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55 results about "Structural evolution" patented technology
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Self-Assembling Cell Aggregates and Methods of Making Engineered Tissue Using the Same
Owner:MUSC FOUND FOR RES DEV +1
Self-assembling cell aggregates and methods of making engineered tissue using the same
A composition comprising a plurality of cell aggregates for use in the production of engineered organotypic tissue by organ printing. A method of making a plurality of cell aggregates comprises centrifuging a cell suspension to form a pellet, extruding the pellet through an orifice, and cutting the extruded pellet into pieces. Apparatus for making cell aggregates comprises an extrusion system and a cutting system. In a method of organ printing, a plurality of cell aggregates are embedded in a polymeric or gel matrix and allowed to fuse to form a desired three-dimensional tissue structure. An intermediate product comprises at least one layer of matrix and a plurality of cell aggregates embedded therein in a predetermined pattern. Modeling methods predict the structural evolution of fusing cell aggregates for combinations of cell type, matrix, and embedding patterns to enable selection of organ printing processes parameters for use in producing an engineered tissue having a desired three-dimensional structure.
Owner:MUSC FOUND FOR RES DEV +1
Method for preparing iron oxide red hybridization pigment by means of clay minerals
ActiveCN105694539ABright colorImprove stabilityPigment treatment with non-polymer organic compoundsClay mineralsStructural evolution
The invention discloses a method for preparing an iron oxide red hybridization pigment by means of clay minerals. According to the method, natural clay minerals are dispersed in water to form suspension liquid after being subjected to breaking, double rolling and ball milling, molysite and auxiliaries are then added, evenly dispersed and transferred into a hydrothermal reaction kettle, pH of the solution is controlled to be 0.5-4, reaction lasts for 5-60 h at the pressure of 2-8 MPa and the temperature of 160-300 DEG C, and programmed cooling is conducted at the rate of 10 DEG C / min to indoor temperature; the solid product is separated, washed, dried and smashed to generate the bright red hybridization pigment. Structural evolution and recombination are induced through hydrothermal reaction, reaction parameters are precisely controlled, exchange is conducted between Fe3+ and ions in clay minerals under the action of auxiliaries, in-situ formation of a crystalline phase is achieved, the novel silicon-aluminum iron oxide red hybridization pigment with bright color, high stability and uniform size is obtained, and the cost-effective red hybridization pigment is provided for multiple fields including coating, paint, ceramic and ink.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for restoring brittleness and plasticity evolution history of petroleum and natural gas cap rocks
ActiveCN104252009AEffectiveness evaluationAssessing the changing characteristics of sealing capacityGeological measurementsMature technologyStructural evolution
The invention provides a method for restoring brittleness and plasticity evolution history of petroleum and natural gas cap rocks, and belongs to the field of oil-gas exploration. According to the method, temperature and stress characteristics of the cap rocks in a specific geological historical period and the resulting changes of plasticity coefficients of the cap rocks are restored, and further, dynamic evolution conditions of brittleness and plasticity coefficients of the cap rocks in different geological historical periods are restored so as to evaluate sealing performance of the cap rocks. By the method, a cap rock effectiveness evaluation system can be formed by combination of mature technology systems in some specific fields, can be used for evaluating effectiveness of the cap rocks in a certain specific geological historical period, and can be combined with structural evolution of basins and stratal up-down history to dynamically evaluate the change characteristic of sealing capability of the cap rocks in the certain geological historical period.
Owner:CHINA PETROLEUM & CHEM CORP +1
Loadable industrial CT (computed tomography) detection device
InactiveCN104122276ASolve the problem that the detection object must be rotatedSolve the problem of having to rotateMaterial analysis by transmitting radiationStrength propertiesComputed tomographyStructural evolution
The invention discloses a loadable industrial CT (computed tomography) detection device, belonging to the technical field of ray nondestructive detection. The detection device comprises a CT scanning device, a frame, a loadable test board, a control device, an image reconstruction device and the like. A ray source and a detector are fixed on a big circular ring; during CT scanning, a tested object is fixed on loadable test equipment and penetrates through the center of the circular ring, and then the circular ring on which the ray source and the detector are arranged is driven to perform precision rotary scanning. Compared with the existing devices, the CT detection device has the advantages that the tested object does not need to rotate and is in a continuously loaded state, and the ray source and the detector synchronously rotate around the tested object, so that CT scanning imaging of the tested object is realized; and non-rotation CT scanning imaging of the tested object and real-time detection in the continuously loaded state can be realized, and a structural evolution process of the tested object in the continuously loaded state is acquired.
