four-level

A Research on Neutral-point Potential Balancing Control Strategy for Three-phase Four-wire Tri-level Three-leg APFs

三相四线制三电平三桥臂有源滤波器中点平衡控制策略

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The spontaneous emission of a four-level atom embedded in a one-dimensional photonic crystal is investigated.

本文研究了处于各向同性的一 维 光子晶体中的单个四 能级 原子的自发发射性质.

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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。

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A four-level algorithm to improve the convergence of the three-level costate prediction method

改进三级共态预估法收敛性能的四级算法

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Lamb's quantum theory of lasers is extended to deal with the three-mode laser operation in an in homogeneously broadened solid medium consisting of four-level atoms.

本文把Lamb的激光量子理论推广应用于处理固体非均匀增宽介质中的四能级三模激光运转。

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Look no further than Wall Street, where speculative bets on rising oil prices via futures and options amount to the equivalent of 323 million barrels& four times what Gluskin Sheff economist David Rosenberg calls a normal level.

看看华尔街就知道了，那里通过期货和期权赌油价上涨的投机头寸已达到3.23亿桶当量&是Gluskin Sheff经济学家戴维•罗森博格认为的正常值的4倍。

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using electric dipole moment and the rotating wave approximation and matrix theory, the dispersion and absorption properties of the quasi-lambda four-level system driven by different relative phase are investigated on the condition of the interaction representation.

在相互作用表象下，运用电偶极矩和旋转波近似及其密度矩阵方程理论，探讨了准∧型能级系统中相干光场之间的不同的相对相位对探测光场的色散和吸收的影响。

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The four-level algorithm given in this paper is a hierarchical algorithm which is developed from the three-level costate prediction method of Hassan-Singh for solving large-scale non-linear dynamical system problems.

本文提出的四级算法是一种由Hassan-Singh的三级共态（？）法发展起来的、解大规模非线性动态系统问题的递阶算法。

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THK quantum theory of the four-level three-mode laser with a common upper level

共上能级三模激光的全量子理论

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The wave-function of the system of single-mode field interacting with N-type four-level atom is solved exactly, and the time-evolution of atomic particle's occupancy is analyzed by means of numerical method.

精确求解了单模光场与N型四能级原子相互作用系统的波函数，并采用数值计算方法，分析了原子布居的时间演化特性。

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The empirical analysis implies that compared with joint-equity banks and city-level banks, the "Big Four" stated-owned banks tend to have worse performance. Also, it indicates that foreign investors tend to select banks with better performance prior to acquisition.

实证分析结果表明，相对于股份制银行和城市商业银行，四大国有银行往往绩效较差；对于选择效应，本文研究发现外国投资者倾向于选择参股绩效更好的股份制银行。

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By using a generalized four-level J-C model, the equation of motion of the field density matrix for the three-mode laser operating in the four-level atomic system is obtained.

本文通过使用推广的J&C模型，获得了四能级原子系统中三模激光运转情况下场密度矩阵的运动方程。

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The paper tries to establish a four-level Chinese aspectual system by the microcosmic study of specific problems.

本文的研究思路是通过对具体问题的考察来构建一个四层级的汉语体貌系统。

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Reasons for Supplementing Four-level Nursing System Standard and Its Contents

提出增补《分级护理制度标准》的原因及内容探讨

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Four-level education system of RTVU is the valuable resource of national higher education.

广播电视大学四级办学系统是国家高等教育的宝贵资源。

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A model of the photon avalanche in a four level coupled system is proposed.

提出了四能级耦合系统的光子雪崩上转换模型.

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Here he has attained the third level of right understanding, that is, the Enlightenment, by realizing the Four Noble Truths.

这里，通过实证四圣谛，他到达正见的第三层次，即觉悟。

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The four-level network communication technology reduced reaction time and improved productivity of the system.

如此通过四层网络通讯技术提高了系统反应控制速度,提高了生产效率.

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Our hospital currently has four provincial-level key construction professionals, focus on the professional field grade 6.

我院目前有省级重点建设专业4个, 校级重点专业6个.

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Based on the rate-equation theory of four-level system, the expressions of threshold pump power, output power and slope efficiency are given.

在本章中，我们首先从四能级激光系统空间速率方程理论出发，得到了阈值泵浦功率、输出功率和斜效率的表达式。

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The dynamic characters and output characters of intra-cavity OPG were analyzed theoretically, according to the three-wave coupled equations and acousto-optic Q-switched four-level rate equation.

根据光学参量产生的耦合波方程以及声光Q开关运转的四能级系统速率方程，分析内腔OPG过程的动态特性以及输入输出特性。

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Of existing four-level sports industry There is a weak foundation, ambiguous advantages and low cluster-based development for applying for Zhejiang province-based national sports leisure industry.

浙江省富阳国家级体育休闲基地的申请存在产业底子薄、优势不明显，集群化发展比较弱。

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Using the present numerical method, we also study theoretically the behalf of double switching from normal to anomalous dispersion of N-type four-level atomic system via trichromatic phase manipulation of electromagnetically induced transparency.

本文还应用此方法，在理论上研究了通过三色场相位操纵电磁诱导透明，从而实现N型四能级原子系统的从正常色散到反常色散的双重转换行为。

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Methods: Four level half-quantitative evaluations were to study two group patients with different kinds of prosthesis.

方法: 对1992年10月至1995年5月的我院共39例2组前牙种植患者,采用临床四级评分的 半定量 方法,观察5年后评估两种修复方法的临床效果.

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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。

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