58 results about "Qualitative analysis" patented technology

The invention discloses a strategic recommendation method and device, and relates to the technical field of intelligence analysis tools, the method is applied to a computer device capable of calling a knowledge base and a large model, and the method comprises the following steps: retrieving an obtained text fragment based on an input request of a user; based on the input request, calling a large model to carry out site analysis on the input request to obtain a site analysis result; based on the input request, the text fragment and the standing analysis result, calling the large model to combine with the text fragment to perform qualitative analysis on the standing analysis result, and outputting a qualitative analysis result; based on the input request and the qualitative analysis result of the dictionary format, determining an optimal feature vector of the dictionary format by using an analytic hierarchy process; and on the basis of the optimal feature vector, four-quadrant analysis data of each strategy is calculated by using a four-quadrant analysis method, and then optimal strategy pushing is completed. According to the method, qualitative analysis, an analytic hierarchy process and a four-quadrant analysis method are combined, development strategic intelligence analysis is carried out according to requirements input by a user, and strategic suggestions are generated.

The present application relates to a kind of fluorine focus enhanced perfluoro / multi-fluoro alkyl compound analysis method, comprising the following steps: sample is carried out routine data-dependent data acquisition and peak extraction processing, generate basic peak table;Subsequently, fluorine characteristic data screening is carried out based on basic peak table information, constructs the fluorine characteristic static inclusion list based on mass loss for iterative mass spectrum acquisition;Fluorine focus data acquisition method is established based on fluorine characteristic static inclusion list, obtains the liquid chromatography-mass spectrometry data of fluorine focus enhancement by multiple iterative acquisition to the same sample;Finally, fluorine focus enhanced data is carried out non-target cleaning screening and qualitative analysis.Compared with prior art, the present application significantly improves the ability of obtaining tandem mass spectrometry information and identification coverage of trace, unknown PFAS in complex matrix by iterative focusing strategy, effectively solves the problem of low-abundance target compound omission caused by the limitation of the number of PFAS tandem mass spectrometry in single acquisition in traditional non-target screening method.

The application discloses a histidine tag diversity nucleic acid aptamer and application thereof, and belongs to the technical field of biological processing. The nucleotide sequence of the histidine tag diversity nucleic acid aptamer is shown in SEQ ID NO. 3, or SEQ ID NO. 4, or SEQ ID NO. 5, or SEQ ID NO. 6. The application also discloses an application of the histidine tag diversity nucleic acid aptamer in preparation of a biosensor element for targeted recognition of a histidine tag-containing protein or polypeptide. The application also discloses an application of the histidine tag diversity nucleic acid aptamer in qualitative analysis, quantitative detection and separation and purification of the histidine tag-containing protein or polypeptide. The histidine tag diversity nucleic acid aptamer is obtained by taking HisA1-T63 aptamer as an initial chain, preliminarily improving the aptamer through sequence truncation, and repositioning a functional module to a loop region for diversity modification, thereby expanding the structural diversity of the histidine tag nucleic acid aptamer.

This application provides a method and related equipment for calculating the sampling control period of a self-balancing robot. The method includes: acquiring the dynamic model and motor control input information of the self-balancing robot; calculating the sampling control description information of the self-balancing robot for any time interval within a preset sampling interval based on the dynamic model and motor control input information; acquiring the instantaneous energy functional, cyclic correlated energy functional, and interval cumulative energy functional of the self-balancing robot at any time interval, and constructing cyclic energy constraint information based on the instantaneous energy functional, cyclic correlated energy functional, and interval cumulative energy functional; and performing negative qualitative analysis on the cyclic energy constraint information in conjunction with the sampling control description information to calculate the sampling control period corresponding to the self-balancing robot. In this way, by calculating the maximum permissible sampling control period, communication and computing resources can be saved while ensuring stable system operation.

