56results about How to "Suitable for analysis" patented technology

The invention relates to a method and a system for carrying out transient and intermittent earth fault detection and direction determination in a three-phase medium-voltage distribution system comprising a plurality of circuits. The system comprises a sampling unit for sampling residual currents and residual voltages on the circuits, a transient direction detection unit based on the instantaneous power, a random intermittent detection unit based on the intermittent change of the magnitude of the residual current, an integrated transient direction detection and random intermittent detection unit, and an alarm unit for indicating the inspection of the status of a circuit.

The invention discloses a micro disperse pump which comprises a pump chamber, a one-way valve, a pump inlet, a pump outlet and a driving device inside the pump chamber; wherein, the one-way valve is between the pump chamber and the pump inlet, and between the pump chamber and the pump outlet; the one-way valve is a wedge disperse tube with different positive and passive fluxes; the fluid of pump chamber can be expanded and contracted to generate pressure difference, and according to the different pressures of positive and passive fluxes in the wedge disperse tube, to generate one-way continuous fluid transmission. The inventive micro disperse pump can drive fluid via adsorbing fluid or directly drive fluid. The production is based on silicon micro-mechanical processing technique and micro-mould technique, with simple process, lower cost, high reliability and the application for integrating other micro-fluid systems. It has wider application in the micro-fluid control analysis chip.

The invention relates to a method and a system for automatically calculating the evolutional trend of a topic on the internet. The prior art only can simply analyze the topic (or event) from a document in a centralization way, and give out the document information contained by the topic. In fact, each topic changes with the variation of the time, and the topic evolutes constantly on the time dimension. On the basis of the prior topic detection system, the invention periodically calculates the relation between the topic in the current period and the topic in the last period and stores the relations. The system takes out the relations between the topic information which is corresponded to a plurality of periods and the topics, and can visually display the evolutional trend of the topic over time at a client in a graphic mode according to the time range input by the user. By adopting the method of the invention, a more three-dimensional topic analysis result can be provided for the user, and the understanding and the recognition of the user to the topic are deepened, thereby helping the user to make a decision. The method is widely applicable to the intelligent information processing.

The invention relates to a method for simultaneously detecting a plurality of volatile trace carbonyl compounds in the atmosphere. According to the method, a pentafluorobenzyl hydroxylamine (PFBHA) derivative standard sample of 18 carbonyl compounds (16 mono-carbonyl compounds and 2 dicarbonyl compounds) with a certain concentration is prepared. A sample is collected by a self-made glass sampling pipe of a Tenax-TA adsorbent coated by a suitable amount of the PFBHA and a sampling condition is determined; under the condition that the loading amount of the adsorbent is 50mg, the sampling effect is optimal when the coating amount of a derivation agent is 260nmol, the collection flow speed is 50mL / min and the sampling time is 3-5 hours. The method has good separation degree, high sensitivity and low detection limit; the variety of the detected carbonyl compounds is more; the thermal stability of an oxime derivative with the weak polarity, which is generated by reaction, is good; the method is applicable to GC / MS (Gas Chromatograph-Mass Spectrometer) analysis. Furthermore, the method is simple and feasible and can be used for detecting and analyzing atmosphere samples.

The invention relates to a pulse helium ionized gas phase chromatographic instrument which comprises a gas carrying unit, a sampling unit, a gas path control unit, a circuit control unit, a separation unit and a test unit; the invention is characterized by further comprising a tail gas processing unit and a signal collection and data processing unit; the tail gas processing unit receives the waste gas discharged by the separation unit; the signal collection and data processing unit is a countercharge chromatograph workstation; the gas carrying unit is constructed by a solid state filter and a helium purifier to provide high purity carrying gas for the separation unit; the sampling unit is used for sampling and automatic sampling injection; the separation unit is comprises a switching procedure of three valves and four columns; the test unit is a pulse helium ionized tester. The stable path control and the circuit control parts of the invention can ensure the instrument to work for a long time and can show good response to all the impurities in the high purity gas, the measurement result can meet the gas standard requirement, the operation is simple and the whole process is in automatic control.

