57results about How to "Reduce analysis steps" patented technology

The invention discloses a method for quickly screening and detecting azo dyes forbidden in textile materials, leathers and dyes using gas chromatography mass spectrometry, which comprises the following steps: 1) preparing a sample, 2) subjecting the sample to reduction reaction, 3) extracting the sample, 4) performing the gas chromatography mass spectrometry on the sample, 5) screening decision: compared with the GC-MS analysis result of a standard solution, if the retention time and the mass spectrum of the aromatic amine in the sample keep with standards, the sample is judged as a suspicious positive sample, otherwise it is a negative sample and directly judged as a qualified sample. The sample pre-treatment time is shortened, the cost is reduced, the detection time is shortened, the operation step is simple, the operation is convenient, the operation time is short, the operation cost is low, the detection efficiency is improved; the aromatic amine in the sample is detected by a gas chromatography mass spectrometer, color interference problem is not existed, the sample matrix is effectively prevented from being infected, and the judgment accuracy is high, thus the method is not only suitable for textile materials, but also suitable for other products such as leathers and dyes.

The present invention belongs to the technical field of element determination in a rare earth metal / an alloy, and in particular relates to a method for rapid determination of content of rare earth elements and non rare earth elements in the rare earth metal / the alloy on the basis of full spectrum direct reading spark emission spectrometry. The method includes the following steps: (1) sample pretreatment; (2) setting of excitation conditions of a spark light source; (3) selecting of an analysis line pair; (4) establishing of a working curve; (5) curve correction; and (6) sample analysis. No chemical reagent is used, a solid sample can be directly detected, determination time is shortened to within 2 minutes from a few hours of that of a national standard method, determination results are consistent with those of the national standard method, precision is good, and a blank for rapid element determination of the rare earth metal / the alloy is filled.

The invention relates to a method for determining ethanol and isopropyl benzene contents of air and waste gas, and mainly aims to solve the problem that ethanol and isopropyl benzene cannot be sampled and analyzed at the same time in the air and the waste gas in the prior art. The method for determining ethanol and isopropyl benzene contents of the air and the waste gas comprises the following steps: (1) sampling with an activated carbon tube at a sampling point, immediately enclosing the two ends of the activated carbon tube after sampling, and waiting for determination; (2) opening the activated carbon tube collected in the step (1) during detection, pouring activated carbon into a solvent desorption bottle, and extracting upper-layer desorption solution for determination; (3) injecting the desorption solution obtained in the step (2) into a gas chromatograph, quantitatively analyzing under a certain chromatographic condition, and dividing a detection result by a sampling volume to obtain the concentrations of the ethanol and the isopropyl benzene in the air and the waste gas at a workplace. If the sample concentrations exceed a detection range, the problem is well solved by determination after dilution with the desorption solution. The method can be applied to determination of the ethanol and isopropyl benzene contents.

The invention discloses peanut quality determination and evaluation methods suitable for gel type protein processing. The determination method comprises the following steps of: determining fruit shape score, total protein content, coarse fiber content, glycine content, cysteine content, leucine content, arginine content, arachin content, conarrachin content, conarrachin I content and mass percentage content of subunit with molecular weight of 23.5 kDa in the total protein of a peanut sample to be determined; and substituting all the determined values into a formula (1) to obtain the gelling property of the peanut sample to be determined. The invention provides a peanut quality evaluation method suitable for gel type protein processing, wherein the gelling property of the peanut protein is subjected to K-means cluster analysis by using SPSS (Statistical Package for the Social Sciences) software, is sequentially arranged according to size and is divided into three categories, i.e., suitable, basically suitable and unsuitable categories. A peanut quality determination model suitable for the gel type protein is established, the size of the gelling property can be determined through quality characteristics of several peanuts; and the determination of indexes such as amino acid in the model is predicted by using a near infrared analyzer to guarantee convenience and quickness.

