The principle, feature and adjusting method of four applied electric circuit are introduced by practical questions in the seismological and magnetic observation.

以测震和地磁在工作中遇到的实际问题为例，介绍了四例应用电路的原理、特点和调试方法。

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The system proved its validity of subprograms which include voltage calculation module, rotor magnetic chain observation module and SVPWM output module.

并且进行编译调试，验证了电压计算、转子磁链观测以及SVPWM输出等子程序的正确性。

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The magnetic properties of magnetic material are mainly determined by its domain structure and the way it changes, so the observation of magnetic domain is always a very important subject.

磁性材料的宏观磁性能主要是由磁畴结构及其运动变化方式所决定，因此磁畴图像的观测是一个很重要的研究课题。

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