221 results about "Computational simulation" patented technology

A method and system are described that enhance the computational simulation, such as a fluid flowing through a porous media, under the present techniques. In particular, a computer implemented simulation method is described that includes initializing a simulator and utilizing an intelligent performance assistant to select a set of parameters and algorithms for the simulator. Then, equations are solved with the set of parameters and algorithms and the solution to the equations is then obtained.

A system and method for systematically generating potential metal-organic framework (MOFs) structures given an input library of building blocks is provided herein. One or more material properties of the potential MOFs are evaluated using computational simulations. A range of material properties (surface area, pore volume, pore size distribution, powder x-ray diffraction pattern, methane adsorption capability, and the like) can be estimated, and in doing so, illuminate unidentified structure-property relationships that may only have been recognized by taking a global view of MOF structures. In addition to identifying structure-property relationships, this systematic approach to identify the MOFs of interest is used to identify one or more MOFs that may be useful for high pressure methane storage.

A circuit is simulated by using distributed computing to obtain a real solution. The circuit may be an entire integrated circuit, portion of an integrated circuit, or a circuit block. A circuit simulation technique of the invention generates a system graph, finds a tree, and partitions the tree into two or more subtrees. The technique identifies global links and local links in the graph. Each subtree may be solved individually using distributed, parallel computing. Using the results for the subtrees, the technique obtains a real solution, branch voltages and currents, for the circuit.

The invention relates to a computational simulation method of a flow slide catastrophe of a rock and soil material, belonging to the technical fields of computational rock and soil mechanics, geologic hazard prevention and control and geologic environment protection. Aiming at the limitation that the conventional grid-based computing method is only suitable for small-deformation analysis, the invention discloses a computational simulation method of an entire flow slide catastrophe process of the rock and soil material based on smoothed particle hydrodynamics (SPH). According to the method, a Navier-strokes equation is used as a control equation, solid phase and liquid phase of the rock and soil material are described by using a sub-load face Cambridge model and an incompressible fluid constitutive model respectively, porous medium theory and darcy law are introduced to calculate solid-liquid coupling acting force, and a computation model, which considers the full coupling of water and soil, of the flow slide catastrophe of the rock and soil material, is established. According to the computational simulation method, the entire process of large-deformation flow damage of the rock and soil material can be effectively represented, and the fluidization characteristic of the rock and soil material is captured, so that powerful scientific basis is provided for engineering design, engineering construction, disaster prevention and reduction and the like of high-risk areas of the flow slide disaster, and meanwhile, application of the computational rock and soil mechanics in the technical fields of actual engineering construction, geologic hazard prevention and control and the like is forcefully promoted.

The invention discloses an internal force detecting method for a hanger rod with a shock absorber, sequentially comprising the following steps of: 1, collecting basic parameters of a hanger rod structure; 2, computing the geometric stiffness EI of the cross section of the hanger rod; 3, testing the vibration frequency of the hanger rod structure; 4, building finite element computational simulation under the analysis of the vibration frequency of the hanger rod structure; and 5, solving a vibration frequency equation, so that the internal force of the hanger rod can be obtained. The method can completely consider the vibration parameters of the cable rods including the stiffness, the nonhomogeneity, the complex boundary conditions and the like of the cable rods, and can identify the internal force of the cable rod, which can not be identified by the conventional method under the complex conditions.

The invention discloses a short-wave radio set electromagnetic pulse test circuit based on a finite-difference time-domain analytical method, which comprises an algorithm control unit, an electromagnetic pulse generator and a radio set load and test unit, wherein the electromagnetic pulse generator generates electromagnetic pulse interference entering the test unit after radio set loading; the test unit is used for measuring the influence on the radio set load by the electromagnetic pulse interference and sending the measured result to the algorithm control unit for computational simulation; the algorithm control unit is used for carrying out computational simulation according to data provided by the test unit, and the result provides reference for the electromagnetic pulse protection of a radio set. The invention utilizes the finite-difference time-domain method to carry out analyzing simulation on antennae, cables and screening body models of the short-wave radio set to obtain the coupling law under the condition of specific electromagnetic pulse parameters and design the protection circuit or protection mode of the antennae, cables and screening body hole seams of the short-wave radio set. The invention is especially suitable for electromagnetic pulse protection of high-sensitivity and high-gain radio sets and other sensitive equipment.