Owner:CHONGQING UNIV +1
High-Nb-TiAl alloy diffusion bonding method
ActiveCN103785944AQuality improvementReduce processing costsFurnace typesWelding/soldering/cutting articlesFlow stressAxial pressure
The invention discloses a high-Nb-TiAl alloy diffusion bonding method. According to the method, firstly, vacuum diffusion bonding is carried out on a forged high-Nb-TiAl alloy at a low temperature, and then vacuum annealing treatment is carried out on diffusion bonding samples. By effectively combining high-Nb-TiAl alloy diffusion bonding with vacuum annealing treatment, the joint quality of high-Nb-TiAl alloy diffusion bonding is significantly improved, and the microscopic structure of a weldment can be controlled. Meanwhile, axial pressure stress smaller than alloy flow stress is applied in the diffusion bonding process, so that materials are prevented from being deformed in the diffusion bonding process. The microscopic structure of a diffusion bonding joint obtained through the method is free of unclosed holes, weld interfaces disappear completely, structural evolution is thorough, and the diffusion bonding joint is high in quality.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Constant width film stretching device combined with X-ray scattering, and experimental method thereof
ActiveCN103063689AAchieve stretchAccurate temperatureMaterial analysis using radiation diffractionLabview softwareTwo temperature
The invention provides a constant width film stretching device combined with X-ray scattering, and an experimental method thereof. The device employs two Yaskawa servo motors to drive a ball screw to stretch a sample. The rotation of the motors is controlled by a Labview software. One end of the device is configured to a tension sensor for tracking tension change during a stretching process. During the stretching process, scissor mechanism fixtures are employed perpendicular to the stretching direction, so as to guarantee that the width of the sample can be kept constant during the stretching process and chuck points move uniformly along with the sample. The device employs a forced nitrogen stream to equalize temperature distribution in a sample cabin and reduce thermal degradation of the sample at a high temperature. Two temperature monitoring points are pre-set in the sample cabin. The temperature is precisely controlled by the temperature controller. The device has the advantages of easy disassembly and assembly and the like, is very suitable for combination with synchrotron radiation line stations, and is a very good device for studying the relationship between a structural evolution behavior and the film properties in film stretching and processing.
Owner:UNIV OF SCI & TECH OF CHINA +4
Method for acquiring mobility parameter of re-crystallized structure evolution crystal boundary of metal material
ActiveCN106503397AImprove accuracyMaterial analysis by optical meansDesign optimisation/simulationCrystallization kineticsActivation energy
The invention relates to a method for acquiring a mobility parameter of a re-crystallized structure evolution crystal boundary of a metal material. The method comprises the following steps: (1) performing static re-crystallization or dynamic re-crystallization physical thermal simulation test on a metal material sample; (2) acquiring an average grain size of static re-crystallization or dynamic re-crystallization of the sample by utilizing a microstructure representation test; (3) establishing a re-crystallization dynamical model on the basis of a structural evolution numerical simulation method, wherein the model includes nucleation and growing sub-models; (4) describing a nucleation rate sub-model through a nucleation rate, excluding the parameters, such as nucleation activation energy, difficult to acquire through the test and the parameters without physical significance; (5) expressing the migration rate of the crystal boundary of a re-crystallization growing sub-model by the product of the driving force and the mobility parameter of the crystal boundary, wherein the mobility parameter of the crystal boundary is a unique fitting parameter in the whole model; (6) adjusting the mobility parameter of the crystal boundary by adopting an inverse optimization algorithm, comparing a numerical simulation result with a test result and confirming the parameter when a difference between the numerical simulation result with the test result is less than a threshold value (0.01-0.1).
