定义了区间I上的均匀可导函数，给出了区间i上函数均匀可导的两个充要条件。
The uniformly derivable function on the interval I is defined, and two sufficient and necessary conditions of uniformly derivable function are given.
并提出了一种基于路段变量的连续可导的边际函数和距离函数，从而把两层规划转化成单层规划问题。
The traditional bi-level model formulation of these problems is transformed into a single-level continuously differentiable problem using a marginal function approach.
引入非中心差商极限概念，讨论了非中心差商极限存在与可导的关系，以及对称导数在研究函数性质方面的一些应。
The relation between noncentral difference quotients convergence and derivative was discussed by drawing the concept of noncentral difference quotients convergence in this paper.
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