查询词典 electromagnetic force

The theory of electromagnetic field and the method of finite elements are used in precise calculation of back electromotive force in the traditional design of brushless DC motor.

采用人工神经元网络理论则可以有效地解决计算的准确性与计算量之间的矛盾。

Based on the electromagnetic induction law, Biot-Savart law and the numerical integration arithmetic, the vector potential of the busbar was calculated and the electromotive force of the planar coil for the single phase and three-phase busbar current was deduced.

根据电磁感应定律和毕奥-萨伐尔定律，运用数值积分算法，求解出汇流排导体矢量磁位，并推导了测量单相和三相汇流排导体电流时直线型线圈的输出表达式。

To be true, as a twenty-five-year old Einstein, he is very talented, he associated photoelectric diode and black body radiation in the research of photoelectric effect, young and capable, very talented; he associated Coriolis force in the inertia with electromagnetic induction issue and curl field issue in light wave interference research, I really admired his association talent from my heart!

诚然，作为25岁的爱因斯坦很有才华，他在光电效应的研究中把光电二极管与黑体辐射联想到一起，年轻有为，很不简单；他在光波干涉研究中就把惯性中的 Coriolis 力与电磁感应和旋度场问题联想到一起，我真心佩服他的联想智慧！

According to Lorentz transformation,the relativistic covariant of electromagnetic field tensor and 4-dimension forces,and the relativistic invariance of electric charge,it can be directly proved that a moving magnetic monopole will be acted- by a magnetic Lorentz force ,and that the magnetic Lorentz force has the same accuracy as the Coulomb low.

概述了磁单极概念的历史发展，从洛伦兹变换出发，利用电磁场张量和四维力的协变性以及电荷相对论不变，直接证明了运动磁单极受磁洛伦兹力，建议了一个磁洛伦兹力的验证方案，并用磁洛伦兹力公式导出狄拉克电荷量子化条件。证明了磁洛伦兹力公式具有与库仑定律相同的精确度

All in all, the opinion of this article is: General Lorentz magnetic force is the physical essence of electromagnetic induction, while Faraday's law is just the phenomenon of electromagnetic induction.

总之，本文的观点是：广义洛伦兹磁力是电磁感应的物理本质，而法拉第定律只是电磁感应的现象。

To prove the validity of the universal method, spring force characteristic of a certain electromagnetic relay was calculated by the method, and the real spring force characteristic was tested with a testing equipment.

采用该方法对某型号电磁继电器的反力特性进行了计算，并以反力特性测试装置对该继电器反力特性进行了测试。

At last, two new execute equipment models without dry friction force are put forward as the discussable research. One is the double-reed electromagnetic execute equipment, and the other is the electromagnetic and permanent magnet suspension one.

最后，作为探讨性研究，本文提出了两种完全避免干摩擦的新型执行装置模型：一种是双层簧片式电磁执行装置，另一种是电磁永磁混合悬浮式三维执行装置。

For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying-thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field,by establishing the equations of motion,the equations of distortion,the equations of Lorentz force,the equations of electronic dynamic mechenical,and adopting iterative method,we gained the nonlinear magneto-elastic calculation method and outcome of current-carrying shell,and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field.

为了获得内边界固定的环形导电薄板在均布力与横向磁场作用下的变形问题的数值解，通过建立运动方程、变形方程、电动力学方程和洛仑兹力方程，运用迭代法得出了载流板壳的非线性磁弹性的计算方法和结果，以及机械场、电磁场对铁质变厚度圆板各力学参量的影响程度。

In addition, if the carriage reciprocates during printing operation, the coil L of the solid semiconductor element crosses inside the magnetic flux due to a plurality of permanent magnets (a movement time electromotive force supply unit) arranged on a carrier path, and so the electromotive force is generated on the coil by electromagnetic induction.

另外，如果在打印期间支架往复运动，通过被布置在运载路径上的许多永久磁铁(运动时间电动力供应单元)产生的磁通量穿入固态半导体元件的线圈L，从而通过电磁感应电动力被产生在线圈上。

Finally, the wave equation of the electromagnetic field of this kind damper isderived from the Maxwells equation. The magnetic flux density at the boundary isassumed to be harmonic, so the analytical result of the wave equation is solved. When therotor rotates, eddy currents flowing inside the conducting material field are caused. Thetangential force acting on the rotor because of the action between eddy currents andmagnetic field is produced. The tangential force causes a retardation torque, which leadsto the increase of power and heating effects.

最后，应用Ahrens的电磁轴承简化模型，从Maxwell方程出发推导了应用于本文所述的被动式电磁阻尼器的波动方程，并用傅立叶级数把矩形磁场展开的谐变磁场作为磁场的边界条件，通过求解波动方程得到磁场的解析解，从而计算了阻尼器对转子的电磁力和由涡流引起的切向力产生的阻尼器附加功耗。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。