查询词典 intensity of electric field

Along with of microprocessor of development, the urgent demand have to match with it mutually of connect the issue that ocular exterior measure the equipments directly, root for a living through applied personnel in technique in science, find out a kind of exits already of but the past was output the equipments by the tiny electric current, electric voltage that people neglect, namely the high man in Rogowski electric current spreads to feel machine with divide to press the machine, its output's is several 100 peaceful electric current s/ V electric voltage can control with tiny model protection directly the equipments pick up a people, satisfying the request that protection control measure, and basic dissolves traditional electromagnetism type the electric current, electric voltage feels with each other saturated weakness in machine.

随着微机的发展，迫切要求有配合它的相互连接的问题，眼球的外部测量设备直接，根为口奔驰，通过应用型人才，在技术科学，找到了一种已经退出的，但过去仅仅是输出设备是由微小的电流，电压，人们忽视，即高文在罗柯夫斯基电流差突然觉得机器与隔膜，迫使机，其输出的是几个100和平电流s音频/视频电电压可控制与微小模型直接保护的设备，接了一个人，满足了要求保护控制措施，并基本溶化传统的电磁式电流，电压觉得与对方饱和疲软机器。

Accident prevention;Anaesthesiology;Ball compression test;Classes of protection;Classification;Classification systems;Clearances;Colour codes;Design;Determinations;Dictionaries;Dimensions;Earth conductors;Earthing;Electric appliances;Electric contact protection;Electric enclosures;Electric mains;Electric power systems;Electric shocks;Electrical accidents;Electrical appliances;Electrical engineering;Electrical equipment;Electrical medical equipment;Electrical protection equipment;Electrical safety;Electrically-operated devices;Electromagnetic compatibility;Electromedicine;Electrostatics;EMC;Enclosures;Environmental conditions;Equipment;Equipment safety;Explosion protection;Fire safety;General conditions;Graphic symbols;Hot-mandrel;Impact testers;Inspection;Instructions for use;Insulating enclosures;Insulations;Leakage paths;Letterings;Lists;Marking;Measurement;Mechanical safety;Medical equipment;Medical radiology;Medical sciences;Medical technology;Occupational safety;Operational instructions;Programmable;Protection against electric shocks;Protection coverings;Qualification tests;Radiation protection;Safety;Safety devices;Safety engineering;Safety regulations;Safety requirements;Specification;Strength of materials;Surveys;Symbols;Temperature;Test atmospheres;Test equipment;Testing;Testing conditions;Testing voltages;Transformers

中文主题词事故预防；麻醉学；球压试验；防护等级；分类；分类系统；间隙；色码；设计；测定；词典；尺寸；接地导线；接地；电器；电接触保护；电气外壳；电源；电力系统；电击；电气事故；电气设备；电气工程；医用电气设备；电气保护设备；电气安全；电驱动装置；电磁兼容性；电医学；静电学；EMC；外壳；环境条件；设备；设备安全；防爆；防火安全；一般条件；图形符号；热卷筒；冲击试验器；检验；使用说明书；绝缘外壳；绝缘件；漏电路径；文字书写；表；作标记；测量；机械安全；医疗设备；医学放射学；医学科学；医疗技术学；职业安全；操作说明书；可编程序的；防电击；保护覆盖层；合格试验；辐射防护；安全；安全装置；安全工程；安全规则；安全要求；规范；材料强度；调查；符号；温度；试验环境；试验设备；试验；试验条件；试验电压；变压器

Electric bicycle and electric motorcycle is different, the electric bike is riding the line device, the electrical power good smaller, when the Su-not more than 15 kmh, the electric motor power the larger motorcycle 500W or greater, about 50 kmh per hour, there is no cycling device can be the road for electric bikes, electric motorcycles can not be listed on the road, and the technology was not, a low safety factor, it is recommended not to buy Electric Motorcycle.

电动自行车和电动摩托车是有区别的，电动自行车是有踏行装置的，电机功率好较小，时素不能超过15公里每小时，电动摩托车电机功率较大500W或更大，时速50公里每小时左右，没有骑行装置，电动自行车可以上路，电动摩托车现在还不能挂牌上路，而且技术不成熟，安全系数低，建议不要买电动摩托车。

Arepa Maker, ELECTRIC HOT PATE, ELECTRIC STOVE, ELECTRIC BURNER, ELECTRIC GRILL, ELECTRIC OVEN, ELECTRIC COOKING PLATE, HOTPLATE AND ELECTRIC OVEN WITH TWO HOT PLATE.

