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。
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。
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。
Each evolution takes place in a short time and is limited by the time box principle.
每一次进展发生得时间很短，并会受限于时间。
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。
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。
Software (or source) control, as the name implies, is a tool and an associated process that is used to maintain source code and its evolution over time. SCM provides these primary capabilities
软件（或资源）控制，正如其名字所暗示的那样，是一种工具和一种相关的过程，而这种过程被用于维护源代码及其演进。
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。
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。
By extracting data and providing visual feedback such as graphics that depict server load or response time evolution developers become aware of what is actually going on in a running system.
通过获取数据和提供可视化的反馈，例如描述服务器负载或响应时间的图表，会逐渐影响开发人员开始关注运行中的系统的状况。
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。
Humans also contain structures that mark where we came from and perhaps, which structures' evolution will take care of over time.
人类也有这些标记着我们从何而来的结构，也许还能由此了解它们曾经有过什么用途。
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。
“It’s a very clear-cut case of re-evolution because of the large time span, ” said John Wiens, the Stony Brook biologist who authored the paper in the journal Evolution.
约翰.威恩斯说“因长时间跨度而促使物种重新进化，这是一个非常明确的事例。”他是斯托尼布鲁克分校生物学家，同时也签约日报进化栏作者。
For a time, it was successful, but then evolution struck back, as natural selection favoured the spread of insecticide-resistant genes.
这种方法一时间非常有效，但接着蚊子重磅回击——大自然的生存法则让蚊子大军有了抗杀虫剂的良好基因。
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。
Web services provide the freedom of change and evolution over time, as long as it has an appropriate interface.
在有合适接口的前提下，Web服务提供了修改与完善的自由。
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。
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。
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。
In the paper, it has discussed the action of a phase on necessary and sufficient Condition of coherent state to remain its state on the time evolution.
本文讨论了相位因子对相干态在时间演化中保持不变的充要条件所造成的影响。
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。
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 increasing of the detuning results in the decrease of the oscillating frequency of the time evolution curve.
失谐量变大使时间演化曲线的振荡频率变慢；
If the magnetic field is fixed, the time evolution of the entanglement is periodic and is a sinusoidal function.
在磁场保持不变的情况下，纠缠度的时间演化呈现周期性变化的正弦函数形式。
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。
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。
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