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.
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.
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