gradient sign的意思|示意

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。

The rADC in hyperacute and acute stage of focus center was minimized, and increased progressively from center to periphery with gradient sign.

超急性、急性期病灶中心相对表观扩散系数最低，从中心往外逐渐升高呈梯度征。

Two smoothed gradient estimate methods used in adaptive sign algorithm applied to adaptive echo canceling have been discussed in this paper.

以自适应回波对消为对象，讨论了两种自适应符号算法的梯度估计平滑方法。