Powell method is a direct searching method which can be used in electrical machine design.

鲍威尔法是一种可用于电机优化设计的直接搜索法。

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Powell method is used in the paper to calculate the reliability index, this method can avoid the complexity of partial derivative calculating, and the example shows that this method is correct.

研究了用方向加速法来进行结构可靠指标的计算方法，该法可以避免对功能函数进行导数计算，并已算例说明该方法的正确性。

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Powell method is used in the paper to calculate the reliability index, this method can avoid the complexity of partial derivative calculating, and the example shows that this method is correct.

研究了用方向加速法来进行结构可靠指标的计算方法，该法可以避免对功能函数进行导数计算，并已算例说明该方法的正确性。

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