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Simulation calculation method and device based on data and model mixing

A simulation calculation and model technology, applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of system simulation calculation method and technology in a highly dynamic uncertainty environment that has not yet been found, and achieve the goal of improving adaptability. Effect

Active Publication Date: 2019-07-05
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current research results of methods and technologies, no system simulation calculation methods and technologies that can adapt to highly dynamic uncertain environments have been found

Method used

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  • Simulation calculation method and device based on data and model mixing
  • Simulation calculation method and device based on data and model mixing
  • Simulation calculation method and device based on data and model mixing

Examples

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example 1

[0105] The scenario calculation method is used to model and simulate the propagation and superposition effect of seismic waves after passing through buildings. Most urban buildings are arranged in the form of communities or blocks. Once an earthquake occurs, seismic waves will have a superimposed effect when passing through buildings with different arrangements, which may cause more serious damage to the buildings. At present, there is no effective physical model to accurately describe the superposition effect of seismic waves, and the influence of different building arrangements on the superposition effect of seismic waves cannot be estimated, which has a high degree of uncertainty and is complex to some extent. specialty. In this embodiment, the propagation of seismic waves through buildings is simplified as the problem of acoustic wave scattering of rigid spheres, such as Figure 4 shown. In the case of a single sphere, the scattered sound pressure in the spherical coordi...

example 2

[0111] In this embodiment, the field of traffic simulation is selected, and the modeling and simulation of the car-following system of motor vehicles is taken as an example to apply and verify the scenario calculation method. Such as Figure 8 As shown, the microscopic car-following system is a typical human-involved system. Due to the dynamic changes of the driver's psychology and behavior, the car-following behavior is highly uncertain. The embodiment of the present invention will combine real road experiments and calculation simulation experiments to analyze the improvement effect of the scenario calculation method on the modeling and prediction of microscopic car-following behavior, and then evaluate the adaptability of the method to uncertain environments.

[0112] Specifically, the embodiment of the present invention first constructs a scenario computing system oriented to the car-following system of a motor vehicle; secondly, designs a car-following experiment in the ph...

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Abstract

The invention discloses a simulation calculation method and device based on data and model mixing, wherein the method comprises the following steps of carrying out the generalization of a target system, forming a descriptive frame of the target system, specifying the uncertain elements of the target system, and building a plurality of concept models according to the descriptive frame and the uncertain elements; establishing a plurality of computer models according to the plurality of concept models, assigning a parameter and a variable value of each computer model, and exploring to obtain a plurality of prediction results of the target system according to the plurality of computer models and the parameter and the variable value of each computer model; and comparing the prediction results and the current observation data of the real system to obtain a deviation between the calculation system and the real system, and driving the calculation system and the real system to evolve jointly toobtain a simulation calculation result. According to the method, a modeling mechanism combining the data and model hybrid driving can improve the flexibility of a simulation system, and greatly enhance the adaptability to the real system changes.

Description

technical field [0001] The invention relates to the fields of data modeling, computer simulation and complex system science and technology, in particular to a simulation calculation method and device based on the mixture of data and models. Background technique [0002] In the field of computer simulation, researchers generally assume that the future is predictable. As long as a sufficiently realistic computer model (that is, a computing system) is established, people can accurately predict the future system state and evolution path. For a long time, research has focused on how to restore the components, structure and evolution mechanism of real systems as finely as possible. However, many application examples show that if the target system has a large amount of uncertainty, the traditional assumption is not valid. This is due to the uncertainty in the composition, structure and evolution mechanism of the system, which may change over time, and this change is usually unpred...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘奕陈永强王刚桥吴志鹏
Owner TSINGHUA UNIV
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