2)定期订货控制法所谓定期库存控制法(Fixed Interval System,FIS ),也叫固定订购周期法,是指按预先确定的订货间隔期间进行订货补充的一种库存管理方式。
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Fixed Quantity System (FQS) is more accurate and convenient than Fixed Interval System (FIS).
定量订货方式比定期订货方式更准确、更方便。
We'll just say here that a process must often wait for some event to occur, such as for a disk operation to terminate, a system resource to be released, or a fixed interval of time to elapse.
我们在这里只说，进程经常必须等待某些事件的发生。例如，等待一个磁盘操作的终止，等待释放系统资源，或者等待时间经过固定的间隔。
Simulation results show that compared with fixed training interval schemes, the improved algorithm can achieve better BER (Bit Error Rate) performance while keeping lower system overhead.
与采用固定训练周期相比，该方法可以在保证比较低的导频开销的同时，使系统获得更好的误比特性能。
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