The invention discloses a method for measuring iron / calcium ratio in an iron-calcium core-spun yarn, which comprises the following steps: preparing standard solutions which comprise a calcium standard solution and an EDTA (ethylene diamine tetraacetic acid) standard solution, and calculating the concentration C of the EDTA standard solution; separating iron powder and calcium particles in the iron-calcium powder with a magnet, and adding water and the EDTA standard solution into the separated iron powder to prepare a sample solution; and titrating the sample solution with the calcium standard solution, and calculating the iron / calcium ratio in the iron-calcium core-spun yarn according to the concentration of the calcium standard solution and the concentration C of the EDTA standard solution. The technical scheme disclosed by the invention can be used for accurately measuring the iron / calcium ratio in the iron-calcium core-spun yarn, and is simple to operate.

The invention belongs to an ocean chemical engineering technology, and particularly relates to a method for measuring the chitosan oligosaccharide content in a specific polymerization degree range. According to the method, a dextran standard product is subjected to chromatographic analysis, a standard curve is drawn, and a linear regression equation is obtained; chitosan oligosaccharide molecular weights M1 and M2 corresponding to two end values n1 and n2 of the specific polymerization degree range to be measured are substituted into the linear regression equation, and the chitosan oligosaccharide chromatographic retention time t1 and t2 of the two end values of the specific polymerization degree range to be measured; a chitosan oligosaccharide solution to be measured is analyzed by measuring the chromatographic analysis condition of the standard sample, the chromatographic peak total area A corresponding to the sample to be measured and the chromatographic area A<t1-t2> in the chitosan oligosaccharide chromatographic retention time t1 to t2 of the two end values of the specific polymerization degree range to be measured are obtained through a chromatogram of the sample to be measured, and the chitosan oligosaccharide content of the specific polymerization degree range n1 to n2 is obtained according to a chromatographic area formula. The method has the advantages that the chitosan oligosaccharide content of the specific polymerization degree is indirectly measured by using the molecular weight as a calibration measure through gel exclusion chromatography, the analysis steps are few, and the operation is simple and convenient.

The invention discloses a rapid analysis method for sodium hydroxide and ammonia content in sodium cyanide reaction solution and its liquid products, which uses excess formaldehyde and ammonia to react to generate hexamethylenetetramine, and then divides into two groups of titration with hydrochloric acid, Obtain two sets of values ​​of ammonia-containing acid consumption and ammonia-removing acid consumption, and then calculate the content of sodium hydroxide and ammonia in the sample through data measurement, thereby effectively reducing the interference of free ammonia on the analysis of sodium hydroxide content, and quickly and accurately analyzing cyanide. Sodium hydroxide content and ammonia content in sodium chloride reaction liquid and its liquid products. The method of the invention is fast and effective, has obvious mutations in analysis and titration, accurate and reliable measured values, simple and convenient operation and easy mastery.

The invention relates to the technical field of network analysis, and discloses a data filtering method in the network analysis. The method specifically includes the steps of (1) reading filtering and screening allocation data into a container; (2) setting the allocation data inside the container as a filtering and screening allocation node, and setting a filtering property or a screening property under the allocation node; (3) according to setting of the allocation node, hierarchically displaying the allocation data inside the container on an analysis interface in a tree structure mode. According to the data filtering method in the network analysis, by displaying the allocation data in a tree structure mode, the allocation conditions of data package filtering are visually displayed; by filtering and screening relative data according to specific setting under the allocation node, fast query and statistics of data details filtered or screened according to properties under a certain filtering or screening condition can be achieved to improve analysis efficiency.

The invention relates to the technical field of network security and data processing, and relates to a method, device and equipment for analyzing and classifying network traffic and a storage medium.The first aspect of the invention provides a method for analyzing and classifying network traffic, which comprises the following steps of: acquiring a message; shunting the message according to a protocol, wherein the message at least comprises common TCP / UDP; for the common TCP / UDP, extracting the fingerprint of each type according to a payload clustering method; obtaining a domain name with themaximum jaccard coefficient in the network connection; and judging whether the existing resource library has related characteristics or not, and if not, storing the corresponding classification rules.The invention further provides electronic equipment and a computer readable storage medium. According to the method for analyzing and classifying the network traffic, a sample library does not need to be prepared in advance, the traffic in the network can be automatically classified, the attribution service of each type of traffic is analyzed, and the whole process realizes automatic and accurateclassification.

