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106results about How to "Improve analytical precision" patented technology
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High surface area substrates for microarrays and methods to make same
InactiveUS7195872B2Small dimensionImprove analytical precisionSequential/parallel process reactionsFixed microstructural devicesPolymer scienceMicroscopic scale
The present invention is directed to a substrate having a plurality of microfeatures that provide a high surface area and are open to provide ready access to fluids and components therein. Methods of making the high surface area substrates are described and include generating microfeatures and / or microstructures on the surface of the substrate.
Owner:BIOMICROARRAYS +1
Coaxial rigid rotor pneumatic elastic response method
InactiveCN104317980AReduce dependenceImprove analytical precisionSpecial data processing applicationsStructural dynamicsResponse method
The invention provides a coaxial rigid rotor coupling pneumatic elastic response analysis method, and belongs to a helicopter kinetic analysis technology. The method is characterized in that according to the operation and control characteristics of a coaxial rigid rotor helicopter, a balance equation optimization solution method is built, and an optimization solution is found according to the given target and constraint conditions. According to the characteristic of complicated coaxial rigid rotor flow field environment, a rotor flow field is calculated by using a computational fluid dynamic method based on an Euler / N-S equation; and then, the coupling pneumatic elastic response is calculated by using a computational fluid dynamic / computational structural dynamic loose coupling analysis method. The coaxial rigid rotor coupling pneumatic elastic analysis method has the advantage that when the analysis method is used, balance operation and control parameters, blade response, rotor loads and the like of the coaxial rigid rotor helicopter can be calculated. The method has good analysis precision and engineering applicability; the relying of the development process on the test can be reduced; and the design period and the development cost can be greatly reduced.
Owner:CHINA HELICOPTER RES & DEV INST
Efficient multi-objective optimization method for satellite constellation
ActiveCN107798187AReduce computing costReduce design costGeometric CADDesign optimisation/simulationEarth observationIntersection of a polyhedron with a line
The invention discloses an efficient multi-objective optimization method for a satellite constellation and belongs to the field of constellation system of a spacecraft. The method comprises the stepsof determining an initial condition based on a Walker-delta constellation configuration, and establishing a constellation orbit kinetic equation, an earth coverage analysis module and an earth observation resolution model; optimizing an earth orbit height, an orbital inclination and an ascending node right ascension with a coverage percentage and a ground pixel resolution by use of a sequential radial basis function multi-objective optimization strategy; and constructing an objective function based on l2 weighting and an improved Pareto fitness function, replacing a high time-consuming constellation performance simulation model with an RBF (Radial Basis Function) agent model to optimize design, and updating and managing the RBF agent model through sequence sampling in an interest interval.Therefore, a Pareto non-inferior solution set satisfying engineering requirements is acquired as a satellite constellation design scheme, the coverage percentage of a constellation for a target observation region is realized as high as possible, the pixel resolution of an effective load is realized as low as possible, the calculation cost and the design cost of the satellite constellation are reduced, and the Pareto leading edge search capability is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Geostationary orbit spacecraft electrical propulsion transfer track control method
The invention relates to a geostationary orbit spacecraft electrical propulsion transfer track control method. The method comprises the following steps: determining initial conditions, a carrier rocket transmitting a geostationary orbit spacecraft to a first initial orbit, and determining a Kepler radical of the first initial orbit; establishing a first initial orbit kinetic equation by means of the Kepler radical, reducing the orbit inclination angle of the first initial orbit through a thrust azimuth alpha and performing rounding to obtain a second initial orbit, and obtaining transfer time tf1 and a propellant consumption amount mfuel1; fixing a thrust accelerated speed in a second preset plane, transferring the second initial orbit through a thrust azimuth beta to a geostationary orbit, and obtaining transfer time tf2 and a propellant consumption amount mfuel2; calculating total time tf=tf1+tf2 of a geostationary orbit transfer process and a propellant consumption amount of the transfer process; and by taking minimization of the geostationary orbit total time tf as a design object, optimizing the thrust azimuth alpha at a first initial orbit phase to obtain an optimal geostationary orbit transferring scheme.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Satellite constellation system multidisciplinary design optimization method based on agent model
InactiveCN109977576AOvercoming problems such as low design confidenceOptimizing Design VariablesCharacter and pattern recognitionDesign optimisation/simulationSystems designSubject analysis
