213results about How to "Reduce the number of experiments" patented technology

The invention provides a screening method for a tumor new antigen, and the method comprises: A, obtaining polypeptide sequences encoded corresponding to mutant genes of a tumor tissue cell; B, performing predicting on the affinity of each polypeptide sequence with a major histocompatibility complex MHCI, and screening a polypeptide sequence having the affinity exceeding a specified threshold; andC, predicting polypeptide enzyme digestion sites of the polypeptide sequences encoded corresponding to the mutant genes, and retaining the polypeptide sequences in which the enzyme digestion sites arenot in the polypeptide sequence having the affinity exceeding the specified threshold and which can be separated into segments and cannot be enzyme-digested, as candidate polypeptide sequences of thetumor new antigen. The screening method for the tumor new antigen facilitates subsequent further targeted experiments based on the screening for the tumor new antigen, can greatly reduce the number of the experiments, and saves time, labors and expenditures.

The invention discloses a performance calculating method of a finned tube evaporator under the frosting working condition. The method comprises the following steps of: determining the operation working condition of the evaporator; setting the defrosting cycle t of the evaporator, the calculating time interval delta t and the initial frost layer thickness; dividing the evaporator calculating areas according to the user setting; calculating the initialization; solving a control equation of single calculating area i; judging whether frost is formed and calculating the surface temperature of the frost layer; updating the calculating parameter of the calculating area; updating the frost layer thickness and density of the calculating areas; and judging whether the calculation is ended or not. The calculating areas of the evaporator are divided based on a certain pipe length, the control equation in each calculating area is solved, and a high-speed calculating function of a computer is used, so that the performance predicating efficiency and accuracy are high under the preset working condition. By using the high-efficiency calculating speed of the computer, the frequency of experiments of the evaporator is greatly reduced, and the development cycle of the products is shortened.

The invention relates to a print field mark false-proof method, based on digit watermark technique, wherein the mark image is embedded with watermark false-proof information, which comprises: 1, using self-adaptable watermark strength to embed two-dimension random copy watermark into the idle field of original mark image, to generate false-proof mark image; 2, using false-proof mark image and one-dimension Ladon transformation to generate self-registration template, to be used to calculate self-registration geometrical deformation parameter at the mark false check step; 3, generating two-dimension random copy watermark which is same as in step 1; the image collector collects tested mark image, extracting self-registration parameter; based on self-registration parameter, synchronizing the two-dimension random copy watermark; based on synchronized watermark and tested mark image, using self-related judgment, to realize the recognition of real and false mark.

This invention relates to one memory radiation test method and its device, wherein, the device comprises radiation source, level conversion circuit, main control unit, and data input unit and system set and process unit. This invention method comprises the following steps: writing designed data on one memory device; then starting radiation source for memory intensity, set distance, set time; in testing process reading and writing data to the memory part according to read mode; real time comparing the memory part real time output value and predication value to judge whether its is right; once there is wrong data rightly recording its invalid information to find out threshold point of invalid of memory.

The present invention discloses a method for analyzing a crushing property of a composite material coated twelve-rectangular-cross-section thin-walled beam and aims to solve the problem that crushing property analysis of the thin-walled beam cannot be performed by using a finite element method or an experimental method due to a shortage of a geometrical model with a detailed structure in a conceptual design stage of crashworthiness of a car body. The method comprises the steps: 1, deducing an average crushing counter force analytic expression of a non composite material coated hollow twelve-rectangular thin-walled beam; 2, simplifying a stress-strain curve of a fiber reinforced composite material, i.e. in the stretching process, a stress-strain relationship is shown as linearity until the fiber reinforced composite material is broken, and in the compressing process, the stress is kept at a certain level without a change after yielding; 3, calculating a plastic limit bending moment and a limit yielding membrane stress of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam; 4, correcting an effective crushing distance and a final folding angle of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam; and 5, deducing the average crushing counter force analytic expression of the fiber reinforced composite material coated twelve-rectangular-cross-section thin-walled beam.