An immersion probe (1) for the quantitative and / or qualitative analysis of a fluid (F), e.g., a liquid or a gas, using light which is guided through the fluid (F) along a light path (L), comprising a measuring head (10) suitable for immersion in the fluid, having an input light guide (14) for the light guided to the fluid (F), which input light guide can be connected to a light source, and an output light guide (15) for the light guided out of the fluid (F), which output light guide can be connected to a detector, a first and a second optical window, the mutually facing faces of which are in contact with the fluid, and at least one light deflection device (17, 18), which is arranged in the light path of the light exiting the input light guide (14) and entering the output light guide (15) and deflects the light coming from the input light guide (14) through the first optical window into the fluid and deflects the light coming from the fluid to the output light guide (15). The immersion probe is characterized in that the first and the second optical window (20, 21) are arranged with respect to each other in a wedge shape, and their surfaces (20a, 21a) pointing toward the interior of the V face the fluid (F) to be analyzed, the at least one light deflection device (17, 18) and the optical windows (20, 21) being able to move back and forth relative to each other substantially in the direction of the opening of the V.

The application discloses a method for simultaneously detecting 18 kinds of amino acids in Daqu based on high-resolution liquid chromatography-mass spectrometry, and belongs to the technical field of liquor detection. Chromatographic conditions of the method include that an ethylene bridge hybrid particle with surface-bonded amide groups is used as a filler, ammonium acetate-formic acid aqueous solution is used as mobile phase A, and acetonitrile is used as mobile phase B for gradient elution; mass spectrometry conditions include that an H-ESI ion source is used, the spray voltage in the positive ion mode is 3000-4000 V, and the spray voltage in the negative ion mode is 2000-3000 V; qualitative analysis is performed according to mass-to-charge ratios of the 18 kinds of amino acids, and quantitative analysis is performed by using a standard curve method. The method has the characteristics of simple pretreatment operation, easy-to-obtain reagents, high extraction efficiency and good stability, can realize synchronous and accurate qualitative and quantitative analysis of the 18 kinds of amino acids, and provides reliable data support for flavor substance research of Daqu.

The application relates to a method for designing leakage inductance and suppressing transformer impulse current by using the leakage inductance, characterized in that the method comprises the following steps: obtaining a four-dimensional feasible region of a transformer capacity arc set S and a transformer leakage inductance set by four-dimensional visualization processing respectively L lp ; obtaining a fitted B-H curve according to actual test data of a core, and converting the B-H curve into a I curve; physically modeling a no-load transformer considering the leakage inductance, and establishing a mathematical model, and solving the mathematical model to obtain a magnetic flux expression considering the leakage inductance; combining the magnetic flux expression considering the leakage inductance and the I curve, and calculating the impulse current considering the leakage inductance i , and calculating the current of multiple periods to obtain a waveform of the impulse current. The application designs the leakage inductance by using a four-dimensional visualization method, and quantitatively calculates the impulse current considering the influence of the leakage inductance on the basis of traditional qualitative analysis of the impulse current, so that the impulse current at the power-on moment of the transformer is reduced.

The present application belongs to the field of chemical detection and analysis, and particularly relates to a quantitative analysis method of tire surface spray substances. The quantitative analysis method of tire surface spray substances comprises the following steps: S1. establishing a standard curve; S2. pretreating a to-be-tested sample; S3. qualitatively analyzing the to-be-tested sample; S4. calculating the concentration of 6PPD in the to-be-tested sample; and S5. quantitatively analyzing each component of the to-be-tested sample. The present application provides a reasonable and rapid quantitative analysis method of tire surface spray substances, which can more effectively qualitatively and quantitatively analyze tire surface spray substances, provide basic data basis for optimizing a formula and adjusting a process, save unnecessary multiple formula and process adjustment tests, and improve experimental efficiency.

The application discloses a detection method for separating diglyceride in vegetable oil and qualitative analysis of the diglyceride, and the diglyceride in the vegetable oil is dissolved by using n-hexane to obtain a sample for standby; different proportion eluent is used to wash and elute a solid phase extraction column, and eluent is collected and dried for standby to obtain eluate; the eluate is analyzed and quantified by using a thin layer chromatography and gas chromatography, and finally, the eluate is finely qualitatively analyzed by using a triple quadrupole; the separation method is simple, the separation of the diglyceride in the vegetable oil can be realized by using two extraction cartridges, the test steps are simplified, the separation purity is high, the cost and time are reduced; finally, qualitative analysis is performed by using GC-MS, the analysis time is short, the specific fatty acid composition in the diglyceride is more finely analyzed, and the qualitative analysis detection of food nutrition and the guidance of related food production are facilitated.

