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92results about How to "Fast identification" patented technology

White spirit appraising and source-tracing method based on infrared spectroscopy

The invention discloses a white spirit appraising and source-tracing method based on infrared spectroscopy. The method comprises specific steps as follows: an infrared spectrometer is used for collecting infrared spectrums of a true spirit sample and an adulterated spirit sample ferreted by the police, and true-spirit infrared spectrum library and adulterated-spirit infrared spectrum library are established respectively; a least squares support vector machine is used for establishing a hierarchical classification and appraisal model for the established true-spirit infrared spectrum library and establishing an adulterated spirit den source-tracing model for the established adulterated-spirit infrared spectrum library respectively; and the infrared spectrum of to-be-detected white spirit is collected, classified and appraised with the established hierarchical classification and appraisal model and the adulterated spirit den source-tracing model, and appraising and source-tracing of the to-be-tested white spirit are achieved through comprehensive analysis of a result. The white spirit appraising and source-tracing method based on infrared spectroscopy has the advantages that the appraising speed is high, and the appraising accuracy is high; and classification and appraisal models of the true spirit library and the adulterated spirit library are combined, and the analysis result is more detailed.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for quantitatively analyzing components in white spirit

The invention belongs to a white spirit analysis method and discloses a method for quantitatively analyzing components in white spirit by utilizing an infrared spectrum and combining with data processing, aiming at solving the defects in a conventional white spirit analysis method that a sample need to be pretreated before test, the measurement time is long, rapid field detection cannot be performed and the test price is high. The method comprises the following steps: selecting an instrument Nicolet Nexus 670 and an attenuated total reflection accessory; selecting Agilent 7890-5975c gas chromatograph-mass spectrometer; setting parameters of an infrared spectrometer; detecting the infrared spectrum of the sample; preparing standard working curve solutions of different concentrations to obtain multiple groups of working curves; measuring the chromatograph of the sample; solving the content of each substance by utilizing the working curves, and recording the substance content information serving as the characteristic as C=[c1, c2,...cn]; and comparing the detection result to identify the white spirit. The method has the advantages that the identification accuracy rate is high; the identification speed is high; the fake liquor dens can be traced, and manpower and material resources of supervision departments are saved.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for identifying Pingli fiveleaf gynostemma herb through near infrared spectroscopy

The invention provides a method for identifying Pingli fiveleaf gynostemma herb through near infrared spectroscopy, which comprises the following steps: (A) establishing a near infrared spectroscopy identifying model of Pingli fiveleaf gynostemma herb: (A-1) selecting the spectral range of 4,000-12,500cm<-1>, and scanning the near infrared spectrogram of the Pingli fiveleaf gynostemma herb; (A-2) pretreating the data of the spectral range of 4,000-9,500cm<-1>; (A-3) extracting the main components; and (A-4) establishing an artificial neutral network model: determining the structure of the neutral network by an artificial neutral network algorithm according to the characteristics of the input and output data, and training the neutral network by use of the training data; and establishing a BP artificial neutral network model of input layer nodes 10-, hidden layer nodes 5- and output layer nodes 2 by use of the MATLAB software; and (B) identifying the unknown sample: scanning the near infrared spectrogram of the unknown sample under the same conditions, selecting the number of main components, judging the authenticity of the unknown sample according to the trained neutral network model, and representing the output nodes with binary codes respectively, wherein 10 represents Pingli fiveleaf gynostemma herb, and 01 represents non-Pingli fiveleaf gynostemma herb.
Owner:HEBEI UNIVERSITY

Odor recognition method and device based on electronic nose and electronic nose system

The invention relates to an odor recognition method and device based on an electronic nose and an electronic nose system. The odor recognition method based on the electronic nose comprises the following steps: obtaining detection data of a plurality of odor samples collected by the electronic nose system; decomposing the detection data of each odor sample, so as to obtain an adsorption mass matrixof each odor sample, an adsorption amount scaling matrix of odor molecules of each odor sample on each sensor in the electronic nose system and an odor molecule characteristic matrix; constructing anabstract odor factor diagram of each odor sample separately according to the adsorption mass matrix, adsorption amount scaling matrix and odor molecule characteristic matrix of each odor sample; calculating similarity between abstract odor factor diagrams of two odor samples; and recognizing whether two odor samples are the same odor sample or not according to the similarity between abstract odorfactor diagrams of two odor samples. The odor recognition method based on the electronic nose has the advantages of simple pretreatment, short detection period and low detection cost, and can realizehigh-accuracy identification of different odor samples with high similarity and complexity.
Owner:SUN YAT SEN UNIV

