查询词典 coherence

In chapter 3, based on the work of chapter 2, we firstly investigate the effect of the spontaneously generated coherence on gain of lasing without inversion in a closed three-levelΛ-type atomic system with Doppler broadening.

这些结论是与以前关于封闭Λ型系统中Doppler展宽对LWI增益影响的研究结果即增益(或强度随Doppler展宽值的增加而单调减小大不相同的。

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。

When hearing the sad news of the magnitude 8 earthquake, the whole world was shocked. Days of grievous but touching reports objectively broadcast the actual conditions in disaster areas, while, at the same time, demonstrate the national ebullition of unprecedented coherence in disaster.

八级地震的噩耗传来，全世界为之震惊，日复一日既令人揪心又令人感动的新闻报道，在客观传送灾区实况的同时，展现出大灾之后整个民族所迸发出的空前凝聚力。

The results show that the changes of spatial degree of coherence in x and y oriention and the ellipticity influence the tolerance between peak and valley.

结果表明，x和y方向的相干度变化，以及光束偏心率的大小都直接影响着归一化曲线的峰谷间差值△T的大小。

Methods One hunderd amd ten human subjects (one hunderd and seventy-four eyes) were included in this research. Retinoscopy was made to measure refractive errors, corneal topographer was measured by corneal topography system, Tonometry was used to measure IOP, Ultrasonagraphy was applied to measure anterior chamber length, len thickness and vitreous length respectively, Laser interference biometer was used to measure axial length, Optical coherence tomography was used to measure retina thickness of fovea area. Based on spherical equivalent subjects were divided into four groups: emmetropia group (SE0.50D), low-myopia group (-0.50D≤SE3.00D), moderate myopia group (-3.00D≤SE6.00D) and high myopia group (SE≥-6.00D).

对近视患者及正视者110例（174只眼），主觉加检影验光行屈光检查，采用Humphrey测量角膜平均曲率，非接触式眼内压测量仪测量眼内压；A与B型超声诊断仪测量前房深度、晶状体厚度、玻璃体腔长度及眼轴长度；角膜测厚仪测量中央角膜厚度(CCT，centercornealthickness)；光学相干生物测量仪测量眼轴长度；光学相干断层扫描仪测量黄斑中心视网膜厚度；按等效球镜度数(SE， sphericalequivalent)不同分正视组(SE0.05D)、轻度近视组(-0.50D≤SE3.00D)、中度近视组(-3.00D≤SE＜-6.00D)、高度近视组SE≥-6.00D）。

So overlapping entailment is the key to understand the coherence across different metaphors of the same concept.

因此，重叠蕴含是理解同一本体不同喻体间连贯性的重要依据。

With the widespread application and rapid development of the computer science and Internet technology, the expert estimates that the requirement of storage capability would be increased by the rate of 50%--100% every year;to lots of corporations, as a result of their work request, the data must be in online state everywhen. So, at the time of available data are extremely increased, how to protect the security, integrity and coherence of the data effectively and how to enhance the high availability in storage management software has become an important target.

跟着盘算机和互联网络技术的普及应用和飞速发铺，业界的剖析家估量，对存储容量的需求以后会以每年50%—100%的速度递增；对众多企业而言，因为其工作性质的请求，致使数据必需在每天24小时、每周7天、每年365天处于可使用状况，所以如何在数据呈现爆炸式增加的同时，更有效的维护数据的安全、完全和一致，更有效的提高管理体系的高可用性已成为各种存储管理软件追求的主要目的。

Competition among four-wave mixing with two dressing fields, the six-wave mixing with one dressing field as well as the eight-wave mixing propagating along the same direction can be evoked by adjusting laser beams because these multi-wave mixing signals are induced by atomic coherence between common levels.

研究发现，通过调节激光束方向，沿同一方向出射的八波混频、双缀饰四波混频和单缀饰六波混频信号因共用能级的原子相干产生而出现竞争现象，通过控制缀饰场减弱四波混频和六波混频信号强度，可以达到增强八波混频信号的目的。

Therefore coherence is produced only along field lines, and cannot be produced between radiations from different field lines.

因此相干只发生在沿着磁力线方向，而相邻磁力线的辐射之间便不存在着相干。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。