This invention belongs to the field of modern analytical technology of traditional Chinese medicine, specifically involving a method for detecting chemical components of bitter vine based on UPLC-Q-TOF-MS / MS. This invention is the first to systematically and rapidly perform qualitative analysis on the chemical components of bitter vine, a Dai medicinal herb, identifying a total of 96 compounds, including saponins, phenylpropanoids, flavonoids, terpenes, and organic acids. This provides a scientific basis and data support for elucidating the pharmacodynamic material basis, quality control, and subsequent formulation development of bitter vine.

This invention proposes a product cost prediction method, system, and electronic device using a multi-mode interpolation strategy, relating to the field of data processing technology. The method includes acquiring product cost data to be predicted; determining whether missing values ​​exist in the product cost data; if missing values ​​exist, judging the significance of the trend and seasonality of the cost data based on set rules, and dynamically interpolating for each case to obtain the interpolation result corresponding to the missing value; and inserting the interpolation result into the corresponding position in the cost data to be predicted, thereby achieving product cost prediction. This invention performs qualitative analysis of the trend and seasonality of the cost data to be predicted, classifies cases according to the significance of the trend and seasonality, and automatically assigns different interpolation models to form interpolated data. This ensures that the exponential smoothing algorithm remains usable even when the time series is interrupted, and guarantees prediction accuracy.

This invention relates to the field of compound analysis and detection, and more specifically to a method for detecting NMP in soil. The method includes sample pretreatment, extraction, purification, concentration, and LC-MS / MS detection: soil samples are purified, coarsely separated using a quartering method, freeze-dried for dehydration, ground, sieved, and homogenized; extracted with deionized water, the supernatant is collected by low-speed shaking and high-speed centrifugation; purified using an HLB solid-phase extraction column activated with methanol and water, concentrated and diluted to volume with nitrogen blowing before detection. Chromatography uses a C18 column with a trapping column, eluted with formic acid-water and formic acid-acetonitrile gradients; mass spectrometry uses electrospray ionization in positive ion mode with multiple reaction monitoring, using a precursor ion of 100, a quantitative product ion of 58.1, and a qualitative product ion of 69.1 for qualitative and quantitative analysis. This method avoids target analyte loss, reduces matrix interference and background contamination, has high sensitivity, accurate qualitative analysis, and stable recovery rate (98.9% spiked recovery), filling the gap in domestic methods for the dedicated detection of NMP in soil, and is suitable for site investigations and environmental monitoring.

This application discloses a method for determining the fermentation degree of Bozhou chrysanthemum glutinous rice wine based on volatile components, relating to the field of alcoholic beverage fermentation detection technology. The method includes: S1. Sample preparation: 2 mL of Bozhou chrysanthemum glutinous rice wine sample is placed in a 20 mL headspace vial, 10 µL of 100 ppm 2-octanol internal standard solution is added, and the vial is sealed and incubated at 60°C for 15 min. Three parallel samples are set up for each sample; S2. Headspace sampling; S3. GC-IMS combined detection; S4. Data processing and qualitative analysis; S5. Multidimensional analysis of volatile components; S6. Screening of characteristic volatile components; S7. Determination of fermentation degree. This method for determining the fermentation degree of Bozhou chrysanthemum glutinous rice wine based on volatile components applies GC-IMS technology to the determination of the fermentation degree of Bozhou chrysanthemum glutinous rice wine. The detection process is carried out at room temperature, which can truly reflect the actual flavor components in the sample. Furthermore, it eliminates the need for sample enrichment and concentration; liquid samples can be directly detected via headspace sampling, saving time and effort and achieving high detection efficiency.

