33results about How to "Large sample size" patented technology

The invention provides a public transport card passenger commuter OD (origin and destination) distribution estimation method based on APTS (advanced public transportation systems). The method includes collecting APTS data, obtaining station information where public transport passengers getting on according to association between public transport IC (intelligent card) data and intelligent scheduling system data, judging public transport commuters according to travel frequency of morning and evening peaks, and determining places of residence and places of work according to time and space characteristics of commuter traveling. The public transport card passenger commuter OD distribution estimation method has the advantages of high accuracy and strong operability, a novel manner for obtaining public transport commuter OD distribution rapidly and economically is provided, ratio of the commuters traveling by public transport can be increased, and the urban traffic congestion problem can be relived effectively.

The invention provides a traffic trajectory extraction method and device based on e-police data. Preprocessed point location data and e-police data of e-police equipment is obtained, travel paths of a vehicle are extracted according to the preprocessed point location data and e-police data of the e-police equipment, the travel paths of the vehicle are classified according to the driving speed of the vehicle and travel time of the travel paths, and a traffic trajectory of the vehicle is determined according to the classified travel paths of the vehicle. According to embodiments of the invention, the traffic trajectory of the vehicle is extracted on the basis of the point location data and e-police data of the e-police equipment, a data source is single, the amount of sample is large, and a traffic trajectory extraction method is simplified. The travel paths of the vehicle are classified after being extracted, different traffic trajectory determining methods are used for different types of travel paths, the obtained traffic trajectory satisfies a practical travel scene more, and the traffic trajectory extracting precision is improved.

The invention discloses an automatic sampler of undisturbed sediment deposits, and relates to the environment analysis technology. The automatic sampler comprises a power supply part, a cylinder body part, a sampling head, and a seal part. After the automatic sampler enters sediment deposits, a pressure switch is closed by the extrusion between the power supply housing and the sampling cylinder fixed part, and a deceleration motor is started to drive the sampling cylinder and a stainless steel knife edge to rotate and sampling; when the distance between the power supply housing and an annular gravity hammer reaches the detection range of a proximity switch sensor, the sampling is stopped; during the lifting process of the sampler, a rubber diaphragm seals the lower part of the sampling cylinder. The automatic sampler of undisturbed sediment deposits of the invention is specially applicable to undisturbed sampling devices for sediment deposits of rivers, lakes, and neritic regions, and has an obvious advantage for environment with a relatively hard deposition layer; and the invention allows a quick and effective sampling to deposits, and realizes an effective analysis to deposit samples.

The invention discloses a multi-visual angle-based interactive video searching method, belonging to the field of video searching technique. And the invention applies multi-visual angle technique to interactive video searching. And the invention constructs a new arranging function from multiple independent visual angles in a semi-supervised learning mode and its advantage: it only needs very few label samples to be able to start a learning course and iteratively increases sample capacity from multiple visual angles and finally improves searching performance.

The invention discloses active dendrobe polysaccharide capable of protecting liver and resisting liver fibrosis, whose chemical structural formula is seen in the figure. The active dendrobe polysaccharide is gala glucomannan taking glucose and mannose as a main chain and galactose as a branch, the molecular weight of the gala glucomannan is about 2.2*104dalton, and the mole ratio of glucose to mannose to galactose in the composition is 31:10:8. The invention further discloses extraction, separation and purification methods of the active dendrobe polysaccharide as well as the preparation method of antibody affinity chromatography of the active dendrobe polysaccharide. The active dendrobe polysaccharide prepared by the method has remarkable physiological activity of protecting liver and resisting liver fibrosis and can be used for preparing liver-protecting health care products and medicines for curing liver fibrosis.

The invention discloses a large-scale in-situ triaxial shearing test device and a method thereof, which belong to the technique of testing mechanical properties of soil in the field of geotechnical engineering. The device includes a sample (10), a confining pressure system (20), a vertical pressure system (30), a reaction force system (40) and an automatic data acquisition system (50); For the sample (10), the vertical pressure system (30) and the reaction force system (40) are respectively set above and below the confining pressure system (20), and the vertical displacement meter of the automatic data acquisition system (50) is set on the sample ( 10) Inside. Compared with the prior art, the present invention can maintain the original structure of the sample; can apply confining pressure to the sample to reproduce the in-situ stress field of the measured soil; can destroy the soil along its weakest surface; the sample size is large , to reduce the size effect. The invention has the characteristics of being true and comprehensive in studying the shear strength of the soil, and the test data is reliable, which can provide a strong guarantee for the design and construction in the field of geotechnical engineering.

