应用已有的极点理论，优化相伴凸组合的界并改进整数规划问题的目标函数及变量的界。
Assuming knowledge of extreme points, we develop bounds for associated convex combinations and improve bounds on the integer programming problems objective function and variables.
采用损伤演化方程可以从宏观上描述损伤变量以及与其相伴的广义热力学力——损伤能量释放率的变化规律。
The variation rule of the damage variable and the coupled variable, damage energy dissipation rate, can be described on macro aspect by the damage evolution equation.
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