The combination of a N-S equation flow solver with a nonlinear optimization method is used to design a new airfoil with high ratio of lift over drag.

使用解析形状函数法和参数化翼型表示方法，将求解绕翼型流场的N S方程解与优化方法相结合，可设计出新的高升阻比翼型。

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Based on analysis of the effects of the pitch on heat transfer enhancement and flow resistance, the pitch was optimized by the constrained nonlinear optimization method.

通过分析内管螺距对强化换热和流动阻力的影响，采用有约束非线性优化方法对螺距进行了优化。

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A new nonlinear optimization method called variable metric gradient projection method is presented. It is a combination of mathematical programming with optimality criterion.

本文将数学规划法与优化准则法有机地结合起来，导出了一种新的优化方法——变尺度梯度投影法。

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