给出了分段线性函数族的定义和有关的运算性质，利用这些性质得到直接求解变分问题的一种新的数值方法。
The definition of the Segmental Linear Functions and some operational properties are given. By means of the properties, a new numerical method for direct solving variational problems is obtained.
将初等函数定义的两种提法进行比较，对分段函数与初等函数与初等函数的关系进行了探讨。
The two formulations of the initial function definition are compared and the relation between section function and initial function is discussed.
本文提出将给定函数或离散坐标点定义的曲线，分段用二次曲线拟合的计算方法。
A new calculation is presented, in which the given functions or curves defined by dispersed coordinate points are approximated by quadratic curve in several parts.
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