The invention relates to a detecting method for traditional Chinese medicine components, in particular to a detecting method for effective components of traditional Chinese medicine Hugu capsules for preventing and treating osteoporosis, which is used for detecting effective components of Hugu capsules by means of multi-wavelength high-performance liquid chromatography. The detecting method includes the specific steps: a, preparing sample solution to be detected; b, preparing mixed reference sample solution; c, respectively detecting the sample solution to be detected and the mixed reference sample solution by means of high performance liquid chromatography; and d, comparing a high performance liquid chromatogram of the sample solution to be detected with that of the mixed reference sample solution. The detecting method can be used for simultaneously detecting chlorogenic acid, 2, 3, 5, 4'-tetrahydrostibene-2-O-beta-D-glucoside, ferulic acid, naringin and icariin and the content of the five effective components in the Hugu capsules. When the effective components in the Hugu capsules are detected by the method, high performance liquid chromatograms of standard substances of the five components are omitted, time and reagents can be reduced, and the detecting method is simple, convenient, high in precision and fine in reproducibility.

The invention discloses a method for measuring and evaluating quality of a peanut raw material for protein processing. The method for measuring comprises measuring a fruit shape score, total protein content, leucine content, arginine content, conarachin I content and mass percentage content of subunit having molecular weight of 23.5 kDa in total proteins of a peanut sample to be measured, substituting the above measured values into the formula (1) and acquiring protein powder quality of the peanut sample to be measured. The method reduces analysis steps and is suitable for enterprise application. A peanut protein processing raw material quality evaluation model is built. Through six peanut quality characteristics, the peanut protein powder quality is determined. A near-infrared analyzer can conveniently and fast forecast indexes such as amino acids in the model. Through near-infrared analyzing detection of peanut kernels, all indexes in the forecasting model can be acquired simultaneously and the damage to peanut kernels is avoided. The method is convenient and fast.

The invention discloses a spectrum-potential-temperature multi-dimensional titration analyzer. The analyzer comprises a spectrum titration measurement device, a temperature titration measurement device and a potential titration measurement device arranged in parallel; synchronous measurement requirement of different analysis methods in chemical analysis can be satisfied, the measurement precision between different measurement methods is improved, the workload of repeated single experiments is effectively reduced, and the synchronous measurement for the same analysis object and different analysis methods can be realized. The invention further provides a use method of the spectrum-potential-temperature multi-dimensional titration analyzer, analysis results in different angles and with different representation parameters can be provided for the material structure change process in the chemical reaction by comparing and analyzing the data obtained through different measurement technologies, the precision between different measurement methods and the accuracy of the analysis method are balanced, the workload of the titration analysis is effectively reduced, a more accurate measurement method can be acquired, and the new material physical character and structure data can be discovered.

The invention discloses a distribution network reliability evaluation method suitable for a distributed power supply with high permeability. The method comprises the following steps of dividing a power supply area of the distributed power supply and obtaining a normal system operation period and a system failure operation period through uniform random number inverse transformation; carrying out power matching in the normal system operation period to obtain failure times and failure time of each load point in the corresponding period; carrying out failure effect analysis to obtain an isolated island operation state of each area and the failure times and the failure time which are generated by the failure effect of the component on the load point according to a relative position of a failurecomponent and each area; carrying out power matching in the system failure operation period to obtain the failure times and the failure time of each load point in the corresponding period according to the isolated island operation state of each area; and simulating for many times to obtain the failure times and the failure time of each load point in the simulative total period and computing a reliability index. According to the method, the distribution network reliability evaluation method under the high permeability condition of the distributed power supply is realized.

The invention discloses a method for achieving micronRNA single-step, phase homogenizing and high-sensitivity detection by combining different double recognition processes of hybridization and ligation based on an upconversion luminescence resonance energy transfer (UC-LRET) technology. The method is mainly applied to microRNA expression profiles analysis, microRNA clinical diagnosis, microRNA study detection and microRNA related pharmaceutical studying and screening. The method has the following beneficial effects that the number of operation steps is small, and the method belongs to one-step method detection; the stability is good, long-time storage can be achieved, and the detecting performance is not reduced; and stimulating occurs in a near infrared region (980 nm), so that generation of background fluorescence is avoided. Thus, the method has very good application prospects.

