A quasi analytic method for solving structural optimization problems is developed by coordinated use of mathematical transformations, high quality approximation and two level approximation strategy.
协同利用数学变换、高精度近似和二级逼近策略，提出了一种求解结构优化问题的准解析法。
The time series and the analytic set up method of the electro integrated NC hydraulic station are studied. The mathematical model is analyzed for application.
论述了电液集成数控液压站液压控制系统的时间序列和时序分析建模方法，对所建立的数学模型进行了应用分析。
Based on the idea of finite analytic method, an interpolation function is used in place of the analytic solution, and a mathematical model is established.
本文基于有限解析法的基本思想，用单元内插值函数近似地代替单元内的近似解析解。
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