The invention relates to the technical field of transport line planning, and discloses a method for determining customized bus traffic zones and get-on / get-off stations, a customized bus line planningmethod which is based on the determined get-on / get-off stations and enables each single station to correspond to another single station, a method for evaluating rationality of customized bus lines onthe basis of K-fold cross validation, and a taxi GPS big data-based customized bus line planning method. Compared with the prior art, existing taxi GPS big data is utilized to a greater extent to putforward a better traffic zone division method and a better line planning method and a better line evaluation method, so that better reference basis is provided for the development of customized buses.

A mask (10) has a lightweight, robust, plastics or metal frame or body (12) on which other components are supported. The body (12) includes straps or arms (14) to allow the mask to be temporarily attached to the user's head and is designed to provide a light omitting cover for the user's eyes. A suitable light source such as an infrared light source (20) is provided to illuminate the user's eyes (22). A pair of lenses (30) is provided to focus images of the user's eyes onto a pair of image sensors (40). There is also described a method of diagnosing various disorders by investigating changes in the eye using the mask (10). The portable device (10) can be used for the investigation of nystagmus or more generally in oculography, and for the investigation of other changes in the eye.

The invention provides a low-light image enhancement method based on a red green blue (RGB) color model. The problems that in the prior art, image detail information and marginal information are ignored or lost are solved. During the process that low-light image color information is applied to image enhancement, the method comprises steps of extracting and inputting R, G and B component images of an image; conducting frequency division for R, G and B component images; conducting histogram equalization for low frequency components of R, G and B component images; conducting weighting for high frequency components of R, G and B component images; conducting linear combination for processed low frequency components and high frequency components and obtaining processed R, G and B component images; and combining processed R, G and B component images and outputting a final enhanced image. Accordingly, the illumination of the image is improved, the noise in the image is reduced effectively, the detail information and the marginal information of the image are retained well, and the quality of a color image which is shot under the condition of insufficient light is improved.

The invention provides an enzyme-linked immunoassay method for determining the content of a cell DNA (Deoxyribonucleic Acid) injury marker H2AX. The enzyme-linked immunoassay method is characterized by comprising the steps that sandwich recognition on the specificity of a target protein H2AX is carried out by using a specific H2AX antibody and an enzyme-linked second antibody, a substrate after enzyme reaction is added, then the substrate is subjected to enzyme catalysis to be changed into a fluorescence product, wherein quantitative determination for the H2AX content can be realized according to a fluorescence value of the substrate. According to the method, the content change of the H2AX in the cells, caused by the fact that cigarette smoke is exposed, is quantitatively determined so that the aim of evaluating the virulence of cigarette smoke genes is realized. Compared with a traditional organic dye, the enzyme-linked antibody has the advantages that the catalyzing frequency of an enzyme is high, an amplification reaction effect is amplified and the detection sensitivity is improved; the enzyme has a stable property at a room temperature, is low in price, and is suitable for a lot of analysis. An enzyme-linked immunosorbent assay has the advantages of rapidness, accuracy, high throughput, high sensitivity and the like.

The invention relates to a method and kit for construction of a single-cell DNA sequencing library, specifically to a method and kit for construction of a single-cell DNA sequencing library used for high-flux sequencing.

The invention relates to a method and a system for detecting terminal information in a GPRS network. The method comprises the following steps of: acquiring UA information and a corresponding mobile phone number thereof; performing matching analysis on the UA information and all keywords in a keyword specimen bank, and if the UA information is matched with one or more keywords in the keyword specimen bank, associatively storing the matched keywords and the mobile phone number so as to acquire the information of a terminal to which the mobile phone belongs; if the UA information is not matched with any keyword in the keyword specimen bank, storing the UA information to an unparsed UA bank; and regularly acquiring the UA information in the unparsed UA bank, extracting keywords from the UA information, and updating the extracted keywords to the keyword specimen bank. The method can be applied to systems needing acquiring mobile phone terminal information.

