227results about How to "Low requirements for experimental conditions" patented technology

The invention discloses a corona aging acceleration device and a corona aging acceleration method for a polymer insulating material. The device comprises a sealed corona aging experimental case in which a pin array electrode and a metal plate electrode are arranged, wherein the pin array electrode is connected with a high voltage generation device; the metal plate electrode is grounded; a pinpoint array is arranged on the pin array electrode; a test sample is arranged on the metal plate electrode, and is opposite to the pinpoint array; and after voltage is applied, uniform corona discharge is generated between the pin array electrode and the metal plate electrode to perform corona aging on the test sample. The device and the method have the advantages of low requirements on experimental conditions, convenience for operation and quantitative control over aging factors in an experiment, and short experimental period, and are applied to researches on the corona aging resistance of insulating materials in a laboratory.

The invention relates to a graphene / titanium dioxide composite material, a preparation method and application thereof. The graphene / titanium dioxide composite material comprises: graphene and titaniumdioxide particles closely attached to the graphene sheet. According to the invention, graphene and titanium dioxide are selected for compounding to obtain an efficient photocatalyst with the excellent properties of graphene and titanium oxide simultaneously.

The invention discloses an optical phase delay precision measuring method and a system thereof. The system of the invention comprises a laser, a polarizer, a photo-modulator, a modulation signal source, a measuring phase retarder, a phase compensator, a polarization analyzer, an optical detector and a result output unit. The method of the invention is as follows that the optical modulator is added into a light path for optical modulation of detection polarized light and then modulation polarized light is generated; a result display unit realizes conversion from measurement of direct current zero point to measurement of alternate current zero point after conducting filtering process of the received signal, therefore, the position of an extreme point can be determined accurately and the measuring precision can be improved. The measurement of the invention is simple and convenient and the result is accurate and reliable, meanwhile, the precision is up to lambada / 300; the invention is suitable for production of a wave plate and other optical delay devices and detection of the product in the sales department.

The present invention relates to a Mueller matrix self calibration measurement method, the biggest characteristic of a Mueller matrix measurement method in the prior art is the need of precision calibration of an optical system of a measuring device, and the difficulty of precision measurement of a Mueller matrix is increased. According to the Mueller matrix self calibration measurement method, Stokes parameters of output polarization states before and after a to-be-test sample is put in are measured, a formula of the functional relationship between measured output light intensity and unknown parameters of a system and a Mueller matrix of a measured sample is established, and the Mueller matrix of the to-be-test sample is obtained by solution with a multiple-parameter nonlinear fitting method. The Mueller matrix self calibration measurement method needs no precision calibration of the measurement system, and realizes the self calibration measurement of the Mueller matrix, and the measurement method is simple and easy to operate, and can be widely used in Mueller matrix measurement of various polarization components and optical systems.

The invention provides a lithium metal oxide composite positive electrode material with a multilayer structure, a precursor material for constituting the same, and a preparation method and an application for the precursor material. The invention relates to the lithium metal oxide composite positive electrode material used for a lithium ion battery, and a preparation method and an application for the lithium metal oxide composite positive electrode material. The invention aims to solve the ubiquitous problems of low specific capacity, bad cycling performance, high improvement cost and low tap density existing in the lithium metal oxide composite positive electrode material. According to the preparation method, primary granules are controlled in real time to be arranged based on layers in a coprecipitation method reaction process by enabling metal salt solution components to be subjected to stage changes and cease type overflowing; the metal salt components of the primary granules in each layer are different; a precursor of the high-performance lithium metal oxide composite positive electrode material with the multilayer structure is obtained; and the lithium metal oxide composite positive electrode material with the multilayer structure is finally synthesized by the combination of a gradient temperature rise way. The lithium metal oxide composite positive electrode material is used for the lithium ion battery.