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Multi-period non-continuity hydrocarbon potential evaluation method for superimposed basin
The invention provides a multi-period non-continuity hydrocarbon potential evaluation method for a superimposed basin, and the method comprises the steps: 1, building a stratigraphic framework, and evaluating the distribution condition of the overlying strata of hydrocarbon source rocks; 2, analyzing the structural evolution history of the basin, and carrying out the dividing of a structural evolution unit; 3, calculating the denudation quantity of an overlying denudated stratum of the hydrocarbon source rocks, and carrying out the prototype basin layer by layer; 4, determining the burial history, geothermal history and hydrocarbon generation history of the hydrocarbon source rocks through employing the above analysis result and combining with the basin simulation technology, and determining a secondary hydrocarbon generation mode; 5, calculating the hydrocarbon generation quantities of a construction unit in different periods, evaluating the modern hydrocarbon generation capability, and determining a beneficial secondary hydrocarbon generation center. The method provided by the invention is clear in thinking, is simple in application, and is feasible for the evaluation of the hydrocarbon potential of the multi-period non-continuity hydrocarbon source rocks.
Owner:CHINA PETROLEUM & CHEM CORP +1
Device for simulating deformation field of different displacement gradients based on seismic exploration
InactiveCN104569354AHigh degree of automationRealize the deformation fieldEarth material testingComputer moduleClassical mechanics
The invention provides a device for simulating a deformation field of different displacement gradients based on seismic exploration and a using method thereof. The simulation device comprises a model module, a driver module and a control module, wherein the model module is used for placing quartz sand (11) and a silica gel material (10) for simulating the basin structure; the driver module is used for applying compression deformation in the x-axis direction or sliding deformation in the y-axis direction or pulling deformation in the z-axis direction to the placed basin model; and the control module is used for controlling a stepping motor by virtue of a computer (9), so that the experimental model generates displacement. According to the device for simulating the deformation field of different displacement gradients based on seismic exploration and the using method thereof, the degree of automation is high, the deformation field in the controlled direction and the gradient change thereof can be realized, structural evolution simulation of the oil-gas-bearing basin is performed, and conditions are provided for intensive development of the analysis of the oil-gas-bearing basin.
Owner:NORTHEAST GASOLINEEUM UNIV +1
Systems and methods for predicting structure and properties of atomic elements and alloy materials thereof
ActiveCN110858505AChemical property predictionMolecular entity identificationAtomic elementStructural evolution
Metallic alloy development has been traditionally based on experimental or theoretical equilibrium phase diagrams and the like. The synthesis, processing and mechanical testing of small and large realsamples are a challenging task requiring huge amount of effort in terms of time, money, resource, tedious testing and processing equipment and man-hour for which conventional Calphad calculations etc. alone do not help much in their local structure and related property prediction. Embodiments of the present disclosure provide simulation systems and methods for structure evolution and property prediction Molecular Dynamics (MD) combined with accelerated Monte Carlo techniques, wherein information on atomic elements and composition specific to alloy material is obtained to generate a MD potential file that is further used to generate a 3D structure file by executing a structure equilibration technique. An optimized evolved 3D structure file is then generated that has atomic positions outputand / or thermodynamic output for predicting properties.
Owner:TATA CONSULTANCY SERVICES LTD
Method for quantitatively determining brittle-ductile critical condition of gypsum rock-carbonatite
ActiveCN105116129ACrisp implementationRealize quantitative evaluationEarth material testingEntrapmentDolomite
The invention provides a method for quantitatively determining the brittle-ductile critical condition of gypsum rock-carbonatite. The method comprises the steps that the gypsum rock-carbonatite is adopted as a sample, and the sample comprises the lithological characters of gypsum containing dolomite, gypseous dolomite, dolomite-quality gypsum rock and dolomite containing gypsum rock; temperature and pressure of a critical construction period of petroleum entrapment evolution according to the history of structural evolution of a basin where the gypsum rock-carbonatite is located, and are adopted as temperature and pressure of experimental simulation; the maximum differential stress value and the maximum inflection point stress point of the sample are measured under simulation temperature and pressure respectively; the critical position of conversion of the brittleness and tenacity of the sample is quantitatively evaluated according to the maximum differential stress value and the maximum inflection point stress point of the sample, and the brittle-ductile critical condition of the gypsum rock-carbonatite is quantitatively determined. According to the method, the brittle-ductile critical condition of the gypsum rock-carbonatite can be accurately evaluated, and a basis is provided for accurately evaluating and predicting petroleum entrapment of the gypsum rock-carbonatite.