The embodiment of the invention discloses a method and system for analyzing a splicing wall. The analyzing operation of the splicing wall is made simple, standard and unified, the analyzing process can be quantized, and the analyzing efficiency is improved. The method comprises the steps that a splicing wall analyzing system acquires first color gamut data of a preset image displayed by the splicing wall, the first color gamut data are converted into second color gamut data capable of reflecting the brightness and the chroma of the image, the difference of the brightness and the chroma of a preset point is compared according to the second color gamut data, and therefore the analysis of color consistency of the splicing wall is obtained.

The invention relates to a bolt pre-tightening force application method for nonlinear analysis of complex connection structures. The method comprises the following steps: 1, converting bolt pre-tightening force moment into bolt axial force; 2, simplifying a pre-tightening force bolt loading form; 3, carrying out displacement calculation on the bolt axial pre-tightening force; and 4, cutting off a pre-tightening force bolt at any place, establishing the constraint relationship between two sections and the section midpoints thereof, and connecting the midpoint 1, the midpoint 2 and a loading point 3, wherein MPC (multipoint constraint) connection is adopted between the midpoint 1 and the section 1 as well as between the midpoint 2 and the section 2, the translation motion and rotation are constrained through the constraint between the midpoints and the sections, namely, Ux / Uy / Uz and Rx / Ry / Rz. The bolt pre-tightening force application method for nonlinear analysis of complex connection structures is obtained through carrying out improvement on the basis of a traditional bolt pre-tightening force application method, so that the simplification of the nonlinear analysis of complex connection structures, the calculation period is effectively shortened and the working efficiency is improved.

The present invention discloses quality determination of peanuts suitable for peanut oil processing, and an evaluation method thereof. The quality determination method comprises the following steps: determining crude fat content, oleic acid content, linoleic acid content and the total content of unsaturated fatty acids in a peanut sample requiring determination, wherein the crude fat content, the oleic acid content, the linoleic acid content and the total content of the unsaturated fatty acids are respectively the mass percentages of the crude fat, the oleic acid, the linoleic acid and the total unsaturated fatty acids in the peanut sample requiring determination; and substituting the determination values ??into a formula (1) to obtain grease oxidation stability of the peanut sample requiring determination. According to the present invention, a SPSS software is adopted to carry out K-means cluster analysis on a comprehensive value of peanut oil quality, and the peanuts are sequentially ordered according to size, and are divided into three classes of a suitable class, a basically suitable class and an unsuitable class.

The invention provides a tunnel face supporting pressure design method. The tunnel face supporting pressure design method comprises the following steps: setting a target safety coefficient for maintaining short-term stability of a tunnel face and an initial value of supporting pressure according to the current engineering situation; calculating an actual safety coefficient according to the actualparameters of the tunnel structure and the strength reduction method, and continuously iterating until the calculated safety coefficient is the same as the target safety coefficient; in the iterationprocess, serving the ratio of the support pressure of each step to the load reduction coefficient as the support pressure applied by the next iteration step, performing strength reduction calculationto obtain the safety coefficient, and stopping the operation until the calculated current safety coefficient is equal to the target safety coefficient, wherein the corresponding support pressure is the target value at the moment. According to the method, the iteration time is greatly shortened and is generally more than ten hours, and the shortest iteration time is about two hours; and the problems that an existing method is low in efficiency, long in consumed time and not accurate enough are solved.

The invention discloses a method used for liquid chromatographic analysis on biuret in compound fertilizer, which is characterized in that reversed-phase liquid chromatography is adopted; the flowing phase is phosphate buffer solution with the pH value of 6.0; the proportion of carbinol and buffer solution is 5:95; the flowing speed is 1.2ml / min; the detection wavelength is 200nm; a chromatographic column can resist pure water phase; C18 filler is provided and the granularity of the C18 filler is 5 mum; the column length is 250mm and the internal diameter of the column is 4.6mm; the content of biuret in the harmful compositions of the compound fertilizer is calculated by an external standard method; the liquid chromatography quantitative analysis is carried out on the biuret contained in the compound fertilizer by an ultraviolet detector; when the consistency of the biuret is 0.01mg / ml to 0.2mg / ml, the biuret has good linear relationship with the linear correlation coefficient of more than 0.999; the method requires no predisposal on the analyzed sample, thus reducing a plurality of analysis steps and shortening the analysis time; the method is exact and reliable and has economical detection cost.

