以加工时间最短为目标，对机加车间工件加工问题建立数学模型。针对标准遗传算法(SGA)求解存在的早熟收敛、求解精度低等问题，提出一种改进的遗传算法。-Aiming at the shortest processing time, the mathematical model of machining workpieces in machining workshop is set up. Because of premature convergence and low precision for s