The invention relates to a method and a system for precisely measuring phase delay of a wave plate. The system comprises a light source, wherein an optical fiber coupler, a polarizer, a compensator, a sample to be tested, a polaroid, an analyzer, an imaging lens, a monochromator and a detector are arranged sequentially on the forward direction of the light emitted by the light source; the compensator is driven by a motor controlled by a computer to rotate; the output of the detector is transmitted to the computer for data process via a data acquisition card; the computer controls the monochromator through the data acquisition card to select wavelength; and the computer transmits a pulse signal to the motor through the data acquisition card to drive and control the motor to rotate the compensator in fixed step length. The method comprises the following steps of: establishing four non-linear equations by using the phase delay of the wave plate as an unknown parameter on the basis of rotating an ellipsometer of the compensator; and evaluating to obtain the phase delay of the sample to be tested. By the measuring process, the self-calibration of the phase delay of the compensator is realized and the system error caused by inaccurate calibration is eliminated. By a three-step measuring method, the influence of the azimuth angle error of the polarizing component of the system is eliminated.

The invention discloses a preparation method of an environmentally-friendly micron-size triangular silver sheet. The method comprises the following steps of: preparing a silver nitrate oxidation liquid and a reduction liquid containing polyvinyl pyrrolidone (PVP) and D(+)-dextrose, stirring at room temperature and dropwise adding the silver nitrate oxidation liquid into the reduction liquid to obtain a uniform yellow solution; placing the obtained mixed liquor into a drying oven, preserving heat at the temperature between 75 DEG C and 95 DEG C for 48-72 hours to obtain a silver-gray fulmarginsolution; cooling and standing the fulmargin solution, centrifuging and separating; washing nano silver powder obtained by centrifuging with acetone and cold ethanol respectively; and re-dispersing the washed nano silver powder into the ethanol for later use. The prepared micron-size triangular silver sheet has the advantages of high yield, regular shape, difficulty in aggregating, high stability, simple synthesizing process, environmentfriendliness and preparation on a large scale.

The invention relates to activated carbon, a preparation method thereof, and application of the activated carbon in a supercapacitor electrode. The method comprises the following steps of firstly drying, smashing and sieving an activated carbon raw material; then uniformly mixing the treated activated carbon raw material and an activating agent according to a certain mass ratio, under the protection of an inert atmosphere, heating in a sealed furnace body for carrying out activating agentmelt-impregnation, and then continuously warming for activating; purifying, ball-milling and sieving an obtained activated product, and finally carrying out high-heat treatment under the protection of an inert atmosphere to obtain the activated carbon. The specific surface area of the activated carbon provided by the invention is larger than 2000m<2> / g, and the specific surface area and the pore size distribution are controllable. The mass ratio capacitance of a supercapacitor prepared by adopting the activated carbon provided by the invention and a TEABF4 / PC organic system is larger than 130F / g. In addition, the activated carbon provided by the invention is simple in production process, low in preparation cost, short in period, good in comprehensive economic benefit, and easy to realize industrial production.

The invention provides a zinc oxide / bismuth vanadate heterojunction film with a characteristic of visible light responding, and a preparation method and applications thereof. The preparation method comprises the following steps: at first, preparing a BiVO4 precursor solution and a ZnO precursor solution, then soaking a substrate into the BiVO4 precursor solution to prepare an amorphous BiVO4 film with a certain thickness by utilizing a reverse layer-layer self assembly technology utilizing a hydroxyl layer electrostatic adsorption effect, irradiating the amorphous BiVO4 film by UV rays to form a hydroxyl layer, then soaking the substrate into the amorphous BiVO4 film to carry out secondary reverse layer-layer self assembly to form a BiVO4-ZnO amorphous film, and finally carry out crystallization at a constant temperature of 500 DEG C to obtain the zinc oxide / bismuth vanadate heterojunction film. The process is simple and controllable, the requirements on experiment conditions are low, and the prepared zinc oxide / bismuth vanadate heterojunction film has a wide application prospect in the photocatalysis field.

