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Efficient extreme learning machine via very sparse random projection
Chen, Chuangquan; Vong, Chi-Man; Wong, Chi-Man; Wang, Weiru; Wong, Pak-Kin
Source PublicationSOFT COMPUTING

Extreme learning machine (ELM) is a kind of random projection-based neural networks, whose advantages are fast training speed and high generalization. However, three issues can be improved in ELM: (1) the calculation of output weights takes time (with N training samples and L hidden nodes), which is relatively slow to train a model for large N and L; (2) the manual tuning of L is tedious, exhaustive and time-consuming; (3) the redundant or irrelevant information in the hidden layer may cause overfitting and may hinder high generalization. Inspired from compressive sensing theory, we propose an efficient ELM via very sparse random projection (VSRP) called VSRP-ELM for training with large N and L. The proposed VSRP-ELM adds a novel compression layer between the hidden layer and output layer, which compresses the dimension of the hidden layer from to under projection with random sparse-Bernoulli matrix. The advantages of VSRP-ELM are (1) faster training time is obtained for large L; (2) the tuning time of L can be significantly reduced by initializing a large L, and then shrunk to k using just a few trials, while maintaining a comparable result of the original model accuracy; (3) higher generalization may be benefited from the cleaning of redundant or irrelevant information through VSRP. From the experimental results, the proposed VSRP-ELM can speed ELM up to 7 times, while the accuracy can be improved up to 6%.

KeywordExtreme Learning Machine (Elm) Sparse-bernoulli Matrix Very Sparse Random Projection Dimension Reduction Compression Layer
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Indexed BySCI
WOS Research AreaComputer Science
WOS SubjectComputer Science, Artificial Intelligence ; Computer Science, Interdisciplinary Applications
WOS IDWOS:000431669200009
The Source to ArticleWOS
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Affiliation1.Department of Computer of Information Science,University of Macau,Taipa,China
2.Department of Electromechanical Engineering,University of Macau,Taipa,China
Recommended Citation
GB/T 7714
Chen, Chuangquan,Vong, Chi-Man,Wong, Chi-Man,et al. Efficient extreme learning machine via very sparse random projection[J]. SOFT COMPUTING,2018,22(11):3563-3574.
APA Chen, Chuangquan,Vong, Chi-Man,Wong, Chi-Man,Wang, Weiru,&Wong, Pak-Kin.(2018).Efficient extreme learning machine via very sparse random projection.SOFT COMPUTING,22(11),3563-3574.
MLA Chen, Chuangquan,et al."Efficient extreme learning machine via very sparse random projection".SOFT COMPUTING 22.11(2018):3563-3574.
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