The invention discloses a concurrent program runtime parameter optimizing method, which comprises the steps that preparative experiment is performed by a one-order one-factor experiment method; the influence of single parameter change on the program performance is obtained, so that the parameters with the program performance influence exceeding the preset target, and the parameter values are screened out; the current optimal parameter combination is coarsely screened out from the parameter screened out from the preparative experiment by a uniform experiment method; a quantitative parameter value is then taken near each parameter value in the coarsely screened optimal parameter combination; the contribution degree on the experimental index of each parameter and the parameter values is analyzed by an orthogonal experiment method; further, the final optimal parameter combination is determined. The method has the advantages that the optimal parameter combination of the concurrent program on a concrete platform can be obtained; the parameter combination can be recommended to budget exceeding users, so that the operation of the budget exceeding users runs at the parameter combination; the execution efficiency of the application program is optimized, so that the whole throughput rate of the budget exceeding system platform is improved.

The invention discloses a surrounding rock creep rupture warning method applied in a soft rock cavern warning system. The method is characterized by comprising following steps: (1) reading the stress [sigma] and the strain [epsilon] of surrounding rock in a soft rock cavern (represented as the drawing 1) through a sensor; (2) reading the pre-stored data of a triaxial compression test and a triaxial creep test of a rock sample of the soft rock cavern in which the soft rock cavern warning system is arranged for obtaining physical and mechanical parameters of the soft rock, including: bonding force c, internal friction angle [phi], and Poisson ratio [mu] and stress-strain curve data of a whole triaxial creep process under any stress state being higher than long-period strength; and (3) combining the test curve, obtained through the test, of the whole triaxial creep process under the stress state with the physical and mechanical parameters obtained in the step (2).

The invention relates to a calculation method for ballistic limit velocity of a thin steel plate under vertical penetration of a flat-nose hollow projectile at low velocity. According to specific conditions of a warhead and a protection structure, geometric sizes and material parameters of a flat-nose hollow projectile body and a target plate are determined; a deformation displacement field of thetarget plate near the ballistic limit velocity is determined; deformation energies of the projectile body and the target plate are calculated based on deformation and destruction characteristics of the projectile body and the target plate wherein the deformation energies of the projectile body and target plate comprise plastic deformation energy and sheer plug energy of the projectile body and plastic deformation energy of the target plate, the plastic deformation energy of the projectile body comprises the energies consumed in upsetting deformation and inner concave deformation of the hollowpart; the ballistic limit velocity of a thin steel plate under vertical penetration of the flat-nose projectile at low velocity is determined based on the energy conservation principle. The ballisticlimit velocity of the target plate is effectively predicted by the method so as to determine that whether or not the target plate can be penetrated by the flat-nose hollow projectile body or the projectile body can be blocked by the target plate, and the method can also provide an effective reference for a ballistic impact test or a numerical simulation method so as to reduce the number of testsor simulation calculation time.

The invention relates to a calculation method for ballistic limit velocity of a thin steel plate under vertical penetration of a flat-nose projectile at low velocity. According to specific conditionsof a warhead and a protection structure, geometric sizes and material parameters of a projectile body and a target plate are determined; a deformation displacement field of the target plate near the ballistic limit velocity is determined; deformation energies of the projectile body and the target plate are calculated based on deformation and destruction characteristics of the projectile body and the target plate, wherein the deformation energies of the projectile body and target plate comprise plastic deformation energy and sheer plug energy of the projectile body and plastic deformation energy of the target plate, the plastic deformation energy of the projectile body is mainly the energy consumed in upsetting deformation of the projectile body; the ballistic limit velocity of a thin steelplate under vertical penetration of the flat-nose projectile at low velocity is determined based on the energy conservation principle. The ballistic limit velocity of the target plate is effectivelypredicted by the method so as to determine that whether or not the target plate can be penetrated by the projectile body or the projectile body can be blocked by the target plate, and the method can also provide an effective reference for a ballistic impact test or a numerical simulation method so as to reduce the number of tests or simulation calculation time.

