What are physical model, conceptual model, mathematical model and computer model respectively?

① Expression of the system, process, thing or concept studied.

A model can be a physical entity, a diagram or a mathematical expression.

This method can greatly reduce the experimental workload and help to understand the essence of the process.

Some chemical processes, such as reaction process, are interactive processes of chemical reaction and transfer process (physical process), and it is often impossible for chemical reaction and physical process to meet the conditions of chemical similarity and physical similarity at the same time.

Therefore, the traditional methods of dimension theory and similarity theory are no longer applicable, and model method can be used for research.

(2) According to experiments, samples made of enlarged or reduced patterns are generally used for exhibitions or experiments.

③ Moulds for casting machine parts, etc.

mathematical model

It is a new discipline developed in recent years, and it is a science that combines mathematical theory with practical problems. It reduces practical problems to corresponding mathematical problems, and on this basis, it uses mathematical concepts, methods and theories to conduct in-depth analysis and research, thus depicting practical problems from a qualitative or quantitative perspective and providing accurate data or reliable guidance for solving practical problems.

First, the requirements for establishing a mathematical model:

1, true and complete. 1) is true, systematic and complete, and the image reflects the objective phenomenon; 2) It must be representative; 3) Extrapolation, that is, the information of the prototype object can be obtained, and the reasons about the prototype object can be obtained in the process of model research and experiment; 4) It must reflect the various achievements made in completing the basic tasks and should be consistent with the actual situation. 2. Concise and practical. In the process of modeling, we should reflect the essential things and their relationships, and eliminate the non-essential things that have little influence on reflecting the objective truth, so that the model can be as simple and operable as possible and the data can be easily collected while ensuring a certain accuracy. 3. adapt to change. With the change of related conditions and the development of people's understanding, we can adapt to the new situation well by adjusting related variables and parameters.