Parsimonious Random Vector Functional Link Network for Data Streams
Sprache des Titels:
The majority of the existing work on random vector functional link networks (RVFLNs) is not scalable for data stream analytics because they work under a batch learning sce- nario and lack a self-organizing property. A novel RVLFN, namely the parsimonious ran- dom vector functional link network (pRVFLN), is proposed in this paper. pRVFLN adopts a fully flexible and adaptive working principle where its network structure can be con- figured from scratch and can be automatically generated, pruned and recalled from data streams. pRVFLN is capable of selecting and deselecting input attributes on the fly as well as capable of extracting important training samples for model updates. In addition, pRVFLN introduces a non-parametric type of hidden node which completely reflects the real data distribution and is not constrained by a specific shape of the cluster. All learning proce- dures of pRVFLN follow a strictly single-pass learning mode, which is applicable for online time-critical applications. The advantage of pRVFLN is verified through numerous simu- lations with real-world data streams. It was benchmarked against recently published al- gorithms where it demonstrated comparable and even higher predictive accuracies while imposing the lowest complexities.