The invention relates to a multidimensional chromatography combination separation device, which comprises a pressurized capillary electrochromatography unit. The pressurized capillary electrochromatography unit comprises a mobile phase driving device, an injection valve, a capillary chromatographic column and a buffer solution bottle which are connected mutually and sequentially, a high-voltage power supply connected in parallel with the capillary chromatographic column, and a detector connected on the capillary chromatographic column. The separation device also comprises a capillary ion-exchange chromatography unit. The capillary ion-exchange chromatography unit comprises a mobile phase driving device, an injection valve and a capillary ion-exchange chromatography column which are connected mutually and sequentially. The capillary ion-exchange chromatography column is connected with an injection port of the injection valve of the pressurized capillary electrochromatography unit. The multidimensional chromatography combination separation device has the advantages of high separation efficiency, large peak capacity, small sample dosage, low raw material cost and low pollution, has more excellent peak capacity and separation capacity than the conventional one-dimensional chromatography, pressurized capillary electrochromatography, two-dimensional liquid chromatography and the like, and is more suitable for analysis of the complex sample.

The invention discloses a pre-column derivatization method for high-performance liquid chromatography for analyzing amino compounds, and belongs to the technical field of analytical chemistry. The process is as follows: prepare the sample solution with a borax buffer solution with a pH of 8.0 to 11.5 and a concentration of 0.05 to 0.35M for the primary or secondary or primary and secondary amino compound samples, and add dimethoxybenzenesulfonyl chloride Methanol or ethanol or acetonitrile solution, mix well, conduct derivatization reaction at 25-45°C for 10-40 minutes, cool in ice-water bath, filter and inject samples into full-performance liquid chromatography, use ultraviolet detector to detect the derivatization of amino compounds Derivatives were analyzed quantitatively. The invention has the advantages of simple derivation reaction operation, short reaction time, high sensitivity, simultaneous derivation of primary and secondary amine compounds, no need to remove excess reagents after derivation, stable derivatized products, low derivatization reaction temperature, and is especially suitable for the analysis of biological samples.

The invention discloses a gas chromatograph for gas analysis in production field, comprising a sampling unit, a gas path control unit, a circuit control unit, a separation unit, a detection unit and a data processing unit. The gas chromatograph for gas analysis in production field is characterized in that the sampling unit is a sampling and automatic sample injection unit, and is composed of a fixed volume sampling tube, a flow meter and a ten-way valve with blowing function; the gas path control unit is composed of a solid filter, a stainless steel diaphragm pressure stabilization valve and a helium purifier, and provides high-purity carrier gas for the separation unit; the circuit control unit is composed of a temperature control circuit, a signal amplification circuit and a detector pulse high-voltage circuit; the separation unit is provided with three diaphragm valves with blowing function, wherein one is the ten-way valve with blowing function in the sampling unit, the other two are four-way valves with blowing function, and complete separation of constituents is completed through a three-valve and four-column switching flow; the detection unit is a pulse helium ionization detector; and the data processing unit is composed of an embedded industrial control computer and a data uploading module. The gas chromatograph for gas analysis in production field has the advantages of high detection sensitivity, good stability and strong operability.

The invention provides a real-time feature extraction method for the analysis of complex ingredients of traditional Chinese medicines. The method adopts a data communication module, a two-dimensional feature chain detection module, a correction module for local noise and local baseline and feature distinguishing module. Mass spectrometric data collected by a sequence-analysis mass synchrometer is used for determining whether the data has continuous features with data collected at the previous time point so as to dynamically detect a two-dimensional feature chain; utilizing the mass-charge ratio and time information contained in the two-dimensional feature chain can quickly remove noises and baselines in time dimension, thereby overcoming the defect that the previous algorithm can not be accurately estimate the baseline by means of time dimension only; as the estimated noise and baseline have local features, a local signal-to-noise ratio is that whether the feature chain contains the feature of a component, thereby simplifying the realization of feature detection. The invention has reasonable design, and the data processing system has the characteristics of real time, fewer custom parameters and high arithmetic speed, which is applicable for liquid chromatograph-mass spectrometers.

