Massive missing data reconstruction in ocean buoys with evolutionary product unit neural networks
In this paper we tackle the problem of massive missing data reconstruction in ocean buoys, with a Evolutionary Product Unit Neural Network (EPUNN). When considering a large number of buoys to reconstruct missing data, it is sometimes di cult to nd a common period of completeness (without missing dat...
| Authors: | , , , , |
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| Format: | article |
| Publication Date: | 2016 |
| Country: | España |
| Institution: | Universidad Loyola Andalucía |
| Repository: | Brújula |
| OAI Identifier: | oai:dnet:brújula_____::b2d3716e2c92cbcba76d5006e3ecb336 |
| Online Access: | https://hdl.handle.net/20.500.12412/7182 |
| Access Level: | Open access |
| Keyword: | Significant wave height Missing values reconstruction Product Unit Neural Networks Evolutionary Algorithm |
| Summary: | In this paper we tackle the problem of massive missing data reconstruction in ocean buoys, with a Evolutionary Product Unit Neural Network (EPUNN). When considering a large number of buoys to reconstruct missing data, it is sometimes di cult to nd a common period of completeness (without missing data on it) in the data to form a proper training and test set. In this paper we solve this issue by using partial reconstruction, which are then used as inputs of the EPUNN, with linear models. Missing data reconstruction in several phases or steps is then proposed. In this work we also show the potential of EPUNN to obtain simple, interpretable models in spite of the non-linear characteristic of the network, much simpler than the commonly used sigmoid-based neural systems. In the experimental section of the paper we show the performance of the proposed approach in a real case of massive missing data reconstruction in 6 wave-rider buoys at the Gulf of Alaska. |
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