用集合的近似凸性研究函数的拟凸性。

Quasiconvex functions are studied by applying nearly convexity of sets.

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在第5节，我们用偏序集拟阵的余秩函数来研究偏序集拟阵与其对偶之间的关系。

In Section 5, we use the corank function of poset matroids to investigate the relationship between a poset matroid and its dual.

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基于预应力损失理论，建立了具有普遍意义的拟摩阻损失函数简化解析算法。

Based on prestress loss theory, a simplified analytic algorithm of virtual frictional loss function was set up in a universal way.

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