The invention provides a vibration mode parameter identification method based on a state observer, belongs to the field of vibration mode analysis, and relates to the vibration mode parameter identification method based on the state observer. The method aims at a specific structure and a concerned vibration order, firstly an ANSTS mode is used for analysis, the vibration frequencies and vibration modes of all orders are approximately obtained, then a free vibration experiment is established, a plurality of non-contact high-resolution laser displacement sensors are adopted to measure structure displacement signals, and a mode state space equation and a state observer of the whole system are built. After the state observer is adopted to obtain free vibration mode coordinates of all orders, an FIR filter is adopted to filter out interference signals. Finally, the sinusoidal function with exponential attenuation is adopted to fit filtered mode coordinates, and the precise frequency and damping ratio of vibration of all orders are obtained. The vibration mode parameter identification method is easy to achieve, accurate in identification, high in universality, and suitable for vibration mode parameter identification of various structures.

The invention provides a method for preparing bismuth tungstate film photochemical catalyst in a sol-gel method, which uses five-water bismuth nitrate and two-water sodium tungstate as raw materials. The five-water bismuth nitrate and the two-water sodium tungstate are respectively dissolved in ethylene glycol solvent, magnetic stirring is conducted on the five-water bismuth nitrate and the two-water sodium tungstate at the room temperate and the temperature of 80 DEG C respectively so as to enable the five-water bismuth nitrate and the two-water sodium tungstate to be dissolved to form solution A and solution B, the solution A is added in the solution B, a complexing agent of citric acid and a stabilizing agent of acetylacetone are added in the solution B to be stirred continuously so as to enable the raw materials to be mixed evenly, and a stable Bi2WO6 precursor is obtained. A film is prepared by using a dip-coating method, lifting speed is 3cm / min, the film is dried for 30 min at the temperature of 80 DEG C after lifting is finished, and annealing is performed for 100-200 min at the temperature of 450-500 DEG C after 15-20 times of lifting. The method is simple in preparation process, low in temperature during the process and short in period. The prepared film is uniform and compact.

The invention discloses core-shell ceramic microspheres and a preparation method thereof, and belongs to the technical field of ceramic microspheres; a method combining an emulsion technique and a precursor transformation method is adopted for preparation. The preparation method comprises the steps: firstly, carrying out surface modification of SiO2 with a silane coupling agent, dispersing the modified SiO2 in an aqueous phase system by the emulsion method, dropping an oil phase ceramic precursor polysiloxane, carrying out ultrasonic dispersion to obtain a uniform emulsion, and carrying out a hydrothermal reaction in a high-pressure kettle to obtain SiO2 / PSN microspheres; and then sintering the microspheres in a vacuum furnace, cracking polysilazane at high temperature to form a SiCN ceramic, and thus obtaining the SiO2 / SiCN core-shell ceramic microspheres. The preparation method is simple and has excellent performance; the surface of the SiO2 microspheres is coated with a layer of non-oxidized SiCN shell, and thus the high-temperature heat-insulation performance of the SiO2 based core-shell structure microspheres can be improved.

The invention belongs to the technical field of perovskite-like nanocrystals. The invention discloses a preparation method of Cs<3>Cu<2>X<5> nanocrystalline and a product. The preparation method comprises the steps that indium halide InX3 or zinc halide ZnX2 is additionally introduced into a precursor solution for preparing Cs<3>Cu<2>X<5> nanocrystalline through a thermal injection method, preparing the Cs<3>Cu<2>X<5> nanocrystalline through a thermal injection method, wherein X is selected from Cl, Br and I. According to the preparation method, a key precursor for regulating and controlling the growth of the nanocrystalline in the preparation method of the nanocrystalline is improved; indium halide or zinc halide is used as an additive in a precursor, and a copper element is used as a substitute of a lead element, so that the preparation of the lead-free metal halide light-emitting nanocrystal is completed, the preparation process is easy to implement, the cost is low, and meanwhile,the defects of the lead-containing halogen perovskite nanocrystal can be overcome.