The invention relates to a large-scale real triaxial shear testing device and an application thereof. The testing device comprises a testing box, a hydraulic pressurization mechanism and a water pressure pressurization mechanism, wherein the testing box comprises a box frame, a shear box and a soil pocket; the hydraulic pressurization mechanism comprises a hydraulic control box, a vertical hydraulic cylinder, a horizontal hydraulic cylinder and a shear testing hydraulic cylinder; the water pressure pressurization mechanism comprises a water box, a gas pressure tank and a water pressure pocket; the hydraulic control box is used for controlling the pressure of the vertical hydraulic cylinder and the horizontal hydraulic cylinder, the gas pressure tank is used for controlling the pressure of the water pressure pocket and enabling a test sample in the soil pocket to be in a three-dimensional stress state, shear testing is performed on the test sample through the shear testing hydraulic cylinder, whether the test sample has drainage or not is controlled through a drainage valve, and the changes in displacement over time and the changes of pressure applied in each direction over the time are recorded when the test sample is sheared. Compared with the prior art, the large-scale real triaxial shear testing device provided by the invention has the characteristics that the size of the test sample is large, a shear surface is not a traditional fixed horizontal plane, the large-scale real triaxial shear testing device can be used for shear testing of soil in a three-dimensional stress state, and parameters of a soil layer can be determined more accurately.

The invention discloses an Elisa agent for detecting malachite green and a method thereof. The Elisa agent comprises a malachite green antigen or antibody coated Elisa plate, an enzyme label, a malachite green specific antibody, a malachite green standard solution, a substrate developing solution, a stop solution, a concentrated cleaning solution, enzyme label diluents and a concentrated combined solution. The Elisa agent is used for the quantitative detection of the content of the malachite green in fishes, shrimps and water samples and has the advantages of high specificity and sensitivity, easy sample pretreatment, short detection time, large sample detection amount, and the like.

The invention relates to a grain sample splitter, which comprises a hopper, a box, a multi-stage sample splitting system and sample cases, wherein the hopper is arranged above the box; the top of the box is provided with an injection port opposite to a lower outlet of the hopper; the multi-stage sample splitting system is arranged in the box, and is provided with a plurality of sample splitting discharge holes; and a sample case for collecting split samples is arranged below each sample splitting discharge hole. The grain sample splitter has simple structure, large sample splitting quantity and high efficiency, can quickly mix the samples uniformly, and can split a large number of samples in different ratios at one time to obtain representative samples in different splitting ratios at onetime; the one-time maximum sample splitting quantity is only limited to the size of the sample cases; and the grain sample splitter is easy, convenient and quick to operate, and can meet the requirements of inspection, massive sample preparation and the like.

The invention provides a power consumer information tagging method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining three-phase electric meter data ofa user; clustering the three-phase electric meter data to obtain a typical load curve picture; classifying the typical load curve pictures by using a pre-trained VGG model to obtain power utilizationcharacteristic feature tags of the users; combining K-means clustering and a deep convolutional neural network to be used for power consumer information tagging, and obtaining a power consumer behavior portrait. The implementation difficulty is small, the sample size is large, all typical users can be covered, and the accuracy is high.

The invention provides a traffic jam tracing method based on multi-source data. The method comprises a map matching algorithm (AVI-MM) based on the multi-source data and a multi-level traffic jam tracing algorithm. The AVI-MM algorithm fuses sparse AVI data and massive GPS data, firstly, a vehicle path candidate set is generated based on a random walk algorithm, then, a prior probability is determined based on a Logit path selection model with the maximum utility, a conditional probability is defined through space-time fusion analysis, and finally, sub-paths with the maximum matching probability are communicated in sequence to obtain a final full path; the multi-level traffic jam traceability algorithm is based on a map matching result, and multi-level vehicle track OD distribution of road sections, nodes and areas is calculated respectively. According to the method, high-precision matching of the quasi-full-sample vehicle track and the driving path is realized, and based on the path matching result of the quasi-full-sample AVI data, the origin-destination distribution and the path distribution of the traffic flow of the congested road section are quantitatively analyzed.

