116results about How to "Short analysis period" patented technology

The invention discloses a mixed media access control method of a wireless network. System channels are of time slot, and time slots with fixed cycle are distributed to non-competitive business nodes, non-competitive business data frame is transmitted in the mode of time division multiple access. Competitive business nodes transmit competitive business data frame in the competitive time slots by using the method of random competitive access. After the competitive business data frames conflict, the competitive business nodes send the competitive business data frame again under the condition that the estimated gain value of the channels is more than or equal to a given threshold. Or else the competitive business data is forwarded by a relay node; an access point buffers the signals received before, and realizes the data frame separation by methods of serial interference cancellation and minimum mean-square error detection. At the same time, a superimposed pilot channel estimation method is used by the competitive business data, no additional time slot is needed in the method, thus being convenient for orthogonal design. The method is suitable for the unexpected properties of competitive businesses and the cyclical properties of non-competitive businesses, and the mixed transmission of the two businesses can be supported.

The present invention belongs to the field of physical property measurement and analysis of material, and relates to the grain size calculation for various inclusions in metal material. The in-situ counting and analysis of inclusions in metal material includes the following steps: conventional analysis to obtain relevant data of the grain size distribution of various inclusions in the sample via metal structure detection, chemical phase state analysis, and electronic microscope plus energy spectrum analysis; in-situ statistical analysis with in-situ metal analyzer for continuous scanning of the sample to obtain single spark spectrum strength data corresponding to the original position of the sample; system analysis to obtain single spark spectrum strength data and determine signal threshold; establishing mathematic analysis mode and comparing the data obtained in different methods to obtain the grain size distribution information of various kinds of inclusions and output result.

The invention relates to a method for measuring trace impurity concentration of 7N electronic grade ultrapure ammonia. The method comprises the following steps of: separating trace impurities from the ultrapure ammonia by a pipeline system subjected to corrosion-resistant and adsorption-resistant treatment, by large-flow replacement, sweeping and sampling and a three-valve four-column cutting back-flushing gas channel system; and analyzing impurity gases by using a direct current discharging helium ionization detector (DID). The method has the advantages of capacity of providing a balanced (stable state) analysis value within short time, quantitative accuracy, low detection limit and short analysis period.

The invention discloses a silane sampling system adopting gas chromatography and a method thereof. The system comprises a sample introduction system, a high-purity helium scavenging line, a quick sample replacement pipeline, a venturi tube vacuum generation device and an alkali absorption cell, wherein the sample introduction system comprises a plurality of sample introduction pipelines, the high-purity helium scavenging line comprises a helium scavenging valve, a second filter, a pressure regulating valve, a second pressure gauge, a gas chromatography needle valve and a six-way proportional valve, which are connected in sequence, the quick sample replacement pipeline comprises an air release needle valve and a float flowmeter, and the venturi tube vacuum generation device comprises a nitrogen valve, a first pressure gauge, a first vacuumizing valve, a second vacuumizing valve and a venturi tube. The silane sampling system disclosed by the invention can be used for quickly scavenging and completely replacing the whole sample introduction system to avoid interference of residues in dead corners on analysis when switching samples on various detection points for analysis; and the system and the method disclosed by the invention are short in analysis period, safe, simple and convenient to operate and capable of meeting high frequency analysis requirements of industrial production.

The invention discloses analysis of trichloromethane stationary phase by a gas chromatography method, and a preparation method and applications of the stationary phase. The stationary phase consists of modification polyethylene glycol, methyl silicone rubber SE30 and a 6201 supporter with a mass ratio of 9-10:10-11:100. The preparation method of the stationary phase is simple, and free in special equipment; and the prepared stationary phase is used to prepare a gas chromatography column. The gas chromatography column is low in cost, economical and practical; the analysis period is short and can be finished in 15 minutes; the peak time of carbon tetrachloride is ahead of the main peak trichloromethane; and thereby the detection accuracy is improved, and a new detection chromatography column is provided for the analysis of trichloromethane.