The invention relates to a nitrogen-doped graphene / nano titanium dioxide photocatalyst as well as a preparation method and application thereof. The nitrogen-doped graphene / nano titanium dioxide photocatalyst contains nitrogen-doped graphene, and titanium dioxide supported to the nitrogen-doped graphene, wherein the nitrogen-doped graphene contains a nitrogen source; the nitrogen source comprises graphite nitrogen and pyrrole nitrogen; and a mass ratio of the nitrogen-doped graphene to titanium dioxide is (0.005-0.05):1, preferably (0.01-0.02):1.

The invention discloses a method for measuring contents of ferrous ions and iron ions in glass, comprising the following steps: measuring the absorption spectrum of a provided glass sheet within the waveband range of 350-1100nm by using an ultraviolet and visible spectrophotometer; dividing the absorbency data in the absorption spectrum by the thickness of the glass sheet to obtain the absorbency of glass sheet with unit thickness, thereby further obtaining the spectrum curve of relationship between the wavelength in the absorption spectrum and the absorbency of the thickness of the glass sheet; carrying out smoothing treatment and basic line correction on the spectrum curve successively; and carrying out area integration on the spectrum curve after line correction respectively within the waveband range of 370-400nm and within the waveband range of 520-1100nm, and calculating the contents of iron ions and ferrous ions according to corresponding integrated areas. By using the method, the contents of iron ions and ferrous ions can be measured simultaneously, the operation is simple and fast, data processing is simple and convenient, and the reliability and the repeatability are good, therefore, the method can meet on-line monitoring requirement of glass and is applicable to industrial popularization.

The invention relates to a method for preparing Si-C-N-based ceramic microspheres. The method comprises the following steps: dissolving polysilazane and polystyrene at a certain ratio as well as organic metal compounds into an appropriate solvent through a solution mixing process, performing solvent evaporation for causing phase separation of a polymer mixed system so as to obtain ceramic precursor spherical droplets, then performing low-temperature crosslinking to solidify the spherical droplets into microspheres, and performing centrifugal separation and pyrolysis, thereby obtaining the Si-C-N-based ceramic microspheres. The method is simple to operate, low in requirement on experiment condition and suitable for preparing ceramic microspheres of various materials, and just comprises a few of steps; the prepared ceramic microspheres are regular in shape and smooth in surface; the method can be widely applied to preparation of ceramic microspheres of multiple components.

The invention provides a separation method for mouse female germline stem cells in the technical field of transgenosis engineering. The separation method comprises the following steps: step one, collecting a mouse ovary, and adopting a two-step enzymic digestion method for preparing germline stem cell suspension; and step two, adding mvh first antibody and then second antibody magnetic bead in the cell suspension and re-suspending the cells, thus separating the female germline stem cells. The invention also provides a culture in vitro method for the mouse female germline stem cells, which comprises the following steps: transferring the female germline cells on an STO cell culturing layer, adding female germline stem cell culture solution, and conducting primary culture and subculture on the female germline stem cells, thus obtaining purified and stable germline stem cells. In the method, the mouse female fermline stem cells are separated and cultured in vitro successfully at first time, the methods are simple, the cost is low, the requirements on experiment conditions are low, and the operability is strong.

The invention relates to a method for identifying waste oil by using Caenorhabditis elegans dormancy as a biological marker, and relates to a waste oil identifying method. The method of the invention solves the problems of low sensitivity, poor accuracy, complex operation and high cost existed in the current waste oil identification method. The method comprises the following steps: 1, uniformly mixing NaCl, agar powder, peptone, a CaCl2 aqueous solution, a MgSO4 aqueous solution, a phosphate buffer and distilled water to obtain a nutrient solution, then sterilizing, and drying to obtain a medium; and 2) coating escherichia coli OP50 bacterial liquid in a prepared medium in the step 1), culturing for certain time, and culturing Caenorhabditis elegans larva for 46 hours. The method has the following advantages that 1, effective identification of high refining waste oil with low specific component trace can be realized; and 2, the operation is convenient, the cost is low, the method is easy to train and grasp. The method of the invention is mainly used for identifying the waste oil.

