在拱坝优化设计中采用了约束变尺度算法，提高了优化效率；
Restrain alteration size is applied to improve the efficiency of structure optimization.
在BFGS变尺度算法中所用的一维搜索方法是二次插值算法。
The one dimension search method of second differential algorithm is used in the Variable metric method of BFGS.
在分析REM算法和最优化流控模型的基础上，改用非线性优化理论的变尺度算法计算链路影子价格，从而改进了REM算法。
The REM algorithm is improved on the basis of analysis of REM algorithm and optimization flow control model.
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