用凸二次规划松弛方法研究工件具有就绪时间,目标函数为工件总拒绝费用与接受工件的带权总完工时间之和的工件可拒绝排序问题,得到界为2的多项式时间近似算法.
The method of convex quadratic programming relaxation has been used for the scheduling with rejection. The jobs have different release times. The objection function is total weighted completion times of the remaining jobs plus the sum of the penalties of the jobs rejected. A 2-approximation algorithm has been obtained.