The invention discloses a method for evaluating the flowability of a polymer material by adopting a molecular simulation method. The method comprises the following steps: constructing a single chain structure of the polymer to be tested according to a repeating unit of the polymer to be tested; establishing a bulk structure model of the polymer according to the structure parameters and ingredientsof the polymer; carrying out the first relaxation of the bulk structure model, the first selection of the global optimum configuration of the NVT ensemble, the second relaxation of the configuration,the second selection of the global optimum configuration of the NPT ensemble, and the cooling annealing simulation of the NVT and NPT ensembles in order to make the configuration and density of the model fully balanced, and obtaining the second structure data; carrying out sufficient dynamic equilibrium on the second structural data to obtain the dynamic trajectory data; testing the validity of the viscosity data was tested by the stress autocorrelation function analysis of the kinetic trajectory data, and obtaining the reliable shear viscosity data of the polymer . The method of the invention can quickly, efficiently and accurately calculate the shear viscosity data of the polymer material.

The invention provides a numerical simulation method for a silicon carbide ceramic ordinary pressure solid phase sintering process. The method comprises the following steps of (1) building a thermal viscoelasticity constitutive model of the silicon carbide ceramic ordinary pressure solid phase sintering process; (2) building a finite element analysis model; (3) defining a sintering creep constitutive equation; (4) performing transient thermal structural coupling nonlinear simulation analysis to obtain temperature field distribution and a densified contraction amount on a silicon carbide ceramic product; and (5) through comparison with test data measured by a real-time observation furnace, verifying the correctness of the thermal viscoelasticity constitutive model and the finite element analysis model. According to the method, the technical problems that deformation and temperature distribution states on the ceramic product cannot be measured in real time in an existing silicon carbide ceramic ordinary pressure solid phase sintering process and targeted sintering process parameters and process measures cannot be accurately set and formulated for silicon carbide ceramic products in different size and structure forms are solved.

The invention relates to in-parallel reaction kettles and a reaction-kettle-based device for testing the induction time of hydrates, and belongs to the technical field of hydrates. The in-parallel reaction kettles are arranged annularly and comprise eight equidistant high pressure-resistant stainless steel reaction kettles, wherein an upper flange plug and a lower flange plug are arranged on each reaction kettle; an interface is formed in the center of an upper flange and is used for connecting a temperature sensing system (a thermoelectric couple); a lower flange is provided with an interface for the injection of air and liquid and vacuumizing; and different hydrates can be added into the reaction kettles to generate induction factor impact factors. The testing device consists of the in-parallel reaction kettles, a temperature control system, an air supply pressurization system, a liquid supply system, a computer data acquisition system, a vacuum pump and a safety valve. By the in-parallel reaction kettles and the reaction kettle-based device, influencing factors of induction time in the process of generating the hydrates can be measured, the condition of the influence of each induction factor on the generation of the hydrates can be found, and the problem of long test period due to slow generation of the hydrates is solved. Simultaneously, the influence degree of different influencing factors on the induction time in the process of generating the hydrates can be tested accurately and efficiently by combining a cross-over experiment.

The invention provides an optimization method for metal 3D printing technology parameters. The method comprises the steps of determining a quality characteristic Y value of this experiment; selectingcontrollable factors and all factor levels; designing an experiment orthogonal table and collecting experiment data based on a Taguchi method; analyzing the experiment data; selecting and estimating an optimal condition; determining the experiment reliability of the present stage; carrying out an experiment summary of the present stage and carrying out analysis. According to the optimization method for the metal 3D printing technology parameters, based on the Taguchi method, the experiment frequency is reduced, and the cost of optimizing the technology parameters is lowered. The rule of the influence of the controllable technology parameters such as powder spreading layer thickness, laser power, scanning speed and scanning line spacing distance on the specific density of a metal 3D printing part is disclosed.