Owner:PETROCHINA CO LTD
Method for splicing 3D seismic data convergence region structure diagrams
InactiveCN107479095AHigh precisionImprove accuracySeismic signal processingHorizonStructural evolution
The present invention provides a method for splicing structural maps of the three-dimensional seismic data intersection area. The method for splicing the structural maps of the three-dimensional seismic data intersection area includes: step 1, understanding the basic geological situation of the research area, and collecting relevant data on structural evolution; Track and interpret different 3D seismic data for the same target horizon; step 3, interpret faults of different 3D seismic data for the same horizon; step 4, integrate different 3D interpretation results; step 5, perform depth domain conversion to form a structure picture. The structural map mosaic method of the 3D seismic data intersection area directly converts the interpretation results of the intersection area into geological language through the splicing of the interpretation results, effectively reducing the artificial errors and deviations in the structural map mosaic, and obtaining higher accuracy and precision. Structural maps can guide oil and gas exploration work more effectively.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for determining time series of oil and gas charging in ore-bearing formations of shallow layer of basin margin
ActiveCN109725355AAvoid difficultiesMaterial analysis using wave/particle radiationSeismic signal processingApatiteChloroform
The invention belongs to the technical field of a sandstone-type uranium deposit in a basin, and specifically discloses a method for determining a time series of oil and gas charging in ore-bearing formations of a shallow layer of a basin margin. The method comprises the following steps: (1) determining a working area and a target layer, and determining the target layer geologic age range is t0-t0'; (2) performing a sample collection in a circled work area; (3) selecting apatite and extracting a chloroform pitch A from the collected samples; (4) performing a inversion of a history of structural evolution and an oil source analysis on the sample, and screening a sample having a common single source; (5) performing the organic matter Re-Os dating of the chloroform pitch A on the homologous and single source sample, comparing an obtained age data tn with the age t0 of the formation target layer, and retaining the age of tn<=t0; and obtaining the oil and gas charging time (t) order according to whether the retention age is in a strong tectonic activity period. The method can accurately identify the period and time of the oil and gas charging in a prospecting target layer of a shallow layer of a petroliferous basin margin.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Shale gas multi-factor area selection and evaluation method based on fuzzy matrix
InactiveCN107589236ASolve the technical problems of constituency evaluationSpeed up constituencyEarth material testingGeological measurementsKinematicsStructural evolution
The invention discloses a shale gas multi-factor area selection and evaluation method based on fuzzy matrix. The method comprises the following steps: step one, studying the geometric features, formation mechanism, and basin properties of basin controlling fracture, and establishing a static geologic model; step two, studying the kinematics features of basin controlling fracture, and analyzing thehistory of structural evolution, burial history of shale, and hydrocarbon generation history of shale; step three, extracting shale static / kinetic evaluation features, defining various parameters ofthe shale gas area selection and evaluation, and assigning the parameters; step four, establishing a fuzzy matrix, and carrying out multi-factor evaluation; and step five, determining the prospectivearea and favorable area based on the results of shale gas area selection and evaluation. The multi-factor area selection and evaluation method has the advantages that various static / kinetic parametersduring the shale gas formation and enrichment process are integrated, a mathematic method based on a fuzzy matrix is used to carry out area selection and evaluation, the artificial interference is reduced maximally, and the method has an important meaning for the shale gas area selection and exploration.
