47 results about "Magnetic analysis" patented technology

A microvalve which utilizes a low temperature (<300° C.) fabrication process on a single substrate. The valve uses buckling and an electromagnetic actuator to provide a relatively large closing force and lower power consumption. A buckling technique of the membrane is used to provide two stable positions for the membrane, and to reduce the power consumption and the overall size of the microvalve. The use of a permanent magnet is an alternative to the buckled membrane, or it can be used in combination with the buckled membrane, or two sets of micro-coils can be used in order to open and close the valve, providing the capability for the valve to operate under normally opened or normally closed conditions. Magnetic analysis using ANSYS 5.7 shows that the addition of Orthonol between the coils increases the electromagnetic force by more than 1.5 times. At a flow rate of 1 mL / m, the pressure drop is <100 Pa. The maximum pressure tested was 57 kPa and the time to open or close the valve in air is under 100 ms. This results in an estimated power consumption of 0.1 mW.

A microvalve which utilizes a low temperature (<300° C.) fabrication process on a single substrate. The valve uses buckling and an electromagnetic actuator to provide a relatively large closing force and lower power consumption. A buckling technique of the membrane is used to provide two stable positions for the membrane, and to reduce the power consumption and the overall size of the microvalve. The use of a permanent magnet is an alternative to the buckled membrane, or it can be used in combination with the buckled membrane, or two sets of micro-coils can be used in order to open and close the valve, providing the capability for the valve to operate under normally opened or normally closed conditions. Magnetic analysis using ANSYS 5.7 shows that the addition of Orthonol between the coils increases the electromagnetic force by more than 1.5 times. At a flow rate of 1 mL / m, the pressure drop is <100 Pa. The maximum pressure tested was 57 kPa and the time to open or close the valve in air is under 100 ms. This results in an estimated power consumption of 0.1 mW.

The invention provides a method for detecting the water content and fat content in abalone through a low-field nuclear magnetic resonance technology. The method comprises the following first step of collecting samples, the second step of carrying out low-field nuclear magnetic analysis on the sample, the third step of measuring the samples, the fourth step of establishing a model, the fifth step of evaluating the model, and the sixth step of measuring the water content and the fat content of the samples to be detected. By means of the method, the water content and fat content in abalone can be measured at the same time, detection is rapid and accurate and free of the influence of the surface feature of abalone, and abalone is not damaged in the measuring process.

The invention discloses a segmented polyester copolymer and a preparation method thereof. A structural formula of the copolymer is shown as a formula (I). An organic catalyst is directly adopted, so that the steps are simple and convenient in a polymer purification process, and heavy metal ions in a conventional method cannot be remained in a polymer. The esterification reaction of acid anhydride and an epoxy compound can be selectively catalyzed to obtain the polyester copolymer with geometrical isomerism chain segments, and generation of byproducts caused by catalysis of the open-loop auto-polymerization reaction of an epoxy group is avoided by the nuclear magnetic analysis of products.

The invention discloses a low field nuclear magnetic resonance-applied frozen beef freshness nondestructive testing method. The low field nuclear magnetic resonance-applied frozen beef freshness nondestructive testing method comprises the following steps of (A) sample collection, (B) sample measurement, (C) sample low field nuclear magnetic analysis, (D) multiple freshness-related index measurement, (E) model establishment, (F) model assessment and (G) measurement of freshness of samples to be detected. By establishing a mathematical predication model reflecting fresh beef moisture content relaxation spectrum information and multiple indexes related to fresh beef freshness to accurately and reliably detect multiple indexes of an unknown fresh beef simultaneously such as thiobarbituric acidreactive substances (TBARS), volatile basic nitrogen (TVB-N) and pH, the low field nuclear magnetic resonance-applied frozen beef freshness nondestructive testing method can help predict the storagetime of the beef and achieve rapid and nondestructive detection and assessment of the freshness of the fresh beef. The low field nuclear magnetic resonance-applied frozen beef freshness nondestructivetesting method is rapid and accurate, avoids influence of beef surface properties, and during measurement, has no damage to the beef.

The invention discloses a method for identifying carbonate reservoir physical properties while drilling. The method comprises the following steps: obtaining the nuclear magnetic analysis data and well log analysis data of the carbonate reservoir physical properties; performing correlation analysis on the nuclear magnetic analysis data and the well log analysis data, and creating a relationship between the nuclear magnetic analysis data and the well log analysis data; determining the nuclear magnetic analysis classification standards of a reservoir according to the relationship between the nuclear magnetic analysis data and the well log analysis data as well as the well log classification standards of the carbonate reservoir; identifying the carbonate reservoir while drilling by the nuclear magnetic analysis classification standards of the reservoir. Compared with a reservoir classification mode based on well log interpretation data, the physical property parameters of the horizontal-section reservoir can be quickly obtained by the nuclear magnetic analysis technology, so that the method provided by the invention can realize quantitative classification of the reservoir physical properties while drilling and accurate evaluation of reservoir quality.

