Mexican Hat Wavelet Kernel ELM for Multiclass Classification
This work addresses multiclass classification problems in machine learning, but it is incremental as it modifies an existing method (KELM) with a new kernel.
The paper tackles low test accuracy in multiclass classification with kernel extreme learning machines (KELM) by proposing a Mexican Hat wavelet KELM classifier, which improves training accuracy and reduces training time, as shown by experimental results on various datasets.
Kernel extreme learning machine (KELM) is a novel feedforward neural network, which is widely used in classification problems. To some extent, it solves the existing problems of the invalid nodes and the large computational complexity in ELM. However, the traditional KELM classifier usually has a low test accuracy when it faces multiclass classification problems. In order to solve the above problem, a new classifier, Mexican Hat wavelet KELM classifier, is proposed in this paper. The proposed classifier successfully improves the training accuracy and reduces the training time in the multiclass classification problems. Moreover, the validity of the Mexican Hat wavelet as a kernel function of ELM is rigorously proved. Experimental results on different data sets show that the performance of the proposed classifier is significantly superior to the compared classifiers.