The results show that Fourier Series Smoothing method is not only an efficient method, but also is easy to estimate image quality using modulation transfer function.

试验结果表明：付立叶级数滤波法是一种行之有效的方法，并便利于用调制传递函数评价影象质量。

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The article deals with the functions of DC AC series intelligent power inverters, software PWM technology and alternating voltage output modulation technology.

介绍了DC AC系列智能电源逆变器的功能，软件PWM技术及其交流电压输出调制技术。

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Then with the help of the mathematical analysis of the modulation methods in the series resonance circuit and the simulation results, a suited modulation method is chosen.

对串联谐振逆变电路的几种调功方式进行数学分析和仿真研究，比较它们之间的优缺点，结合分析的结果确定调功方式。

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