for a shift meaning in English

出于权宜之计

Now for a shift in gears
现在，是进行”变档“的时候。
Abstract : a new algorithm w - ecop is presented to effect incremental changes on a standard cell layout automatically . this algorithm deals with cell inserting and cell moving based on rows instead of on cells as most placement algorithms usually do . an integer programming problem is formulated to minimize the adjustment on the initial placement and a heuristic method is presented to search for a shifting path so as to optimize the wirelength . test of w - ecop on a group of practical test cases shows that the algorithm can successfully accomplish incremental placement with good quality and high speed
文摘:提出了一种新的增量式布局方法w - ecop来满足快速调整布局方案的要求.与以前的以单元为中心的算法不同,算法基于单元行划分来进行单元的插入和位置调整,在此过程中使对原布局方案的影响最小,并且尽可能优化线长.一组从美国工业界的测试例子表明,该算法运行速度快,调整后的布局效果好