Method utilizing environmental sediment samples to monitor freshwater benthic animals

PendingCN111593099AGuaranteed uniformityOvercome the defect of low accuracy of monitoring resultsMicrobiological testing/measurementCentrifugationFishery
The invention belongs to the technical field of benthic animal identification, and discloses a method utilizing environmental sediment samples to monitor freshwater benthic animals. The method includes the following steps: 1) collecting an environmental sediment sample to preserve after cleaning; 2) adding anhydrous ethanol in the preserved environmental sediment sample to perform extraction treatment, taking uniformly mixed extract liquid after treating for a period of time, performing vacuum centrifugation on the extract liquid, and discarding supernatant to obtain dried tissue residues so as to perform DNA extraction; 3) utilizing the extracted DNA barcode fragment to perform amplification so as to obtain an amplified product; and 4) sequencing and analyzing the amplified product. The method performs extraction on the sample by adopting the anhydrous ethanol so as to make the DNA of a benthic animal uniformly released in the solution, so that a homogeneous state can be achieved; andthrough the collection of the ethanol solution containing the DNA sample and the extraction of the DNA after centrifugal concentration, the accurate monitoring of a wide range of environmental samples can be realized.
Owner:南京易基诺环保科技有限公司

Identification method of tree species of wood and material of each part of wood product

The invention discloses a molecular identification method of a tree species of a wood and a material of each part of a wood product. The method comprises: if it is judged that all of a cross section, a longitudinal section, and a peeled section of a to-be-identified wood or a material of a part of a wood product achieve a set smoothness standard, obtaining microscopic characteristic information of the wood or the material of the part of the wood product at a cellular level and a molecular level from the cross section, the longitudinal section, and the peeled section; and comparing the obtained microscopic characteristic information at a cellular level and a molecular level with microscopic characteristic information of known tree species at a cellular level and a molecular level to determine the tree species of the wood or the material of the part of the wood product. Based on the comparison of microscopic characteristic information at a cellular level of the to-be-identified wood or the material of the part of the wood product with that of known tree species, a comparison method of microscopic characteristic information at a molecular level is added, so that the tree species of the wood or the material of each part of the wood product can be accurately identified.
Owner:张树林

Method for fast separating, identifying and storing sweet potato sclerotium rolfsii

The invention discloses a method for fast separating, identifying and storing sweet potato sclerotium rolfsii.The method comprises the following steps that 1, a PDA medium plate is inoculated with hyphae or sclerotia selected from a disease sample of the sweet potato sclerotium rolfsii and placed at the temperature of 20 DEG C to 30 DEG C for culture; 2, after new hyphae grow out of the PDA medium plate, new hyphae are selected and placed on a new PDA medium plate for purifying culture; 3, after purified strains are cultured for 2 d to 4 d at the temperature of 20 DEG C to 40 DEG C, a healthy sweet potato stem branch is inoculated with hypha blocks as inocula, PDA blocks are adopted as blank control, culture is carried out for 1-3 days under the sealing condition at the temperature of 20 DEG C to 30 DEG C, and when the phenomenon that the stem branch rots occurs, the sweet potato sclerotium rolfsii is confirmed; 4, sclerotium culture is carried out on the sweet potato sclerotium rolfsii, and then sclerotia are dried and stored.According to the method, the process of fast separating, identifying and storing the strains of the sweet potato sclerotium rolfsii can be simple, the workload is small, efficiency is high, and the preserved strains are easy to manage and long in survival time and can survive for 4 years or longer.
Owner:CROP RES INST GUANGDONG ACAD OF AGRI SCI

Rock slice intelligent identification device and method

The invention discloses an intelligent identification device and method for a rock slice, and the device comprises microscopic image collection equipment which collects a rock microscopic image of the rock slice; mineral measurement imaging equipment which is used for acquiring a mineral fingerprint image of the rock slice; and an image processing system which is connected with the microscopic image acquisition equipment and the mineral measurement imaging equipment, and is used for identifying the rock slice based on the rock microscopic image and the mineral fingerprint image. According to the intelligent identification device for the rock slice, the method comprises the steps: acquiring the rock microscopic image through the microscopic image acquisition equipment, acquiring the mineral fingerprint image through the mineral measurement imaging equipment, digitally synthesizing the rock microscopic image and the mineral fingerprint image through the image processing system, and identifying the rock slice; and finally, outputting a rock slice identification report, so that intelligent and automatic identification of the rock slice is realized, the influence of subjective factors of manual identification is avoided, the identification accuracy is high, and the identification speed is high.
Owner:CHINA PETROLEUM & CHEM CORP +1
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