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

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.

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.

Three Level, free conversation, all aspects in daily life especially for business purpose, Teaching in English.

囊括三阶段水平, 自由对话, 涉及生活各方面话题,特别是商业对话, 英语教学.

A novel current mode series-resonant ZCS three level half bridge inverter is proposed.

提出了一种新型半桥电流源型串联谐振零电流三电平逆变器.

In this paper, SVPWM pattern and implement method has been addressed for three-level NPC inverter.

论述一种中点箝位式三电平逆变器SVPWM原理及其实现方法.

The industry capital management platform is designed into three-level of internet system so as database structure.

将行业固定资产管理平台设计为3级网络系统和3层数据库结构.

Laser power index in multiphoton processes is discussed in detail for the simple three-level system.

本文详细地讨论了三 能级 系统多光子过程的光强指数.

In this paper coherent excitation of two-photon resonance in three-level systems is discussed.

本文研究了双光子共振相干激发三 能级 系统的问题.

The busbars in an IGCT-based high power three level converter are studied.

母排的分布电感是影响高压大容量变换器中半导体器件可靠运行的重要因素.

The garden was stepped and formed into a three-level area.

花园里装上了阶梯,形成了三层.

The hardware system equivalent to the three-level hospital in land.

硬件设施相当于陆上三甲医院.

The molecule can be simplified as a three level system.

在低能量范围内,该分子可以简化为三能级体系.

In this paper, the two level CMS is adopted for channel compensation of telephone speech recognition.

将二阶CMS方法应用到电话语音识别的通道补偿中,实验表明该方法的性能优于通常的CMS方法.

This paper proposes a two-level service placement strategy based on P 2 P overlay network framework.

针对服务部署策略不完善的问题,提出P2P覆盖网络框架下自上而下的2级服务部署策略.

Base on such research , we present a two-level rate control framework, which is tested with experiments.

在此基础上提出了一种简化的两层结构的速率控制算法, 并通过实验验证了该算法的可行性.

Two-level fusion increased ALL strain in the adjacent motion segments, average, greater than single-level fusion did.

两节段融合提高相邻运动节段前纵韧带应力峰值, 平均要高于 单节 段融合者.

In this paper dipole amplitude-squared squeezing of two two-level atoms with vacuum filed is studied.

研究了两个二 能级 原子与真空辐射场相互作用中原子的偶极平方压缩效应.

The two level atom is regarded as quantum-bit.

本文将两能级原子视为量子位.

RESULT The assessment system consists of two level, weighting targets and grades.

结果建立的评价体系由一级指标、二级指标和权重 、 分值等构成.

Finally, the validity of the two-level method was tested by numerical experimentation.

本文所做的数值试验, 验证了两层加罚有限元的有效性.