The invention discloses a satellite constellation system multidisciplinary design optimization method based on an agent model, and belongs to the field of spacecraft constellation application. The method comprises the steps of on the basis of the Walker-delta constellation configuration and a small-sized earth observation satellite structure, establishing a key subject analysis model of the satellite constellation system by comprehensively considering the design requirements of the constellation configuration and a satellite subsystem; adopting a sequence radial basis function based on a support vector machine and a discrete-continuous variable sampling method and taking the satellite constellation system mass as an objective function to optimize a preselected design variable; mapping thediscrete variables in a continuous space through a discrete-continuous variable sampling method; replacing an original analysis model with an RBF agent model; identifying an interest interval by adopting an SVM (support vector machine), and performing sequence sampling in the interval to update and manage an RBF agent model, so that a design scheme which meets the requirements of constellation configuration and a satellite subsystem and has the minimum total mass of the satellite constellation system is efficiently obtained, the calculation cost of the satellite constellation system is furtherreduced, and the optimization efficiency is improved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Satellite system multidisciplinary optimization method based on multi-model fusion
ActiveCN110276159AOvercoming problems such as low confidenceOptimizing Design VariablesDesign optimisation/simulationConstraint-based CADAnalytic modelSubject analysis
The invention discloses a satellite system multidisciplinary optimization method based on multi-model fusion, and belongs to the field of spacecraft system design. The implementation method comprises the following steps: establishing a satellite system key subject analysis model, and optimizing a design variable by taking the satellite system quality as an objective function; in order to improve the solving efficiency of the system scheme optimization problem, a high-precision model and a low-precision model of the geosynchronous orbit transfer subject and the satellite platform structure subject are established, and a Co-kriging agent model is used for fusing model data with different precisions;, sequence filling sampling is carried out through multi-objective optimization with the expected improvement degree and the feasibility probability being comprehensively considered, then the design space is fully explored, and the Co-kriging agent model is updated and managed, so that a scheme which meets the task requirements of the satellite system and has the minimum total mass of the satellite is efficiently obtained, the calculation cost of satellite system optimization is reduced, and the optimization efficiency is improved. The method is helpful for solving the technical problems in other related engineering fields.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1
Solar radiation temperature effect analysis method and system of civil engineering structure
InactiveCN106092628APhysical concepts are clearEfficient analysisStructural/machines measurementLongitudeDirect radiation
The invention discloses a solar radiation temperature effect analysis method and system of a civil engineering structure. The method comprises the following steps: a geographical longitude and a latitude of a position where the structure is disposed are determined, and through installing a sensing apparatus on the structure, an ambient air temperature and a surface wind speed of the structure are measured. By use of a structure solar radiation model, direct radiation intensity, scattering intensity and reflection intensity acting on the surface of the structure are calculated and determined. According to solar radiation intensity of the structure surface, dynamic temperature boundary conditions are established, by use of a finite-element method, a three-dimensional thermal conduction equation of the structure is solved, and a dynamic temperature effect of any one point at the surface of the civil engineering structure or inside the structure can be determined. The method and system are applied to temperature effect analysis and evaluation of various different types of civil engineering structures under a solar radiation effect, and are particularly applied to analysis evaluation of a temperature effect of a structure with a quite small geometric dimension and a structure with complex shielding around.
Owner:WUHAN UNIV OF TECH
Convergence RLC circuit model-based method for analyzing subsynchronous resonance in power system
ActiveCN104978625ARealize accurate quantitative evaluationReduce analysis errorResourcesElectric power systemAlgebraic equation
The present invention discloses an convergence RLC circuit model-based method for analyzing subsynchronous resonance in a power system. The method comprises the following steps of: establishing a power plant model and a series compensated transmission line system model so as to acquire a non-linear differential equation model of each subsystem; generating a state equation model according to a parameter under a particular working condition and the non-linear differential equation model; generating an algebraic equation model according to the Laplace transform and the state equation model; acquiring a final equivalent resistance model so as to acquire a series resonance point; aggregating the final equivalent resistance model into an equivalent second order RLC electric circuit model according to the series resonance point; and quantifying SSR analysis. According to the analysis method provided by an embodiment of the present invention, the final equivalent resistance model is aggregated into the equivalent second order RLC electric circuit model, so that the SSR analysis is quantified, thus implementing the accurate quantification evaluation of SSR, reducing analysis errors and improving analysis accuracy.
