The structural design and its rule of water borne polyurethane modified with acrylic resin was studied in this paper.

采用丙烯酸树脂对水性聚氨酯改性，研究了经丙烯酸树脂改性的水性聚氨酯的结构设计及其规律。

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This paper reports on the modified feasible direction method, a new method of structural optimization design.

本文提出了一种结构优化设计的新方法——改进的可行方向法。

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By using the optimization method and procedure modified by the authors, the stope structural parameters of a deposit with instability tendency are optimized for the mining design of this deposit.

采用作者改进的优化方法与程序，对某失稳倾向矿床的采场结构参数进行了优化研究，获得了该矿床开采设计较优的采场结构参数。

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By using the optimization method and procedure modified by the authors, the stope structural parameters of a deposit with instability tendency are optimized for the mining design of this deposit.

采用作者改进的优化方法与程序，对某失稳倾向矿床的采场结构参数进行了优化研究，获得了该矿床开采设计较优的采场结构参数。

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