The invention provides a vortex-induced vibration simulation method for an elastic support rigid cylinder structure under the action of a nonlinear energy trap in the field of computational fluid mechanics numerical simulation. The vortex-induced vibration simulation method comprises the following steps: firstly, establishing a two-dimensional drainage basin and a geometric model of the two-degree-of-freedom elastic support rigid cylinder structure; secondly, respectively carrying out grid division on the two-dimensional drainage basin and the structural domain, and carrying out interpolationon the two sets of grids by utilizing a nested grid technology to form a flow field calculation grid; establishing a computational structural mechanics model under the action of the NES, combining thecomputational structural mechanics model with the computational fluid mechanics model, and performing cylinder fluid-solid coupling numerical calculation; and finally, carrying out post-treatment toobtain the vortex-induced vibration characteristic of the cylinder structure under the action of the NES and the inhibition effect of the NES on the vortex-induced vibration of the cylinder structure.According to the method, the vortex-induced vibration high-fidelity simulation model of the two-dimensional cylinder structure under the action of the NES is established on the basis of a computational fluid mechanics method, a structural dynamics theory and a nested grid technology, a numerical prediction result has high credibility, and reference is provided for researching cylinder vibration reduction.

The invention relates to a numerical simulation method for designing parameters of an axis symmetric jet pressure-stabilizing cavity. The method includes: building an integrated geometric model of a bearing and the pressure-stabilizing cavity and a two-dimensional flow area, performing grid division on the two-dimensional flow area, and building a corresponding computational fluid mechanics modelfor fixed constant numerical simulation; determining a valuing range of length L according to sensitivity of axis speed distribution of the pressure-stabilizing cavity to inner diameter parameters D,determining the length L according to uniformity index of speed distribution on an outlet section, and determining inner diameter D according to whether cross section speed distribution is smooth or not. The method improves actual applicability of numerical simulation in the process of designing the parameters of the axis symmetric jet pressure-stabilizing cavity.

The invention relates to a numerical simulation method of parameter design of an inner-annular-direction jet flow pressure stabilization chamber, and belongs to the technical field of high-pressure gas lubrication. The pressure stabilization chamber is used in pairing with a high-pressure disk gas bearing. According to the method, an integrated geometric model of the bearing and the pressure stabilization chamber and a two-dimensional calculation domain are established; a two-dimensional calculation domain mesh is divided; a corresponding calculation fluid dynamics model is established; numerical simulation of steady and unsteady flow fields is carried out, and flow stability graphs of inner-annular-direction impinging jet flow are firstly drawn; then an inner diameter D of the pressure stabilization chamber, annular-groove width h, and value ranges of an annular-groove position H and a chamber top distance I are determined according to the flow stability graphs; and finally, correspondence relationships of flow field structures and parameters of the pressure stabilization chamber are obtained through processing on steady-numerical-simulation results. According to the method of theinvention, flow field design costs are reduced, experiment research is simplified, time and fees are saved, and practical application of numerical simulation in a parameter design process of the pressure stabilization chamber is improved.

The invention discloses a TSV (Through Silicon Via) array temperature optimization method based on an orthogonal test, which mainly overcomes the defects of low efficiency and low precision of the existing three-dimensional integrated circuit temperature optimization technology, and comprises the following implementation steps of: setting a factor influencing the temperature of a TSV array; Selecting at least three factors as key factors; Selecting parameters for each key factor; Generating an orthogonal test table according to the selected factors and parameters; Establishing a through-silicon-via geometric model by utilizing finite element simulation software, arranging a test according to an orthogonal test table, and adding a result into the orthogonal test table; And determining the primary and secondary sequence of the temperature influenced by each factor, and designing an optimal scheme for reducing the temperature of the through-silicon-via array. Based on orthogonal tests andfinite element simulation, a test result with the precision higher than that of a traversal test can be obtained within the limited number of tests, the calculation time is greatly saved, large-scaledata processing is avoided, the temperature optimization efficiency and precision of the TSV array are improved, and the method can be used for designing a three-dimensional integrated circuit.