主营：生产及出口家用电炉、家用电灶、家用电热炉、厨用电炉、电烧烤炉、电烤箱、面包机、及。

After this text introduced and will imitate the audio frequency signal processing as numerical signal after red shoot outside, the numerical signal that will receive again solution adjust after the audio frequency power enlarger enlarge restore in order to imitate the speech signal, shot the electric circuit outside analyzed to design the audio frequency signal before collecting the electric circuit, signal placed the big electric circuit, frequency to make the electric circuit, red, red circumscribed to accept the electric circuit,, frequency the solution adjusted the electric circuit and audio frequencies to enlarge the electric circuit etc.

本文介绍了将模拟音频信号处理为数字信号后经红外发射，再将接收到的数字信号解调后经音频功率放大器放大后还原为模拟语音信号，在分析设计了音频信号采集电路、信号前置放大电路、频率调制电路、红外发射电路、红外接收电路、、频率解调电路以及音频放大电路等各组成部分。

The company mainly produces: The multi-purpose electromotive force pot, the electric heating operate the hydraulic engine, the microcomputer intelligence electric cooking pot, the numerical code bao, the Xi Shi electric cooking pot, the black Jin'gang electric cooking pot, the multipurpose electric rice-cooker, the multipurpose electric cooker, the luxurious electricity stew-pot, the electronic electricity hot pot, the electric cup and so on several dozens series varieties, disposes stainless steel three Bao Denei the gallbladder, has the heat absorption quickly, being heated even, the wearability, not easy to distort and so on the merits, the product specification is complete, the variety is diverse, the quality is reliable, is welcome deeply the consumer, product best-selling nation each big, middle city.

潮安粤荣电器不锈钢制品有限公司始建于2000年6月，是一家民营科技企业，座落广东省潮安县彩塘镇南方工业区，地理位置优越，公司厂房面积约8000平方米，技术力量雄厚，拥有先进的生产和检测设备；粤荣公司同时通过ISO9001：2000国际质量管理体系认证；产品通过国家&CCC&强制性安全认证。目前公司主要生产：电热开水机、快速电热水壶、电热杯、微电脑智能电饭煲、数码煲、西施电饭煲、黑金刚电饭煲、多用电饭锅、多用电子锅、豪华电炖锅、等几十个系列品种，配置不锈钢三层包底内胆，具有吸热快、受热均匀、耐磨损、不易变形等优点，产品规格齐全，品种多样，质量可靠，深受消费者欢迎，产品畅销全国各大、中城市。

The diffraction theory of Kirchhoff is applied to the four-pinhole aperture diffraction screens, the intensity, the zero-contour of the real and imaginary parts of complex amplitude and the phase distribution in deep Fresnel diffraction region are simulated, and it is found that the bright spots in interference field show central symmetry distribution. When the observation plane close to the diffraction screen, the zero-value points of light intensity can form line segment, on which the eccentricities of the light intensity isoline are close or equal to 1, the intensity changes very fast on both sides of the zero-line of light intensity.

利用基尔霍夫衍射理论计算了四圆孔径衍射屏在菲涅尔深区形成的的干涉光场的强度、零值线和相位的分布，发现干涉光场亮斑关于中心呈对称分布，在距离衍射屏较近的观察面上，光强值为的零点组成光强零值线段，该线段上光强等值线的离心率都接近或等于1，其两侧的光强值变化非常剧烈。

In the space filled with dielectric, Coulomb's law should be: F = kQ1Q2r2.V in the electric field generated dielectric polarization bound charge and bound charge generated within the medium electric field, and external electric field in the opposite direction, so to diminish the external electric field.

在充满电介质的空间里，库仑定律应为：F＝kQ1Q2r2.V在电场作用下电介质极化产生束缚电荷，束缚电荷在介质内部产生电场，与外电场方向相反，所以使外电场减弱。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

Electromagnetics course mainly including basic phenomena and laws of electro- magnetics, electrostatic field in vacuum, in conductor and in electric medium, electric energy, stabilized current, stabilized magnetic field and its basic laws, electric and magnetic fields caused by a moving chager in lower speed, the transform of electric and magnetic fields between different systems of coordinates, inductive laws, eddy field, self inductance, mutual inductance and transient, molecule current and magnetic substance, ferromagnet, boundary conditions, magnetic circuit theorem, energy of magnetic field and density of magnetic energy, displacement current, Maxwell's equation, electromagnetic wave, Poynting vector.

电磁学课程的主要内容包括：静电的基本现象和基本定律，真空中的静电场，导体和电介质中的静电场，电场的能量与电场能量密度，稳恒电流，稳恒电流磁场的基本定律，运动电荷的电磁场，不同参照系之间电磁场的变换，电磁感应定律，涡旋电场，互感，自感，暂态过程，分子电流与磁介质，铁磁体，边界条件，磁路定理，磁场的能量和磁能密度，位移电流， Maxwell 方程组，电磁波和玻印廷矢量等。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。