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在用平面变换技术实现密集信号分选时￣［１～３］，具有“多义性”──即有时会出现与某种信号的特征曲线形状相似的“伪特征曲线”．文中就平面变换技术多义性的原理进行了分析，论证了何种情况下会产生伪特征曲线．在此基础上，提出了识别伪特征曲线的方法和分选伪特征曲线的方案．多义性的分析使平面变换技术更完善和实用．
In the case of dense signal sorting using planar transformation techniques [1-3], there is “ambiguity” -that is, there sometimes appear “pseudo-characteristic curves” that resemble the shape of a signal’s characteristic curve. In this paper, the principle of the ambiguity of planar transformation technology is analyzed to prove the pseudo-characteristic curve will be generated. On this basis, the method of identifying the pseudo-characteristic curve and the scheme of sorting the pseudo-characteristic curve are proposed. Polysemy analysis makes the plane transform technology more perfect and practical.