175results about How to "Applicable testing" patented technology

The invention discloses an analysis method for simultaneously determining 16 phenolic compounds in water environment, and belongs to the technical field of phenolic compound analysis. According to the invention, solid phase extraction (SPE) is used for preprocessing a water sample, and a gas chromatography and mass spectrum coupling technique method (GC-MS) is used for qualitatively and quantitatively analyzing the 16 phenolic compounds in the water sample. Under the analysis condition optimized by the analysis method, the 16 phenolic compounds in water can be simultaneously determined, a good chromatographic peak can be obtained within 28 minutes, and a good separation effect can be obtained. The linearity of all the objective compounds in the concentration range of 5-1000 <mu>g / L is good, the correlation coefficients are all more than 0.9959, the detection limit achieves 0.04-4.0 <mu>g / L, the relative standard deviation is 0.22-13%, and the labeling recovery rate is 77-112%. The analysis method disclosed by the invention is simple, easy to operate, accurate and reliable, so that the analysis method is suitable for detecting large-scale samples.

The present invention provides a workpiece three-dimensional dimensions automatic detection system and method based on laser scanning. The system comprises a three-dimensional moving platform, a three-dimensional moving platform numerical control module, a laser scanning sensor, a laser scanning sensor numerical control module, a laser scanning sensor rotating mechanism, a power module and detection software, and belongs to the technical field of three-dimensional scanning and digital analysis. According to the system, the numerical control three-dimensional moving platform is used, so that total dynamic measurement is implemented, manual movement detection is replaced, and detection efficiency is improved; a pneumatic floating slideway is used, so that movement precision is improved; thelaser scanning sensor rotating mechanism is assembled on a Z-axis pneumatic floating slideway, so that deflexion of the laser scanning sensor can be implemented, and a workpiece is scanned from different angles; and a blue line sweeping laser scanning sensor is selected, so that anti-interference is strong, and measurement precision is high.

The invention discloses a system for testing the dynamic parameter of a high-speed electromagnetic valve for a knitting machine. The system comprises a testing table (1), a measurement and control circuit board (2), an upper computer (3) and an external power supply module (4), wherein the upper computer (3) comprises a data acquisition card and an image acquisition card; the data acquisition card is used for communicating with the measurement and control circuit board (2) and measuring a voltage signal to be tested, which is output by the measurement and control circuit board (2); and the image acquisition card is used for synchronously acquiring and storing output data of a high-speed line scanning camera (5) and has the function of synchronously triggering a measurement interface circuit board (12). In the system, by adopting a machine vision-based non-contact measurement method and a design method of a virtual instrument, using a general computer and the data acquisition card and combining a self-developed hardware testing platform, the dynamic response time of the electromagnetic valve is accurately measured, and necessary testing data is provided for the design and inspection of electromagnetic valve products.

The invention discloses an image edge detection method with Canny operator improvement. The method comprises: S1, carrying out smoothing processing on an image and suppressing noises by using a gaussian filter; S2, calculating an image gradient amplitude and direction after smoothing; S3, carrying out non-maximum-value suppression on a gradient; S4, calculating high and low threshold values by using an iterative algorithm; S5, carrying out edge detection and connection by using a dual-threshold algorithm; and S6, carrying out edge refinement by using a mathematical morphological method. Therefore, noises can be suppressed effectively and an optimal segmentation threshold value can be obtained. The method is suitable for detection of a medical cell image.

The invention provides a gas leakage detecting device and a detecting method thereof. The gas leakage detecting device and the detecting method thereof are capable of performing high-efficiency and high-sensitivity detection on gas leakage of an airtight vessel at high altitude and are applicable to rapid detection of airtightness and rapid positioning of a large flexible structural vessel. The device is characterized in that a creeping and positioning assembly is used for carrying a mass spectrometer; a single leaking point of an airship is quantified and positioned at high altitude by adopting a tracer gas method, so that the detection can be quickly and efficiently carried out; in addition, a vacuum pump is used for rapidly pumping gas, thus gas in a certain volume can be concentrated and stored in a vacuum chamber within the shortest time, and as a result, the gas collecting capacity is improved; the mass spectrometer is used for sampling and detecting concentrated and mixed gas inthe vacuum chamber by utilizing a circulating fan, and thus the equipment detection efficiency is improved. According to the device, the gas is collected by adopting an injection and gas collecting unit; compared with a general gas collecting device, an injection hole is added, so that the detection sensitivity is improved; a chuck body is used for adsorbing a detected target under negative pressure as well as absorbing gas.

