2. Classification of similarity and modeling

Classification of similarity and modeling Venikov VA is shown in Figure 1. One of the signs of classification of modeling is usually chosen completeness model that separates models complete, incomplete and approximate. The basis of a full simulation is complete similarity, which is manifested both in time and in space. For part-time modeling is characterized by partial similarity model the object under study, including the main characteristics of the object being studied and excludes other (perhaps like in space or time). Approximate modeling based on approximate similarity, in which certain aspects of the functioning of a real object is not modeled at all.
In addition, the models studied objects also have a classification on the basis of:
1. The adequacy of the model to the original process or the original (the criteria for adequacy: the transition process, the oscillation, the stability of the region, etc.).
2. By type of model or design, the form language: logical (tables and charts), mathematical (analytical relationships that determine the operating conditions) and physical models (matching the original object object under study).
3. According to the type of modeling.
4. Methods for solving problems of modeling.
Figure 1. Classification of similarity and modeling

It should be noted that the analytical modeling of the process of functioning of elements of the system described in the form of certain functional relations or logical conditions. In this case, the model is studied analytically (characteristics are determined in a general way), numerical (obtaining numerical results with the specific initial conditions) and quality (establishment of some properties at the model) methods. Analytical method is widely used for simple systems. Numerical method allows you to explore a broad class of systems, but the resulting solutions are of a private nature and is effective when using a computer. When simulation simulated elementary phenomena constituting the process, preserving its logical structure and sequence of the flow of time.
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