the query module, which allows the student network to better learn the knowledge from the pre-trained teacher network by making a loss on the corresponding scale through the query module, and at the same time, can improve the detection performance of the student network without increasing the number of network parameters, and has certain advantages in the deployment of satellite platforms.

The invention discloses a regional automatic calibration method for roughness of a planar two-dimensional unstructured grid water-sediment mathematical model, which is characterized in that a group of cross section data is used, and each cross section is defined by coordinates of two points and used for calibrating spatial reference of the model; the position of each node relative to the cross sections in the model is calculated, the nodes are classified into different areas, and the classification of the nodes is obtained through calculation based on the cross product of node coordinates and cross section coordinates and used for judging the spatial positions of the nodes relative to the cross sections. The method provided by the invention is novel, efficient and easy to implement, is used for automatically calibrating the roughness of the planar two-dimensional unstructured grid water-sediment mathematical model, and can remarkably improve the accuracy and applicability of the model.

The invention relates to a preparation method of anthriscus sylvestris lactone nanoparticles, which comprises the following steps: chopping dry roots of anthriscus sylvestris, extracting at room temperature to obtain an extract, suspending, and distributing by using petroleum ether, ethyl acetate and n-butyl alcohol respectively to obtain corresponding components; separating ethyl acetate components by silica gel column chromatography (CC), carrying out gradient elution, detecting and combining the components to respectively obtain subfractions, purifying the subfractions, eluting, and collecting fractions with retention time to obtain anthricin; preparing anthricin into a solution, and diluting; and dispersing, carrying out ultrasonic emulsification, stirring, centrifuging, removing unencapsulated medicines and impurities, and drying to obtain the anthricin nanoparticles. The method is novel and unique, anthriscus sylvestris lactone is effectively prepared from anthriscus sylvestris, the attenuated anthriscus sylvestris lactone nanoparticles are prepared through modification, and the attenuated anthriscus sylvestris lactone nanoparticles have an intervention effect on pulmonary arterial hypertension and can be used for preparing the medicine for treating pulmonary arterial hypertension, so that the medicinal value of anthriscus sylvestris and a new way for preparing the medicine for treating pulmonary arterial hypertension are developed, and the application prospect is wide. The medicine is an innovation of medicines for treating pulmonary arterial hypertension.