Search found 2 matches

by Luosong
Mon Apr 30, 2012 12:02 pm
Forum: Ambient vibration techniques
Topic: Is the definition of SPAC wrong in Aki (1957)?
Replies: 2
Views: 6520

Re: Is the definition of SPAC wrong in Aki (1957)?

I should say what you mentioned above is right, I find a paper which mentioned about this topic. Paper: Victor C, (2010), GJI, "An explicit relationship between time-domain noise correlation and spatial autocorrelation (SPAC) results" In equation (21) of this paper, we can find the relatio...
by Luosong
Sat Apr 14, 2012 8:36 am
Forum: Ambient vibration techniques
Topic: Is the definition of SPAC wrong in Aki (1957)?
Replies: 2
Views: 6520

Is the definition of SPAC wrong in Aki (1957)?

As we know, The autocorrelation function is defined in this way (Aki, 1957), (see attachment - Aki) but I think may defined in this way is wrong, it should be the following expression, (see attachment - Me) where the bar stands for mean with respect to the time variable s. Cho (2008) defined the aut...

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