占线顶点覆盖问题的结构性下界

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在实际顶点覆盖选址过程中,经常会遇到如下的情形:在需要服务的边的个数未知的前提下,决策者需要决定在哪里建立初始的设施(或设施集),同时还要求,当新的设施建立后,前面已经建立的设施不能被删除.以往一般建立的模型和算法都是针对静态选址而言的,这里需要的是满足上述约束的动态选址模型.考虑了占线顶点覆盖问题,给出了一个不需要任何复杂性假设条件下的结构性的下界结果,并通过对一个限制性条件下的占线顶点覆盖问题给出算法并证明竞争性能比结果说明了所作的下界分析是紧的,同时证明了所给出的算法在非多项式时间内是最优的.
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