This invention discloses a method for in-situ detection of NO2 free radicals during the catalytic decomposition reaction of hydroxylamine nitrate, comprising three steps: reaction system construction, in-situ catalysis-capture, and analytical detection. Specifically: Step 1, reaction system construction: mixing a catalyst, an aqueous solution of hydroxylamine nitrate, and an electron-rich compound to form a reaction system; Step 2, in-situ catalysis-capture: placing the reaction system constructed in Step 1 under normal pressure and reacting within a temperature range of 20-100℃, allowing hydroxylamine nitrate to decompose under the action of a catalyst to generate NO2 free radicals, while the NO2 free radicals react with the electron-rich compound to generate nitro compounds; Step 3, analytical detection: qualitative analysis of the nitro compounds generated in Step 2 is performed using nuclear magnetic resonance spectroscopy, and quantitative determination is performed using a chromatographic instrument.

This invention relates to the field of seismic exploration technology and discloses an integrated quality monitoring method, device, equipment, and medium for processing and interpretation. The method includes: processing pre-stack seismic data; extracting common reflection point gathers near wells and synthetic pre-stack gathers from forward modeling based on the seismic data obtained in each processing step; qualitatively analyzing the energy distribution of the same phase axis in the lateral direction of the two gathers, extracting the amplitude characteristics of the two gathers, and determining whether the amplitude changes of the two gathers are consistent; if the amplitude changes of the two gathers are consistent, statistically reading the amplitude values ​​of the two gathers on the target layer, and plotting the amplitude value intersection diagram of the two gathers on the target layer; and determining whether the amplitude energy of the two gathers is consistent based on the amplitude value intersection diagram. This solves the problem of objective and standardized quality monitoring during seismic data processing.

This invention relates to the field of oil and gas reservoir geological exploration technology, specifically a method for identifying multiple fracture stages in buried hill oil and gas reservoirs based on tectonic stress field evolution. The method includes the following steps: Tectonic evolution history analysis step: Geological data of the target buried hill oil and gas reservoir area are systematically collected. Based on seismic profiles, stratigraphic contact relationships, tectonic deformation characteristics, and chronological data, a comprehensive analysis is conducted to construct a multi-stage tectonic evolution history of the area from the Paleozoic to the Cenozoic, accurately determining the geological age and tectonic nature of each key tectonic event. Compared to existing technologies, this application establishes a quantitative discrimination model based on mechanical principles through paleostress field numerical simulation and quantitative prediction of theoretical fracture parameters. This standardizes and quantifies the fracture stage identification process, significantly reducing the uncertainty caused by human factors, improving the objectivity and repeatability of the discrimination results, and achieving a leap from qualitative analysis to quantitative discrimination.

The application discloses a characteristic spectrum construction method of Fumai tablets and application of the method in a quality control method. The application provides the characteristic spectrum construction method of the Fumai tablets, which comprises the following steps: preparing a Fumai tablet test sample solution: weighing Fumai tablet extract, adding a methanol-water solution, ultrasonic extraction, centrifugation, taking supernatant, filtration, and obtaining the test sample solution; detecting the test sample solution by using an ultra-high performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometer, and collecting a total ion current chromatogram; performing peak extraction, peak alignment and peak correction on the total ion current chromatogram, and establishing a characteristic spectrum of the Fumai tablets. The characteristic spectrum construction method effectively solves the blank problem of the current quality evaluation method of the Fumai tablets, and as one of core technologies for quality evaluation of the Fumai tablets, realizes precise control of the quality of the Fumai tablets from four dimensions of characteristics, identification, inspection and qualitative analysis, and provides data support for establishment and application of the quality standard of the Fumai tablets.