Owner:OIL & GAS SURVEY CGS
Method for evaluating favorable reservoir formation zone of ancient buried hill
The invention relates to a method for evaluating a favorable reservoir formation zone of an ancient buried hill. The evaluation method comprises the following steps: determining a zone where high-quality source rock develops in a basin and a stratum position where the high-quality source rock is located; determining the main hydrocarbon expulsion threshold depth of the high-quality source rock; determining the current ancient buried hill structure characteristics of the basin according to the seismic profile structure interpretation result; constructing evolution profiles of the basin in different periods to research the evolution history of the ancient buried hill, determining the thickness of the layer, in lateral contact with the ancient buried hill, of the high-quality source rock contained in the depth range of the main hydrocarbon expulsion threshold, determining the lateral contact time of the high-quality source rock in different layers and the ancient buried hill, and establishing the reservoir forming probability of the ancient buried hill and favorable zone optimization. According to the evaluation method, the reservoir forming probability of the ancient buried hill is evaluated by researching the effective contact area and time period of the ancient buried hill and high-quality source rock according to the development characteristics of the ancient buried hill in different structural evolution periods in combination with the main hydrocarbon expulsion threshold depth of the high-quality source rock, so that optimal evaluation of the basin ancient buried hill iscarried out.
Owner:CHINA PETROLEUM & CHEM CORP +1
Device and method for estimating soil structural evolution online in real time based on unmanned aerial vehicle
InactiveCN106053466ADisturbance does not occurImprove test accuracyMaterial analysis by optical meansRemote controlStructural evolution
The invention discloses a device and method for estimating soil structural evolution online in real time based on an unmanned aerial vehicle; the device comprises the unmanned aerial vehicle, a telescopic device, a micro-distance video and image acquisition device, a first signal receiver, a second signal receiver, and a remote control computer; the method comprises: first, establishing a micro-distance video gray image database; second, establishing in the database, a correspondence between substances and a gray value range; third, calculating in the micro-distance video gray image, a number of pixels representative of the substances in the gray value range, and establishing a relation with corresponding substance contents or forms; fourth, determining actual characteristic parameters of a soil body to be detected according to the above relation so as to determine development state of the soil body. Micro-distance video estimation is performed on a soil sample in situ, testing precision is high, and soil body composition and its evolution identification are more accurate; it is possible to perform large-range long-term continuous real-time online monitoring for a soil body where a human body and an axle-driven vehicle cannot reach easily, and evolution law of the soil body in the area is obtained.
Owner:WUHAN UNIV
Synchrotron radiation in-situ test device for catalyst in fuel cell catalyst layer
ActiveCN109470725AReal-time detection of structural evolutionAvoid absorptionMaterial analysis using wave/particle radiationElectricityFuel cells
The invention provides a synchrotron radiation in-situ test device for a catalyst in a fuel cell catalyst layer. The synchrotron radiation in-situ test device comprises a synchrotron radiation light source (1), a front ionization chamber, an in-situ cell and a rear ionization chamber or a fluorescent detector (7), wherein X rays emit from the synchrotron radiation light source (1) and emit onto the rear ionization chamber or the fluorescent detector (7) via the front ionization chamber and the in-situ cell. The in-situ cell comprises working electrode sides and auxiliary electrode sides; and the working electrode side is connected with the auxiliary electrode side by virtue of a through-hole mechanism and a connecting piece (15). The synchrotron radiation in-situ test device for the catalyst in the fuel cell catalyst layer provided by the invention is applicable to the electrocatalytic reaction in-situ cell for in-situ synchrotron radiation XAFS detection, so that a key technical problem of real-time detection of structural evolution of the catalyst is realized.
Owner:SHANGHAI JIAO TONG UNIV
Analysis and evaluation method for structural evolution of DNAPL contaminated cohesive soil
PendingCN111007095AMaterial analysis using wave/particle radiationPreparing sample for investigationSoil scienceFreeze-drying
The invention discloses an analysis and evaluation method for structural evolution of DNAPL contaminated cohesive soil. The method comprises the following steps: determining environmental basic data of a target site; collecting a pollution-free cohesive soil undisturbed soil sample and a DNAPL polluted cohesive soil undisturbed soil sample in the target soil layer; respectively cutting the obtained undisturbed soil sample into pollution-free cohesive soil particles and DNAPL polluted cohesive soil particles with sizes required by an electron microscope scanning test and a mercury injection test, and carrying out freeze drying; then carrying out an electron microscope scanning test on the pollution-free cohesive soil particles and the DNAPL polluted cohesive soil particles; carrying out a mercury injection experiment on the freeze-dried pollution-free cohesive soil particles and DNAPL polluted cohesive soil particles; and according to the results of an electron microscope scanning testand a mercury injection test, analyzing the microstructure change of cohesive soil so as to evaluate influence of the cohesive soil on pollutant migration. The method has the advantages that the cohesive soil before and after DNAPL pollution is studied through electron microscope scanning and mercury injection experiments, and the method has significance in mastering microstructure evolution and migration characteristic changes caused by interaction of the cohesive soil and organic pollutants.
