反转

Futhermore, the effect of Doppler broadening on laser without inversion is extented to another very important field of the interaction of the coherent field and atoms---the resonant fluorescence.

进一步地，本文把多普勒加宽对无反转激光的影响推广到光与物质相互作用的另一重要领域，共振荧光的研究中。

After studying the effect of Doppler broadening on the inversionless optical gain of a four-level system driven by a coherent field, the general results of the effect of Doppler broadening are given.

虽然无反转激光只需在上能级有少量的粒子数布居即可实现激光输出，但如何泵浦高激发态能级仍是实现短波长激光的主要障碍。

In chapter 4, for the first time, we studied the control role of the relative phase between the probe and driving fields on inversionless gain of the probe field in a closed and Doppler broadeningΛ-type three-level system with the spontaneously generated coherence.

结果发现：(1)不管探测场和驱动场是同向传播还是反向传播，驱动场是失谐还是共振，无反转增益总是随相对位相的改变而作周期性变化，周期为2π。

By using the numerical calculation results of the density matrix equations of motion of a closed Λ-type inversionless lasing system, the effects of the propagation of light fields on the gain of lasing without inversion, Rabi frequencies of the probe and driving fields, and the modulation role of spontaneously generated coherence on the effects were investigated when the Doppler broadening presents.

利用封闭Λ型三能级无粒子数反转激光系统密度矩阵运动方程的数值解，研究了存在Doppler展宽的情况下光场的传播对LWI增益、探测场和驱动场Rabi频率产生的影响以及有自发辐射诱导相干对这个影响的调制作用。

It is important to remember that they occur after a downtrend and usually mark a major trend reversal when complete.

重要的是要记住他们发生后的一个主要趋势，通常是马克当完成趋势反转。

Were found with gonadal dysgenesis in 3 cases and with sex reversal syndrome in 1 case.

大Y染色体与不良妊娠、性腺发育不全和性反转综合征等临床效应有一定的相关性。

Objective:To investigate the relativities of long Y chromosome and clinical effects,including infaust pregnancy,gonadal dysgenesis and sex reversal syndrome,etc.

目的探讨大Y染色体与不良妊娠、性腺发育不全和性反转综合征等临床效应的相关性。

Objective: To investigate the relativities of long Y chromosome and clinical effects, including infaust pregnancy, gonadal dysgenesis and sex reversal syndrome.

目的：探讨大Y染色体与不良妊娠、性腺发育不全和性反转综合征等临床效应的相关性。

The phenomenon can be explained by Einstein equation.

对相反转结构演化的体系我们进一步分析了在相分离过程中粘弹效应对流变特性的影响。

Boundary Element Method is applied to simulate electron optics system of multi-beam klystron with PRPM focusing in this paper.

摘要该文采用边界元软件TAU对具有周期反转永磁聚焦结构的多注速调管电子光学系统进行研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。