Estimation of wave height return periods using a nonstationary time series modelling

Stefanakos, CN; Monbet, V

dc.contributor.author	Stefanakos, CN	en
dc.contributor.author	Monbet, V	en
dc.date.accessioned	2014-03-01T02:50:22Z
dc.date.available	2014-03-01T02:50:22Z
dc.date.issued	2006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35092
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33751324068&partnerID=40&md5=92efeebe6a8eebe8c2cc11dd89437aec	en
dc.subject.other	Computer simulation	en
dc.subject.other	Numerical methods	en
dc.subject.other	Time measurement	en
dc.subject.other	Time series analysis	en
dc.subject.other	Confidence intervals	en
dc.subject.other	Dependence structure	en
dc.subject.other	Return periods	en
dc.subject.other	Mechanical waves	en
dc.title	Estimation of wave height return periods using a nonstationary time series modelling	en
heal.type	conferenceItem	en
heal.publicationDate	2006	en
heal.abstract	A new method for calculating return periods of various level values from nonstationary time series data is presented. The keyidea of the method is a new definition of the return period, based on the Mean Number of Upcrossings of the level x* (MENU method). The whole procedure is numerically implemented and applied to long-term measured time series of significant wave height. The method is compared with other more classical approaches that take into acount the time dependance for time series of significant wave height. Estimates of the extremal index are given and for each method bootstrap confidence intervals are computed. The predictions obtained by means of MENU method are lower than the traditional predictions. This is in accordance with the results of other methods that take also into account the dependence structure of the examined time series. Copyright © 2006 by ASME.	en
heal.journalName	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE	en
dc.identifier.volume	2006	en