sign functions

The search direction is formed by using gradient projection, and the search directions and functions are controlled effectively by the sign functions.

利用梯度投影构造搜索方向，并使用符号函数对搜索方向和搜索函数进行有效的控制。

Analyzing the scaling exponents of EEG and the sign functions of EEG, the mean scaling exponents are found different in the wake and the different sleep stages.

在此基础上，计算了脑电信号及其符号函数的α指数，认为不同睡眠阶段的α指数具有相对显著的差异；

The proposed stable feedforward filter makes the control switching with sign functions to produce a continuous and measurable signal so that the actual control law is smooth.

前置滤波器使带有符号函数的控制切换产生连续可测信号，实际控制律是光滑的。

Generalized sign reversal functions and its application

广义变号函数及在实际中的应用

Communication is one of sign's basic functions. The communicative function endows great power to the sign world.

交际是符号的基本功能之一，符号的交际功能赋予了符号世界强大的生命力。

Some Theorems for Determining the Definiteness and Changeability of Sign of Functions and the Application to the Conditional Stability of the Motion of the Axis of a Sleeping Top

判别函数定号性和变号性的几个定理及其对睡陀螺轴运动条件稳定性的应用

A trademark can be considered as a sign of goods, functions of which are comprised of distinguishing origin, ensuring quality, exploiting market, building image, accumulating goodwill and the like.

商标是商品的标记，集来源识别、质量保证、市场开拓、形象塑造、商誉积累诸功能于一体。

In this paper an inclusion theorem of the equation's eigenvalues is obtained by using a concept about same sign of the functions.

利用同号函数这一概念，导出了积分方程特征值的一个包含定理。