Provided is a method for predicting the residual stress of a metal plate based on residual stress release warpage. The residual stress of plates with different thickness is measured by using an X raymethod, a blind hole method, an ultrasonic method, a crack flexibility method or a finite element analysis method. Samples are cut by machining, the release of residual stress causes warpage of the plates, the warpage is measured by using a displacement sensor, and the relation between residual stress and warpage of the plates with different thickness is obtained. A quadratic equation y=a*x<2>+b*x+c is obtained through curve fitting, wherein x is residual stress, y is warpage, and a, b and c are fitting coefficients. The warpage y under a specific line cutting percentage is measured based on the established function relation between residual stress and warpage, and the residual stress is calculated according to the formula x=(-b+ / -the square root of b<2>-4*a*(c-y)) / 2*a.

The invention discloses a surface-enhanced Raman spectrum (SERS) substrate, and a preparation method thereof. The substrate comprises a flexible base layer and a noble metal layer. At least one face of the flexible base layer has a surface roughness like that of metallographic abrasive paper, and the noble metal layer is adhered to the flexible base layer, wherein the noble metal layer is formed by one or more materials selected from gold, solver, and copper. According to the invention, a noble metal surface with micrometer and nanometer double-roughness is directly formed on the base layer. The SERS substrate has ultra-high analytic sensitivity which is suitable for detections of ultra-trace samples, and has advantages of good reproducibility, simple production, short period, low cost, and suitability for batch productions. Therefore, the substrate and method provided by the invention can be widely applied in fields of homeland security, environmental monitoring, food safety, medical and health care, and the like.

The related bio-reagent is designed by: with conservative African swine fever virus VP73 gene fragment as target object, designing and composing carefully for large quantities of primers and probes, taking optimal pairing screen test on different conditions to obtain the most proper primer and probe. The fluorescence quantitative RT-PCR testing reagent includes one couple of specific primers and one specific fluorescent probe, and the amplification fragment length is 66bp. This invention is fit to fast testing for African swine fever.

The invention relates to a comprehensive explosive detection system and method based on an X-ray fluorescence (XRF) analysis technique. The system comprises a sealing box body for detecting, a conveying channel through which objects pass, a computer and a control system, wherein at least one group of energy spectrum detection assemblies are arranged above and below or on the two sides of the conveying channel and are used for detecting the varieties and content of elements in the movable or static objects in the conveying channel. According to the comprehensive explosive detection system and method provided by the invention, the principle of the XRF analysis technology is used for detecting explosives and the like and is applicable to the fields of online safety monitoring and the like.

The invention belongs to the technical field of a detection device, and relates to a sealing property detection device for a submersible pump. A pressure tank body and a guide bar at the outside of the tank body are fixed on a pedestal of a box; a tank cover of the pressure tank is slidingly arranged on the guide bar which is arranged between a top board and the tank body, and can be lifted and dropped driven by a cylinder; the tank body and the tank cover are locked together through an automatic locking device; the lower side of a vertical mounting board fixed on the bottom surface of the tank cover is provided with a supporting plate, a submersible pump positioning clamp and a bulkhead; the bulkhead is driven by the cylinder to move in the lateral direction and is used for blocking an oil chamber detection joint of the submersible pump; the middle part of the tank cover is provided with a bulkhead which is driven by the cylinder to move up and down and is used for blocking a motor chamber detection joint for the submersible pump; and the side wall of the tank cover is provided with a cable slot and a cable sealing locking block. The sealing property detection device for a submersible pump has the advantages of being accurate in the control motion, being high in detection precision, having more detection items, and being suitable for high accuracy detection of the submersible pump.