The invention discloses a white spirit cold-soaking and countercurrent extraction method of polygonatum odoratum polysaccharide in a brewing technique and an online quality control method thereof. The extraction method comprises the steps of (1) slicing polygonatum odoratum or cutting the polygonatum odoratum into sections or grinding the polygonatum odoratum into granules; (2) cold-soaking the polygonatum odoratum in white spirit with alcohol concentration-volume ratio being 45-55% according to a charge rate of 1: (7.0-8.0) by mass; and (3) implementing countercurrent extraction by using white spirit of which the alcohol concentration-volume ratio is 45-55%. According to the optimized solution, the polygonatum odoratum is sliced or cut into sections or ground into granules and is pressed flat by external force. The method disclosed by the invention is direct and high in efficiency, overcomes difficulty in filtration, avoids contamination from moulds and can prevent polysaccharide which has relatively large molecular weight from precipitating in healthcare wine, thus being an ideal method for extracting polygonatum odoratum in the white spirit brewing technique. The solution of the control method does not need pre-treatment on a sample, comprises few analysis step and generates few error influence factors, consumes little time, and is capable of meeting demands of rapid determination and online quality control of samples in batches.

The invention discloses a method for quickly screening and detecting azo dyes forbidden in textile materials, leathers and dyes using gas chromatography mass spectrometry, which comprises the following steps: 1) preparing a sample, 2) subjecting the sample to reduction reaction, 3) extracting the sample, 4) performing the gas chromatography mass spectrometry on the sample, 5) screening decision: compared with the GC-MS analysis result of a standard solution, if the retention time and the mass spectrum of the aromatic amine in the sample keep with standards, the sample is judged as a suspicious positive sample, otherwise it is a negative sample and directly judged as a qualified sample. The sample pre-treatment time is shortened, the cost is reduced, the detection time is shortened, the operation step is simple, the operation is convenient, the operation time is short, the operation cost is low, the detection efficiency is improved; the aromatic amine in the sample is detected by a gas chromatography mass spectrometer, color interference problem is not existed, the sample matrix is effectively prevented from being infected, and the judgment accuracy is high, thus the method is not only suitable for textile materials, but also suitable for other products such as leathers and dyes.

The invention discloses peanut quality determination and evaluation methods suitable for gel type protein processing. The determination method comprises the following steps of: determining fruit shape score, total protein content, coarse fiber content, glycine content, cysteine content, leucine content, arginine content, arachin content, conarrachin content, conarrachin I content and mass percentage content of subunit with molecular weight of 23.5 kDa in the total protein of a peanut sample to be determined; and substituting all the determined values into a formula (1) to obtain the gelling property of the peanut sample to be determined. The invention provides a peanut quality evaluation method suitable for gel type protein processing, wherein the gelling property of the peanut protein is subjected to K-means cluster analysis by using SPSS (Statistical Package for the Social Sciences) software, is sequentially arranged according to size and is divided into three categories, i.e., suitable, basically suitable and unsuitable categories. A peanut quality determination model suitable for the gel type protein is established, the size of the gelling property can be determined through quality characteristics of several peanuts; and the determination of indexes such as amino acid in the model is predicted by using a near infrared analyzer to guarantee convenience and quickness.

The invention discloses a white spirit cold-soaking and countercurrent extraction method of polygonatum odoratum polysaccharide in a brewing technique and an online quality control method thereof. The extraction method comprises the steps of (1) slicing polygonatum odoratum or cutting the polygonatum odoratum into sections or grinding the polygonatum odoratum into granules; (2) cold-soaking the polygonatum odoratum in white spirit with alcohol concentration-volume ratio being 45-55% according to a charge rate of 1: (7.0-8.0) by mass; and (3) implementing countercurrent extraction by using white spirit of which the alcohol concentration-volume ratio is 45-55%. According to the optimized solution, the polygonatum odoratum is sliced or cut into sections or ground into granules and is pressed flat by external force. The method disclosed by the invention is direct and high in efficiency, overcomes difficulty in filtration, avoids contamination from moulds and can prevent polysaccharide which has relatively large molecular weight from precipitating in healthcare wine, thus being an ideal method for extracting polygonatum odoratum in the white spirit brewing technique. The solution of the control method does not need pre-treatment on a sample, comprises few analysis step and generates few error influence factors, consumes little time, and is capable of meeting demands of rapid determination and online quality control of samples in batches.