Owner:TSINGHUA UNIV +3
Method for measuring content of diboron trioxide in casting powder
InactiveCN101988891ABreak down completelyRapid determinationColor/spectral properties measurementsHydrogen NitrateInductively coupled plasma
The invention relates to a method for measuring the content of the diboron trioxide in casting powder in the smelting technology, which comprises the following steps of: 1. weighing 0.1-1g of sample accurately to 0.0002g, adding the constant quantity of the hydrochloric acid, the hydrogen nitrate and the hydrofluoric acid, adding 0.5-2.0g of mannitol into a beaker, and heating until that the sample is completely dissolved; 2. respectively preparing at least four parts of working curve standard solution for measuring the content of the diboron trioxide in volumetric flasks by the boron standard solution under the same acid medium; and 3. selecting the analysis spectral line of the boron in the medium on the inductively coupled plasma spectrometer (ICPS), measuring the spectral intensity of the boron in the standard solution and the test solution of the working curve at the same time, and computing an analysis result by a computer by means of autoregression. The method dissolves the sample by mixing the hydrofluoric acid with the other acids, and leads the sample to be complexed with the boron by adding the mannitol to lead the boron not to be volatilized and not to be completely decomposed, thereby being applied to measuring the diboron trioxide in the casting powder with the mass fraction within the range from 0.005% to 20%, and being fast in measuring speed and high in accuracy.
Owner:武钢集团有限公司
Dna-encoded libraries having encoding oligonucleotide linkages not readable by polymerases
ActiveUS20150211002A1Reduce incidenceReduce capacitySugar derivativesNucleotide librariesPolymerase LDna encoding
The present invention relates to complexes of oligonucleotide-encoded libraries and methods of tagging and using such libraries. In particular, the oligonucleotides and methods can include complexes having at least one linkage for which a polymerase has reduced ability to read or translocate through.
Owner:X CHEM
Ion chromatography for analyzing various trace metal ions in dye at the same time
ActiveCN101949910AImprove analysis efficiencyLow costComponent separationIon chromatographyPhysical chemistry
The invention discloses an ion chromatography for analyzing various trace metal ions in a dye at the same time, which relates to a method for analyzing various trace metal ions in a dye. The ion chromatography comprises the following steps: comparing the spectrograms of a sample S solution and a blank solution with a series of standard sample spectrograms; calculating the content of each metal ion in the sample S solution and the blank solution according to the working principle of an ion chromatograph and a standard working curve; and subtracting the content of each metal ion in the blank solution from the content of each metal ion in the sample S solution to obtain the content of each metal ion in the sample S. The invention has the advantages of simplicity, easy operation, high analysis efficiency, low cost and easy popularization, while improving the analysis accuracy and prolonging the service life of the analysis equipment; and moreover, the test method of the invention has high sensitivity and the detection limit can reach 0.01 mg / L.
Owner:HANGZHOU JIHUA JIANGDONG CHEMICAL CO LTD
Intra-microchannel mixing method and apparatus
InactiveUS20090129198A1Short timeAnalytical processing can be speededHeating or cooling apparatusTransportation and packagingEngineering
Owner:FUJIFILM CORP
Method for determining content of magnesia in phosphorus ore
InactiveCN101713741AImprove analytical precisionReduce analysis errorMaterial analysis by observing effect on chemical indicatorFilter paperPrecipitation
The invention relates to a method for determining the content of magnesia in phosphorus ore, which comprises the steps of: when the content of the magnesia in the phosphorus ore is determined, directly placing filter paper together with a precipitate into a beaker after solution forms the precipitate and is filtered, dissolving the precipitate in 20mL of solution of hot hydrochloric acid, then performing subsequent titration step and blank experiment to calculate the content of the magnesia in the phosphorus ore, but not adopting hot hydrochloric acid and hot water to wash the precipitate on the filter paper. The method can effectively reduce analytical error and improve analysis precision.