The invention discloses a residual stress measurement system through a hole-drilling method, and belongs to the technical field of material processing and experimental stress analysis. The system comprises two parts: a drilling device and stress calculation software. The drilling device is formed by a speed-adjustable electric hand drill, a tool microscope, a drill rod, a guide cylinder and a magnetic support base and the like; and the calculation software is programmed through C language, and can give residual stress in an assigned direction, or principal stress and included angle in real time. Since a drilling guide device adopts an embedded ball bearing mode, an rotary friction effect of the drill rod is totally prevented; since the support adopts permanent magnetic bases and lock nuts each having a breach, site positioning and fillet weld stress measurement are realized greatly; and since the calculation program takes features of change of hole edge plastic deformation and processing strain with the stress value into consideration, a stress calculation formula of any two vertical directions is given to enable welding residual stress measurement to become much easier and accurate.

The invention discloses a method for simultaneously measuring the concentrations of six tyrosine kinase inhibitors in blood plasma. Imatinib is adopted as an internal standard, a medicament in the blood plasma is extracted at first by virtue of a mixed solution of ethyl acetate and tert-butyl methyl ether, then a sample is separated by virtue of high performance liquid chromatography, medicament targeting detection is performed in a high resolution mass spectrometry parallel reaction monitoring mode, and secondary fragment ions of the medicament are used for quantification, so as to realize simultaneous analysis and measurement of the concentrations of the six tyrosine kinase inhibitors in the blood plasma. The method is quick, has the advantages of extremely high targeting performance, high speed, high throughput, high sensitivity, high specificity, high precision and accuracy, high stability, high extraction recovery rate, no obvious substrate effect or dilution effect, and the like, and can be used for plasma concentration monitoring of clinically common antitumor medicaments, i.e. tyrosine kinase inhibitors, and a nanogram-level detection limit can be achieved.

The invention discloses a detection method for narcotics in human body fluid based on a gold nanorods SERS substrate. The method comprises the steps that gold nanorod sols with different draw ratios and SERS activity are synthesized; the gold nanorod sols and a cleaning agent are mixed, ultrasonically oscillated, centrifugally cleaned and then dispersed into a stabilizing agent, the mixture is dropped on a clean silicon wafer after being centrifugally cleaned, and the SERS substrate is obtained after drying is performed; human urine is taken, an organic solution is added into the human urine to be mixed to be uniform, then, centrifuging is performed, an alkali solution is added into a supernatant, an organic extraction agent is added after uniform shaking, vibration extraction and centrifuging are performed, and then an organic layer solution is taken; the organic layer solution is dropped on the SERS substrate, a raman spectrometer is used for performing SERS detection. After the gold nanorod sols are cleaned with the cleaning agent, the influence of background signals is lowered, and both the detection sensitivity and the reproducibility are improved.

The invention relates to the technical field of metal oxide semiconductor sensors, in particular to a CeO2 / CuO (cerium oxide / copper oxide) heterojunction composite oxide and a preparation method and application thereof. The CeO2 / CuO heterojunction composite oxide comprises a CuO substrate and CeO2, wherein the CeO2 is loaded at the surface of the CuO substrate. A chemical molecular formula is xCeO2 / yCuO, wherein the ratio of x to y is (0.8 to 1.5):(9 to 11); the particle size is 0.5 to 2mum. The preparation method comprises the following steps of synthesizing the CuO substrate by a hydrothermal method; precipitating Ce(OH)4 (cerium hydroxide) at the surface of the CuO substrate by the hydrothermal method, and treating by the same hydrothermal temperature and time; finally, calcining, so asto obtain the CeO2 / CuO heterojunction composite oxide. Compared with the single CuO substrate, the CeO2 / CuO heterojunction composite oxide has the advantage that more active sites are provided, so that the better gas-sensitive property is realized on H2S (hydrogen sulfide), the content of H2S can be more accurately detected, and the decomposing condition of SF6 (sulfur hexafluoride) can be more accurately monitored.

