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Molecular formula :

nature : to examine the system, process, thing or concept of a form of expression. Models can be physical entities and there can be some kind of graphic or a mathematical expression. With this approach can greatly reduce the workload experiment, but also help to understand the process of substance. Some chemical reaction process if the process is chemical reaction with the transfer process (physical process) interactive process, chemical reactions and physical processes are often impossible to meet similar chemical and physical conditions similar. So the traditional dimensional theory similar method is no longer applicable, then model can be used for research.

Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".
Please see below "More Detailed Data"
More Detailed Data:
1) grey model
2) band model
3) fuzzy model
4) Cossee model
5) Sukata model
6) design model
7) atomic model
8) atomic model
9) control model
10) optical model
Notice Some description was translated by software and the data is only as a reference.
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