碰撞理论直观地说明了反应速率与活化能的关系，但没有从分子内部原子重新组合的角度揭示活化能的物理意义。随着人们对原子分子内部结构认识的深入，1935年，艾林（H. Eyring) 在量子力学和统计力学的基础上提出了过渡状态理论。
用过渡状态理论和量子化学AM1方法，对4 甲基5 烯庚腈氧化物环加成反应机理进行了研究。
The reaction mechanism of 4-methyl-5-ethenyl-heptanitril e oxide cycloaddition is studied with the molecular orbital AM1 method and transit ion state theory.
利用旋臂式模型机动飞行试验机进行倾转过渡状态下旋翼瞬态拉力的试验研究，试验与理论计算结果表现出很好的相关性。
The experiment of transient rotor thrust during transition flight has been carried out on whirling beam test facility, and the experimental results show excellent agreement with theory.
分析了冷轧带钢在稳态轧制下的理论，从量的角度探讨了从一个平衡状态向另一个平衡状态过渡的可能性。
The theory of rolling cold strip in stable status is analyzed and the possibility of transformation from one equilibrium to another is discussed quantitavely.
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