近年来，声波全波列测井在理论和仪器原理上已经成熟，正被广泛应用在固体矿产测井及工程勘查设计中。
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.
对于波在一种给定的大气模式中传播，加上一定的边界条件，用全波解理论，求出了次声波共振因子的位置。
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.
本文首先介绍了四波混频的相关理论，然后又研究了光纤四波混频效应在全光波长变换技术中的应用，和提高波长转换效率的办法。
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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