Transparency of Deep Neural Networks and Complex Tree Ensembles

Dear Colleagues,

Deep learning is a new branch of machine learning which has been proven to be a powerful feature extraction tool in computer vision. The primary disadvantage of deep learning and complex tree ensembles (CTEs) such as XGBoost is that they have no clear declarative representation of knowledge. In addition, deep learning and CTEs have considerable difficulties in generating the necessary explanation structures, which limits their potential because the ability to provide detailed characterizations of classification strategies would promote their acceptance. However, surprisingly, very little work has been carried out in relation to the transparency of deep learning and CTEs. Bridging this gap could be expected to contribute to the real-world utility of deep learning and CTEs. The transparency of deep neural networks is the first step towards filling this gap. The next step towards utilizing deep neural networks and CTEs is extracting rules from them. Transparency and rule extraction from deep neural networks and CTEs therefore remain areas in need of further innovation.

This Special Issue also focuses on the black box nature of deep neural networks and the transparency, interpretability and explainability of deep neural networks (DNNs) and complex tree ensembles (CTEs) such as gradient boosting decision tree, XGBoost, decision forest, and random forest. 

Prof. Dr. Yoichi Hayashi
Guest Editor

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