模态

For these states, I study the mean photon number distribution and their non-classical properties, which are photon antibunching, violations of Cauchy-Schwarz inequality and two-mode squeezing. Insection 4, I extend uncorrelated two-mode SU(1,1) coherent states to the multi-mode SU(1,1) coherent states.

对这些态，我们研究了平均光子数分布及其非经典特性，它们包括光子聚束，Cauchy-Schwarz不等式的违背和双模压缩。

A scheme is presented to generate the entangled squeezed coherent states via the nonresonant interaction of a two-level atom with a two-mode cavity field.

提出一种利用一个二能级原子与一两模腔场的非共振相互作用制备纠缠压缩相干态的方案。

The results showed that intermidiate 1, 2-propanediol-sebacate of low relative molecular mass was synthesized with toluene-p-sulfoinc acid as catalyst, benzene as watercarrying agent, and of mole ratio of sebacic acid to 1, 2-propanediol of 1:4. The glass-transition temperatures of PPSC were below 0 ℃ which confirmed that PPSC would be in a high-elastic state of ambient temperature and human body temperature. PPSC was a elastomer with moderate crosslinkage, low module and high elongation, and had rapid degradation ratio (degradation degree more than 50%) in phosphate (pH value 7.4) at 37℃.

结果表明，以对甲苯磺酸为催化剂、苯为带水剂，在酸醇比为1，4的条件下可合成较低相对分子质量的中间体癸二酸聚酯二元醇；PPSC弹性体的玻璃化转变温度在0℃以下，于室温及人体温度下处于高弹态；PPSC为适度交联的、低模量高伸长的弹性体，其在37℃、pH值为7.4的磷酸盆缓冲溶液中具有较快的降解性（降解度超过50%）。

These results show that: 1.when two or more states superpose each other the variations of their relative phases can exert a tremendous influence on the results of superposition;2.the superposition of two same stases with distinct phases can produce a new state which is totally different from the original states.

由于这个相因子的模方等于1，所以它对粒子的几率分布是不会有影响的。或者说，ψ和ψeiα所描述的是同一个量子态。显然，在空间的任何一点|ψ|2和|ψeiα|2的值也都是相同的。并且，如果ψ是归一化的波函数，则ψeiα也是归一化的。

A metastable helium atomic beam effused out of atom source is firstly cooled transversally by laser. This well-collimated atomic beam traveling through the light standing-wave whose direction is perpendicular to atomic beam is quenched, and channeling effect happens in atomic density distribution.

亚稳态原子束从原子源喷出后首先对其进行横向激光冷却，准直后的原子束穿过与之垂直的激光驻波场时发生淬火过程，原子的密度分布出现沟道化效应，给出基于光掩模制作纳米图形的基本原理、理论分析及模拟结果。

To meet the needs, a novel low-noise fiber laser with compound cavity structure is designed. The stable single-mode operation is realized by using a transient self-written fiber grating, produced by the effect of saturable absorption within a section of unpumped erbium-doped fiber, as narrow band filter for mode selecting and linewidth squeezing. Through optical path modification, the spectral signal-to-noise ratio is better than 62 dB.

激光器采用复合腔结构，以掺铒光纤作为工作物质，通过在未被抽运的掺铒光纤中形成的瞬态自写入光纤光栅的窄带滤波特性进行选模和压窄线宽，产生稳定的单频激光输出；经过光路改进，激光输出光谱信噪比优于62 dB；利用光电负反馈电路，弛豫振荡峰下降了约25 dB，低频段强度噪声也大为改善，有效地抑制了光源的强度噪声。

The result indicates that both the atomic motion and the field mode structure can modulate the fidelities of quantum states in the system of interaction.

结果表明：在一定的条件下，原子运动的速度和场模结构参数可调制相互作用体系的量子态保真度。

The former can provides a shorter path and least action to reach the desired equilibrium point; and the latter proposes a class of linear sliding-mode, which not only guarantees global nonsingular but also uncouples the original control system.

改进的PID控制律保证了闭环系统能够沿最短路径趋于稳态值；解耦变结构控制律直接针对完整的四元数设计一类线性滑模，从而避免了奇异问题，而且对原控制系统解耦。

The shaping course of Fine blanking is very complex. Material forms a local plastic cutting area between punch and bottom die, and brings violent plastic flow under the effect of press stress. The grad of stress and strain is great, and it is an unstable transmutation process that came through an elastic distortion, plastic distortion and cut rupture.

精冲成形过程非常复杂，材料在狭窄的凸、凹模间隙附近形成了局部塑性剪切带，在压应力的作用下产生强烈的塑性流动，应力应变梯度很大，是一个经历弹性变形、塑性变形和剪切断裂的非稳态大变形过程。

The applications of modified Jameson's scheme to the complex flow around the missiles with canards and tails, result in good agreement between computations and experiment data of the standard missile model of U.S.A..

将改进的Jameson格式应用到多翼导弹的三维流场计算中，并使用分区技术和三维椭圆微分方程数值网格生成技术以精确模拟此复杂构形的复杂流态，计算结果与美国导弹标模的实验吻合很好。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。