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DTRC—92/012 
Approved for public release; distribution is unlimited. 
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NAME OF PERFORMING ORGANIZATION 6b. OFFICE SYMBOL NAME OF MONITORING ORGANIZATION 
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David Taylor Research Center Code 1540 
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Bethesda, Maryland 20084-5000 
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TITLE (include Security Classification) 
A Review of Statistical Studies of Seakeeping Qualities 
12. PERSONAL AUTHOR(S) 
Yamanouchi, Yasufumi 
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Final FROM TO 1992, December 437 
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In Part I, the general procedures of the conventional method of correlation or spectrum analysis of a random pro- 
cess (nonparametric method) are reviewed, stressing the statistical reliability of the results. A few suggestions for im- 
proving coherencies are given. In Part II, the characteristics of AR, MA, and ARMA models are discussed. The model— 
fitting technique supported by AIC criteria is introduced, with the examples of application to seakeeping data. In Part 
II, the statistical treatments of nonlinearities in random process analysis are summarized and reviewed. Conclusions 
are given, and future work is proposed. 
M 
unig 
0 030% 0047258 
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Justin H. McCarthy (301) 227-1609 Code 1540 
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