把对最大割问题进行秩二松驰的思想应用到二次背包问题上，得到二次背包问题的秩二松驰模型。
The idea of rank two relaxation for max-cut problem is used to quadratic knapsack problem, and the model of the rank two relaxation for quadratic knapsack problem is obtained.
本文讨论了几何不变及几何可变体系和张拉集成体系的动力松驰解法。
The geometric stable and unstable as well as tensegric systems were analyzed by dynamic relaxation.
讨论了关于应力松驰问题的计算思路和解决方法。
The paper discusses the calculation thought and solution about stress relaxation.
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