The invention provides a magnetoencephalography data acquisition and analysis method and system, and relates to the technical field of medicine. The magnetoencephalography data acquisition and analysis method is applied to the magnetoencephalography data acquisition and analysis system based on an atom magnetometer, wherein the system comprises a stimulation generation device, a magnetoencephalography data acquisition device and a magnetoencephalography data analysis device; the magnetoencephalography data acquisition device is connected with the magnetoencephalography data analysis device; and the stimulation generation device and the magnetoencephalography data acquisition device both act on a subject. The method comprises the steps that the magnetoencephalography data acquisition device acquires magnetoencephalography data generated by the subject under stimulation of the stimulation generation device, and the magnetoencephalography data analysis device receives the magnetoencephalography data transmitted by the magnetoencephalography data acquisition device and analyzes the magnetoencephalography data to generate various brain magnetic analysis results. The complete magnetoencephalography analysis method and system can be provided for the atom magnetometer, and experiment and clinical analysis are facilitated.

The invention discloses a method for rapidly screening adulterated illegal cooking oil in edible oil by applying low-field nuclear magnetic resonance. The method comprises the following steps: measuring a relaxation signal of a to-be-measured oil sample by using specific test parameters; carrying out principal component analysis on the basis of T2 transverse relaxation time spectrogram informationobtained through inversion under the specific parameters; thus, quickly judging existence of illegal cooking oil adulteration in the to-be-detected oil sample through the relative position of the to-be-detected sample on the PCA graph, further constructing a prediction model through the characteristic parameter values and the adulteration proportion, and calculating the adulteration proportion inthe to-be-detected oil sample through the prediction model. On the basis of the method, by replacing different types of qualified edible oil samples, the identification of adulteration of the illegalcooking oil into various types of edible oil can be realized; and by selecting low-field nuclear magnetic analyzers with different models and specifications, the requirements of on-site rapid, low-detection-limit and high-sensitivity detection of illegal cooking oil and adulterated oil samples of the illegal cooking oil can be met, and an effective solution is provided for analysis and identification under different occasions and conditions.

The invention relates to a method for recycling hydroxyproline wastewater, in particular to a method for preparing L-alanine by taking hydroxyproline process wastewater as a raw material. L-alanine is prepared by taking the hydroxyproline wastewater as the raw material through a high-temperature oxidization method and then separated and purified through the coupling processes of activated carbon decoloration and concentration, alcohol solution separation and alcohol (ketone) solution recrystallization. It is determined that the obtained product is a pure L-alanine product through nuclear-magnetic analysis and specific rotation determination. According to the method, wastewater recycling is achieved, the wastewater treatment cost is reduced, and the sustainable development goal of resources and environment is achieved.

The invention provides a device for analyzing mechanical properties of hydrate sediments based on low-field nuclear magnetism. The device comprises a miniature reaction kettle body mounted on a low-field nuclear magnetic resonance analyzer, a confining pressure cavity positioned in the reaction kettle body, a radio frequency coil arranged on the outer side of the reaction kettle body, a reaction kettle upper end cover, a reaction kettle lower end cover, a hole pressure control module, a confining pressure control module, an axial pressure loading plunger, an axial pressure loading reaction frame and an axial loading control module. The invention discloses an experimental device based on combination of low-field nuclear magnetic resonance detection and three-axis shearing and a corresponding testing method. According to the method and the device, macro-mechanical data of a hydrate reservoir are obtained on a low-field nuclear magnetic resonance platform, meanwhile, micro-pore structureevolution characteristics of the hydrate reservoir in the loading process are obtained, and technical support is provided for cross-scale research of the mechanical property and the deformation mechanism of the natural gas hydrate reservoir.

The invention provides a determination method for the reaction activity order of active hydrogen-containing components and a curing agent in a propellant, wherein the method is applied to the field of nuclear magnetic analysis of spaceflight fuels. The method comprises the following steps: determination of a detection object; preparation of detection samples; selection of detection conditions; implementation of sample detection; and processing of detection data. According to the invention, a mixed uniform system of active hydrogen-containing components and toluene diisocyanate (TDI) in the propellant is taken as the detection object. To prepare the samples, groups are proportioned according to concentrations, grouped and then uniformly mixed; and a proper amount of the samples are selected and placed in a chromatographic bottle. A low-field nuclear magnetic resonance spectrometer is employed, and the detection conditions are selected. The changing curve of spin-spin relaxation time T2 with reaction time is detected, each vertical coordinate of the curve is normalized, and the reaction activity order of each component and TDI is acquired according to the speed of slope changes before the curve tends to be flat. The determination method provided by the invention has the advantages of simple operation, safety in experiments, reduction in cost, reliable experimental data, optimized detection conditions and simplified detection process.