The invention discloses a detection method for odor substances in exhaust gas of the perfume and essence industry. According to the invention, exhaust gas discharged by the perfume and essence industry is directly or indirectly acquired, then solid-phase micro-extraction (SPME) or solid-phase adsorption-thermal desorption technology are employed for extraction of a sample; and extraction temperature and extraction time are adjusted and GC-MC is cooperatively used for analysis of the exhaust gas sample. The detection method is high in efficiency, simple to operate and applicable to analysis of odor substances with any concentration. An airbag method and negative pressure sampling technology are cooperatively used, an appropriate sampling point is selected and a representative gas sample is acquired, so original information of the sample is maintained to a greatest extent. A sampling bag has good airtightness, and a sample in the bag can be maintained for more than one month. SPME pretreatment technology is employed, so the advantages of greenness, rapidness, no pollution and repeated usability can be obtained. The detection method is applicable to both exhaust gas discharged in the perfume and essence industry and to detection of exhaust gas of industries like petroleum, the chemical industry, food, medicine and cosmetics.

The present invention relates to a semiquantitative detection method of ferric content in powder material. Said method includes the following steps: firstly, preparing various reagents required for developing color; respectively preparing standard sample and sample to be detected; then collecting original image information of developed standard sample and sample to be detected; comparing chromatic values of them to obtain ferric content range of sample.

The invention discloses an automatic pickup method of an earthquake preliminary wave based on mean shift clustering analysis. The method comprises the steps of: preprocessing earthquake data, converting waveform information into point density information, performing clustering on preprocessed records, giving a channel with a higher signal-to-noise ratio to serve as an initial channel for startingpickup, optimizing clustering centers corresponding to the preliminary wave according to the principle of minimum time difference starting from the initial channel, processing a record obtained from single shot by using a MeanShift clustering algorithm in view of the characteristic that the amplitude of the preliminary wave is the highest, optimizing the clustering result, and obtaining a corresponding first arrival time to serve as an automatic pickup result. According to the automatic pickup method disclosed by the invention, a probability density distribution function of sample data does not need to be known in advance, dependence is completely made on the calculation of sample points, certain convergence is performed in the case that the sampling is sufficient, and density estimationcan be performed on data complying with arbitrary distribution.

The invention discloses a replicate system of an automobile engine steel grade, comprising an eddy current probe, an electric displacement platform, a difference circuit, a signal conditioning circuit, a data collector, a trace imaging module and an actuating signal generating and conditioning circuit, wherein the trace imaging module is used for outputting an actuating command signal F45 to the actuating signal generating and conditioning circuit; the actuating signal generating and conditioning circuit is used for transmitting an actuating signal uin to the eddy current probe according to the actuating command signal F45; the eddy current probe is combined with the electric displacement platform to carry out surface-layer defect scan detection on a piece to be tested in order to obtain defect information uout on the tested piece; after the defect information uout passes through the difference circuit, the signal conditioning circuit and the data collector, numerical defect information u3 is transmitted to the trace imaging module; and the trace imaging module carries out surface-layer trace original information restoration of the received numerical defect information u3 to obtain the original actual image information of the tested piece. The replicate system can nondestructively detect magnetic field variation of the automobile engine steel grade due to altering and falsifying traces, thereby replicating the original automobile engine steel grade.

The invention discloses a radioactive aerosol particle recovery device, comprising an inlet nozzle and an inlet duct; a plurality of impact orifice plates with specific orifice sizes are assembled below the inlet duct in order; a collection carrier for intercepting particle with the determined scope is arranged below each impact orifice plate; a high efficient filter film installed in the filter film liner is arranged below the lowest collection carrier; the particles passing through the collection carrier reach the next impact orifice plate or high efficient filter film via a transitional tube; an exhaust tube nozzle is arranged below the filter film liner; and the exhaust tube nozzle is connected with an exhaust power regulation and control device for wholly operating. In the radioactive aerosol particle recovery device, the particles in the different ranges can be collected on the different carrier; the radioactive aerosol particle recovery device is applicable to radioactive aerosol mass spectrometer measurement with many specific purposes or the related measurement thereof. Furthermore, the recovery device is also applicable to the special site where it is not convenient to sample by using the common aerosol sampling device, so that the recovery device is in accordance with the special sampling and monitoring requirement of certain aerosols.

