Some relationships among the support function and indicator function of a convex set and their second-order epi-derivatives are given.

利用集合的表示函数、支撑函数、距离函数和投影等研究闭凸体的典范表示及点到边界的投影特征。

Discussed a reason discoloration range of acid-base indicator function reason in a text book, pointed out some discoloration reason problems in the book.

探讨了一本教材中关于酸碱指示剂作用原理的理论变色范围探讨，指出了该教材在理论变色范围推论中存在的问题。

Message type indicator (MTI) — Four numeric digits that specify the version of the ISO8583 standard, message class, message function, and message origin.

消息类型指示符(MTI)——4个数字，指定ISO 8583标准的版本、消息类型、消息功能和消息的发起位置。

Because map takes one argument, a function, we can use the "placeholder" indicator _ instead of a named parameter.

因为map接受一个参数，即一个函数，我们可以用_占位符来替代有名参数。

We use ascendency as a goal function or indicator of system performance.

我们利用优势为目标的功能或系统的性能指标。