Owner:HUBEI FORBON TECH
Detection method for solvent gasoline in air in working place
ActiveCN104020243ASimplify the sampling processImprove analysis efficiencyComponent separationInjection volumeCross-link
The invention discloses a detection method for solvent gasoline in air in a working place, and relates to the technical field of solvent gasoline detection. The method comprises the following steps of collecting an air sample by using an activated carbon tube, collecting a blank air sample by using a blank sample collector, and delivering the samples to a laboratory for storage; preparing a desorption solution; pouring activated carbon in the activated carbon tube into a solvent desorption bottle, adding the desorption solution into the solvent desorption bottle, and taking the upper desorption solution as a detection solution; debugging a gas chromatograph, and setting a temperature raising program, wherein a bonded and cross-linked chromatographic column is adopted as a gas chromatographic column; preparing a standard solution by adopting carbon disulfide; injecting the upper desorption solution into the gas chromatograph for detection, wherein the injection volume of the desorption solution is 0.5 or 10 microlitres; and quantitatively analyzing a detection result to obtain the concentration of the solvent gasoline in air. According to the detection method, a process is simple, the result is accurate, the method is wide in application range and short in detection time, and the solvent gasoline in air in the working place can be timely detected.
Owner:CHINA PETROLEUM & CHEM CORP QINGDAO RES INST OF SAFETY ENG +1
Digestive tract lesion detection device and method based on infrared spectrum
ActiveCN105147227AAvoid discomfortNo side effectsSurgeryEndoradiosondesLesion detectionComputer science
The invention discloses a digestive tract lesion detection device based on an infrared spectrum. The digestive tract lesion detection device based on the infrared spectrum comprises a capsule-shaped shell, a signal processing module, a signal acquisition module and a wireless communication device, wherein the signal processing module, the signal acquisition module and the wireless communication device are arranged in the capsule-shaped shell, the signal acquisition module is used for acquiring a spectral signal of digestive juice and a spectral signal of the digestive tract, the signal processing module is used for processing the acquired spectral signal of the digestive juice and the acquired spectral signal of the digestive tract, and the wireless communication device is used for sending a processing result of the signal processing module to an external terminal. A guide through hole is formed in the capsule-shaped shell, the signal acquisition module comprises a digestive juice detection module and a digestive tract detection module, the digestive juice detection module is arranged on the hole wall of the guide through hole, and the digestive tract detection module is arranged on the side wall of the capsule-shaped shell. The digestive tract lesion detection device adopts a two-way detection method, acquires the infrared spectral signals of the digestive juice and the digestive tract and can detect the digestive tract multi-directionally. Analysis on the digestive tract according to the two spectral signals is more comprehensive, and the analysis accuracy is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Gas analyzer
ActiveCN103733046AReduce manufacturing costReduce maintenance costsTransmissivity measurementsColor/spectral properties measurementsGas analysisIrradiation
Owner:HORIBA LTD
Analysis method and device for application uninstalling information
ActiveCN106648714AImprove analytical precisionEfficient analysisProgram loading/initiatingSoftware engineeringTerminal equipment
The invention discloses an analysis method and device for application uninstalling information, relates to the field of information technology and mainly aims to solve the problem that application uninstalling caused by crash cannot be effectively analyzed, and consequently the analysis precision of the application uninstalling information is low. The method comprises the steps that according to identification information of terminal equipment where an application crashes and identification information of terminal equipment where the application is uninstalled, terminal equipment where the application is uninstalled due to crash is determined, and statistics is performed on the quantity of the terminal equipment where the application is uninstalled due to crash and the quantity of the terminal equipment where the application is uninstalled; the crack uninstalling rate corresponding to the application is calculated according to the quantity of the terminal equipment where the application is uninstalled due to crash of the application and the quantity of the terminal equipment where the application is uninstalled. The analysis method and device are applicable for analysis of the application uninstalling information.