1. The name of the design product: infrared spectrometer (HIR680). 2. The use of the design product: for infrared spectrum qualitative analysis. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

This invention relates to the field of anthocyanin detection technology, specifically to a database of six anthocyanin ion pairs and its establishment method, and a method for identifying six anthocyanins in blueberries based on this database. Under ultra-high performance liquid chromatography / high resolution tandem mass spectrometry (UHPLC / HDMS) conditions, this invention collects the precise mass-to-charge ratios of the precursor ions of the six anthocyanins and the precise mass-to-charge ratios of all their corresponding product ions; using MS-FINDER software, it derives the possible chemical structures of the product ions; finally, it derives the determined chemical structures of the product ions according to DFT density functional theory, ultimately establishing a database of six anthocyanins ion pairs. The identification method of this invention is simple, mainly using ring-fracture ion pairs for judgment. Each of the six anthocyanins has different complementary ion pairs, which can be used for qualitative analysis. The ion pair database of this invention can serve as a basis for non-targeted detection, optimizing the detection steps, improving detection efficiency, and exhibiting high accuracy and sensitivity.

This invention belongs to the field of geological disaster prevention and control technology, and discloses a method for assessing reservoir bank geological disaster risk based on the interaction between landslide movement and surge propagation. The method includes acquiring geological data of the target reservoir bank, quantitatively calculating the stability of the reservoir bank using the Morgensstein-Platz method to obtain a first stability assessment result; quantitatively calculating the surge risk of the reservoir bank using the Pan Jiazheng method based on the geological data to obtain a first surge prediction result; and finally, obtaining the reservoir bank geological disaster risk assessment result. This invention establishes a risk-oriented hierarchical standard, constructs a multi-level stability evaluation system, and comprehensively utilizes qualitative analysis of geological conditions, quantitative calculation of rigid body limit equilibrium, and three-dimensional numerical simulation analysis, significantly improving the reliability of the evaluation results. It realizes the integrated coupled simulation of landslide movement and surge propagation, forming a complete technical closed loop for the reservoir bank geological disaster risk assessment method.

The application provides a wind turbine coupling modeling and clustering analysis method for a multi-disturbance scene, and belongs to the technical field of offshore wind farm stability analysis, and solves the technical problem of lacking quantitative analysis of dynamic response modeling and power grid coupling relationship of the wind turbine under the multi-disturbance scene. The technical scheme comprises the following steps: S1, constructing an electromagnetic-mechanical hybrid model containing a direct-drive unit converter control loop; S2, based on the electromagnetic-mechanical hybrid model of the direct-drive unit converter control loop; S3, adopting a grouping aggregation algorithm based on disturbance energy integration; and S4, based on the clustering result. The application has the beneficial effect of improving the precision of wind farm modeling, facilitating the subsequent deployment of partition control and the design of key cluster priority regulation strategies, and providing a new modeling method and analysis tool for the safe and stable operation of a large-scale wind power grid-connected system.

The application discloses a design optimization method of a turbine disc coupling structure based on confirmed reliability, and belongs to the technical field of structural part design optimization.The design optimization method of the application identifies key positions, performance parameters and failure mechanisms through qualitative analysis; constructs a subject cross equation, establishes mapping of internal cause variables and external cause variables to stress and strain; constructs a performance degradation model based on low-cycle fatigue, creep and coupling effects, and obtains total damage of a single task; further constructs a performance margin degradation model, quantifies internal and external cause uncertainties and establishes a confirmed reliability function.On this basis, parameter sensitivity analysis is carried out, sensitive design parameters are identified, and optimization design is carried out with reliability as the center.From the perspective of reliability, the application comprehensively considers performance margin degradation and multi-source uncertainty, can quickly and accurately identify key design parameters, realizes forward optimization design of the structure, and effectively improves the reliability and life of the turbine disc coupling structure under complex working conditions.

This invention discloses a method for detecting disinfection byproducts in drinking water. By combining gas chromatography-triple quadrupole dynamic multiple reaction monitoring, ion pair information and standard curves containing disinfection byproduct standards are established. The extracted sample solution is tested under the same test conditions, enabling simultaneous extraction and quantitative and qualitative analysis of 34 disinfection byproducts in the sample. The byproducts detected simultaneously include five categories of substances: trihalomethanes, halonitromethanes, haloaldehydes, haloketones, and haloacetonitrs. This greatly increases the variety of disinfection byproducts that can be detected simultaneously and improves the detection efficiency.

