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• W2912403940 abstract "Thanks to the improvement of technologies such as Internet of Things, bio-sensing and data mining, smart wearable technologies have recently received increasing attention for teenagers’ sport and health monitoring. Despite the powerful data-acquisition ability of the current wearable products on the market, they still suffer performance deficiency in valuable knowledge extraction due to the lack of accurate computational model and in-depth data analysis. Based on this, this paper proposes a machine learning based physical fitness evaluation model oriented to wearable running monitoring for teenagers, in which a variant of the gradient boosting machine (GBM) combined with advanced feature selection and Bayesian hyper-parameter optimization is employed to build a physical fitness evaluation model. To begin with, we design a special experimental paradigm for data acquisition based on a conventional running activity, in which a group of teenagers’ photoplethysmography (PPG) signals in different testing stages are collected by a set of smartbands developed by ourselves. Next, PPG signals are processed in four steps which match with the four modules in the proposed model including signal preprocessing, physiological data estimation, feature engineering and classification modules. Firstly, the signal preprocessing module aims for suppressing noise and removing baseline drift in PPG signals by using a smoothness prior approach (SPA) and a median filter (MF), respectively. Secondly, the physiological data estimation module achieves conversion from PPG signals to physiological data such as heart rate (HR) and blood oxygen saturation (SpO2). Thirdly, the feature engineering module extracts from the physiological data a group of key features closely related to physical fitness statuses, and then implements a novel advanced feature selection scheme by using Pearson correlation and importance score ranking based sequential forward search (PC-ISR-SFS). Fourthly, the classification module utilizes an extreme gradient boosting (XGBoost) algorithm for classification of each teenager's physical fitness level, in which hyper-parameters are adaptively tuned with Bayesian optimization. Experimental results demonstrate that not only does the proposed model achieve higher evaluation accuracy than the existing reference models, but it also provides a promising solution to future physical fitness evaluation for teenagers through a machine-learning-model based intelligent computing instead of traditional empirical-model based manual calculation." @default.
• W2912403940 created "2019-02-21" @default.
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• W2912403940 date "2019-03-01" @default.
• W2912403940 modified "2023-10-18" @default.
• W2912403940 title "An XGBoost-based physical fitness evaluation model using advanced feature selection and Bayesian hyper-parameter optimization for wearable running monitoring" @default.
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• W2912403940 doi "https://doi.org/10.1016/j.comnet.2019.01.026" @default.
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