Production possibility set in DEA has two equivalent forms: sum form and intersection form. In comparison, the later one has more geometric visualization and convenience of calculation.
DEA的生产可能集有两种等价形式—和形式及交形式。相比较而言，交形式更具几何直观性及计算便利性。
The second way is channelized intersection and signal optimization based on the geometric and traffic conditions of intersection.
二是根据交叉口的几何情况和交通状况，对交叉口进行渠化和信号优化设计。
Because of the inevitable blur of a optogram, some geometric figures composed of intersection lines are of twisted cord illusions in reality.
这使得由于光学及视网膜的结构特点的原因使视网膜的像上模糊，某些由相交线构成的几何错觉图形，实际上是类“拧绳”错觉图形。
Because of the inevitable blur of a optogram, some geometric figures composed of intersection lines are of twisted cord illusions in reality.
这使得由于光学及视网膜的结构特点的原因使视网膜的像上模糊，某些由相交线构成的几何错觉图形，实际上是类“拧绳”错觉图形。
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