The application discloses a method for identifying and detecting carotenoids based on potential regulation SERS, which comprises the following steps: preparing a carbon-based microelectrode, preparing a nano-silver particle modified SERS active microelectrode, constructing a carotenoid detection system, qualitatively analyzing carotenoids, and quantitatively analyzing carotenoids. The application provides a method for screening different carotenoids by potential regulation, realizes rapid enrichment of fat-soluble carotenoids which are not easy to be adsorbed on a SERS active substrate, enhances the sensitivity of SERS detection of carotenoids, is simple to operate, low in cost, and is a new method and new technology urgently needed for food safety analysis and detection.

This invention discloses a radioactive triazolidinedimethylpyrimidine derivative, its preparation method, and its applications. The derivative has the structure shown in Formula I. Compared with the prior art, this invention provides a class of high-affinity adenosine A derivatives. 2A Radioactive triazolidinedimethyl derivatives of the receptor. This class of compounds belongs to the diagnostic category A. 2A Novel compounds for receptor-related diseases, and derivatives thereof prepared to target A 2A Imaging of the receptor, compared with previously reported targeting of A 2A Compared to receptor-specific radiopharmaceuticals, the radioactive compounds of this invention can rapidly reach equilibrium in the brain, thereby facilitating A. 2A Rapid quantification and qualitative analysis of receptors. The compounds of this invention can be applied not only to A... 2A The diagnosis of receptor-related brain diseases can also be applied to A 2A Diagnosis and efficacy evaluation of tumors with high receptor expression.

This invention discloses a qualitative and quantitative analysis method for heparin-like components in the biopharmaceutical field. The method includes using a liquid chromatograph, an SAX strong anion exchange column, sodium dihydrogen phosphate solution as mobile phase A, and mobile phase B consisting of mobile phase A containing sodium perchlorate, with gradient elution for monitoring and analysis. This invention improves the separation of heparin-like components by screening chromatographic packing materials, optimizing the chromatographic method, and optimizing the detection wavelength. It allows for accurate qualitative analysis of up to five heparin components using a simple liquid chromatography method. Furthermore, this invention incorporates the simulated separation function of the Glycomapping glycosylation software to reconstruct the elution peaks of components that do not reach baseline separation, and then achieves quantitative analysis of each separated component based on the external standard method. This qualitative and quantitative analysis method provides a feasible solution for component identification and content determination in heparin-like samples, and offers an important means for heparin quality control.

This invention discloses a dynamic risk assessment method and system for storage tanks, comprising the following steps: S1, identifying potential risk sources of the storage tank, taking tank leakage as the assessment object; S2, inputting the potential risk sources and their possible consequences into a fuzzy Bow-Tie model to form a preliminary qualitative analysis of consequences and measures; S3, transforming the Bow-Tie model into a Bayesian network based on mapping relationships; S4, having experts score the corresponding risk sources and converting the scores into prior probabilities of the root nodes of the Bayesian network, determining the weights of each expert using the analytic hierarchy process (AHP), and converting the expert evaluation results into fuzzy probabilities to obtain the prior probabilities of the root nodes and determine the conditional probability tables of other nodes; S5, calculating the posterior probabilities and analyzing and determining the priority relationships of failure modes; S6, providing corresponding risk control measures based on the priority judgment results. This method realizes management from risk source identification to control measure output, overcoming the problem that traditional methods cannot cope with complex dynamic environments.

The present application belongs to the technical field of separation and analysis chemistry, and particularly relates to a mass spectrometric qualitative analysis method for iridoid glycoside isomers. The steps of the method are as follows: the sample is first extracted and separated by liquid chromatography, the separated sample is subjected to secondary mass spectrometric analysis under negative ion and positive ion modes under gradient collision energy, collision-induced dissociation is performed on the target parent ion, and secondary mass spectrometric spectra under various collision energies are collected; characteristic ions are screened, and isomers are identified by comparing the relative abundance differences of the characteristic ions between different isomers. The present application compares and analyzes the MS / MS cracking rules of iridoid glycoside isomers by LC-QTOF-MS / MS system, and the differences in cracking characteristics are determined by the relative intensity differences of multiple fragment ions under positive and negative modes under gradient collision, thereby improving the accuracy of isomer identification.