The invention relates to an electromagnetic analysis attack resistance device and method for safety equipment. The electromagnetic analysis attack resistance device for the safety equipment comprises an electromagnetic signal collection antenna, an electromagnetic signal compensation module and an electromagnetic signal compensation antenna. The electromagnetic signal collection antenna is used for receiving an electromagnetic radiation signal radiated by the safety equipment and converting the electromagnetic radiation signal into an electric signal. The electromagnetic signal compensation module is used for analyzing the feature information of the electric signal and generating a compensating signal according to the analysis result and the compensation strategy. The electromagnetic signal compensation antenna is used for emitting the compensating signal so as to compensate the electromagnetic radiation signal. By means of the electromagnetic analysis attack resistance device and method for the safety equipment, electromagnetic analysis attack resistance of the safety equipment can be better achieved.

Two centerlines each of which goes through the center of a surface and is parallel to one of the coordinate axes are considered for each surface constituting a cell. If one of the centerlines intersects a boundary, a line which goes through the intersection and is orthogonal to the centerline is approximated as a new boundary. If a boundary intersects with each of the two centerlines, an orthogonal line expressed by each of two lines which is obtained by crossing each of the two centerlines parallel to each different coordinate axis and a boundary is approximated as a new boundary. Thus, the new boundary is expressed by each part of these orthogonal lines toward the centerline from their intersection.

The present invention proposes a device for analyzing the mechanical properties of hydrate deposits based on low-field nuclear magnetic resonance, which includes: a micro-reactor body installed on a low-field nuclear magnetic resonance analyzer, a confining pressure chamber located in the reactor body, and a micro-reactor body installed on the reactor body The outer radio frequency coil, the upper end cover of the reactor, the lower end cover of the reactor, the pore pressure control module and the confining pressure control module also include: the axial pressure loading plunger, the axial pressure loading reaction frame and the axial loading control module. The present invention is based on the experimental device combined with low-field nuclear magnetic resonance detection and triaxial shearing and the corresponding test method. The macroscopic mechanical data of the hydrate reservoir is obtained on the low-field nuclear magnetic resonance platform, and the hydrate storage during the loading process is simultaneously obtained. The evolution characteristics of the microscopic pore structure of the gas hydrate reservoir provide technical support for the cross-scale study of the mechanical properties and deformation mechanism of the gas hydrate reservoir.

The invention relates to an X-ray diffraction device with a magnetic analysis function. The X-ray diffraction device comprises a sample stage, an X-ray source, a detector and a magnetic field generator. A glass slide can be fixed onto the sample stage, and a sample is mounted on the glass slide; the X-ray source is used for illuminating the sample with X-rays; the detector is used for detecting the X-rays reflected by the sample; the magnetic field generator is used for generating magnetic fields and applying the magnetic fields to the sample. The X-ray diffraction device has the advantages that the X-ray diffraction device further has the certain magnetic analysis function besides traditional functions and accordingly can replace neutron diffraction devices to a certain degree.

The invention discloses a preparation method of superparamagnetic nanoparticles capable of magnetically adsorbing bacteria and bacterial spores. The preparation method comprises the following specificsteps of adding NiCl2 into DEG containing NaOH and NaCit, and carrying out pyrohydrolysis and reduction reaction; rapidly injecting the prepared NaOH / DEG mixture into a NiCl2 / NaCit / DEG phase, and enabling the color to rapidly change from greenish green to black; after the reaction, cooling to room temperature, and carrying out magnetic analysis on the superparamagnetic nano nickel nanoparticles(SNCNC); culturing escherichia coli by an LB culture medium, and detecting the combination condition of SNCNC and Escherichia coli by a transmission electron microscope. The superparamagnetic nickel nanoparticles can adsorb the bacteria more efficiently so as to remove the bacteria, and can absorb the high-temperature-resistant, high-pressure-resistant and radiation-resistant bacterial spores so as to remove the spores.

The invention discloses a method for rapidly determining ink stability. According to the method, four accelerated aging technical standards are established; a low-field nuclear magnetic analysis method and a multiple light scattering method are applied to the stability research of emulsified ink for the first time; through the quantitative test data, not only can the stability state of the ink beknown, but further the internal structure features of the ink can be better revealed, the research and development period of the emulsified ink is shortened, and powerful technical support is providedfor research and development and production of the emulsified ink.

