采用随频率变化的视波速代替随意给定的视波速，并在随机场的模拟中引入相位差谱来考虑地震动的频率含量非平稳性。
In this paper an apparent wave velocity varying with the frequency of earthquake wave was adopted rather than an arbitrary one.
为了克服小波固有的缺陷，本文构造了一种组合小波，并利用它实现了对电力暂态谐波信号含量及频率的准确检测。
To conquer the old wavelet inherent shortcoming, a combine wavelet is designed and used to realize the accurate detection to harmonic contents and frequency of power quality transient signals.
本文中所考虑的因素有沥青含量、应力状态、温度及动力的频率。
These factors considered were asphalt content, confining pressure, temperature and frequency of dynamic force.
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