The invention discloses a caenorhabditis elegans drunkenness model creation method for rapidly screening alcohol-effect-dispelling plants. The caenorhabditis elegans drunkenness model creation methodincludes taking wild caenorhabditis elegans as a base, and cultivating the caenorhabditis elegans in liquid until the content reaches 2000-2500 worm/mL; after the caenorhabditis elegans just grows into the adulthood, adding an alcoholic solution into the worm liquid until the final concentration of the alcoholic solution reaches 1-5%, and performing 24-hour intervention, wherein the caenorhabditiselegans is drunk at the moment. The method has the advantages that a model organism, namely the caenorhabditis elegans, which is convenient and easy to get, is adopted for evaluation, and accordingly, experiment cost can be reduced effectively; the growth cycle of the caenorhabditis elegans is short, and tens of thousands of the caenorhabditis elegans can be reproduced in a short time to be usedfor experiments, so that enough samples can be guaranteed, experiment errors can be reduced, and accuracy of evaluation results can be guaranteed; high-throughput screening experiments can be carriedout, experiment results can be acquired efficiently, and experiment cycle can be shortened greatly.

The present invention relates to high-abundance ¹⁵ Extraction of high-abundance L-arginine from N-isotope-labeled L-arginine fermentation broth ¹⁵ N ₄ approach to high-abundance ¹⁵ The fermentation broth of N isotope-labeled L-arginine is used as raw material, and a medium-pressure preparative chromatography system is used. After two-step separation, pure L-arginine can be obtained after 8-12 hours. ¹⁵ N ₄ The single-product solution is then concentrated by catching ammonia, decolorized by activated carbon, crystallized by absolute ethanol, and vacuum-dried at 60°C to separate and extract L-arginine- with a product purity > 98%. ¹⁵ N ₄ product, the total extraction yield is greater than 80%. The invention not only has simple principle, convenient operation, large and fast processing capacity, but also avoids the long extraction time of the ion exchange resin method and the environmental pollution caused by the discharge of a large amount of waste acid and alkali produced by resin treatment.

The invention relates to a preparation method of skimmin. The method comprises technical steps of: creeping dichondra complete herb is subjected to tissue breaking and extraction 3 times by using acetone; an extraction liquid is subjected to reduced-pressure concentration, such that an extraction paste is obtained; multi-stage countercurrent extraction is carried out by using an ethyl acetate-methanol mixed solvent with a ratio of 10:1; extraction liquids are combined; the solvent is subjected to reduced-pressure recovery; the obtained material is processed by using a polyamide resin column; an obtained elution liquid is concentrated, such that a crude product is obtained; the product is fed into a medium-pressure chromatography column with silica gel of 200-300 meshes; a methanol-dichloromethane mixed solvent system is adopted; elution liquids at target component fragments are collected; the elution liquid is filtered and concentrated, and is subjected to low-temperature drying, such that skimmin is obtained. The skimmin preparation method provided by the invention has the advantages of high product purity and suitability for industrialized enlargement.

The invention discloses a biopsy expander, which comprises an outer air bag, a spatula and a three-way tube, wherein an inner air bag is further arranged in the outer air bag, an inflatable tube is arranged on the outer air bag, and two cavities are arranged in the inflatable tube. One of the cavities is connected with the outer airbag and the spatula, the other cavity is connected with the inner airbag, and the inflatable tube is connected with the three-way tube. The inner airbag, the outer airbag, the spatula and the inflatable tube are integrated during manufacture. forming. The three-way pipe is provided with an outer airbag inflatable ball and an inner airbag inflatable ball, the outer airbag inflatable ball, the inner airbag inflatable ball and the three-way pipe are inserted and connected. The spatula is wrapped with a silica gel layer, and the silica gel layer is provided with a small cavity for containing secretions; the outer wall of the outer air bag and the spatula is further provided with some fluff, and the inner air bag, the outer air bag and the spatula are made of rubber. The invention has the advantages of simple structure, convenient use, time saving and labor saving, and a large amount of extracted samples.

