Journal Article

Comparison and improvement of the predictability and interpretability with ensemble learning models in QSPR applications

Tanaka, Kenichi, Funatsu, Kimito, Chen, Chia-Hsiu, Kotera, Masaaki

2020

Overview

Ensemble learning helps improve machine learning results by combining several models and allows the production of better predictive performance compared to a single model. It also benefits and accelerates the researches in quantitative structure–activity relationship (QSAR) and quantitative structure–property relationship (QSPR). With the growing number of ensemble learning models such as random forest, the effectiveness of QSAR/QSPR will be limited by the machine’s inability to interpret the predictions to researchers. In fact, many implementations of ensemble learning models are able to quantify the overall magnitude of each feature. For example, feature importance allows us to assess the relative importance of features and to interpret the predictions. However, different ensemble learning methods or implementations may lead to different feature selections for interpretation. In this paper, we compared the predictability and interpretability of four typical well-established ensemble learning models (Random forest, extreme randomized trees, adaptive boosting and gradient boosting) for regression and binary classification modeling tasks. Then, the blending methods were built by summarizing four different ensemble learning methods. The blending method led to better performance and a unification interpretation by summarizing individual predictions from different learning models. The important features of two case studies which gave us some valuable information to compound properties were discussed in detail in this report. QSPR modeling with interpretable machine learning techniques can move the chemical design forward to work more efficiently, confirm hypothesis and establish knowledge for better results.

• Publisher: Springer International Publishing,BioMed Central Ltd,Springer Nature B.V,BMC
• Subject: Blending / Case studies / Chemistry / Chemistry and Materials Science / Comparative analysis / Computational Biology/Bioinformatics / Computer Applications in Chemistry / Decision trees / Documentation and Information in Chemistry / Ensemble learning / Fluorescence / Learning algorithms / Liquid crystal / Machine learning / Modelling / Performance prediction / Predictions / QSPR / Quantitative structure–property / Research Article / Retirement benefits / Structure-activity relationships / Teaching methods / Theoretical and Computational Chemistry