Owner:SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
Rock shear test system
ActiveCN109374438ARealize functionReduce the number of configurationsMaterial strength using steady shearing forcesRock engineeringHydraulic engineering
The invention relates to the field of testing equipment of rock mechanics and provides a rock shear test system. According to the rock shear test system, the problems that the internal deformation mechanism and structural evolution of rocks in the shear breakage process cannot be known in the prior art are solved. The rock shear test system comprises a loading device and a driving device, whereinthe loading device comprises a loading bin which is configured to apply a shear force to a rock test piece; and the driving device is connected with the loading bin and is used for driving the loadingdevice to drive the rock test piece to rotate. According to the rock shear test system, the functions of a rock shear test machine are realized, the internal deformation mechanism and structural evolution of the rocks in the shear breakage process can be acquired through lossless CT scanning, the rock shear breakage process can be dynamically observed, and the reference basis is provided for solving the rock engineering problems in construction projects of hydraulic engineering and buildings.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
High-performance fiber drying detection testing machine
ActiveCN101871860ADetecting Structural EvolutionOvercome the lack of guaranteed qualityPreparing sample for investigationFiberDry box
The invention provides a high-performance fiber drying detection testing machine which comprises a stand, a drying mechanism, a winding mechanism and a translation mechanism; the drying mechanism comprises a drying box body, a heating box, a silk supporting roller, a return air pipe, a fan and a pressure-equalizing box; a box door which is provided with a testing port is installed on the front surface of the drying box body; a return air inlet and the pressure-equalizing box are respectively arranged at the top and the bottom of the drying box body; a pressure-equalizing distribution outlet net plate and a static-pressure distribution inlet net plate are arranged above the pressure-equalizing box; the winding mechanism is installed at one side of the silk outlet of the drying box body; and the translation mechanism is used for the horizontal movement of the drying box body. The invention has reasonable structure and convenient operation, can be matched with a synchrotron radiation device, can accurately detect the structural evolution condition of a high-performance fiber silk bundle in the drying process in time, supplies a strong technical support for the drying process design of high-performance fiber production, and overcomes the defects that the debugging period of a trial and error method is long and the fiber quality can not be ensured.
Owner:JIANGSU SHENTAI SCI & TECH DEV
Experimental device and method for carrying out simulation study on heat exchange and geometric structural evolution of foam fracturing fluid in fracture passage
ActiveCN110530760AEasy to cleanSimple structureFlow propertiesMaterial heat developmentHeat flowGas cylinder
The invention discloses an experimental device and method for carrying out simulation study on heat exchange and geometric structural evolution of foam fracturing fluid in a fracture passage. The experimental device comprises a solution storage box, a gas cylinder, a foam generator, a fracture simulation device and a recorder, wherein the solution storage box is used for storing aqueous solution of a surfactant; the gas cylinder is used for storing and supplying gas for generating foam; the foam generator is used for generating the foam; the fracture simulation device is transparent; a passageis formed in the fracture simulation device and used for simulating a stratum fracture with heat flow; both a width and an inclination angle of the passage for simulating the stratum fracture are adjustable; a heating plate is arranged in the passage for simulating the stratum fracture; a plurality of thermocouples are arranged on the heating plate; and the recorder is used for recording data acquired by the thermocouples. The experimental device and method disclosed by the invention can simulate to carry out study on multi-phase flowing and convective heat exchange characteristics of the foam fracturing fluid with different parameters in the stratum fractures with different widths and inclination angles.
