原理

The Fermat"s principle, Fresnel"s coefficients, Goos-Hanchen effect and Brewster angle at an interface between a PIM and a NIM were studied respectively. When the NIMs are introduced, the two traditional descriptions of Fermats principle are not consistent with each other and the least time principle do not hold true anymore.

随着负折射率介质的引入通过对费马原理的两种传统描述形式的研究可以发现，正—负折射率介质平界面处的最短时间原理已不成立，并进一步验证了使用光程表达的费马原理才是严格的正确的理论。

The uncertainty principle of signal is proved according to the uncertainty principle of quantum mechanics, and is further interpreted by quantum mechanics. The signal can be considered as a kind of the quasi quantum system with wave-particle dualism. Because of the wave-particle dualism of the signal, time and frequency can not be measured at the same time.

根据量子力学的测不准原理，采用力学量算符的方法得到了信号在时频分析时的测不准原理，并对该原理进行量子诠释，认为信号在某种意义下可以看作是一个存在波粒二重性的类量子系统，正是由于信号的波粒二重性导致无法同时准确地测定信号的时间和频率。

The main work of this paper: Firstly, Basing on the summarization and analysis of the walking mechanism, Parallel drive five-bar mechanism is applied for walking mechanism. And then the characteristic of the trail and positive kinematics as well as reverse kinematics are discussed. Secondly, the model of walking mechanism is established according to Parallel drive five-bar mechanism, and then a figure planning is designed for the foot-end trail. The characteristics of the parallel drive are emphasized to research in this paragraph by the method of insert value. At last, the simulation is performed in the ADAMS to compare the real result to the theoretical value. Thirdly, a sealed structure of a Quadruped Walking Robot is designed and established. The whole control system, including motor, sensor and control circuit, is sealed in the robot. Walking is derived in the way of the shaft driving and the dynamic torque sensor is used to the surrounding conditions of the robot's foot-end to be the foundation of the robot's control. At last, the applying principle of the dynamic torque sensor is researched in detail basing on the traditional sensor of the walking robot. Moreover, the principle is divided into several sorts to discuss. Finally, simulation and verification of the monitor principle are come through in the Mechanism of the Pro/Engineer.

论文的主要工作有：在对传统步行机构总结分析的基础上，提出将平面并联五杆机构应用于四足步行机器人的腿部结构，并对其轨迹特性、正运动学、逆运动学特性做了详细计算分析；依据平面并联五杆机构的模型，建立机器人步行机构的实体模型，对其足端的轨迹做了图谱规划，并利用插值法对并联驱动端的特性曲线作了研究，并在ADAMS中进行仿真，将结果与理论值相比较；然后设计了一套四足步行机器人密封装配结构设计方案，建立四足步行机器人单足结构、驱动以及传感器监测的三维实体模型，将机器人的整个控制系统，密封装配在步行机器人的机体中，通过轴传动来驱动步行机构实现步行，采用动态扭矩传感器监测步行机构的驱动关节受到的扭矩变化，从而获得四足步行机器人足端的周围情况，为步行机器人的控制方案奠定了基础；论文的最后在分析步行机器人传统控制传感器的基础上，详细分析了动态扭矩传感器的监测原理，并分几种情况分别分析了其监测原理，并在Pro/E的Mechanism模块中实现了监测原理的仿真与验证，最后给出了传感器监测信息与系统判断之间的关系。

Principle of non-communication complete transmission line UHS protection is proposed according to the effect of line trap and transmission line frequency dependant property on travelling wave.

2在行波原理方面，考虑行波产生的机理特别是线路阻波器、输电线路频率相关特性等的影响，利用行波波头的故障特征，提出了新的单端行波保护原理——无通信全线速动行波保护原理。

On the basis of auto collimation principle, a new auto collimation non - touch method was put forward which could measure vehicle platform distortion.

以自准直原理为基础，提出了测量车载平台的变形的激光自准直非接触测量方法，分析了测量系统的工作原理，并根据该原理设计了一套非接触测量系统，采用该系统测量车载平台的变形，利用视频判读系统对CCD图像进行处理和判读，得出的脱靶量数据，进行计算得出车载平台变形量。

The theoretical background of equivalence principle is briefly given,and the experimental tests of the equivalence principle is discussed in detail,via free-fall method and torsion balance .

本文简要阐述等效原理的研究背景，通过对自由落体法和扭秤法检验等效原理的详细介绍来具体讨论等效原理的实验检验。

Tension Control of the book's introduction, from the tension control Uncoiler principle, characteristics, classification, function and implementation are described; vector transformation from the basic principles of control, inverter control technology boards T400 model and outlines the aspects of how to control the tension the problem; In addition to the tension control roller load balancing and analysis were summarized, the principle of load balancing, sorting and implementation.

有关开卷机张力控制的介绍，从开卷机张力控制的原理、特点、分类、作用及实现进行了阐述；从矢量变换控制的基本原理、变频器的控制模式及T400工艺板方面概括了张力如何控制的问题；另外对张力辊的负荷平衡控制进行了总结和分析，有关负荷平衡的原理、分类和实现。

Mechanical principle and design tenet of sandwich Beams for Buffer and damping is discussed by use of analyzing stresses, strain, deformation, strength and energy storing in a cantilever sandwich beam.

通过分析悬臂夹芯梁在冲击力P作用下的应力、变形、强度和储能原理，讨论了夹芯梁用于缓冲和减振的力学原理和设计原则；给出了夹芯梁用于缓冲减振时，蒙皮与芯层尺寸的选择和材料特性选择的原理和方法。

Then it presents the basic concepts and the principles of GPS and the working principles of integrated container rubber-tired cranes. Based on the working principles of GPS.a technical plan of applying GPS into automatic control and the rubber-tired cranes is made up to study the practical application of GPS as well as the allocation of the related products.

接着，介绍了GPS的基本概念、原理和集装箱轮胎吊的工作原理，根据GPS系统工作原理设计了GPS系统在自动控制和轮胎吊上的应用技术方案；根据技术方案，研究GPS在轮胎吊上的实际应用及产品的配置。

In the wireless remote control hoist crane electric control electric circuit, the commonly used electric appliance obtains the widespread application; Next, but also has used the self-lock mechanism, the interlock principle, the sequential control principle and so on, these have laid the foundation for the bridge-type hoist crane's wireless remote control re-equipping.

在无线遥控起重机电气控制电路中，常用电器得到广泛应用；其次，还利用了自锁原理，互锁原理，顺序控制原理等，这些都为桥式起重机的无线遥控改装奠定了基础。小弟英语不怎么的，求大虾帮忙，千万别用翻译软件翻译好的，我还追加积分

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了