Considering the initial atomic coherence and the detuning, dipole squeezing of a two-level atom interacting with squeezed vacuum field is studied by means of the time-evolution operator method.
文中采用时间演化算符，考虑到初始原子相干性及失谐量，研究了单个二能级原子与压缩真空态辐射场相互作用中原子的偶极压缩。
A governance organization that provides training and support and oversees NIEM's evolution over time.
一个提供培训和支持并监督niem随时间的演变的治理组织。
WHEN Charles Darwin opened his first notebook on the subject of how organisms change over time, the field was not even referred to as “evolution”.
当查理斯达尔文打开他的第一本笔记本来研究生物体如何变化的时候，他研究的这个领域还没有被称作“进化论”。
Model image: This diagram shows the evolution of the largest network of Telenor iPhone users over time.
模型图片：图片显示挪威电讯iPhone使用者中最大社交网络在一定时间内的演化。
These tools promote industrialization of the software development process, and reduced costs and time to market, allowing increased productivity and faster reactions to demands for evolution.
这些工具促进了软件开发过程的工业化，降低了投入市场的成本和时间，同时还提高了生产率，加快了对进化需求的反应。
As the evolution into three species would have taken extreme lengths of time, combined with the lack of fossil records in Africa, the team concludes that Asia was the most likely origin.
由于要进化成三个不同的物种需要特别漫长的时间，结合在非洲没有发现有关化石的记录，考古队得出结论，亚洲是该物种最有可能的起源地。
We have obtained the electron density distribution in the normal direction of different targets. The time evolution of electron density of Cu plasma has been obtained.
获得了不同靶材料等离子体的靶面法向电子密度分布，以及铜等离子体电子密度的时间演化。
In particular, with time evolution, distribution and swing of the mean spin direction is closely related to the structure of the space where the initial coherent state centred in.
特别是随着时间的演化，系统的平均自旋方向的分布和摆动也与初态所处的空间结构有着密切的联系。
Under the time evolution in a vacuum thermal reservoir, quantum nonlocality of the two kinds of entangled states decreases gradually and disappears finally.
在真空热库中随着时间的演化，两种纠缠态的量子非定域性逐渐减弱直至消失。
The results indicate that the time evolution function of charge or current is the Jacobian elliptic function instead of a sine one, and the squeezing effect appears periodically in the circuit.
结果表明：电荷与电流的时间演化函数由雅可比椭圆函数替代，而且在电路中显示周期性压缩效应。
The time evolution of system in two photon Jaynes Cummings (J C) model without rotating waves approximation (RWA) is obtained by using the theory of ordinary differential equations.
采用常微分方程理论研究了无旋波近似下双光子J-C模型系统的时间演化。
Deeper evolution — as it might be formally defined — is about how the rules for changing entities over time change over time.
更深层次的进化——就像其可能有的正式定义——是关于随着时间迁延而改变实体的规则是如何随时间迁延而变化的。
In preparation for the next evolution or project, you should develop recommendations about what to change next time; make decisions and put them into action.
为下一个演变或者项目做准备的过程中，您应该对下一次应该有什么变更提出建议，做出决定并将它付诸于行动。
Geneticists speak of the “molecular clock” that recordsthe passage of time. These molecular data also show how variousorganisms are transitional within evolution.
遗传学家所说的“分子钟（molecular clock）”记录了这一进程，这些分子数据也说明了进化中各物种的过渡关系。
The results show that the field entropy evolution properties are similar to the time evolution of atomic particle's occupancy.
结果表明，场熵的时间演化规律与原子布居差的时间演化规律非常相似。
The classical mechanical time evolution equations are found as the classical limit case of the evolution equations.
经典力学运动方程是我们所得演化方程的经典极限。
For the first time, evolution will be on the national curriculum for primary schools when the new version is published later this year.
今年晚些时候新版国家小学教程发行时，进化论将破天荒的囊括其中。
By the time humans came around, evolution had forged a pretty firm foundation for a moral sense.
当人类出现时，进化过程已经在其身上建立了道德感的牢固基础。
Reported in April and known from two 1.9-million-year-old skeletons discovered in a South African cave, Australopithecus sediba offers a glimpse of a hazy time in our lineage's evolution.
从4月报道获悉，在一个南非洞穴中发现了190万年前的的骨骼，南方古猿sediba让我们依稀窥见到我们人类进化的朦胧历史。
Both Creationists and Evolutionists agree that if evolution is at all possible, there needs to be an excessive (if not infinite) amount of time.
创造论者和进化论者双方都同意：如果进化是可能的，则需要有一个很长的(如果不是无限的)时期。
WiggleZ scientists have made a 3-D map of more than 150,000 galaxies near and far to trace the universe's evolution over time. [Chris Blake et al.
该项目科学家制作了一个包括不同距离超过150,000星系的三维天图，来追溯宇宙的演化过程。
For the first time in history, the international community could watch a pandemic unfold, and chart its evolution, in real time.
历史上第一次，国际社会可实时目睹大流行病的发生，勾勒其演进轨迹。
The foodstuff environment has changed in a short time, but evolution has not, and there's a real mismatch now.
食品环境在短时间内就能改变，但是进化不能，于是就有了错位。
The distribution and time evolution of the eddy current losses are also discussed in this paper.
文中给出涡流损耗的分布及其随时间变化情况。
At the same time, a technology evolution in the form of Service-Oriented Architecture (SOA) provides a foundation to achieve software reuse.
同时，面向服务的体系结构 (SOA) 方面的技术演变为实现软件重用提供了基础。
If "phone" was an attribute of the employee element, then it can exist only once per employee, and we could not add child elements too it, which may hinder schema evolution over time.
如果“phone”是雇员元素的一个属性，那么对于每个雇员，它只能出现一次，我们也不能为之添加子元素，这将妨碍模式随时间而变化。
With this evolution, ordinary Poles began to distinguish for the first time between Germans in the (Communist) East and in (democratic) West Germany.
随着事态演变，普通波兰人第一次把东德与西德区别开来。
The two level atom′s decoherence is suppressed when the time evolution properties of an external driving field satisfy certain conditions.
当外加驱动场的演化规律满足一定的条件时，可使两能级原子的消相干被消除。
The two level atom′s decoherence is suppressed when the time evolution properties of an external driving field satisfy certain conditions.
当外加驱动场的演化规律满足一定的条件时，可使两能级原子的消相干被消除。
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