The invention discloses a conjugate two-component solvent-free electrospinning nanofiber and a preparation method and device thereof. By means of special material electrospinning nanofiber obtained through two-component solvent mixing, reacting and curing, the application fields of solvent-free electrospinning are widened. The device comprises two liquid storage mechanisms which are each connectedwith a spinning spray head and both connected with a driving mechanism driving liquid to enter the spinning spray heads, injection openings of the two spinning spray heads are opposite, one of the spinning spray heads is electrically connected with the positive electrode of a positive high voltage power supply, the negative electrode of the positive high voltage power supply is grounded, the other spinning spray head is electrically connected with the negative electrode of a negative high voltage power supply, the positive electrode of the negative high voltage power supply is grounded, and grounded collection electrodes are arranged under the two spinning spray heads. Accordingly, the preparation method is simple, the device is simple in structure, the experiment condition requirements are low, the raw material utilization rate is high, and a very good application prospect is achieved.

The invention discloses a method for preparing a patterned ZnO film by a liquid phase self-assembly technology. Zn(NO3)2.6H2O and NH4F, as raw materials, are dissolved in distilled water to prepare precursor liquid; a substrate is dipped in OTS-toluene solution to prepare an OTS-SAMs; after being dried, the OTS-SAMs film is irradiated under ultraviolet light to obtain a substrate which is provided with a functionalized OTS-SAMs film on the surface; the surface of the substrate with the functionalized OTS-SAMs film is downwards suspended on the surface of the precursor liquid at the temperature of 70-80 DEG C, so that the functionalized OTS-SAMs film is contacted with the precursor liquid; an amorphous state ZnO film is prepared by depositing for 20 hours through the reverse absorption method; and after being dried, the amorphous state film is insulated at the temperature of 300 DEG C and is annealed to obtain the crystallized and patterned ZnO film. The method has simple technique and lower experimental condition requirements; and the obtained ZnO film is uniform and compact. The method is applied in the preparation of the patterned ZnO film, and has wide application prospects in the microelectronic field.

The invention relates to the field of train collision experiments, discloses a construction method and system for a train scaling equivalent model applied to a collision experiment and aims to solve the existing technical problem that scaling model construction is complicated. According to the method, following the principle that a scaling model and an actual train impact acceleration are consistent, integral conversion is performed on a kinetic equation under the condition of not considering damping to obtain scaling factors of train mass and impact force and scaling factors of train speed and time; scaling criteria are formulated according to the scaling factors of the train mass and the impact force and the scaling factors of the speed and the time; and according to the scaling criteria, parameters of the scaling model are determined to construct the scaling model.

The invention discloses a method for obtaining the monocrystalline silicon holocrystalline face etching rate under the action of surface active agents. The method comprises the steps that 1, the experiment etching rate of each constraint crystal face is obtained; 2, the value range of target parameters and an optimization population for generating the target parameters are determined; 3, a Monte Carlo S-AEP silicon atom removal probability function under the action of the surface active agents is built, and the etching probability of target atoms is calculated; 4, the stimulation etching rate of the constraint crystal face of each individual in the population is calculated; 5, a certain constraint crystal face is selected as a base crystal face, and the emulation etching rate of the constraint crystal face of each individual in the population is calculated; 6, the optimal individual in the population is screened out through an individual fitness evaluation method; 7, whether the emulation etching rate of the constraint crystal face of the optimal individual meets the output condition or not is judged, if yes, the optimal individual is output and a monocrystalline silicon full etching rate curve is generated, and if not, the optimal individual is encoded and subjected to heritable variation, a next generation of population is generated, and a new round of cycle is started.

