In these years, there have been deep changes in ideas, contents and methods of mathematical education.
近年来，数学教育的观念、教学内容和方法正发生着深刻的变化。
In this article, the optimization ideas of system analysis methods using in water power utilization planning are stated according to the mathematical models and a computation case.
通过应用数学模型，并举了一个算例，来说明系统分析方法中的优化思想在水能规划中的应用。
This nonlinear programming mathematical is based on the actual production in Zhenhai Oil and Chemical plant. The ideas and methods given in the paper may be applied to other plants.
这个非线性规划的数学模型是根据镇海石油化工总厂炼油生产的实际情况而提出的，但本文指出的建立模型的思想和方法也可以应用在其他工厂。
Copyright protection shall extend to expressions and not to ideas, procedures, methods of operation or mathematical concepts as such.
版权的保护仅延伸至表达方式，而不延伸至思想、程序、操作方法或数学概念本身。
Use symmetric point and methods to study mathematical problems, is one of the important ideas in solving some geometric problems.
利用对称的观点和方法研究数学题，是解决某些几何问题的重要思路之一。
Use symmetric point and methods to study mathematical problems, is one of the important ideas in solving some geometric problems.
利用对称的观点和方法研究数学题，是解决某些几何问题的重要思路之一。
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