The invention relates to a design method of an annular vortex array mask plate with controllable vortex number. By means of computer generated hologram principle, light beam complex amplitude computational simulation is carried out to superimpose two perfect vortex beam mask plates with different radii, so that an annular vortex array can be generated in a far field. Cone angles of two axicon lens are adjusted to control the light ring superposition degree of concentric perfect vortexes, thus achieving generation of an annular vortex array. The annular vortex array can achieve arbitrary control of the dark nuclear number of the ring, thus having very important application prospects in particle manipulation technology.

The invention discloses a traffic simulation model calibration method considering traffic conflict index distribution problems. According to the method, an efficiency index and a safety index are considered at the same time, an appropriate intersection efficiency index is selected to serve as a constraint condition of a first-round calculation target and a second-round calculation target of traffic simulation modeling, and an appropriate intersection safety index is selected to serve as the second-round calculation target of traffic simulation modeling; by calculating a standard difference ofsimulation indexes and selecting an appropriate confidence interval to estimate the minimum number of times of simulation needed for an established simulation model, the number of simulation tests ofparameter correction is effectively reduced; an ANOVA test or a correlation test are used to screen out simulation parameters with remarkable influences on the efficiency index and the safety index; amulti-constraint calibration optimization problem is established, and a specific strategy and a process for calibrating model parameters by use of a genetic algorithm are proposed; a fitness parameter selection scheme is proposed; a model constraint condition selection scheme is proposed; and model calculation is performed through traffic conflict parameter distribution.

The invention discloses a control method of metal material laser 3D printing in-situ preheating temperature, and belongs to the field of laser rapid forming technologies and preheating temperature control of the laser rapid forming technologies. According to the method, with the assistance of computational simulation, by controlling the boundary condition, the laser power, the laser scanning speed, the laser spot size and the laser emission intermittent time in the metal material 3D printing process, in-situ preheating in the laser forming process of metal materials is achieved. Heating devices need to be additionally designed for traditional resistor heating and induction heating, and the requirements for the cooling capacity of laser forming devices are rigorous. By means of the in-situ preheating method, the device input can be reduced, control over the temperature of metal materials in the printing process is achieved, and the control requirement for the preheating temperature in the metal material laser 3D printing process is met.

The invention provides a microscopic image data enhancement method and device, which can automatically label images. The method comprises the following steps: generating a virtual image of a real microscopic image; migrating the style of the real microscopic image to the virtual image through a style migration method; obtaining corresponding semantic annotations from each semantic area of the virtual image according to the computational simulation characteristics of the virtual image, and combining the virtual image with a real microscopic image style with the corresponding semantic annotations to form annotated image data so as to train an image analysis model. The invention relates to the technical field of measuring microscopes.

The invention relates to a blue phosphorus/transition metal disulfide heterojunction anode material and a preparation method thereof. According to the technical scheme, the method comprises the following steps of: based on computational simulation of a first principle method of a density function theory, screening a blue phosphorus/transition metal disulfide heterojunction, and further designing a method for preparing the heterojunction; preparing transition metal disulfide by adopting a chemical vapor deposition method; and uniformly stirring and mixing the transition metal disulfide, white phosphorus powder and an organic solvent, performing centrifugal treatment, and performing annealing treatment in vacuum or argon atmosphere, thereby obtaining the blue phosphorus/transition metal disulfide heterojunction anode material. The anode material prepared by the invention has high structure stability, conductivity, flexibility, high lithium adsorption capacity and good electrical properties, and the preparation process is simple, high in repeatability, high in yield, low in cost and suitable for large-scale industrial production.

The invention discloses a BGA tin-lead solder ball solidification process simulation method based on a cellular automaton, and belongs to the field of metal solidification process simulation. In orderto solve the problem that when a cellular automaton method is used for simulating a metal solidification process at present, the situation that under the condition of non-isothermal and non-equal solute interfaces, an unbalanced interface series model needs to be used for simulating the rapid solidification process of a supercooled alloy melt is not considered, so that the simulation process doesnot meet the actual solidification process of a BGA tin-lead solder ball. The method includes: acquiring physical property parameters; uniformly dividing a fixed two-dimensional calculation area intosquare grids; initializing a unit cell; establishing a dendritic crystal growth model; capturing the liquid phase cells; calculating the solid-phase growth rate of the captured adjacent interface cells, the concentration of residual liquid-phase solute and the temperature of unit cells according to the established dendritic crystal growth model; accumulating the unit time step length obtained byeach time of calculation, and ending the calculation simulation process. The method is used for researching the growth process of the isometric crystal and the influence of different supercooling degrees on the growth of the isometric crystal.

