利用Lin和Vitter的过滤思想研究了完全图的赋权median问题,并给出了一个近似算法.此算法可在最小化破坏背包约束的条件下求得问题的一个近似比为1+ε(任意ε〉0)的解.
The idea of filtering due to Lin and Vitter is used to study the weighted median problem in complete graphs, and an approximation algorithm is presented, which outputs a solution of approximation ratio 1 + ε ( arbitary ε 〉 0) to this problem with minimum packing constraint violations.