The invention relates to an analyze method used in digit image color analyzing system, wherein said method comprises: system preparation that connecting the power source of standard light source, the power source of image collector, the power source of PC, and operating the software of said system; loading image that when the software the instruction that loading image, the central processor of PC will send collecting signal to the image collecting processing interface; and the image collecting processing interface board will calculate the data from the image collector and store the data in PC as document format; using software to open image document and displaying it on color analyzing system software; and the steps that base data check, line analysis and region analysis. The invention has the advantages that: said invention has short time, low cost and high accuracy.

The invention relates to a gait analysis method and a device, which relate to the field of medical technology and solve the problems of high cost, long cycle and high professional requirement of the prior method. The method is realized based on walking video of an analysis object. According to gait parameters to evaluate the physical condition of the analysis object, the method is mainly used forhuman gait analysis.

The invention discloses a method for genome selection analysis of livestock and poultry and a livestock-and-poultry breeding method, wherein the method for genome selection analysis of livestock and poultry comprises selecting a plurality of livestock-and-poultry individuals with phenotype data, genotype data and genealogical data for forming a reference group; respectively processing the phenotype data, the genotype data and the pedigree data from the reference group; constructing a reference group model based on the processed data, and obtaining an optimal model; predicting a candidate groupby means of the optimal model; and performing result processing and outputting. The method and the model according to the invention are obtained through combining a traditional BLUP method based on pedigree information and a GBLUP method based on SNP mark information. The model form of the method is not remarkably different from the BLUP method and the GBLUP method. The method of the invention follows a specific data processing and cleaning method and a principle, and greatly improves genome selecting accuracy through constructing a specific model. Furthermore the result output of the invention better satisfies the requirement of an enterprise user and realizes shorter analysis period.

The invention relates a separation and detection method of an irradiation product DBP (Double-Base Propellant) and/or MBP (Myelin Basic Protein) in a TBP (Tri-Butyl Phosphate)-kerosene-HNO3 system, which is characterized by comprising the following steps of: firstly, extracting the TBP-kerosene-HNO3 system containing the irradiation product DBP and MBP with a Na2CO3 solution and separating to obtain an organic phase containing a TBP-kerosene-HNO3 system and a Na2CO3 aqueous phase containing DBP, MBP and micro TBP; and secondly, extracting the obtained Na2CO3 aqueous phase containing DBP, MBP and micro TBP with CHCl3 and separating to obtain a CHCl3 organic phase containing micro TBP and a Na2CO3 aqueous phase containing DBP and MBP. The separation and detection method is simple and convenient, does not need expensive instruments and has a short analysis period.

This invention discloses a high-efficiency liquid phase chromatography detection method for PDE-5 inhibitor in Chinese patent drug, health food and food. Diode array detector is adopted, and octadecylsilane chemically bonded silica is used as liquid phase chromatographic column of filling agent; the mobile phase is phosphoric acid triethylamine solution-methanol-acetonitrile system; the flow rate is 0.5 to 1.5 ml/min; the column temperature is 20 to 50 degrees centigrade; the pre-process of the sample uses acetonitrile or methanol for ultrasonic extraction; the sample is analyzed in the wavelength range from 200 mm to 400 mm. This invention has simple pre-process method, high accuracy, good specificity, short analysis cycle and wide detection concentration range; one analysis can detect eleven kinds of PDE-5 inhibitors; the invention is applied to qualitatively and quantitatively analyze PDE-5 inhibitor in Chinese patent drug, health food and food, which can greatly improve detection efficiency, save detection cost and meet the daily monitoring and detecting requirement.