The invention discloses a data parallel treatment based virtual reality 3D simulation method and system. The method comprises the steps of: establishing a three-dimensional model and setting initial border conditions; performing domain decomposition on the three-dimensional model; inputting the initial border conditions and element information in each sub-model into a progress; regarding the initial border condition as a calculation condition, setting borders again when the initial border conditions in the calculation process change, calculating the sub-models again until the borders are steady or the calculation sub-results are constant numbers; combining the calculation sub-results and generating an integral calculation result of the model; setting a camera angle, a traveling path and a rendering effect and generating a 3D document based on the calculation result; playing and showing through a 3D player. The data parallel treatment based virtual reality 3D simulation method and system can be widely applied to the three-dimensional design industries, such as virtual operation, construction ventilation structure design and ventilation design. Through the results of the compute simulation and virtual reality technology, transient characteristics of a virtual object is shown stereoscopically, the exhibition degree is improved, and the design effect is enhanced.

The invention discloses an observation method and an observation system of a diesel SCR (Selective Catalytic Reduction) system input state. The observation method comprises the following steps that Step 1, a state space model is established according to a chemical reaction in an SCR system; Step 2, the state space model is combined with an EKF (Extended Kalman Filter) equation, wherein the EKF equation comprises a prediction equation, namely x(k) is equal to f[x(k-1),u(k)] plus w(k), and a renewal equation, namely z(k) is equal to h[x(k)] plus v(k), x(k) represents a state vector, u(k) represents an input vector, w(k) represents a gaussian process noise, z(k) represents an observation vector, h(x) represents an observation function, and v(k) represents a gaussian observation noise; and Step 3, the EKF algorithm mentioned above is encoded with software, and computational simulation is performed, thereby obtaining an input concentration estimated value. According to the observation method and the observation system, the method expanding Kalman filters to perform input state observation is designed, so that the validity of a designed observer is verified in simulation; in addition, the precision of the estimated concentration is ensured; the expected design purpose is achieved; and an ammonia gas sensor or an NOx sensor at an inlet can be replaced completely.

The invention relates to a coupling calculation method based on granular matter mechanics and a finite difference method, and belongs to the technical field of calculation of rock mechanics. In terms of limitation of an existing discrete medium and continuous medium computational simulation method, a method that any position on the surface of granular flow/finite difference grid is coupled is adopted to achieve transmission of interaction force of boundaries of two different media, granular flow and finite difference grids are calculated with the newton second law as a basis, and a rock and soil material calculation model with consideration of full coupling of discrete media and continuous media is established. According to the method, boundary coupling calculation of discrete media and continuous media can be effectively achieved, multiscale analysis can be conducted on stress characteristics of rock and soil bodies, and application of the granular flow and the finite difference method on the geotechnical engineering technical field is propelled forcefully.

The invention belongs to the field of material genetic engineering, multi-scale simulation and material big data, and relates to a multi-scale integrated visual high-flux automatic calculation processand data intelligent system, which comprises a material modeling system, a scientific calculation system, a server configuration system, a data storage system, a data analysis system and an artificial intelligence system. According to the method, an automatic construction method of a material complex model, various material calculation simulation methods with different scales, various types of material databases, a material performance analysis technology and a data mining technology based on artificial intelligence are combined, and 1000-magnitude material high-flux calculation simulation can be automatically carried out; material calculation simulation of multiple scales such as an electronic scale, an atomic scale, a molecular scale and a mesoscopic scale can be carried out, and errorspossibly occurring in the calculation process can be automatically corrected; all calculated structural data, intermediate metadata and result data can be stored in various types of material databases, so that a user can conveniently inquire and carry out data mining analysis.

