Zhang et. al. [26] also proposed an adaptive trust region method, in which the trust region radius depends on the gradient and Hessian of the current iterate point.

• 章祥荪等在文[26]中也给出了一种自适应信赖域算法，它利用当前迭代点的梯度和海赛阵信息来选取当前迭代步的信赖域半径。