The invention discloses a determination method for nickel content in ferrochrome-nickel anti-corrosion alloys. The determination method comprises the following steps that alloy samples to be tested are weighed, hydrochloric acid is added, and nitric acid is dropped in drops by drops on an electrothermal plate for heating and dissolution, after dissolution and cooling are completed, a yttrium standard solution is added for constant volume, and a sample solution is prepared; high-purity metals and/or metal oxides containing metallic elements in the alloy samples to be tested are/is used as raw materials to prepare a nickel standard solution and other metallic element standard solutions containing various other metallic elements contained in the alloy samples to be tested, a calibration curvesolution is prepared by the nickel standard solution and other metal element standard solutions; the sample solution and the standard curve solution are introduced into an inductively coupled plasmaemission spectrometer to measure the signal strength, a standard curve is drawn according to the measured results and the nickel content in the samples is calculated according to the standard curve. The determination method for the nickel content in the ferrochrome-nickel anti-corrosion alloys is less in used reagents, simple in operation, short in analysis period, and can quickly detect the nickel content.

The invention discloses a melting sampling-X ray fluorescent spectrometry for determining primary and secondary components of a ferromolybdenum alloy, which is used for the X-ray fluorescence spectrometer analyzing by adding a ferromolybdenum alloy powder sample, a mixed oxidant, and a flux into a platinum crucible, and directly melting the above components into a glass sheet by a melting furnace.Compared with the prior art, the method is few in operation steps, simple and clear, and easy to master. Most importantly, the step for preprocessing an alloy melting sheet is eliminated, the safetyproblems of corrosion, penetration, etc., when the platinum crucible contacts with the alloy at a high temperature. According to the melting sampling-X ray fluorescent spectrometry for determining theprimary and secondary components of the ferromolybdenum alloy, a six-station electric melting furnace is adopted, six alloy samples are analyzed in about 0.8h from sample weighing to result reporting, the corrosion probability of the crucible is zero, the analysis result of the sample meets the precision requirements in the relevant national chemical analysis standards, and the method can be applied to alloy inspection of the steel and iron enterprise, internal quality control and factory inspection of the alloy manufacturer.

The invention belongs to the technical field of nuclear facility decommissioning and three-waste treatment, and particularly relates to a method for measuring 63Ni in a metal sample. The method comprises the steps of taking a metal sample, adding HCl, heating on an electric heating plate, adding hydrogen peroxide and perchloric acid after the sample is dissolved, and fixing the volume to a volumetric flask (1) by using HCl; carrying out separation and enrichment on 63Ni, 55Fe and 60Co, and loading anion exchange resin into an ion exchange column; balancing the ion exchange column by using HCl,taking a sample with the volume of V2 from the volumetric flask (1), and putting the sample on the column to ensure that the iron content is not more than 150mg; adding HCl to wash the ion exchange column, combining and collecting an adsorption effluent and a washing effluent to serve as a nickel column-loading solution with the volume of V3; and carrying out separation and enrichment on 63Ni, 137Cs and 90Sr, placing a nickel resin column on a vacuum extraction box, and taking ammonium citrate, and adding ammonium citrate into the nickel resin column to be balanced. By adopting the analysis method, enrichment of low-content 63Ni in a sample can be realized, interference of nuclides such as 55Fe, 60Co, 137Cs and 90Sr on 63Ni measurement is eliminated, and the method has the advantages of short analysis period, high accuracy, good reloading recovery rate and the like.

The invention belongs to the analysis and detection field, and specifically relates to an ICP-OES method for determination of the content of tungsten in ferrotungsten. The technical problem to be solved by the invention comprises that provided is the ICP-OES method for determination of the content of tungsten in ferrotungsten, wherein the method includes the following steps: A, making a standard curve: preparing n standard solutions with the mass concentration of tungsten in 40-80%, detecting the light intensity value of each standard solution by a plasma emission spectrometer, and drawing theconcentration-light intensity standard curve through the concentrations and the corresponding light intensity values, wherein n>=2; B, preparing a to-be-tested solution: mixing ferrotungsten, a mixedacid solution and hydrogen peroxide, heating to completely dissolve ferrotungsten, and thus obtaining the to-be-tested sample; and similarly, detecting the to-be-tested sample by the plasma emissionspectrometer, to obtain a corresponding light intensity value; and C, according to the concentration-light intensity standard curve of the step A and the light intensity value of the step B, obtainingthe mass concentration of tungsten in the to-be-tested sample, and then calculating to obtain the content of tungsten in ferrotungsten. The method has the advantages of fast operation and accurate results.