A method for improving the catalytic hydrogen evolution performance of molybdenum disulfide is provided in order to solve the problem that the catalytic hydrogen evolution performance of molybdenum disulfide is not ideal at present, and the performance is greatly affected by the surface H coverage. By using density functional theory based on first principle, the VESTA material model software is used to construct several different models of different Ni doping sites and different phases. The catalytic hydrogen evolution performance of Ni doped 1T phase MoS2 is characterized by VASP software. The Ni doped 1T phase MoS2 with improved catalytic hydrogen evolution performance is obtained. By using the first-principles computational simulation method, Ni-doped 1T-phase MoS2 is successfully usedto adjust the bonding strength between H atom and catalyst surface to improve its catalytic activity for hydrogen evolution. It is found that the effect of Ni-doped 1T-phase MoS2 is similar to that ofPt, and its catalytic activity showed uniform excellence under different H coverage conditions.

The invention belongs to the technical field of oceanographic engineering, and relates to a method for detecting motion direction of a drag anchor in oceansoil, which comprises the following steps: firstly, measuring a motion track of an anchor plate along the direction of the upper surface of the anchor plate, changing an included angle of the motion direction and the upper surface of the anchor plate by using the measured motion track, and acquiring a group of motion tracks of the anchor plate along different motion directions by a computational simulation; secondly, measuring an actual position of the anchor plate by a probe in the embedding process; and finally, comparing the measured motion tracks with the actual position, wherein the minimum relative error is the motion direction of the anchor plate. Through the method, the motion direction of a drag anchor in any form in the invisible oceansoil is accurately and stably measured and a definite conclusion is given.

The invention discloses a single-amplitude quantum computing simulation method, which is applied to at least one computing node and comprises the following steps of: receiving data information and a target quantum state component of a target quantum program sent by a control node; constructing an undirected graph corresponding to the target quantum program according to a preset rule and the data information; wherein the vertex of the undirected graph corresponds to the quantum state of the operated quantum bit before and/or after the quantum logic gate is executed; wherein each edge of the undirected graph corresponds to a tensor, and elements in the tensor are jointly determined by a unitary matrix corresponding to the quantum logic gate and vertex values connected with the edges; receiving vertex values distributed by the control nodes; calculating an undirected graph according to the vertex value and the target quantum state component to obtain a target sub-amplitude; feeding back the target sub-amplitude to the control node; and combining each target sub-amplitude sent by each computing node by the control node to obtain the amplitude of the target quantum state component. By applying the embodiment of the invention, quantum computing simulation involving 50 or more quantum bits can be realized.

The invention discloses a method for eliminating a warping phenomenon in interactive prism grid generation. The method comprises the following steps: firstly, artificially interacting to generate a space propulsion grid of product surface grid boundary points; fairing components of propulsion normal vectors of boundary points of the object plane grid in X, Y and Z coordinate directions by using afairing algorithm, interpolating by using a radial basis function method to obtain a space propulsion grid of internal points of the object plane grid, and finally assembling to obtain a boundary layer prism grid for CFD calculation simulation; according to the method, an object plane grid boundary space propelling plane grid generated through manual interaction is optimized, the influence of thewarping phenomenon on the quality of the prism grid is eliminated through the technologies of normal vector fairing, radial basis function interpolation and the like, and the method has obvious technical advantages in the aspect of improving the generation efficiency of the prism grid and the universality of the method.

The invention relates to a complex terrain flood inundation process simulation method based on a cellular automaton. The method comprises the steps of: obtaining data information of an area to be simulated; based on the cellular automaton model, establishing a basic geographic scene of the flood inundation process model; determining a downstream cell in each central cell neighborhood cell; calculating the flow velocity of the cells at the t moment; determining the allocation weight of each central cell i for transferring the water quantity to the downstream cell of the central cell i within the next time step [delta]t at the moment t; calculating the next time step [delta]t at the moment t, and carrying out the water transfer calculation of the cells; determining an adaptive time step [delta]t of the model; calculating the water depth and the flow velocity of the cells at the t+[delta]t moment; returning to the step 4, and continuing iteration until the simulation duration requirementis met; and completing simulation of flood inundation. Compared with the prior art, the method has the advantages of realization of real-time simulation and massive calculation simulation requirements, high precision, good stability and the like.