描述性研究法一共分为三类：观察法，案例分析法以及调研法。
There are three main types of descriptive methods: observational methods, case-study methods and survey methods.
通过使用状态空间法来分析和描述整个电力系统，我们保证了整个系统与实际电力系统的一致性。
Through analyze and express the whole power system with state space method, we assure the similarity of the system software simulated and real power system.
本案例描述了企业财务风险管理的一般性方法，包括定性分析法和定量分析法。
This case describes the general methods of corporate financial risk management, including qualitative analysis and quantitative analysis.
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