A method is proposed to solve time-cost trade-off model for activity networks by using the minimum cost flow principle.
提出了利用最小费用流原理求解时间-费用优化模型的方法。
Many work very long hours and receive little food, no time off and pay that is a fraction of any minimum wage, if it materialises at all.
很多的家政工人超长时间工作的同时只能得到很少的食物，并几乎没有休息的时间。如果把他们得到的工资物质化，将只占任何最低工资的一小部分。
A thorough career change usually will take a minimum of six months to pull off, and the time frequently stretches to a year or more.
通常一次跳槽需要六个月的过渡期，而且这段时间也可能长达一年或者更长时间。
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