The invention discloses fluorocarbon / palladium / magnesium-niobium pentoxide gas dimming film and a preparation method thereof. The fluorocarbon / palladium / magnesium-niobium pentoxide gas dimming film comprises a magnesium-niobium pentoxide composite film layer, a palladium catalytic layer and a fluorocarbon hydrophobic layer which are arranged sequentially on a substrate. The preparation method includes: growing the magnesium-niobium pentoxide composite film layer on the substrate, growing the palladium catalytic layer in situ on the magnesium-niobium pentoxide composite film layer, and depositing the fluorocarbon hydrophobic layer outside the fluorocarbon hydrophobic layer. Catalytic effect of palladium helps promote reversible conversion of hydrogen gas and hydrogen atoms in the hydrogen absorbing and hydrogen removal stages; niobium pentoxide is added to accelerate diffusion of hydrogen atoms in a magnesium substrate, magnesium hydroxide forms and decomposes faster, and the film can be repeatedly converted between a reflecting state and a transaprent state. The fluorocarbon film can effectively resist corrosion of inner film due to the external environment. The whole reaction process can be implemented at room temperature. The fluorocarbon / palladium / magnesium-niobium pentoxide gas dimming film has good weatherability, short response time, short recovery time and good process simplicity, and has important application prospect in the field of intelligent glass.

The invention discloses a modification method and application of activated carbon. The modification method of the activated carbon comprises the following steps of S1, subjecting the activated carbon to drying treatment; S2, introducing a gas into an atmospheric-pressure low-temperature plasma device according to a gas flow rate of 1cc / min to 200cc / min, sending the activated carbon subjected to the drying treatment into the plasma device, making the activated carbon located at an ejection outlet of the low-temperature plasma device, controlling the movement speed of the ejection outlet of the plasma device to be 0mm / s to 30mm / s, and carrying out treatment for 0.5min to 30min, so as to subsequently obtain modified activated carbon. According to the modification method, the modification of the activated carbon through spark discharge is realized through a physical way; the specific surface area of the activated carbon is obviously increased; further, surface functional groups are also more abundant. The modification process is simple and convenient; the efficiency is high; further, no pollutants are generated.

The invention discloses a preparation method of a high catalytic activity magnetic particle loading 2.5-dimensional anode. The preparation method comprises the following steps of preparing a titaniumoxide layer on ferroferric oxide magnetic particles by utilizing a dipping-heat oxidation method firstly, and then further coating the particles, covered with titanium oxide, with a antimony-doped tindioxide layer through the dipping-heat oxidation method to enable the antimony-doped tin dioxide layer to be tightly combined with the titanium oxide layer which is adhered to a magnetic particle substrate to form a solid solution; and attracting the magnetic particles by adopting the magnetic force to enable the magnetic particles to be adhered to the surface of a cylindrical electrode to form the 2.5-dimensional magnetic particle loading anode. According to the preparation method, due to the flexibility of the magnetic force, the magnetic particles on a novel electrode can be recovered in situ, so that operation is simple; and the experiment condition requirements are relatively low, the technological process is liable to control, and the prepared composite anode has high electro-catalytic activity, is high in oxygen evolution potential and long in service life and is suitable for being applied to industrially electrolyzing waste water in a large scale.

The invention belongs to the technical field of polarized optical detection, and relates to a new method for judging azimuth of a fast and slow axis of a ferroelectric liquid crystal wave plate (FeLC). According to basic principles of a rotating wave plate method and a phase modulation method, the FeLC to be measured is arranged in an elliptic bias field, a function relation between emergent light intensity and reference azimuth of the fast and slow axis of the FeLC is acquired from a polarized optical transmission theory, and reference azimuth of the fast and slow axis is judged via measurement of equality of intensity of two emergent light after FeLC modulation. The measurement method does not depend on FeLC phase delay or a modulation angle or phase delay of other wave plates in the elliptic bias field so that the measurement method is simple, easy to carry out, high in accuracy and can be widely applied to judgment of the fast and slow axis of the ferroelectric liquid crystal wave plate of arbitrary phase delay.