The invention relates to examination clinic blood sample ApoE gene subtype method and kit, especially reverse dot blot hybridization technique fast measuring ApoE gene type and its kit.

A triphenylamine terpyridine manganese complex having double functions including two-photon development and magnetic resonance development and a synthetic method thereof are disclosed. The structure formula of the complex is shown in the description. The complex has a two-photon development function and a magnetic resonance development function, and can be adopted as a contrast medium for double modes. Compared with a commercial nuclear magnetic contrast medium that is Gd-DTPA, the complex can be ingested by cells well so that magnetic resonance signals are enhanced.

The invention discloses a detection method for a picture small target. The method includes using a to-be-detected picture as the input of a target detection network; obtaining six feature maps with different sizes from the to-be-detected picture, performing feature fusion on the bottom-layer feature map of the pyramid and the high-layer feature map of the pyramid in the six feature maps with different sizes by adopting a bilinear interpolation method to obtain six new feature maps with different sizes; considering the relationship among the scale feature maps; the feature map participating inprediction has richer detail information and semantic information; training the target detection network by using default setting of a pre-training model, using a random gradient descent algorithm tocarry out optimization training on the loss function expression, so rapid convergence of the model is facilitated, the trained target detection network is utilized to carry out testing, to-be-detectedimage characteristics are extracted, detection precision and detection speed of the picture small target can be effectively improved, and detection precision of the small target can be effectively improved under the condition of completely satisfying real-time performance.

The invention provides a Pt / Fe3O4-CeO2 composite material and a preparation method thereof. Pt nano-particles are deposited on the surfaces of CeO2 nanoparticles coated with Fe3O4. The preparation method comprises the following steps of 1, dispersing nano-CeO2 in water to obtain a nano-CeO2 solution having a concentration of 0.10 to 0.15mol / L, 2, carrying out ultrasonic oscillation, 3, orderly adding concentrated hydrochloric acid, a soluble Fe<3+> salt and a soluble Fe<2+> salt into the nano-CeO2 solution to obtain a mixed system, wherein the weight of the concentrated hydrochloric acid is 2% of the weight of the nano-CeO2 solution; a mole ratio of the soluble Fe<3+> salt to the soluble Fe<2+> salt is 2: 1; and the concentration of the soluble Fe<3+> salt in the mixed system is in a range of 0.8 to 1.0mol / L, 4, adding an ammonia water solution into the mixed system, 5, sequentially stirring for 20 to 40min to obtain a Fe3O4-CeO2 nanocomposite material, 6, preparing the Fe3O4-CeO2 nanocomposite material into a dispersion liquid having a mass concentration of 2.0 to 2.5mg / mL, 7, mixing the dispersion liquid and a H2PtCl4 aqueous solution, and 8, adding an NaBH4 aqueous solution into the mixed solution obtained by the step 7 to obtain the Pt / Fe3O4-CeO2 composite material. The invention also provides a use of the Pt / Fe3O4-CeO2 composite material in electroactive material detection.

The invention discloses a method for determining the substitution degree of hydroxypropyl chitosan. The method comprises the steps that 1, a hydroxypropyl chitosan sample is dried; 2, a detection model is established, and the establishment process comprises the steps that a, an infrared absorption spectrum of the sample is obtained through an infrared absorption spectrometer; b, the specific value X of an absorbance value A1 of the area of a methyl characteristic peak ranging from 1460 cm<-1> to 1456 cm<-1> to an absorbance value A2 of the peak height of a characteristic peak, ranging from 1602 cm<-1> to 1596 cm<-1>, of amino on the C2 position is determined; c, the substitution degree Y of the hydroxypropyl chitosan sample is determined through a standard method; d, a good linear regression model Y=kX + b is established by using Y on X, and therefore specific values of k and b in the model are obtained; 3, the specific value X, obtained through the infrared absorption spectrum, of the sample to be determined is substituted into the linear regression model, and then the substitution degree Y can be obtained through calculation. The method is simple, convenient, rapid and accurate, and precise weighing and sample dissolution are not needed.