Owner:XI AN JIAOTONG UNIV
Method for in-situ study of amorphization mechanism of germanium-antimony-tellurium material under electron beam irradiation
InactiveCN110554060AAvoid molten stateUniversalPreparing sample for investigationMaterial analysis by transmitting radiationDirect observationTe element
The invention discloses a method for in-situ study of an amorphization mechanism of a germanium-antimony-tellurium material under electron beam irradiation. The method comprises the following steps: selecting a germanium-antimony-tellurium crystal thin film of which the surface is deposited on a carbon supporting film copper carrying net with a standard size of a transmission electron microscope;carrying out surface pretreatment on the prepared film sample by adopting a plasma cleaning technology, and carrying out plasma cleaning by selecting argon; placing a pretreated electron microscope sample in the transmission electron microscope, and searching an area which is smooth in surface, free of carbon deposition, pollution and damage and uniform in thickness in the thin film sample to serve as an irradiation area; setting irradiation parameters, and inducing the material to be gradually amorphized; and observing and recording the evolution process of the amorphous structure of the material in situ, and analyzing the amorphous phase change mechanism of the material. According to the method, the gradual amorphization of the germanium-antimony-tellurium material is realized through electron beam irradiation, and the structural evolution process of the material amorphization is directly observed and analyzed by virtue of the transmission electron microscope, so that the convenientresearch method and a reliable experimental basis are provided for exploring the amorphization mechanism of the germanium-antimony-tellurium material.
Owner:XI AN JIAOTONG UNIV
A Method for Obtaining Mobility Parameters of Grain Boundary in Metal Material Recrystallization Microstructure Evolution
ActiveCN106503397BImprove accuracyMaterial analysis by optical meansDesign optimisation/simulationCrystallization kineticsActivation energy
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
Method for describing structure-activity evolution of polyurethane material through molecular simulation technology
PendingCN113990402ARealize the establishmentEfficient constructionComputational theoretical chemistryInstrumentsPolymer scienceLinear correlation
The invention relates to a method for describing structure-activity relationship evolution of a polyurethane high polymer material through a molecular dynamics simulation technology. According to the method, a relatively reasonable initial mixing model is constructed, and a truncation radius and a labeled atom are taken as reflection criteria, so that a set of method related to the random bonding model of the polyurethane high polymer material is established. Technical support is provided for research on structural evolution and performance evolution in the reaction process of the polyurethane material, and meanwhile, a thought is provided for construction of some relatively complex random models. According to the invention, the linear correlation between the glass transition temperature and Young modulus of the polyurethane material and the reactivity is proved by calculating the evolution of the glass transition temperature of the polyurethane material with different reactivity and simulating uniaxial tension. And meanwhile, the feasibility of the modeling method of the polyurethane random crosslinking model is also proved.
Owner:EAST CHINA UNIV OF SCI & TECH
Parallel solving method for simulating dislocation motion of nuclear reactor key material
ActiveCN111783284AIncrease stressEasy to operateDesign optimisation/simulationSpecial data processing applicationsNuclear reactorEngineering
The invention provides a parallel solving method for simulating dislocation motion of a nuclear reactor key material. The parallel solving method can improve the solving speed. The method comprises the steps that S1, adding astress to a dislocation line, updating point defects on the dislocation line at the same time, and simulating dislocation motion and a calculation model of interaction betweenthe dislocation motion and the point defects on the mesoscopic scale; S2, dividing all structural evolution mechanical equations in the calculation model into a plurality of processes, and solving the structural evolution mechanical equations in parallel to obtain a resultant line tension force applied to each point defect by a dislocation line; S3, judging whether a pinning removing or bypassingcondition is met according to the obtained resultant line tension, and if not, returning to the step S1; if yes, resetting the stress to 0, and returning to S1; and S4, circularly executing accordingto the steps S1-S3 until the dislocation line passes through all point defects on the sliding plane. The invention relates to the field of nuclear materials.
