The express of the time paraments on thread line network chart, and the special form of network chart with time scale and the special form of network chart with no time scale, is discussed in this paper; further more, a new form of network chart with total time scale that can express totally all the time paraments, is pressented.
讨论了箭线式网络图上时间参数的表示和带时间坐标网络图，不带时间坐标网络图的具体形式，提出一种新形式的可全面反映全部时间参数的全时间坐标网络
According to the concept of relative time coordinate system,a new exponent model and its grade predicting method are proposed.
结合相对时间坐标系的概念,提出了一种改进的指数预测模型及其分级预测方法,并对双曲线模型进行了推广。