Browsing by Author "Rychlik, I."
Now showing items 1-12 of 12
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Article
Dynamically evolving Gaussian spatial fields
Baxevani, Anastassia; Podgórski, K.; Rychlik, I. (2011)We discuss general non-stationary spatio-temporal surfaces that involve dynamics governed by velocity fields. The approach formalizes and expands previously used models in analysis of satellite data of significant wave ...
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Article
Fatigue life prediction for a vessel sailing the North Atlantic route
Baxevani, Anastassia; Rychlik, I. (2007)A method for calculating the wave load induced fatigue damage accumulated by a vessel sailing along the North Atlantic route (NAr) is presented. This method is based on the Palmgren-Miner additive rule and the rainflow ...
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Conference Object
How fast are the two-dimensional gaussian waves?
Baxevani, Anastassia; Podgórski, K.; Rychlik, I. (2002)For a stationary two-dimensional random field evolving in time, we derive the intensity distributions of appropriately defined velocities of crossing contours. The results are based on a generalization of the Rice formula. ...
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Article
Maxima for Gaussian seas
Baxevani, Anastassia; Rychlik, I. (2006)The probability distribution of the height of global maximum for a Gaussian random field evolving in time is studied. In particular, the effect of spreading is studied and the role of the wave kinematics is discussed. It ...
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Conference Object
Modelling significant wave height in the North Atlantic
Baxevani, Anastassia; Rychlik, I.; Wilson, R. J. (2003)The surface of the ocean, and so such quantities as the significant wave height, can be thought of as a random surface in space which develops over time. In this paper, we explore certain types of random fields (in space ...
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Article
A new method for modelling the space variability of significant wave height
Baxevani, Anastassia; Rychlik, I.; Wilson, R. J. (2005)Significant wave height, Hs, is a measure of the variability of the ocean surface and is defined to be four times the standard deviation of the height of the ocean surface. In this paper, we present a methodology for ...
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Conference Object
Note on the distribution of extreme wave crests
Baxevani, Anastassia; Hagberg, O.; Rychlik, I. (2005)The sea elevation at a fixed point is modelled by means of a second order model, which is a smooth algebraic function of a vector valued Gaussian process. Asymptotic methods, presented first in [1], are used to estimate ...
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Conference Object
Relation between velocities and global maximum for Gaussian seas
Baxevani, Anastassia; Rychlik, I. (2004)We study the probability distribution of the height of global maximum for a Gaussian random field evolving in time. Particularly, we discuss the role of the wave kinematics. It is observed that taking into account time ...
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Conference Object
Spatial models for the variability of the significant wave height on the world oceans
Baxevani, Anastassia; Borgel, C.; Rychlik, I. (2007)Significant wave height (Hs) is a measure of the variability of the ocean surface. Knowledge of the spatial and temporal characteristics of this field are multiple: it is useful to dimension offshore structures, to foresee ...
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Article
Spatial models for variability of significant wave height in world oceans
Baxevani, Anastassia; Borgel, C.; Rychlik, I. (2008)Significant wave height (Hs) is a measure of the variability of the ocean surface. Benefits from knowing the spatial and temporal characteristics of this field are multiple: It is useful to size offshore structures, to ...
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Article
Spatio-temporal statistical modelling of significant wave height
Baxevani, Anastassia; Caires, Sofia; Rychlik, I. (2009)In this paper, we construct a homogeneous spatio-temporal model to describe the variability of significant wave height over small regions of the sea and over short periods of time. Then, the model is extended to a ...
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Article
Velocities for moving random surfaces
Baxevani, Anastassia; Podgórski, K.; Rychlik, I. (2003)For a stationary two-dimensional random field evolving in time, we derive statistical distributions of appropriately defined velocities. The results are based on a generalization of the Rice formula. We discuss importance ...