Owner:UNIV OF SCI & TECH BEIJING
Fracture prediction analysis method based on structural evolution stratum strain
The present invention discloses a fracture prediction analysis method based on structural evolution stratum strain. The method comprises the following steps of: performing horizon calibration of a work area; picking up a seismic data target horizon and all the horizons on the target horizon; calculating transmutation difference of the target horizon and all the horizons on the target horizon; calculating the maximum positive curvature and the maximum negative curvature of the transmutation difference, and rejecting a singular value; determining a fracture development area and a relative development degree according to the size of a curvature value; and overlapping the prediction areas to obtain the fracture development condition of the target stratum. The method considers the stratum strain condition of the target horizon in the evolution processes of different geological historical periods, can estimate the positions of the fractures being possibly to be developed and development degrees, can reveal the hidden fracture development positions, can eliminate the influence of the abnormal value and can be used for two-dimensional and three-dimensional seismic work area.
Owner:CHENGDU NORTH OIL EXPLORATION DEV TECH
Constant width film stretching device combined with X-ray scattering, and experimental method thereof
ActiveCN103063689BEfficient use ofRealize continuous temperature controlMaterial analysis using radiation diffractionTemperature controlExperimental methods
The invention provides a constant width film stretching device combined with X-ray scattering, and an experimental method thereof. The device employs two Yaskawa servo motors to drive a ball screw to stretch a sample. The rotation of the motors is controlled by a Labview software. One end of the device is configured to a tension sensor for tracking tension change during a stretching process. During the stretching process, scissor mechanism fixtures are employed perpendicular to the stretching direction, so as to guarantee that the width of the sample can be kept constant during the stretching process and chuck points move uniformly along with the sample. The device employs a forced nitrogen stream to equalize temperature distribution in a sample cabin and reduce thermal degradation of the sample at a high temperature. Two temperature monitoring points are pre-set in the sample cabin. The temperature is precisely controlled by the temperature controller. The device has the advantages of easy disassembly and assembly and the like, is very suitable for combination with synchrotron radiation line stations, and is a very good device for studying the relationship between a structural evolution behavior and the film properties in film stretching and processing.
Owner:合肥中科优材科技有限公司
Method and device for determining dynamic change process of ancient karst diving surface
PendingCN114764153AClear distributionImprove distributionEducational modelsGeological measurementsSoil scienceVadose zone
The invention provides a method and device for determining the dynamic change process of an ancient karst diving surface, and the method comprises the steps: determining the structural evolution history of a target layer of a research area, and determining the lifting of the ancient karst diving surface of the target layer in a supergene karst period; establishing an ancient karst zone identification and division template; according to the ancient karst zone identification and division template, carrying out different single well vertical ancient karst zone division in a research area, and determining an earth surface karst zone, a vertical seepage zone, a transition zone, a horizontal subsurface flow zone and a deep slow flow zone in each well; dividing a single transition zone in the transition zone, identifying the ancient karst phreatic surface, and determining the vertical change process of the ancient karst phreatic surface of a single well; well-connected karst zone comparison is carried out, and the lateral distribution range of the ancient karst phreatic water surface in the same period is analyzed; and in combination with the ancient karst landform, analyzing the relationship between the ancient karst phreatic surface and the ancient karst landform, determining the longitudinal development position and the transverse distribution range of the ancient karst phreatic surface in different periods, and determining the dynamic change process of the ancient karst phreatic surface.
Owner:PETROCHINA CO LTD
A simulation method and system for the evolution of material structure caused by irradiation
ActiveCN109727647BComputational theoretical chemistryChemical machine learningMolecular staticsDynamic models
The invention provides a method and a system for simulating material structure evolution caused by irradiation. The method comprises the steps of acquiring cluster components, in-cluster atom distribution and cluster geometric structure on the condition of different defect concentrations and different element contents; acquiring the geometric structure and the cluster components of the cluster with lowest energy in the clusters on the condition of different defect concentrations and different element contents; calculating formation energy, binding energy and diffusion barrier of the cluster with the lowest energy through a modular statistics method; obtaining a cluster forming path of the cluster with lowest energy; and establishing a dynamics model of the material structure evolution caused by irradiation.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
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