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STUDY ON PHASE PROPERTIES OF STRONG GROUND MOTIONS

Jin Xing Liao Zhenpeng(Institute of Engineering Mechanics ,S. S. B. )  
Using the phase spectrum derived from the phase difference spectrum,this paper points out the essential differences 'between the phase spectrum and the main value of phase spectrum ranging from o to-2π,and shows that the concept that phase spectrum is a random variable uniformly distributed in a range from o to-2π is not true in a wide frequency band which engineers are interested in.
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