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    In recent years, the sonic full wave well-logging technique is widely using for solid mine well-logging and engineering prospecting with its maturing both in theory and instrument.

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    Given a certain model of atmosphere, the position of resonant factor of infrasonic waves is figured out, by using the theory of full waves and some certain bound conditions.

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  • 本文首先介绍了四频的相关理论然后又研究了光纤四混频效应变换技术中的应用提高长转换效率的办法。

    This paper discusses the theory of FWM and its applications in all optical wavelength converter. And the improvement of wavelength conversion efficiency.

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  • 本文首先介绍了四频的相关理论然后又研究了光纤四混频效应变换技术中的应用提高长转换效率的办法。

    This paper discusses the theory of FWM and its applications in all optical wavelength converter. And the improvement of wavelength conversion efficiency.

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