24,644 research outputs found
Robust-MBFD: A Robust Deep Learning System for Motor Bearing Faults Detection Using Multiple Deep Learning Training Strategies and A Novel Double Loss Function
This paper presents a comprehensive analysis of motor bearing fault detection
(MBFD), which involves the task of identifying faults in a motor bearing based
on its vibration. To this end, we first propose and evaluate various machine
learning based systems for the MBFD task. Furthermore, we propose three deep
learning based systems for the MBFD task, each of which explores one of the
following training strategies: supervised learning, semi-supervised learning,
and unsupervised learning. The proposed machine learning based systems and deep
learning based systems are evaluated, compared, and then they are used to
identify the best model for the MBFD task. We conducted extensive experiments
on various benchmark datasets of motor bearing faults, including those from the
American Society for Mechanical Failure Prevention Technology (MFPT), Case
Western Reserve University Bearing Center (CWRU), and the Condition Monitoring
of Bearing Damage in Electromechanical Drive Systems from Paderborn University
(PU). The experimental results on different datasets highlight two main
contributions of this study. First, we prove that deep learning based systems
are more effective than machine learning based systems for the MBFD task.
Second, we achieve a robust and general deep learning based system with a novel
loss function for the MBFD task on several benchmark datasets, demonstrating
its potential for real-life MBFD applications
Optimal Transport for Domain Adaptation
Domain adaptation from one data space (or domain) to another is one of the
most challenging tasks of modern data analytics. If the adaptation is done
correctly, models built on a specific data space become more robust when
confronted to data depicting the same semantic concepts (the classes), but
observed by another observation system with its own specificities. Among the
many strategies proposed to adapt a domain to another, finding a common
representation has shown excellent properties: by finding a common
representation for both domains, a single classifier can be effective in both
and use labelled samples from the source domain to predict the unlabelled
samples of the target domain. In this paper, we propose a regularized
unsupervised optimal transportation model to perform the alignment of the
representations in the source and target domains. We learn a transportation
plan matching both PDFs, which constrains labelled samples in the source domain
to remain close during transport. This way, we exploit at the same time the few
labeled information in the source and the unlabelled distributions observed in
both domains. Experiments in toy and challenging real visual adaptation
examples show the interest of the method, that consistently outperforms state
of the art approaches
SAFS: A Deep Feature Selection Approach for Precision Medicine
In this paper, we propose a new deep feature selection method based on deep
architecture. Our method uses stacked auto-encoders for feature representation
in higher-level abstraction. We developed and applied a novel feature learning
approach to a specific precision medicine problem, which focuses on assessing
and prioritizing risk factors for hypertension (HTN) in a vulnerable
demographic subgroup (African-American). Our approach is to use deep learning
to identify significant risk factors affecting left ventricular mass indexed to
body surface area (LVMI) as an indicator of heart damage risk. The results show
that our feature learning and representation approach leads to better results
in comparison with others
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