The invention discloses a method and system for predicting the shortening amount of an earth crust structure based on a rock magnetic experiment, and the method comprises the steps: selecting a target rock sampling region, and carrying out the collection of a standard rock sample in the sampling region; performing a rock magnetic experiment on the standard rock sample in a preset experiment environment, performing residual magnetism analysis on the standard rock sample by adopting a principal component analysis method, and combining a residual magnetism analysis result and a rock magnetic experiment result to obtain a palaeomagnetic pole and a palaeolatitude of the standard rock sample; and performing wrinkle inspection on the standard rock sample to verify the accuracy of the palaeomagnetic pole and the palaeolatitude, and predicting the crustal structure shortening amount by using the palaeomagnetic pole and the palaeolatitude. According to the method, the rock magnetic experiment is performed on the standard rock sample in the preset experiment environment, and the accurate paleomagnetic pole and paleolatitude of the standard rock sample are obtained by combining the residual magnetism analysis result and the rock magnetic experiment result, so that geological mineral engineering is guided through the paleomagnetic pole, the paleolatitude and the crustal structure shortening amount.

(Subject)To provide an electro-magnetic field analysis technique of an electric rotating machine that filters through a specific higher-harmonic at a specific portion.(Construction)The first electro-magnetic field analysis procedure of analyzing the electro-magnetic field in an analysis space based on the first boundary condition in terms of an electro-magnetic variable assigned to the first specific portion in the analysis space; a development procedure 2 of developing the electro-magnetic variable at the second specific portion in the analytic space, obtained in the first electro-magnetic field analysis procedure, into each higher-harmonic component; the second boundary condition setting procedure of assigning an electro-magnetic variable in terms of at least one of the higher-harmonic components, developed from the above electro-magnetic variable, to the second specific portion as the second boundary condition; and a procedure 3 of analyzing the electro-magnetic field of the analysis space based on the first and second boundary conditions are executed on a computer.

The invention relates to a method for recycling hydroxyproline wastewater, in particular to a method for preparing L-alanine by taking hydroxyproline process wastewater as a raw material. L-alanine is prepared by taking the hydroxyproline wastewater as the raw material through a high-temperature oxidization method and then separated and purified through the coupling processes of activated carbon decoloration and concentration, alcohol solution separation and alcohol (ketone) solution recrystallization. It is determined that the obtained product is a pure L-alanine product through nuclear-magnetic analysis and specific rotation determination. According to the method, wastewater recycling is achieved, the wastewater treatment cost is reduced, and the sustainable development goal of resources and environment is achieved.

The invention discloses a magnetic analysis system for high-density sample analysis. The magnetic analysis system comprises a cesium sputter, a cesium sputtering target, an extraction and focusing electrode, an acceleration electrode, a magnetic deflection mass analyzer, a free drift region, a micro-channel plate and a data acquisition card. The system has the advantages of being relatively simplein structure, safe and simple to operate and convenient to repair and maintain; and the beam is high in flow intensity, stable in beam output, high in detection efficiency and high in instrument stability. The system is a modular system, is flexible in use, even can be divided into a plurality of parts to be used independently, and is very convenient to replace and modify modules when equipment is out of service or updated. According to the system, the content of trace (one million) 54Mn, 55Fe, 60Co, 63Ni, 90Sr and 152Eu radionuclides can be measured, high-precision separation of related nuclides can be realized, and the system can be used for measuring nuclide activity and specific activity.

The invention provides a method for detecting the water content and fat content in abalone through a low-field nuclear magnetic resonance technology. The method comprises the following first step of collecting samples, the second step of carrying out low-field nuclear magnetic analysis on the sample, the third step of measuring the samples, the fourth step of establishing a model, the fifth step of evaluating the model, and the sixth step of measuring the water content and the fat content of the samples to be detected. By means of the method, the water content and fat content in abalone can be measured at the same time, detection is rapid and accurate and free of the influence of the surface feature of abalone, and abalone is not damaged in the measuring process.

The invention relates to an optimal selection method of a high-temperature superconducting direct-current cable, which comprises the following steps of: establishing an accurate three-dimensional superconducting cable model by using COMSOL, recording the change of a magnetic field at different winding angles in three-dimensional simulation, recording the change of the magnetic field of a current strip superposed with different harmonic components, and calculating the optimal selection of the high-temperature superconducting direct-current cable. And the magnetic induction intensity is decomposed in parallel and vertical directions, and the per unit value and the reference value which are replaced by the average value of the magnetic induction intensity under different conditions are extracted and compared, so that three-dimensional cable electromagnetic analysis under different conditions can be carried out on cables under different conditions, and the rapidness and the accuracy of cable analysis are effectively improved. Meanwhile, influence factors of anisotropy are analyzed, a basis is provided for winding of the superconducting tape, and the application value of the high-temperature superconducting direct-current cable is explored.

