In the paper, the technique of drawing a smooth curve of non-reduced or non-increased single-valuedfunction is improved so that the capillary pressure curve can be drawn rationally.
本文对非降或非增单值函数光滑曲线的绘制方法进行了改进，从而合理地绘制出毛管压力曲线。
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In this paper the describing function of single-valued symmetric nonlinear characteristics is analysed and simplify methods (Lemma 1. Lemma 2. Theorem 1) Dcaculating description function are proved.
As a tensor-valuedfunction with a single tensor variable, i. e. strain, stress is expressed as a tensor polynomial that contains high order elasticity tensors.