Owner:BEIJING GRIDSUM TECH CO LTD
Torsional fatigue damage estimation system for shaft system of steam turbine generator unit
InactiveCN105157968AGuaranteed accuracyShort analysis timeMachine part testingSubsonic/sonic/ultrasonic wave measurementFatigue damagePlant safety
The invention discloses a torsional fatigue damage estimation system for a shaft system of a steam turbine generator unit and relates to the field of steam turbine generators. The system is composed of the steam turbine generator shaft system (100), a sensor (200), a modem (300), a collector (400) and a terminal computer (500) connected together successively. According to an estimation module of the terminal computer (500), a model offline processing module (510) and a data real time online processing module (520) are in interaction with a fatigue damage analysis module (530) while the fatigue damage analysis module (530) is in interaction with a result display module (540). The estimation system can realize online torsional fatigue damage analysis of the shaft system of the steam turbine generator unit quickly and the estimation module of the system can be nested into a prior power plant safety monitoring system flexibly. The system is suitable for monitoring torsional fatigue damage of shaft systems of steam turbine generator units in power plants and is also suitable for torsional fatigue damage of shaft systems of general large rotation machines.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for extracting injustice of component attribute information and system for extracting injustice of object attribute information
InactiveUS20070061310A1Easy to completeLow accuracyResourcesSpecial data processing applicationsThird partyExecution unit
A system for inspecting components by evaluating the degree of accuracy of component attribute information provided by third parties, wherein a performance unit for performing the evaluation of the component attribute information comprises a unit for extracting components similar to target components; a unit for determining the abnormality of component attribute information when the component attribute information can take limited kinds of values; a unit for determining the degree of the abnormality of the component attribute information when the component attribute information can take unlimited kinds of values; and a unit for sorting the components in the order of descending degree of abnormality of the component attribute information to clarify the reason for the evaluation result.
Owner:HITACHI LTD
Method and apparatus for analysis of poly (biphenyl chloride) in electrical insulating oil
InactiveUS20110126609A1Improve analytical precisionDifficult to separateComponent separationIon-exchanger regenerationMethacrylateOil can
An object of the present invention is to provide a method and an apparatus by which PCBs in insulating oil can be analyzed with high accuracy in a convenient, inexpensive, and rapid manner. The method for analyzing polychlorobiphenyls by measuring the concentration of polychlorobiphenyls in insulating oil comprises a step of, as pretreatment, bringing particles of a copolymer that contains divinylbenzene and a methacrylate organic monomer as monomer components into contact with insulating oil containing polychlorobiphenyls, so as to separate polychlorobiphenyls in insulating oil from oil content that is an impurity. The methacrylate organic monomer preferably has a diol type hydroxyl group.
Owner:HITACHI HIGH-TECH CORP
Harmonious wave detecting method in power system
InactiveCN106771592AImprove analytical precisionThe measurement error is large, which seriously affects the harmonic detection accuracy and avoidsSpectral/fourier analysisWavelet filterWavelet packet transformation
The invention discloses a harmonious wave detecting method in a power system. On the basis of five-layered db 40 wavelet packet transformation, hilbert transform is applied to perform frequency shift operation; every harmonic component is transferred to a side frequency band with relatively high precision, so as to perform wavelet packet decomposition and signal reconstruction, thus the high-precision detection of every harmonic wave is realized. The method includes steps of S01, moving every frequency classification of a former signal to 25-75 Hz frequency sections by hilbert transform; S02, respectively performing wavelet packet decomposition and reconstruction on every component after moving frequency; S03, respectively moving frequency of every restructured component and restoring to original frequency section; S04, acquiring the harmonious wave detecting result according to the recorded waveform data. The method provided by the invention eliminates the adverse influence of wavelet filter aliasing of the middle frequency section on the detecting precision, and has high-resolution time frequency analysis ability, and can effectively position the transient state disturbance; the detecting precision is high and the instantaneity is good; the method is applicable to various occasions of harmonious wave detection.
Owner:HUAZHONG UNIV OF SCI & TECH
Gas analysis apparatus
ActiveUS8934101B2Low costImprove analytical precisionRadiation pyrometryInvestigating moving fluids/granular solidsGas analysisLight-emitting diode
A gas analysis apparatus includes: a first reflector that reflects measurement light from a light emitting unit disposed outside a gas flue wall and transmitted through a sample gas. A light receiving unit outside the gas flue wall receives measurement light reflected by the first reflector. A second reflector outside the gas flue wall reflects measurement light toward the light receiving unit. A computing unit analyzes sample gas by allowing the measurement light to be reflected by the first reflector and performs correction or calibration of the gas analysis apparatus using known substances within an associated containing unit along the light path between the light emitting unit and the second reflector by allowing measurement light to be reflected by the second reflector. A switching unit outside the gas flue wall selectively removes or inserts the second reflector from the light path during component concentration analysis and correction or calibration, respectively.
