电磁

The vibrating wire sensors is excited by single-coil structure and the vibration signal will be feedback through the phototube and MCU.This structure not only simplify the hardware circuit,but also solve the problem of electromagnetic interference which generated by the course of frequency's excitation and pick-up,improve the measurement accuracy and stability of frequency.The application of sweeping frequency makes the vibration wire start-up more stable and reliable.

振弦传感器采用单线圈电磁激振方式，应用光电管结合MCU进行振动信号反馈，不但简化了硬件电路，而且解除了激振和拾振中电磁干扰问题，提高了测量的精度和稳定性；激振中采用的扫频技术也使振弦的起振更加稳定可靠。

The Physical Optics method and the Method of Equivalent Currents are discussed starting with the concept of RCS and the basic theory of electromagnetic scattering.

本文从雷达散射截面的概念及基本电磁散射理论入手，讨论了计算RCS的物理光学法和等效电磁流法。

Magnetic Switch 2、Magnetic Contactor 3、Manual Motor Starter 4、Terminal Block 5、Terminal Block 6、Pilot Lamp 7、Push Button 8、Selector Switches...

电磁开关 2、电磁接触器 3、马达启动器 4、日式端子台 5、欧式端子台 6、指示灯。。。

For the analysis of both static and dynamic characteristics, the additional moments, axial/radial coupled stiffness coefficients and the radial/radial coupled stiffness coefficients are taken into account Based on it, the influences of the bearing angle, the ratio of width to diameter, and the ration of magnetic polar angle on the static and dynamic characteristics conical magnetic bearing are analyzed, and the corresponding numerical results are presented.

在圆锥电磁轴承基础解的计算模型中，增加了轴承附加力矩、力矩刚度系数以及轴向/径向、径向/径向耦合刚度系数的计算。在此基础上，本文详细讨论了圆锥电磁轴承锥角、宽径比以及磁极角比对轴承静、动特性的影响，并给出了数值结果。

The second chapter introduces the configuration and features of the Russian dry calibration device POTOK, and illustrates the principle of the electromagnetic fiowmeter dry calibration technology used in POTOK.

论文第二章首先介绍了俄罗斯电磁流量计干标定装置POTOK的组成和特点，接下来重点对POTOK装置干标定电磁流量转换器和传感器的原理和技术进行了剖析。

The fourth chapter introduces the validation test of POTOK. In the chapter, application effectivity of the Russian dry calibration method for electromagnetic fiowmeter is evaluated through experimentation.

论文第四章进行POTOK装置验收试验，对俄罗斯电磁流量计干标定技术在我国电磁流量计产品中的应用效果进行检验，并在试验结束后给出了相应的试验结果。

The research and development of visualization system of electromagnetic environment monitor is very necessary, and it is very important significance. It can assure the quality of communication for avoiding the interface of electromagnetic signal, live up to reasonable layout and distribution for the construct of mobile communication station and radio monitor station, reduce the endangerment electromagnetic radicalization for surrounding environment and body of people.

为了避免电磁信号之间的相互干扰，保证通信的质量；为了对移动通信基站或无线电监测站的建设，做到合理的规划和布局；为了减少电磁辐射对周围环境和人体的危害，研究并开发电磁环境监测可视化系统就显得很有必要，具有十分重要的意义。

Based on the above results, the problems of the electromagnetic interaction between a perfect conducting plate and 1-D/2-D conducting slightly random rough surface and the problems of the electromagnetic interaction between a dielectric spherical particle and dielectric slightly random rough surface are investigated. By using the reciprocity theorem, Small Perturbation Method and Physical Optics approximation, the solution for the composite scattering field from the composite target is derived and evaluated, and the numerical results are discussed and analyzed.

在此基础上，用互易性原理分别研究了一维、二维导体微粗糙面与其上方金属导体平板目标的复合电磁散射及介质粗糙面与其上方球形粒子的复合电磁散射，结合互易性原理和粗糙面散射微扰法及物理光学近似导出了复合散射场的计算公式并进行了数值计算，对计算结果进行了讨论和分析。

At the same time, the kinds of wave-absorbing material and researchful hotspot were introduced.

阐述了研究电磁屏蔽材料和吸波材料的重要性，分析了在不同情况下电磁屏蔽材料和吸波材料的作用机理。

The influence of the photon with non-zero rest mass was calculated on the motion equations of electromagnetic wave.

这些检验大多数是在平直时空下，以重电磁理论为理论基础的，而重电磁理论最直接的结论之一就是重光子在真空中的色散效应[1]。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