On-line wave prediction

被引:143
|
作者
Agrawal, JD
Deo, MC [1 ]
机构
[1] Indian Inst Technol, Bombay 400076, Maharashtra, India
[2] Cent Water & Power Res Stn, Pune 411024, Maharashtra, India
关键词
on-line prediction; wave analysis; neural networks; time series; wave prediction;
D O I
10.1016/S0951-8339(01)00014-4
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Operational prediction of wave heights is generally made with the help of complex numerical models. This paper presents alternative schemes based on stochastic and neural network approaches. First order auto regressive moving average and auto regressive integrated moving average type of models along with a three-layered feed forward network are considered. The networks are trained using three different algorithms to make sure of the correct training. Predictions over intervals of 3, 6, 12 and 24 h are made at an offshore location in India where 3-hourly wave height data were being observed. Comparison of model predictions with the actual observations showed generally satisfactory performance of the chosen tools. Neural networks made more accurate predictions of wave heights than the time series schemes when shorter intervals of predictions were involved. For long range predictions both the stochastic and neural approaches showed similar performance. Small interval predictions were made more accurately than the large interval ones. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:57 / 74
页数:18
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