Owner:HORIBA LTD
Preparation device and detection method of carbonate coupling isotope
ActiveCN109100451AUnderstanding Eco-environmental EffectsAvoid swappingComponent separationCouplingNatural abundance
The invention provides a carbonate coupling isotope preparation device. The preparation device enables continuous injection of multiple samples in a closed environment, and the sample introduction environment and the preparation process can effectively avoid the interference of carbon dioxide gas containing <13>C<18>O<16>O generated by the sample by carbon dioxide in air. The invention further provides a detection method of the carbonate coupling isotope, wherein the preparation of carbon dioxide gas containing <13>C<18>O<16>O using the carbonate coupling isotope preparation device, and the abundance of elements is detected; and the application of the preparation device in carbonate coupling isotope detection is also provided.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Field emission electron gun
InactiveUS20070096838A1Improve image qualityImprove resolutionElectric discharge tubesOscillations generatorsElectron collisionSecondary electrons
Electron beam equipment fitted with a field emission electron gun (FEG) having an extractor electrode, an acceleration electrode, a repeller electrode disposed between the extractor electrode and the acceleration electrode, and a repeller power supply for applying a given voltage to the repeller electrode. Electrons extracted from the emitter collide against the extractor electrode, producing secondary electrons moving toward the acceleration electrode. The secondary electrons are repelled by the repeller electrode and thus prevented from reaching the specimen.
Owner:JEOL LTD
Portable laser probe component analyzer
ActiveCN103558191AAvoid destructionReduce volumeEmission spectroscopyAnalysis by thermal excitationMicrocontrollerLaser probe
The invention discloses a portable laser probe component analyzer, which comprises a detection head and a host system. The detection head consists of a shell, an optical fiber collimating mirror and a lens. The host system includes a microcontroller, a portable PC machine, a laser power supply, a spectrometer, a light collector, a dichroic mirror, an optical fiber coupler, a diaphragm and a laser emission head. The laser pulse and collected light are all transmitted through one same optical fiber, thus avoiding a complex optical path system, reducing the detection head volume of the laser probe component analyzer, and enhancing the anti-interference performance and repeatability of the system. By adopting dual pulse excitation, the detection limit can be well reduced, and the signal-to-background ratio and the plasma spectrum stability can be improved. At the same time, small energy laser pulse with a pulse energy of 10-20mJ is employed to excite a sample and improve the analysis accuracy, and large damage to the sample surface can be avoided simultaneously. Upper computer software is employed to control a small displacement platform to realize automated focusing and collection.
Owner:WUHAN XINRUIDA LASER ENG +1
Liquid-state in-situ corrosion fatigue device and testing method
InactiveCN108982349AGood sealing performanceLow costWeather/light/corrosion resistanceTest sampleSubmersible pump
The invention provides a liquid-state in-situ corrosion fatigue device and a testing method. The device comprises a panel, a side plate, a guide pipe, a fixed platform and a sealing part. The liquid-state in-situ corrosion fatigue device has the advantages that a flow speed of a corrosion solution can be adjusted through changing the power of a submersible pump. The liquid-state in-situ corrosionfatigue device has good sealing performance, can be repeatedly utilized for long time, has certain corrosion resistance and has certain tolerance on inorganic acid and alkali type corrosion media; theliquid-state in-situ corrosion fatigue device is low in cost, simple in structure and easy to process and assemble; the testing method provided by the invention is combined, and a test sample can bemonitored in real time in a liquid in-situ corrosion fatigue experiment process. The testing method can be used for eliminating influences, caused by the corrosion solution, on DIC (Density IndicatingController) information acquisition quality; good analysis precision can be ensured. The testing method is simple in steps and is easy to operate.
