R. Salas, C. Saavedra , H. Allende, C. Moraga PRL, 2011 Presented by Hung-Yi Cai 2011/5/25
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Transcript of R. Salas, C. Saavedra , H. Allende, C. Moraga PRL, 2011 Presented by Hung-Yi Cai 2011/5/25
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Intelligent Database Systems Lab
國立雲林科技大學National Yunlin University of Science and Technology
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Machine fusion to enhance the topology preservation of vector quantization artificial neural networks
R. Salas, C. Saavedra, H. Allende, C. MoragaPRL, 2011
Presented by Hung-Yi Cai2011/5/25
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Intelligent Database Systems Lab
N.Y.U.S.T.
I. M.
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Outlines· Motivation· Objectives· Methodology· Experiments· Conclusions· Comments
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Intelligent Database Systems Lab
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Motivation
· The objective of VQ is to preserve the topological relationships existing in a data set and to project the data to a lattice of lower dimensions.
· It’s difficult to properly specify the structure of the lattice that best preserves the topology of the data.
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Intelligent Database Systems Lab
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Objectives
· To propose a merging algorithms for machine-fusion, boosting-fusion-based and hybrid-fusion ensembles of SOM, NG and GSOM networks.
BoostingBagging
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Intelligent Database Systems Lab
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I. M.Methodology Machine fusion method for the ensemble of VQ-ANN
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Intelligent Database Systems Lab
N.Y.U.S.T.
I. M.Methodology Machine fusion method for the ensemble of VQ-ANN
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Intelligent Database Systems Lab
N.Y.U.S.T.
I. M.Methodology Boosting machine fusion method
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Intelligent Database Systems Lab
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I. M.Experiments· Synthetic Data
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Intelligent Database Systems Lab
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I. M.Experiments· Real Data
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Intelligent Database Systems Lab
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Conclusions· The main goal of this paper is to improve the
topology preservation by combining the output of several VQ-ANN.
· The proposed ensemble schemes were able to improve the quality of topological representation compared to their respective base single networks.
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Intelligent Database Systems Lab
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Comments
· Advantages─ Improving the VQ in the ANN.
· Drawbacks─ The methods don’t consider the outliers.
· Applications─ Vector Quantization