目前常用的量算面积方法有方格纸法、平行线法、求积仪法。
Graph paper, parallel, and planimeter methods are current tools for acreage calculation.
不同抽样方法的比较结果，以平行线法效果最好，并确定了理论抽样数。
The compared results of different sample methods showed that them eans of the parallel lines was the best one and the theoretical sample number was also determined.
针对电力系统中平行线路的跨线故障，提出一种融合对称分量法与相分量法的大规模电力系统跨线故障计算方法。
In this paper, a method of large scale power system transient Stability evaluation by system decomposition -aggregation and transient energy function method is presented.
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