Multi-granularity optical node is introduced as an effective economic and scalable method to manage a large number of wavelengths in DWDM optical networks . As the key element in optical networks switching architecture is a very important research field .

多粒度光交换节点作为光网络中的重要网元，为使用、管理大量波长的DWDM光网络提供了一种有效、经济且便于升级的方案，因此， 交换结构的 研究显得十分重要。

The minimal switching field is that at which there is only one stable fixed point in the system .

最小的 翻转 磁场出现在当系统 能量 曲面中只有一个稳定的不动点的情形。

Study on the Switching Field Induced Antiferroelectric to Ferroelectric Phase Transition in Nb Modified Pb ( Zr Sn Ti ) O_3

掺铌Pb（Zr，Sn，Ti）O3反铁电-铁电 转换 电场的研究

Through serial communication port PC machine can make the infrared imaging systems to achieve non-uniformity correction bad point correction switching field of view focusing and other operations .

最后设计了红外成像系统与PC机的串口通信，通过串口，PC机可以远距离对红外成像系统进行非均匀性校正、坏点校正、 视场 切换、调焦等操作。

Reconstruction of Switching Arc Temperature Field by Projection for Low Voltage Electrical Apparatus

低压电器 电弧投影温度 场的重建

Using a pulse signal as a control variable and high-speed switching characteristic of field effect transistor the modulating circuit implements pulsed laser diode driver .

调制电路以脉冲信号作为控制量，利用 场效应管的高速 开关特性，实现了对半导体激光器的脉冲驱动。

The technology of power electronic converters is the core of the switching power supply . With the increasing requirements to the performance of the switching power supply from different high-tech field the design of the power electronic converter control system has become a hot issue .

开关电源的核心技术是电力电子变换器，随着各个尖端科技 领域对 开关电源性能要求的提高，电力电子变换器控制系统的设计在控制 领域 内成为一个热点问题。

The polarization switching has been studied as a function of applied electric field and temperature by using KA model . It is found that the switching current increases with the electric field .

应用铁电薄膜极化反转的KA模型，讨论了极化 反转电流随 电场和温度的 变化关系。

We show that there is a critical value for the damping constant above which the minimal switching field is the same as that of the SW-limit for a given magnetic anisotropy .

文中还指出了对于一个给定的各向异性的磁体，阻尼系数存在一个临界值，超过它时，最小 翻转 磁场与SW极限是相同的.这个 方向窗口的宽度与阻尼系数和磁内能有关。

There are many applications of programmable controller ( PC ) in the switching control field of medium and low frequency electrical devices .

可编程控制器在中低频电器 开关控制 领域应用十分广泛。

Antiferroelectric ceramics are selected by the material near the boundary of the antiferroelectric-ferroelectric phase and forward switching field less than 40kV / cm .

反铁电陶瓷选用Pb（Zr，Sn，Ti）O3相图中位于反铁电-铁电相界附近，正向相变 电场小于 40kV/cm的锆锡钛酸铅。

Switching Logic and Rotating Magnetic Field

开关逻辑与旋转 磁场

Some comments on switching surge field test of power transformer

有关变压器 操作波 感应耐压试验若干技术问题的论述

In addition half metals are completely spin polarized tunneling junctions made from such materials would have an extremely large magnetoresistance ( MR ) and significant switching effect at low field .

此外由于半金属是自旋完全极化的，用这种材料制成的隧道结将在低 场具有明显的 开关 转换效应和较大的MR。

Aiming at the distribution of transient electromagnetic field in the cable tunnel uneven mesh FDTD Method is put forward . The switching transient field is systematically analyzed in the soil and in the cable tunnel in substation and distribution rule is achieved .

针对变电站电缆沟内瞬态电磁场分布，提出了非均匀网格FDTD法，获得了变电站土壤中和电缆沟内不同截面上的 开关瞬态 场分布规律。

The Research of Improving Response Switching Time of Color Field Sequential Liquid Crystal Display

提高 场序彩色液晶显示器 响应速度的方法研究

Magnetic flux was larger with no-load switching and it produced several times field current with short time to return to normal .

仿真过程中空载 合闸时磁通较大，产生几倍的 励磁电流并短时间恢复正常，是一种正常工作状态。

The paper introduces the present application status of the high frequency switching power supply in the communication engineering field summarizes the development in converter topology modeling simulation and magnetic integration and describes the deep effect of digital control technique .

介绍了通信用高频 开关电源技术在工程应用 方面的现状，概述了变换器拓扑、建模与仿真和磁集成 方面的发展，阐明了数字化控制技术所产生的深远影响。

The relations of SPWM inverter switching model and motor field and motor field characteristics in this circumstance are re-searched .

本文从变频器电动机组成的系统角度出发，研究逆变器 开关方式与电机 磁场的关系及SPWM调制下电动机磁场的生成特点。

Safety of MRI for both patients and employees is reviewed . The safety concerns and considerations of exposure to static magnetic fields radio frequency fields switching magnetic field gradients acoustic noise and image enhanced contrast agents are described .

对磁共振成像（MRI）的安全性进行了综述，主要涉及五个方面：静 磁场、梯度场、射频场、噪声和造影剂。

All-optical network can alleviate the O / E / O conversion bottleneck by switching and routing in optical field .

全光网络可以在光 上直接进行 交换和路由，突破了传统光网络需要进行光电转换的瓶颈。

Transistor is viewed as a very important amplification and switching device in micro-electric field .

晶体管可以说它是 微电子中非常重要的器件，它最主要的功能是电流放大和 开关 作用。

So people are focusing on how to quicken the magnetization reversal and / or decrease the switching field .

因此，如何减小磁性存储单元的 翻转 场和如何加快颗粒磁化强度的反转时间成为研究者们共同关注的问题。

Experimental results also indicate that the switching time coercive field and fatigue properties are related to the stress .

还发现：应力对薄膜的 开关时间、矫顽 场、疲劳性能等都有影响。

The results can be applied in the design of switching apparatus with permanent magnetic field blowing arc technique .

研究结果可为永 磁体吹弧技术在 开关电器灭弧系统设计中的应用提供依据。

Numerical Method of Switching Transient Electromagnetic Field in Substation

变电站 开关瞬态 电磁场数值计算方法

In this thesis it is initially investigated that the influence of the additive stress and electric fields on domain switching of ferroelectric materials under cycle-electric field .

该文就循环电载下热效应引起的力、电场和约束畴变时产生的附加应力 场对铁电材料 畴 变的影响进行了初步研究。

With the high efficiency low power consumption light weight and the wide voltage range the switching power supply dominates the field of power .

开关电源以其效率高、功耗小、重量轻、稳压范围宽等优点在电源 领域中占据了主导地位。