The invention belongs to the technical field of medicines, and particularly relates to a related substance analysis method for terlipressin for injection. The content detection method for the terlipressin for injection includes the following steps: (Step 1) preparation of test solvent: the terlipressin for injection is prepared into the test solvent; (Step 2) preparation of self-control solvent: the test solvent is diluted, so that the self-control solvent is prepared; (Step 3) related substance content calculation: the control solvent and the test solvent are respectively injected into high-performance liquid chromatographs, so that chromatograms are obtained, and the related substance content in the test solvent is obtained by calculation.

The invention discloses a serum sample treating preparation used in a method for detecting a liquid phase protein by a suspension chip. The preparation comprises basic buffer solution, polyvinyl alcohol and polyvinylpyrrolidone, wherein the pH value of the basic buffer solution is between 5.5 and 9.0; the mass percentage of the polyvinyl alcohol in volume is between 0.05 and 1.5 percent; and the mass percentage of the polyvinylpyrrolidone in volume is between 0.05 and 2 percent. Because the serum sample treating preparation contains macromolecule surfactants of the polyvinyl alcohol and the polyvinylpyrrolidone, the preparation has the advantages of effectively lowering certain non-specific adsorption of the antibody, lowering background value and improving detection sensitivity.

The invention relates to the field of immune analysis medicine, and particularly provides a kit for detecting human bladder cancer by a chemiluminescent analysis method on the basis of immune magnetic particles and a preparation method for the kit. According to the invention, the kit mainly comprises: 1) a bladder cancer EJ cell standard product; 2) magnetic particles which are coated by monoclonal antibodies capable of specifically identifying bladder cancer cell surface antigen; 3) enzyme-labeled monoclonal antibodies capable of specifically identifying bladder cancer cell surface antigen; 4) a chemiluminescent substrate which the enzyme in the 3) acts on; 5) a reaction tube or a microporous plate; and 6) a magnetic separator matched with the reaction tube or the microporous plate in the 5).

The invention discloses a portable type grape sugar degree near infrared detection device and method and relates to the field of nondestructive measuring methods of farm products. The method comprises the steps that (1) to-be-detected grapes are placed onto a detection port of a near infrared sampling module; (2) an LED lamp switch is switched on, and near infrared spectral information is acquired; (3) a corresponding mathematical model is selected, and acquired spectra are processed; (4) corresponding sugar degrees are displayed on a screen. The near infrared spectroscopy is used, and rapid nondestructive testing of the sugar degrees can be completed; the spectral information acquired by a spectral acquisition port which is designed by applying the rubber soft fitting characteristic is good in quality, and the signal-to-noise ratio is high; the model linearity is good, and the detection accuracy is high; the device is small in size, high in reliability, expendable and easy to update on the basis of an embedded system; the device structure is simple, the cost is low, and the spectrum technology can be widely applied; the device is easy to carry due to the small size, suitable for many scenes, easy to popularize and suitable for sugar degree detection.

The invention discloses a digital light processing technology-based portable liquid food near infrared spectroscopy analyzer. The digital light processing technology-based portable liquid food near infrared spectroscopy analyzer comprises a LED light source assembly, a reflective mirror / condensing lens, a blazed grating, a digital micromirror assembly, a single-photon detector, a linear detector and a spectral information processing system. The near infrared spectroscopy analyzer utilizes a matrix composed of multiple LED chips as a near infrared spectroscopy analyzer light source. The condensing lens is arranged at the outer side of the LED chip so that a light source luminescence area is reduced and enough light source intensity is provided. The LED chip has the characteristics of high light intensity and low power and is conducive to reduction of a near infrared spectroscopy analyzer volume so that the near infrared spectroscopy analyzer is portable and is suitable for fluid food detection.