The invention discloses a method for measuring the content of the nickel in low nickel iron. The method comprises the following steps: S1, a sample is divided into two measuring flasks and displayed; and S2, color development is performed according to the S1, an absorbance value is recorded, a work curve is drawn, and a sample measurement value is looked up from the work curve. The method for measuring the content of the nickel in the low nickel iron can be operated conveniently, is short in consumed time, and can accurately measure the content of the nickel in the low nickel iron.

The invention discloses a method for determining a content of methylmercury in fish oil, which comprises extracting a sample, performing chromatographic analysis, performing atomic fluorescence analysis, performing data acquisition on intensities of fluorescence emitted from mercury atoms by data processing software, and listing the collected data to conveniently and accurately detect the content of methylmercury in the fish oil. The invention has advantages that it simultaneously employs the chromatographic analysis and atomic fluorescence analysis, and carries out selection of a mobile phase, and control of the concentration and flow rate of the mobile phase in the chromatographic analysis, and selection of a reductant and an oxidant and control of the lamp current and carrier gas in the atomic fluorescence analysis, thus the content of methylmercury in the fish oil is determined rapidly and conveniently. In addition, the method has low reagent consumption, short analysis period, good stability and high accuracy, and is very practical.

The invention provides a method for analyzing the SEBS hydrogenation degree of butadiene styrene rubber by using a nuclear magnetic resonance technology. The method comprises the following steps: (1)adding an analysis sample into a nuclear magnetic tube; (2) placing the nuclear magnetic tube in a nuclear magnetic resonance analyzer, selecting a corresponding analysis scheme, and scanning the sample to obtain a nuclear magnetic resonance hydrogen spectrum of the sample; and (3) integrating the area of each structural characteristic peak in the nuclear magnetic resonance hydrogen spectrum of the sample, and calculating the relative content of double bonds before and after the reaction of the butadiene styrene rubber sample according to the area of the corresponding structural characteristicpeak, thereby further calculating the hydrogenation degree of the sample. According to the method, rapid analysis can be carried out in the presence of a solvent, the accuracy of the analysis resultis high, analysis equipment operates stably, and a simple, rapid and accurate detection method is provided for detecting the hydrogenation degree of the styrene butadiene rubber SEBS sample.

The invention discloses a method of determining major elements in ferrotitanium through an X-fluorescence fuse piece method. The method comprises the steps that (1) multiple standard samples with granularity being 200 meshes are selected; (2) the standard samples are weighed, and a composite oxidant and a viscosity reducer are added for uniform stirring; (3) a fusing agent is weighed into a platinum crucible, a standard sample obtained after uniform mixing is poured into the platinum crucible and covered with the fusing agent, and the platinum crucible is placed in a muffle furnace to completealloy sample pre-oxidation; (4) the platinum crucible subject to pre-oxidation is placed in a melting furnace for melting, a release agent is added for rotary shaking before release, and then coolingrelease is performed to prepare a glass sheet for analysis; (5) an X-ray fluorescence spectrometer is adopted to test the strength of the major elements in the standard sample, and tested strength values and standard values are made into a primary work curve; and (6) a to-be-detected sample of the blocky ferrotitanium is ground to have the same granularity as the standard sample and is melted into a glass sheet according to the steps (2) to (5), and the X-ray fluorescence spectrometer is used to analyze component values of the to-be-detected sample. The method can be used for determining theelements in the ferrotitanium with high titanium content, the life of the platinum crucible is prolonged, and result accuracy and precision are guaranteed.