Owner:CIVIL AVIATION UNIV OF CHINA
Large-area soil heavy metal detection and spatial and temporal distribution characteristic analysis method and system
ActiveCN114443982AComplete area coverageHigh precisionDigital data information retrievalEarth material testingComputational scienceAnalytic model
The invention discloses a large-area soil heavy metal detection and spatial and temporal distribution characteristic analysis method and system, and the method comprises the following steps: S1, setting a large-area soil heavy metal detection and spatial and temporal distribution characteristic analysis system; S2, constructing an analysis model for large-area multiple heavy metal element spatial distribution; s3, determining an analysis object; s4, sampling and detecting the urban surface soil in each gridding area; and S4, substituting the sampled composite detection data into the analysis model, analyzing the soil heavy metal content and geographic information, and drawing a total content distribution diagram of the four heavy metal elements. The system provided by the invention comprises a remote server, a plurality of front-end machines and terminal equipment. According to the method, the distribution characteristics of the heavy metal elements in the large area are analyzed by screening key detection objects, constructing a new mathematical model and comprehensively utilizing sampling point data and geochemical survey data, the area coverage of the analysis result is complete, the accuracy is high, and the automation degree of the analysis process is high.
Owner:CENT SOUTH UNIV
Electronic probe analysis method for testing trace elements Na, K, P, S and Ni of lunar glass beads
ActiveCN113834835AImprove accuracy and precisionLow detection limitMaterial analysis using wave/particle radiationPhysicsStandard samples
The invention relates to an electronic probe analysis method for testing trace elements Na, K, P, S and Ni of lunar glass beads. The method comprises the following steps of: preparing a sample; selecting a proper glass standard sample; determining characteristic X-rays for testing Na, K, P, S and Ni elements; determining test voltage; determining current and beam spot conditions; determining an analysis spectrometer and a crystal; determining peak position test time of each element; determining characteristic X-ray peak positions and backgrounds of the Na, K, P and Ni elements in the glass standard sample; determining the peak position and background of the S element in the glass standard sample; correcting an overlapping peak; testing the components of the glass standard sample; and testing the components of a moon glass bead to be tested. The trace elements in the lunar glass are analyzed by optimizing the electronic probe analysis method, the accuracy (reproducibility) is high, the content change of the trace elements is within + / -10%, and the damage to the lunar glass beads caused by an electronic probe is effectively reduced.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Raman spectrum detection optical path device and detection method thereof
The invention provides a Raman spectrum detection optical path device. The Raman spectrum detection optical path device includes a light source assembly, which is used to emit excitation light on the object to be detected and generate a Raman spectrum; a lens, which is used to collect the Raman spectrum generated when the light source assembly is irradiated on the object to be detected, and convert the resulting The Raman spectrum is focused into a light spot; an optical fiber, one end of the optical fiber is distributed in a cylindrical shape, and the other end is distributed in a flat shape. The cylindrical end of the optical fiber is used to collect the light spot focused by the lens, and the flat end of the optical fiber is It is used to arrange the light spots into narrow strips of light and output them; grating and photodetector. The invention also provides a detection method of the Raman spectrum detection optical path device. The Raman spectrum detection optical path device and detection method of the present invention design one end of the optical fiber into a cylindrical shape and the other end into a flat shape, thereby arranging the focused light spots into narrow strips of light to achieve high-magnification focusing and improve detection of weak Raman Spectral detection capabilities.
Owner:ZHEJIANG PHARMA COLLEGE
Method for measuring arsenic in sulfate slag
InactiveCN101832917ARapid determinationAccurate measurementPreparing sample for investigationColor/spectral properties measurementsSlagSpectrograph
The invention relates to a method for measuring arsenic in sulfate slag. An aqua regia sample is adopted and the method comprises the following steps of: weighing pure iron equivalent to iron in the sample in quantity, performing matrix matching by adopting iron base, preparing standard solution of a working curve with effectively eliminating the base interference of the iron base, selecting an analysis spectral line of the arsenic in the sulfate slag by using the conventional inductive coupling plasma spectrograph in a control laboratory, measuring the working curve and the spectral intensity of the arsenic in the test solution on the inductive coupling plasma emitting spectrograph, and directly obtaining the analysis result of the sample by automatic regression calculation of a computer. The method solves the problems of fussy operating process of sample dissolution, absorption and color comparison in the conventional method, poor analysis and operation of high content arsenic and lower analysis result.
Owner:武钢集团有限公司
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