The invention relates to a performance evaluation experiment analysis method for a photo-electric imaging system, which includes the following steps: building a photo-electric imaging system performance prediction model; dividing input factor sets and output index sets in the photo-electric imaging system performance prediction model; conducting screening experiment on the input factor sets; dividing input factor levels of the model according to screening experiment results and building a model input factor level graph; selecting orthogonal graphs according to the model input factor level graph to form experiment schemes; invoking the performance prediction model to calculate the output index sets corresponding to each experiment scheme; and performing range analysis and sensitivity analysis by aid of the output index sets and finishing the experiment analysis process. The performance evaluation experiment analysis method for the photo-electric imaging system can compteltely, typically and equilibrium comparably reflect effects of all experiment input factors on experiment indexes with the fewest experiment times, analyzes and determines the optimum level of all the experiment input factors and primary and secondary relations of all the experiment input factors in effects on the output indexes through a range method, and simultaneously analyzes the sensitivity degree of the input factors on the output indexes through a sensitivity analysis method.

The invention belongs to the field of finite element simulation of fiber reinforced composite materials, and relates to a refined modeling simulation method of a two-dimensional plain woven fiber reinforced composite material. The method comprises the following steps: (1) simplifying the microstructure of the two-dimensional plain woven composite material; (2) acquiring RVE geometric parameters; (3) establishing a geometric model; (4) setting section attributes; (5) determining performance parameters of the fiber tows; (6) setting a material model; (7) defining a load condition and a boundarycondition; (8) contact setting; (9) setting a control card and submitting calculation; according to the invention, the mechanical response and failure process of the fiber and the matrix of the fiberreinforced composite material can be simulated in more detail to obtain the microcosmic processes of interface cracking, fiber matrix damage and the like of the fiber reinforced composite material; accurate reference bases are provided for related structural design, the actual experiment frequency of researchers is reduced, the development period is shortened, and meanwhile the design and development cost is reduced.

The invention discloses an optimizing method of a selenium-enriched yeast culture process. A novel sodium selenite adding mode is adopted, production of mycelium is unaffected, the utilization rate ofselenium is greatly increased, inorganic selenium is converted to organic selenium as much as possible, toxicity of the product is reduced, and high industrialized application is achieved; accordingto above results, shaking culture temperature is adjusted to be 23DEG C, initial to pH 6.0 and rotational speed to 120rpm; when a culture medium comprises, by weight, 1.0g / L of magnesium sulfate, 2.0g / L of sodium chloride, 0.5g / L of monopotassium phosphate and 2g / L of sodium selenite, sodium selenite is evenly divided into three equal parts which are added into the culture medium respectively in the first, second and third days of fermentation, about 11.4g dry weight of mycelium and about 331.7mug / g of enriched selenium can be obtained after 7 days of fermentation, and the conversion rate of organic selenium is up to 90.0%. Compared with the prior art, the selenium-enriched yeast culture process and the optimizing method have the advantages that cost is greatly saved and are suitable for modern industrial development.

The invention provides a method for evaluating vacuum plume effect on basis of mutual coupling of experiment and simulation and aims to quickly and accurately evaluating the vacuum plume effect in rocket engines. The method includes: performing simulation aided experimental design, to be specific, performing initial simulation to determine typical experimental conditions and key measurement parameters; confirming experimental effectiveness, to be specific, comparing experimental data of an experimental process with initial simulation results, and judging the effectiveness; confirming method effectiveness, to be specific, after confirming experimental effectiveness, subjecting a simulation method to verification and correction to allow sufficient precision; computing popularization of the simulation method, to be specific, subjecting all conditions of a plume effect task to be analyzed to simulation computation by the simulation method verified. The method has the advantages that various specific analytical problems about the engine vacuum plume effect can be studied and evaluated quickly, efficiently and accurately, reasonableness of experimental design can be effectively guaranteed, fewer experiment times are required, and experiment cost is lowered.

