Entropy preservation of the system is discussed combined with the concept of entropy loss rate of information source and entropy acquisition rate of information sink.

• 结合信源熵损失率和信宿熵获取率的概念,讨论了此通信系统的保熵性,指出crt显示器显示图像时系统不具备保熵性而显示文本时具备保熵性。