The invention discloses a recombinase polymerase isothermal amplification and test strip combined method for detection of Staphylococcus aureus. The method includes the steps of: designing a specificStaphylococcus aureus primer pair, taking the Staphylococcus aureus genomic DNA as the template, conducting recombinase polymerase isothermal amplification, and applying a colloidal gold test strip toacquire the detection result. The method is rapid and simple, has no need for expensive instruments and equipment, can generate a detectable level product only through 10min amplification under a 40DEG C constant temperature condition, and does not need a tedious electrophoresis process, a result can be acquired within 5min of colloidal gold test strip detection, and the result can be observed bynaked eyes. In addition, the method has strong specificity, is free of reaction with other bacterial genuses, has high sensitivity, and makes up for the disadvantages of the existing traditional detection technology. The method is expected to be applied to grass-roots inspection and quarantine institutions and become a conventional detection means, and is of important significance for improving food hygiene level, ensuring food safety and promoting the international food trade development.

The invention provides a preparation method of an Ag-Ag2O hetero-structure silver material, which aims at solving the problems of high cost and complex operation existing in the conventional hetero-structure silver material preparation method. The preparation method comprises the following steps of: one. preparing a mixed solution; two. preparing a silver nitrate solution; three. preparing silver nanoparticles; four. preparing a nanoparticle dispersion liquid; five. preparing a silver nanoparticle substrate; and six. oxidizing, thus obtaining the Ag-Ag2O hetero-structure silver material. The Ag-Ag2O hetero-structure silver material prepared by the method has good ball-like morphology and can be applied to the field of catalysis, photoelectricity and the like. The Ag-Ag2O hetero-structure silver material prepared by the method has the diameter of about 20mm and good dispersity and is uniform in distribution. The preparation method disclosed by the invention has the advantages of being mild and simple, easy to operate and environment-friendly and the like and having low requirements on experimental conditions. The method can be used for preparing the Ag-Ag2O hetero-structure silver material.

The invention provides a method for simultaneously measuring electro-optic coefficients Pockels and Kerr, belonging to the technical field of electro-optic measurement. In the method, surface plasmon wave is excitated by adopting prism coupling so that the energy of the incident light is coupled into the surface plasmon wave mode and the guided wave mode and the energy of the reflected light attenuates rapidly to form a series of resonance curves, namely attenuated total reflection (ATR) curves; and a triangular wave voltage is applied to modulate the incident light, the ATR curves slightly move horizontally, the intensity of the reflected light varies, and the coefficients Pockels and Kerr are solved through the variable quantity.

The invention relates to a method for establishing a pancreatic cancer model, and belongs to the technical field of the establishment of an animal model. According to the method, a slow virus for over-expressing one cancer gene and simultaneous knocking down two cancer suppressor genes is constructed according to cancer genes and cancer suppressor genes having the maximum mutation rate in human pancreatic cancer in TCGA database, and the slow virus is applied to the pancreas head of a tree shrew through orthotopic injection so as to induce pancreatic cancer of the tree shrew; and specifically, the method comprises the following steps: (1) construction of a slow virus vector; (2) virus packaging, titre determination and in vitro verification; (3) virus injection; and (4) monitoring and pathological investigation of the tree shrew. The method disclosed by the invention has the advantages that the method is short in inducing cycle, high and stable in morbidity, and simple and convenient in operation, and is capable of rapidly and effectively establishing a tree shrew pancreatic cancer model for simulating the genetic mechanism of human pancreatic cancer to the greatest extent; and the pancreatic cancer model is applicable to the research of the pathogenesis of human pancreatic cancer, the exploration of cancer therapy targets and the development of novel antineoplastic drugs, so as to offer a reference for the treatment of human pancreatic cancer.