同时对机构进行了静态和动态特性理论分析，提出了机构静态和动态计算解析式，并用有限元方法对机构动态和静态特性进行了验证。
Theoretical analysis is done on the static and dynamic characteristics of the structure, differential equations are presented, and it is also verified by the finite element method.
采用塑性铰线理论，对三种可能的塑性铰线形式分别进行分析，得到极限承载力的解析式。
Using plastic yield line theory, three yield line patterns are analysed and the formulas of the ultimate bearing capacity are obtained.
采用理论分析、行为解析、观察、访谈等方法，对网球运动中重要的环节——接发球的基本技术和战术进行了比较全面的探讨。
Through using the method of theoretical analysis, observation and interview, this paper made comprehensive discussion on basic technique and tactics of receive a service of tennis.
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