Before 1939 it was the accepted belief of scientists that it was theoretically possible to release atomic energy, but none knew any practical method of doing it.
1939年以前，科学家就已公认，理论上是可以释放原子能的，但没有人知道任何实际操作方法。
The energy release rate and failure criterion for mixed mode are investigated by means of the method of equivalent linear crack extension.
利用当量直线裂纹扩展法研究复合型裂纹的能量释放率及相应的断裂判据。
An energy method for determining fracture toughness of fibrous composite laminates was based on the theory of elastic energy release rate and crack-growth resistance in this paper.
应用线弹性断裂力学的弹性能释放率及裂纹扩展阻力等基本概念和理论，建立起确定纤维增强高分子聚合物复合材料断裂韧性的能量方法。
We use mainly the squariance method among sequence samples cluster analysis and the method of optimum partition, and combine the standard of release level of seismology strain energy to divide it.
主要使用了有序样品聚类分析中的离差平方和法、最优分割法，再结合地震学应变能释放水平进行划分。
The destructive ratio of energy in rock is analyzed, and the laws of energy release in rock mass are researched with the finite element method.
分析了岩石破坏比能，采用有限元方法研究了矿床开采过程中岩体能量的释放规律。
At last, the boundary collocation method is used to calculate the energy release rate.
最后，用边界配置法计算了能量释放率。
At last, the boundary collocation method is used to calculate the energy release rate.
最后，用边界配置法计算了能量释放率。
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