The invention belongs to the technical field of metallurgical industry analysis and discloses a method for determining germanium content of a cobalt-nickel slag by atomic fluorescence spectrometry. The method comprises the following steps: preparing a germanium standard solution, a zinc standard solution and a thiourea-ascorbic acid mixed solution, and drawing a germanium standard solution curve; weighing a cobalt-nickel slag sample to prepare a sample solution; determining the fluorescence intensity of germanium in the sample by using an atomic fluorescence spectrometer; and comparing with the germanium standard solution curve and analyzing the content of the germanium in the sample solution. According to the method, after the approximate equal amount of zinc is added into the germanium standard solution, the germanium standard curve is drawn to eliminate the inferences to a detection result by the base body zinc. The method disclosed by the invention has the characteristics of low detection limit, wide linear range, low maintenance cost, rapidness in measurement, simplicity in operation, good accuracy, high precision, capability of simultaneously and rapidly determining elements to be detected and the like; furthermore, the method has the characteristics of few needed reagents, low cost and high automation degree, is suitable for analyzing a large batch of samples and has a very good industrial utilization value.

The invention discloses a USB printer data monitoring analysis system and method. The system comprises a data acquisition module and a page restoring and content resolving module, wherein the data acquisition module is used for acquiring the data and commands sent by a host to a USB printer and transmitting the data and commands to the page restoring and content resolving module; and the page restoring and content resolving module resolves the data from the data acquisition module, distinguishes the printing page information from the USB printer information and starts a simulation restoring function to restore the printing page information. Without changing original printing connection relationship and without restriction of a monitoring platform, the system disclosed by the invention has the characteristics of independent work, unified application, convenience in deployment and the like and is suitable for the third-party supervision and information analysis.

The invention discloses a dispersive liquid liquid micro-extraction gas chromatography-mass spectrometry for detecting major higher alcohols in fermented wine and belongs to the technical field of analytical chemistry. The method comprises the following steps: selecting appropriate extraction agents and dispersing agents, mixing a certain amount of extraction agents and dispersing agents with internal standard substances, rapidly injecting the mixture into a wine sample to form emulsion so as to be extracted, centrifugally collecting the extraction phase, performing gas chromatography-mass spectrometry, and quantifying through an external standard method, thereby obtaining analytical results of higher alcohols in the fermented wine. The DLLME (Dispersive Liquid Liquid Microextraction) method used for performing sample pretreatment has the advantages that the dose of an organic solvent is small, the operation is rapid, simple and convenient, the usage amount of the organic solvent is small, the detection result accuracy is high, and the recovery is satisfactory. By considering the advantages of low cost and environment friendliness, the method is easily used in practice, is particularly suitable for analysis of a large batch of samples, and can be applied to detecting the major higher alcohols in multiple kinds of fermented wine.

The invention discloses a Halphen IB distribution-based flood frequency analysis method and system, and belongs to the field of hydrological analysis and calculation. According to the flood frequency analysis method, Halphen IB distribution is introduced to flood frequency analysis firstly; a flood probability density function is established; parameter evaluation on the Halphen IB distribution is realized by adopting a maximum entropy principle based on distribution function characteristics; and then a design flood value in one time every T years is solved based on the flood probability density function through deducing. The invention also realizes a Halphen IB distribution-based flood frequency analysis system. The flood frequency analysis method and system disclosed by the invention are quite suitable for hydrological frequency analysis, and the fitting result is basically better than that of other distribution in the hydrological frequency analysis. Therefore, a more effective approach is provided for the hydrological frequency analysis.

The invention discloses sorbic acid haptens, synthesis methods thereof, a sorbic acid artificial antigen, a sorbic acid antibody and an application of the antibody. Two sorbic acid haptens with different structures are provided, wherein the sorbic acid hapten having a structure represented by formula (I) is used as a sorbic acid immunization hapten, the sorbic acid immunization hapten is highly similar to a target analyte sorbic acid, maximally reserves the characteristic structures of the sorbic acid, and can well expose the antigenic determinant of the hapten, so the sorbic acid hapten has obviously enhanced immunogenicity, and has the aldehyde group which can be coupled with a carrier protein; and when a sorbic acid immunizing antigen obtained after coupling the sorbic acid hapten withthe carrier protein is used to immunize an animal, it is beneficial to stimulating the immune response of the animal to produce the antibody with a high specificity and a high sensitivity, the IC50 ofthe sorbic acid antibody detected by indirect competitive ELISA is 11 mg / L, and a basis is provided for subsequent establishing of various immunoassay methods for sorbic acid.

