Smart pressure sensor, and user can set the pressure range and the warning signal discretionarily.

智能型压力传感器，使用者可任意设定压力范围及报警点。

DAC_T resolves the problem that the subject can discretionarily decide that who and when can access his owned objects.

解决了主体可自主地决定其他的哪些主体可以在何时访问他拥有的客体。