The invention discloses a method for trapping low molecular volatile substances in polypropylene. The method comprises the following steps of: (1) thermally desorbing low molecular volatile substances in polypropylene; and (2) condensing and concentrating a carrier gas containing low molecular volatile substances in polypropylene. The method is suitable for trapping low molecular volatile substances in polypropylene industrially produced and analyzing the composition, and has guiding meaning for troubleshooting and control of smell sources in the production process of polypropylene.

The invention discloses a CMIP gene capable of being used as a molecular marker for distinguishing Dengue fever and Dengue hemorrhagic fever. By a high-throughput sequencing and RT-PCR method, the CMIP gene has significant expression difference in blood of normal people and patients with Dengue fever and Dengue hemorrhagic fever, i.e., whether a subject suffers the Dengue fever or the Dengue hemorrhagic fever can be judged by detecting the expression condition of the CMIP gene in the blood. According to the correlation of the Dengue fever and the Dengue hemorrhagic fever, the invention develops a kit for diagnosing the Dengue fever and the Dengue hemorrhagic fever. The kit is used for performing the Dengue fever and Dengue hemorrhagic fever diagnosis by detecting the CMIP gene expression.The diagnosis kit can be used for early diagnosis of diseases and has wide application prospects in clinics.

The invention discloses a method for establishing a pre-pregnancy TSH abnormal reference value, and relates to the technical field of maternal and child health care, and the method comprises the following steps: S1, grouping women subjected to pre-pregnancy TSH detection through a big data statistics mode; S2, performing preliminary grouping according to whether the examined women have the pregnancy history or not; S3, performing grouping according to the ages of the women to be examined, adopting cross grouping during age grouping, taking each age as one group, marking the age as n, taking the women of the age n-2, the age n-1, the age n, the age n + 1 and the age n + 2 as one group, and marking the group as an age N group; S4, performing grouping according to different posture characteristics of the examined persons; S5, performing grouping according to different physical conditions of the examinees on the same day. Under the coordination and cooperation effect of big data, samples are expanded as much as possible on the basis of crowds; through the pre-pregnancy detection system, the TSH values of the tested women are compared, an alarm is given for abnormal values, and guidance is provided for research of the pre-pregnancy TSH abnormal values.

The invention discloses a digestive tract mucosa biopsy sampling device, and relates to the field of medical appliances. The digestive tract mucosa biopsy sampling device comprises a sample extraction component and a handle, wherein the sample extraction component is made into a long rubber strip with the projected middle part and the two pointed ends; a plurality of tiny scraping spoons are distributed on the outer surface of the rubber strip; the sample extraction component is connected with the handle; the handle is made into a rotating shaft driven to rotate by a motor; a switch is arranged on the handle. The long rubber strip with the projected middle part and the two pointed ends is designed and used as a main body for extracting a sample; the scraping spoons are arranged on the outer surface; the sample extraction is more convenient; the quantity of extracted samples is great; injury cannot be caused on the respiratory tract of a patient; the rotatable handle is designed; the sample extraction process is completed after a switch is turned on and is fast rotated for one circle; the pain of the patient and the workload of medical care personnel are reduced.

The invention discloses a gene marker for early-stage cervical cancer screening as well as a product and application thereof, the gene marker is a combination of genes SPRR2B and CLU, verification finds that the gene marker has relatively good diagnostic efficiency, relatively high accuracy, sensitivity and specificity on cervical cancer, and in addition, the invention further provides a product for early screening of cervical cancer, and the product has important significance on early screening and early intervention treatment of cervical cancer and improvement of survival and living quality of patients.

The invention discloses application of a gene ARRDC1 in diagnosis of dengue fever and dengue hemorrhagic fever. The content of the gene ARRDC1 in the blood with dengue fever and dengue hemorrhagic fever is obviously different from the content of the gene ARRDC1 in the blood of a normal person; a patient with dengue fever and dengue hemorrhagic fever and the normal person can be distinguished according to the difference. The invention also discloses a product for diagnosing the dengue fever and dengue hemorrhagic fever. The diagnosing product can be used for diagnosing the dengue fever and dengue hemorrhagic fever by detecting the gene ARRDC1 in the blood.