The present paper gives a brief introduction to the generalized canonical statistical operator used by Robertson and suitable for nonlinear range far away from the equilibrium state and proposes an entropy expression of non-equilibrium as well.

• 本文简要介绍Robertson引入的、适用于非线性区(远离平衡状态)的广义正则统计算符,并给出非平衡态熵的表式。