查询词典 inversion

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。

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。

An inversion of the source, double-precision data can be called directly.

一个求逆的源程序，双精度型数据，直接调用即可。

Terrain shadow causes cooling to begin in basin before sunset. Radiative cooling and cold downslope wind development are two basic reasons for the formation of cold air lake and inversion in the basin.

地形遮蔽的影响使日落之前盆地中的冷却过程即已开始，地表辐射冷却及坡面冷迳流的发展是夜间冷湖和逆温形成的根本原因。

The result of processing dual laterolog successive curve indicate that the inversion method performance well.

通过实际多口井连续曲线的反演处理表明，本文提出的反演方法合理而且有效。

The section inversion lies on the different change laws of dynamic resistance coefficient of polymer solution in the high and low permeability layers.

剖面返转的根本原因在于聚合物溶液在高、低渗透层中的动态阻力系数表现规律不同，高渗透层中阻力系数呈对数式上升。

The schemes presented in the present paper can be used for solving general problems, and their basic ideas can be directly used for treating elastic scattering problems as well as for establishing schemes for velocity and density inversion.

所建立的数值计算方案具有普遍的适用性，其基本思想可以直接用于解决弹性波散射的数值模拟问题并用于反演密度和速度。

And by using IM, the RCS of a dielectric plate and array antennas of dielectric cylinders guiding electromagmetic field with finite length are calculated. IM method gets rid of the inversion of a large matrix and its solution can be fast convergent, so it is simple and especially fit for solving the problems with which the high-frequencies and the low-frequencies deal difficultly.

本文所作主要工作及贡献如下：（1）在考虑馈源匹配良好的状况下，用各种高频近似法对卡塞格伦天线、二维与三维反射面天线的电磁散射与RCS进行了全面地分析计算，并对旋转反射器表面形状进行了低RCS外形优化设计。

Finally, the methods are applied to the inversion of electromagnetic wave log in oil field.

最后，将方法应用于石油领域的电磁波测井解释反演问题中。

Elementary transformation, matrix inversion using a written calculation method...

初等变换法，矩阵求逆用的是笔算时惯用的方法，需要高斯消去法的朋友请参看有关资料。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。