The related bio-reagent is designed by: with conservative West Nile virus E gene fragment as target object, designing and composing carefully for large quantities of primers and probes, taking optimal pairing screen test on different conditions to obtain the most proper primer and probe. The fluorescence quantitative RT-PCR testing reagent includes one couple of specific primers and one specific fluorescent probe, and the amplification fragment length is 71bp.

The invention discloses a device of utilizing a planar mirror set to determine qualification of shelf crossbeams, comprising a base, a conveyer belt, a proximity switch, a block, a push cylinder, a measuring bracket, a portal frame, an image shooting module, a leading screw driving module, a compaction cylinder and a flip driving module, wherein the image shooting module comprises an industrial camera, a first reflector, a second reflector, a third reflector and a parallel light source. The device utilizes a planar mirror reflection principle to make imaging of two distant installation holes close, and the installation holes actually shot by an industrial camera are amplified by several times than the installation holes not reflected by a planar mirror; the device can shoot images of higher resolution by employing an industrial camera of lower pixels, thereby reducing equipment costs; besides, the device utilizes a periscope principle to image two distant pairs of installation holes within a same industrial camera, reduces equipment total costs, and meanwhile determines qualification of a shelf crossbeam only by processing an image, thereby improving detection efficiency.

The invention discloses a food detection device, and belongs to the technical field of food safety. The device comprises a device body; the device body is provided with a micro particle analyzer, a data comparator and an alarm device; one side of the device body is provided with a sampling manipulator; the device body is also provided with a transmission mechanism for transmitting a detected sample. Compared with the prior art, the food detection device has the advantages of high degree of automation, fast detection speed and accurate measurement results, and is suitable for detection of liquid food on a scaled production line.

The invention relates to a toxic and harmful gas detection sensor and method, and belongs to the technical field of gas detection. The toxic and harmful gas detection sensor comprises a shell, a dielectric substrate, a sensitive dielectric film, an artificial plasmon resonator and a metal microstrip transmission band; the top of the shell is open-mouthed; the dielectric substrate is horizontally arranged and located in the shell, and the lower surface of the dielectric substrate is fixedly connected with the inner wall of the bottom end of the shell; the sensitive dielectric film is fixedly connected to the upper surface of the dielectric substrate; the artificial plasmon resonator is fixedly connected to the sensitive dielectric film; and one end of the metal microstrip transmission bandis fixedly and electrically connected with the artificial plasmon resonator, the other end of the metal microstrip transmission band penetrates the shell, and the metal microstrip transmission band isfixedly connected to the sensitive dielectric film. The gas detection sensor is small in size, low in power consumption, high in external interference resistance, easy to integrate and high in detection sensitivity.

The present invention relates to a transgenic plant and detection method of its product. Said invention uses the characteristic sequence being in transgenic plant: T-DNA left anjd right boundary sequence, CaMV 35S promotor, CaMV 35S poly A, nos promotor and nos termination sequence to design and synthesize initiator to make PCR to obtain correspondent DNA amplification product or signal of amplification product. According to the PCR result it can be used for recognizing that said detected sample is transgenic plant and its product or not.

The invention discloses a device for detecting the mounting holes of a shelf beam by use of plane mirrors. The device comprises a base, a conveyor belt, a proximity switch, a stopper, a push cylinder, a measurement bracket, a portal frame, image shooting modules, a screw driver module, a compression cylinder, and a turning driver module. The two image shooting modules are used for collecting images of front and rear pairs of mounting holes of a work piece to be detected. Each image shooting module includes an industrial camera, a camera holder, a parallel light source, a plane mirror mounting base, and a plane mirror, wherein the parallel light source emits vertically upward parallel light, the parallel light goes out from two mounting holes in the same end of the work piece to be detected after passing through a through hole, one light beam directly hits the industrial camera, and the other light beam is reflected by the plane mirror and then hits the industrial camera. The device has a simple and compact structure, and is low in cost of production. The process of mounting hole detection is continuous and online, there is no need to interrupt the production process, and the production efficiency and detection efficiency are improved.