The invention relates to a strength analysis method and system for a pop-up window replacement assembly with a supporting and limiting mechanism, and the method comprises the steps: obtaining the type of a connection point according to a finite element model formed by a grid model for connecting all parts of the pop-up window replacement assembly under a whole vehicle coordinate system, and building a pop-up window replacement tree structure table in combination with a bom table; analyzing the finite element model under different working condition boundary conditions to obtain stress nephograms of corresponding working conditions; according to the pop-up window tree structure table and the stress cloud atlas, performing analysis in combination with target strength cloud atlas corresponding to different working condition boundary conditions so as to screen out to-be-optimized parts and connection points; stress conditions of different parts and connection points between the parts under different working conditions are simulated and analyzed, influence factors which do not meet requirements in a design scheme can be accurately known at a time in combination with a target strength cloud picture and a pop-up window tree structure table, advantages and disadvantages of the design scheme are determined in the design and development stage, analysis steps are saved, and the design efficiency is improved. And the optimal design scheme can be obtained through rapid optimization iteration.

A three-dimensional terrain trafficability analytical method for an autonomous land vehicle comprises the step of information perception, wherein movement state information and environmental information of the current vehicle are obtained; the step of track searching and generation, wherein track preliminary searching is carried out according to the current vehicle position and a final target position, and a local track set of possible movements of the vehicle is generated; the step of terrain analysis, wherein the contour line of the current terrain is drawn according to obtained terrain altitude data, the intersection point of a candidate track and the contour line is found according to a vehicle speed v, the terrain characteristics of track curved sections formed by a lower intersection point of the contour line and the current position of the autonomous land vehicle are analyzed, and a basic terrain factor is calculated; the step of trafficability analysis, wherein the cost of each track curved section formed when the vehicle passes is calculated by combining dynamic constraints and kinematical constraints of the vehicle, so that a cost chart is constructed; and the step of route planning, wherein the optimal route is searched with the cost chart serving as heuristic information. The three-dimensional terrain trafficability analytical method for the autonomous land vehicle has the advantages of being simple in principle, easy and convenient to operate, high in identification accuracy, efficient in calculation and the like.

The invention discloses an adjustable differential pressure flowmeter, and relates to the technical field of differential pressure flowmeters. The adjustable differential pressure flowmeter comprisesa fixing plate; a differential pressure transmitter and a flow display instrument are fixedly mounted at the top of the fixing plate; a self-adjusting pore plate mechanism is fixedly installed in thefixing plate; four connecting rods are fixedly connected to the left side of the fixing plate at equal intervals; the ends, away from the fixing plate, of the four connecting rods are fixedly connected with a two-phase detection mechanism; and the two-phase detection mechanism comprises a fixing ring piece, an electric heating ring, a vertical rod and a first contact type sensor. The two-phase detection mechanism is matched with the self-adjusting orifice plate mechanism, so that compared with a traditional flowmeter, the flowmeter of the invention can omit the step of analyzing the componentsof detected fluid, and can realize a detection function based on the flowmeter itself under the condition that normal flowing of the fluid is not affected, and an orifice plate can be correspondinglyadjusted according to a detection result.

The invention discloses a method and a device for quickly oxidizing ammonia nitrogen and relates to the technical field of analytical instruments. The invention aims at the problems that the conventional ammonia nitrogen oxidation method is time-consuming and complex in operation steps and does not have special ammonia nitrogen oxidation device. The method comprises the following steps: a, preheating ammonia nitrogen solution; and b, adding oxidant and oxidizing the ammonia nitrogen into nitrite nitrogen. The device comprises an ammonia nitrogen solution conveying branch pipe, an oxidant conveying branch pipe and a container, wherein the container is communicated with the ammonia nitrogen solution conveying branch pipe and the oxidant conveying branch pipe respectively and is used for outputting nitrite nitrogen reactant; and a heater is arranged at the output end of the ammonia nitrogen solution conveying branch pipe and is used for preheating the ammonia nitrogen solution. The method and the device is particularly suitable for measuring the ammonia nitrogen content by gas phase molecular spectroscopy and performing oxidation pretreatment on the ammonia nitrogen in the solution.