The invention discloses an oxygen ion source based on a solid electrolyte, an ion implanter and an application of the oxygen ion source and the ion implanter in preparation of an SOI wafer. A solid electrolyte material is formed by processing zirconium oxide or cerium oxide powder doped with trivalent rare earth elements in an injection molding manner; and the oxygen ion source based on the solid electrolyte can obtain a high-purity negative oxygen ion beam at a suction electrode. The ion implanter based on the ion source does not need a magnetic analyzer to further screen the extracted ions, and can get rid of the use limitation of the magnetic analyzer, so that the design of the whole ion implanter is greatly simplified, and the energy consumption is greatly reduced.

The invention discloses a method for testing sodium content and sodium distribution, comprising the following steps: S1: preparing a calibration sample and a sample to be tested; S2: putting the calibration sample into a nuclear magnetic analyzer, and measuring the sodium element in the calibration sample Grayscale image; S3: Convert the grayscale image obtained in S2 into a grayscale matrix by digital image processing, calculate the debasing grayscale matrix sum of each calibration sample, and then obtain the sodium mass and debasing grayscale matrix sum The least squares linear regression equation of equation to calculate the sodium content in the sample to be tested. The testing method disclosed by the invention has the advantages of simple operation, short testing time, non-destructive testing, good stability and high precision during multiple tests; for the testing of sodium distribution, the change of sodium with the pickling time can be observed, and pickling quality can be improved.

The invention discloses a method for quickly screening adulterated waste oil in edible oil by using low-field nuclear magnetic resonance. got a T 2 Transverse relaxation time spectrum information is used as the basis for principal component analysis, which can quickly determine whether the oil sample to be tested has waste oil adulteration through the relative position of the sample to be tested on the PCA map, and further through the characteristic parameter value and adulteration The ratio builds a prediction model, and the adulteration ratio in the oil sample to be tested can be calculated through the prediction model. Based on the method provided by the present invention, the identification of waste oil adulterated various edible oils can be realized through the replacement of different qualified edible oil samples, and the selection of low-field nuclear magnetic analyzers of different models and specifications can satisfy waste oil and its The on-site rapid detection of adulterated oil samples and the demand for low detection limit and high sensitivity detection provide an effective solution for the analysis and identification of different occasions and conditions.

The invention relates to a high-precision fusion neutron energy spectrum measuring device and method. The invention aims to solve problems that an existing fusion neutron energy spectrum measuring device and method are only suitable for diagnosis under high neutron yield if a recoil proton magnetic analysis method is adopted, an initial time waveform and a response waveform are difficult to obtain simultaneously and effectively by using the same detection system if a neutron time-of-flight method is adopted, and an initial time waveform and a response waveform are difficult to obtain simultaneously and effectively if different detection systems are adopted; time difference is additionally introduced, so precision of solving flight time broadening, Doppler energy spectrum broadening, fusion plasma temperature characteristics and the like is reduced. The measuring device comprises a hydrogen-rich perovskite scintillator, a photoelectric conversion device, a power supply, an oscilloscope and a computer, a photocathode of the photoelectric conversion device faces the hydrogen-rich perovskite scintillator; an output end of the photoelectric conversion device is connected with an input end of the oscilloscope, and an output end of the oscilloscope is connected with an input end of the computer. The measurement method is carried out by using the high-precision fusion neutron energy spectrum measurement device.

The invention discloses an ion emission method for increasing ion implantation beam. The device comprises an ion source, a first drain, a storage magnetic field and a magnetic analysis component, wherein the first drain is arranged in an outlet direction of the ion source; the storage magnetic field and an outlet of the first drain deflect a certain angle, the angle makes ions passing through the first drain enter the storage magnetic field to carry out circular motion, and the magnetic analysis component is used for detecting and separating the ions in the storage magnetic field; the ions ionized by the ion source are extracted through the first drain; the ions extracted by the first drain enter the storage magnetic field to carry out circular motion; and when the number of the ions in the storage magnetic field reaches a specified value, the ions in the storage magnetic field are released into the magnetic analysis component. According to the ion emission method for increasing the ion implantation beam, which is provided by the invention, the ion implantation beam can be increased, so that the uniformity and the efficiency of an ion implantation process are improved.