Based on the structure preserving model, according to the variation of transient energy in power network, line vulnerability index and outset vulnerability index are defined.
在结构保持模型的基础上，根据网络中暂态能量的变化规律，定义了支路及割集的脆弱性指标。
2
Based on the comparison of landscape effect and its relevant water-energy budget, an index for assessing the stability of oasis is proposed and corresponding calculation method is established.
We go deep into discussing the studies on structural damage detection based on modal strain energy, and propose a new damage detection indexbased on the change of modal strain energy ratio.