A purpose of the invention is to provide a nanometer carbon nitride / copper oxide composite material, and a nanometer carbon nitride / copper oxide composite solid-phase micro-extractor, a preparation method and applications thereof. The preparation method of the nanometer carbon nitride / copper oxide composite solid-phase micro-extractor comprises: dispersing nanometer carbon nitride in deionized water, adding a copper nitrate solution while stirring, adding a hexamethylenetetramine solution in a dropwise manner, continuously stirring until the materials are uniformly mixed, stopping the stirring, carrying out a constant temperature reaction for 3-5 h at a temperature of 80-100 DEG C, collecting the precipitate after the reaction is completed, washing, drying to obtain a nanometer carbon nitride / copper oxide composite material, and wrapping the surface of quartz fibers with the nanometer carbon nitride / copper oxide composite material through a silica colloid to prepare the solid-phase micro-extractor. According to the present invention, the nanometer carbon nitride / copper oxide composite material has good adsorption performance on polycyclic aromatic hydrocarbons, and the solid-phasemicro-extractor prepared from the composite material has high extraction efficiency on polycyclic aromatic hydrocarbons, and can meet the detection requirements of polycyclic aromatic hydrocarbons.

The invention discloses a method for preparing a perfluorinated silane modified magnetic extraction stirring stick. The method comprises the following steps of: preparing a magnetic stirring stick, pretreating the surface of the magnetic stirring stick and preparing the perfluorinated silane modified magnetic extraction stirring stick. The perfluorinated silane modified magnetic extraction stirring stick is prepared by mutual action between fluorine and fluorine; competitive adsorption of stirrers during fiber solid-phase micro extraction is avoided; the volume of extraction solid phase is 50 times more than that of the solid-phase micro extraction; the enrichment time is obviously improved; the adsorption property is high; the selectivity is high; the low efficiency and non-selectivity of enrichment in a complicated substrate are avoided; perfluorinated compounds can be specifically and selectively extracted and separated; and trace analysis is facilitated.

The invention relates to a method for determining contents of 21 types of terpenoids in tobacco leaf and application of the method, and belongs to the techcnial field of tobacco component detection. The method comprises the following steps that the tobacco leaf after freeze-drying is mixed with an internal standard and dichloromethane, extraction is carried out then, solid is separated from liquid, and a solvent is removed from the liquid to obtain an extract; a derivatization reagent is added into the extract for reaction, and a solution to be tested is obtained; and GC-MS / MS analysis is carried out on the solution to be tested, the contents of 21 types of terpenoids are determined, and the contents of the 21 types of terpenoids in tobacco leaf powder are calculated. The determining method covers more terpenoids, the GC-MS / MS method is used, the sensitivity, selectivity and efficience are high, interference is low, and the method can be applied to different types of terpenoids including sesquiterpene, diterpene and sterol.

The invention discloses a method for pretreating a sample during detection of impurities in high-purity aluminum metaphosphate by using a plasma spectrum method, which belongs to the technical field of detection of trace impurity elements, and is used for solving the problems that the impurities are easily introduced, the interference is great and the sample introduction flow fluctuates to influence the accuracy in the conventional method. The method mainly comprises the following steps: (1) weighing a solid-state high-purity aluminum metaphosphate powder sample, adding the sample into a plastic closed container, adding a concentrated hydrochloric acid solution and fully contacting aluminum metaphosphate with the acid solution, closing the plastic closed container, and preserving the digestion temperature to be 180-200 DEG C for 4-5 hours; and (2) if clarification is achieved, cooling to room temperature, transferring the solution into a volumetric flask, diluting the solution to achieve the scales, and shaking uniformly, thereby obtaining an aluminum metaphosphate sample solution; if clarification is not achieved, adding a proper amount of hydrofluoric acid, stirring, standing, diluting the solution to achieve the scales after the solution is clarified, shaking uniformly, thereby obtaining the aluminum metaphosphate sample solution. The method disclosed by the invention has the characteristics of relatively few reagents, low salinity and low spectral background and is mainly used for measuring the trace impurity elements contained in high-purity aluminum metaphosphate.