The new criterion includes the integral features of the whole field, while the theory of minimum strain-energy-density factor considers only a single point in the crack tip field.
较之仅着眼于纹尖场某一点的最小应变能密度因子理论，新判据更多地顾及到了尖端场的全局。
2
In this paper, a delay integral in quality are established. Applying this inequality to study the stability of large scale neutral differential systems, some simple stability criterion are obtained.