Solid laser is a four-level system.
固体激光器是一个四能级系统。
A data transformation interface was developed to get the four-level product model.
开发了数据转换接口，获得了四层次的产品模型。
The Kerr nonlinearity of a left-handed material is analyzed in a four-level atomic system.
分析了四能级原子系统中左手材料的克尔非线性特性。
We studied the optical bistability for four-level system with single and triple state typical of organic media.
对一种有着单重态和三重态的典型的有机物的四能级系统的光学双稳进行了研究。
The tower sits atop a four-level podium that houses large banquet, meeting, dining, fitness and spa facilities.
塔楼在四层裙房内包含了大型宴会厅，会议中心，餐饮区，健身中心和SPA设施。
The rate equation of tunable pulse ti: sapphire laser is given using the theoretical model of four-level system.
以四能级系统为理论模型对脉冲可调谐掺钛蓝宝石激光系统建立了速率方程。
This paper describes in detail the method to analyze the Phase jitter in the four-level PWM fibre optic communication systems.
本文详细介绍了四进制pwm光纤通信系统相位抖动的分析方法。
The temporal behavior of DFWM and holography in four-level saturable and reverse saturable absorbers was analysed theoretically.
对四能级饱和与反饱和吸收介质的简并四波混频和全息随时间的变化行为进行了理论分析。
The time characteristics of a pulsed ti: sapphire laser have been studied theoretically based on the rate equation of four-level system.
本文从四能级结构激光速率方程出发，对脉冲掺钛蓝宝石激光器的时间特性进行了理论研究。
In this paper, a direct instantaneous torque control (DITC) of switched reluctance motor (SRM) with a four-level converter is presented.
主要论述了基于四电平功率变换电路的开关磁阻电机直接瞬时转矩控制。
In this paper, we use the dressed-atom approach to derive the analytical expression of the gain of a FIR laser with a four-level system.
本文用缀饰原子方法解出四能级系统远红外激光增益系数的解析表达式。
The four-level flexible office space holds most of the usual workplace amenities, such as individual offices, conference rooms and rest areas.
四层灵活办公空间拥有最普通的办公设施，如私人办公室、会议室、休息区等。
The concept was to create a four-level diaphanous structure, which integrates all functions of living and working and yet offers enough privacy.
设计理念是创造出一个四层的透明体量，将所有的起居和办公功能都包含在一起，但同时为住户提供极大的隐私性。
A simplified analytical expression of maximum single frequency output is obtained by the analysis of a homogeneously broadened four-level system;
通过对四能级均匀加宽激光器单频功率的分析得到最大单频输出功率的简化解析结果；
The System consisted of four-level network systems, viz. the Ministry of Railways Administration, subadministration, station and depot level network systems.
工程设计分为铁道部、铁路局、原铁路分局、站段四级网络系统。
Video content is described by characteristics extracted on four-level framework including shots, video objects, video object planes and video object regions.
本文提出了一种基于视频对象的视频内容分级描述模型。
This thesis mainly discusses the physics mechanism of lasing without inversion and proposed a closed four-level atomic model for the lasing without inversion.
本文主要的探讨了无粒子数反转激光的物理机制，建议了一种封闭的四能级无反转激光模型，并证明它也能够呈现无粒子数反转光放大现象。
In the closed microcavity of an ideal four-level laser system, when nonradiative depopulation is zero, the light output property of the microcavity laser is linearly.
在封闭腔，对理想的四能级激光系统，无辐射衰减速率为零时微腔激光器的光输出特性是线性的。
Using our hierarchy, we can easily imagine a four-level process configuration for a large organization, as shown in Figure 2. Each layer contributes to the process above it.
用我们的层次，我能很容易就能够想象一个大的组织的四层过程结构，如图2所示。每一个层次会对它上面的过程有所帮助。
The paper introduces the Germanic satellite positioning and navigation service. According to its precision, respond time, its purpose, it was divided into four-level service.
本文介绍德国的卫星定位与导航服务，及其按精度、时间响应和目的所分成的四个级别的服务。
The optimum system architectures is the four-level computer network that centralizes the process of real-time tracing information in the computer centers at the railway bureau.
最佳的系统结构是以铁路局计算中心为实时追踪处理点的四级计算机网络。
And we can find the deep-seated reasons of Ling Shan's success by analyzing with the four-level model of cultural tourism products, which proves that the evaluation system is reasonable.
运用文化旅游产品的四层次评价模型对灵山文化旅游产品进行剖析可以发现其成功的深层次理由，同时也证明了模型的合理性。
Phase conjugation of backward-and forward-wave produced by degenerate four-wave mixing using a nearly resonantly enhanced nonlinearity in four-level organic dye solutions was investigated.
研究了近共振增强的四能级系统有机染料溶液中简并的四波混频后向反射波及前向波的位相复共轭特性。
Compared with three-level atomic system, the atomic coherence effects in four-level can lead to EIT and EIA, which depend on the intensity of control light and the relaxation of the fourth level.
与三能级原子系统相比，四能级原子相干效应即可导致电磁感应透明的产生，也可产生电磁感应吸收现象，取决于控制光的强度和第四个能级衰变率的大小。
In fact, real benefit levels were lower in the 1970s than they were in the 1940s, and in most states the maximum benefit was below the poverty level for a family of four.
事实上，20世纪70年代的实际福利水平比20世纪40年代的要低，而且在大多数州，四口之家的最高福利都低于贫困线。
Conversely, chemical engineers straight out of school can easily make almost four times the wages of an entry-level high-school graduate.
相反，刚从大学毕业的化学工程师的工资几乎是入门级高中毕业生的四倍。
According to a study by Australian National University, Australian children and Chinese children have the same level of eyesight before they start school, but once they enter primary school, Chinese children only spend about an hour a day outside, while Australian children spend three to four hours each day in the sunshine.
澳大利亚国立大学的一项研究显示，澳大利亚的孩子和中国的孩子在入学前的视力水平相同。但是一旦他们进入小学，中国的孩子每天只会在户外度过一个小时，而澳大利亚的孩子每天在阳光下待三到四个小时。
There are four units in one level.
每层有四套房子。
There are four units in one level.
每层有四套房子。
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