The invention provides a method for correcting an overburden pressure physical property of a shale reservoir. The method belongs to the field of petroleum and natural gas exploration. The method is based on a reservoir rock core overburden pressure test. Through analyzing a relationship and a role between a physical property change after an overburden pressure is applied on the rock core and an overburden pressure change, a reservoir physical property overburden pressure correction model is established, namely a reservoir porosity overburden pressure correction model and a reservoir permeability overburden pressure correction moduel. The method comprises the following steps of (1) performing a rock core overburden pressure testing, and obtaining a testing result; (2) establishing a rock core physical property overburden pressure correction model, namely analyzing a change relationship between a rock core overburden pressure physical property and the overburden pressure according to the testing result of the step (1), and establishing a relationship model between the overburden pressure physical property and the overburden pressure in each rock core sample; and (3) establishing a reservoir physical property overburden pressure correction module, namely analyzing differences among the rock core physical property overburden pressure correction models which are established in the step (2), and analyzing a change rule between the difference and a routine physical property on the ground of the rock core.

The invention provides an analysis method for collapsing force of two common steel rectangular-section thin-wall beams under a symmetric mode. The method comprises the steps that first, an average collapsing counter-force expression of rectangular-section thin-wall beams made of steel plates with the same material and the same thickness under a symmetric deformation mode is derived; second, average collapsing counter-force expressions of rectangular-section thin-wall beams made of two steel plates with different materials and different thicknesses, rectangular-section thin-wall beams made of two steel plates with different materials and the same thickness and rectangular-section thin-wall beams made of two steel plates with the same material and different thicknesses under two mixed formsare derived respectively; and engineering approximation is performed on the average collapsing force expressions solved in the second step under the three conditions. Through the method, under the condition that only dimension parameters and material characteristics are available, the collapsing performance of the two common steel mixed rectangular-section thin-wall beams is accurately predicted and analyzed, forward design of the thin-wall beam structure can be realized, simulation trial errors and experiment times are greatly reduced, the development cycle is shortened, and design cost is lowered.

The invention discloses a real-time electric appliance identification method and system based on a sliding window. The method comprises steps that ammeter power data of a sample electric appliance combination is acquired, sample rising edge vectors are extracted to acquire a sample set, and electric appliance types of the sample rising edge vectors are calibrated; length We of an edge sliding window is acquired through calculation, and constraint is carried out through utilizing the length of the edge sliding window to acquire length Wt of the sliding window and a sliding distance L of the edge sliding window; according to the length of the edge sliding window and the length of the sliding window, a rising edge vector is extracted from acquired real-time power data, an origin of the rising edge vector is taken as an origin of the edge sliding window, sliding for (L-1) times is carried out, the rising edge vector is further utilized to acquire L sliding rising edge vectors, and an electric appliance type of the corresponding sample rising edge vector having the smallest distance to the sliding rising edge vector is taken as an electric appliance type of the corresponding sliding rising edge vector. The method is advantaged in that real-time electric appliance identification accuracy is high, and identification efficiency is high.

The invention discloses a heavy gas leakage diffusion and control study experiment method. The method comprises the steps of executing control technologies via orthogonal experiments to obtain key factors influencing properties and influence degrees; performing fine control experiments according to the obtained key factors to confirm a quantitative relation between the key factors and the influence degrees; performing heavy gas leakage diffusion and control experiments via orthogonal experiments to determine key factors influencing the concentration and distribution of heavy gas cloud under different conditions and influence degrees, tracing the direction of mass energy, disclosing a control mechanism, and seeking an acting relation among the control technologies; and establishing a mathematical model according to the obtained acting relation among the control technologies, key factors and influence degrees, and predicting evaporation rates and down-wind LFL (Lower Flame Limit) longest distance under different environmental conditions, leakage conditions and corresponding control technologies. The method has a very good effect on controlling LNG (Liquefied Natural Gas) leakage harm by studying various control technologies.

