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1·The nonlinear index of refraction induced by stimulated transition of high level populations in the gain medium is investigated.

研究增益介质中高能态粒子受激跃迁引起的非线性折射率。

2·The relaxation rate of upper level is equal to the transition probability of stimulated emission.

激光达到饱和强度时，上能级弛豫速率等于受激跃迁几率。

3·The thermally stimulated currents (TSC) and the ferroelectric phase transition of the ferroelectric ultrafine grain were investigated.

研究了铁电微晶粉粒的热刺激电流及其铁电相变。

4·The existence of the concepts possesses the rationality owing to their social economy level, and the transition needs to be stimulated by city resources.

农民保守观念的存在有其社会经济层面的合理性。