The invention relates to a method for predicting radiation attenuation of electrons and protons of a spatial solar cell and belongs to the technical field of satellite solar cells. A displacement injury method used for predicting comprises the following steps of: (1) determining a relationship between displacement injury and radiation attenuation performance of the electrons and the protons of the solar cell, and testing energy levels of the electrons and the protons; (2) computing the displacement injury of the cell by using non-ionization energy loss to obtain a relationship between the displacement injury and electrical performance attenuation of the cell; (3) computing total displacement injury of the electrons by using a calculus electronic energy spectrum and computing displacement injury of the protons by using a calculus protonic energy spectrum; (4) determining an attenuation ratio of an electrical performance parameter, and multiplying the initial value of the electrical performance parameter by the attenuation ratio to obtain a predicted value of the electrical performance after radiation; and (5) substituting the electrical performance parameter into the a formula to work out relevant data, and then working out the parameter of the cell after the radiation at any working point according to the formula. The method has the advantages that the method is easy to operate, high-efficiency, quick and low in cost, data is accurate, and the like.

The invention relates to a calculation method for evaluating the heat insulation performance of a complex multi-layer thermal protection structure, and the method comprises the steps: determining the initial parameters of the multi-layer thermal protection structure, including the number of layers, the thickness of each layer, the thermophysical parameters of each layer, such as the density, the heat conductivity coefficient, the specific heat capacity, the equation of a heat absorption heat source, and the change relational expression of the air gap thickness and the thermophysical parameters; establishing a differential equation set of the multi-layer thermal protection structure, giving a thermal boundary condition and an interlayer continuity condition, dividing units based on a finite element method, discretizing the differential equation set, calculating a thermal capacity matrix, a thermal conductivity coefficient matrix and a thermal load matrix, and establishing a matrix equation set; and solving the matrix equation set by adopting a Gaussian-Seidel method to obtain node temperature and outer wall surface temperature distribution of the multi-layer thermal protection structure. The heat transfer calculation model of the multi-layer thermal protection structure can be established, and the method is suitable for evaluating the thermal insulation performance of the multi-layer thermal protection structure in different complex thermal environments.

The method of determining cold rolling expansion feeding speed includes the following steps: 1. measuring the outer diameter and inner diameter of the ring blank, the radius of the main rolling wheel and the radius of the core roller; giving the main shaft rotation speed based on the cold rolling apparatus and calculating the circumferential speed of the main rolling wheel; finding out friction coefficient of cold rolling expansion based on the given ring product wall thickness; 2. calculating the minimum value Dmin and maximum value Dmax of diameter increase based on the given formulas; 3. substituting the minimum value Dmin and maximum value Dmax to one given expression; and 4. plotting two curves with the values of the step 3 and obtaining the cold rolling expansion feeding speed based on the range between these two curves. The present invention is accurate and simple.

The invention relates to a method for determining a rib laying manner of a reinforced retaining wall based on a sand box model test. Initial rib laying parameters of a wallplate are calculated out by establishing a sand box model of a simple interface model and through the Rankine earth pressure theory and the mechanism of action of a reinforced retaining wall, thus a wallplate with pull ribs is manufactured; an earth pressure model loading test is carried out, the number of arrangement layers of the pull ribs is gradually reduced, the rib laying parameters are calculated again, the earth pressure model loading test is repeated, and the optimized number of layers of the pull ribs, the horizontal intervals of all the layers and the vertical positions of all the layers are obtained; the length of the pull ribs is gradually reduced, and the earth pressure loading test is repeated until the optimized length of the pull ribs is obtained. According to the method for determining the rib laying manner of the reinforced retaining wall based on the sand box model test, the theory computing method and the earth pressure model test are effectively combined, the optimal pull rib arrangement manner of the reinforced retaining wall can be obtained more simply, more rapidly and more reliably. Thus, the reinforced retaining wall can stably and effectively play a role in supporting, the total number of layers of rib adding is minimal, the length of the pull ribs is the shortest, the consumption amount of rib materials is small and the structure is economic.