8 Papers
2 Citations
Jie Liu is an academic researcher from Shanghai Jiao Tong University. The author has contributed to research in topics: Computer science & Kurtosis. The author has an hindex of 2, co-authored 2 publications.
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Papers
Understanding importance of positive and negative signs of optimized weights used in the sum of weighted normalized Fourier spectrum/envelope spectrum for machine condition monitoring
TL;DR: In this article , the sum of weighted normalized square envelope was proposed as a generalized framework of some well-known sparsity measures including kurtosis, negative entropy, smoothness index, and Gini index.
44
•Proceedings Article
PHD: A Probabilistic Model of Hybrid Deep Collaborative Filtering for Recommender Systems
Jie Liu,Dong Wang,Yue Ding +2 more
- 11 Nov 2017
TL;DR: A probabilistic model that combines a stacked denoising autoencoder and a convolutional neural network together with auxiliary side information to extract users and items’ latent factors, respectively is proposed.
Investigation on optimal discriminant directions of linear discriminant analysis for locating informative frequency bands for machine health monitoring
TL;DR: Linear discriminant analysis (LDA) is a supervised machine learning algorithm for dimensionality reduction and pattern recognition, which aims to simultaneously maximize a separation between different classes and minimize a variance within classes as discussed by the authors .
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Investigations on the sensitivity of sparsity measures to the sparsity of impulsive signals
TL;DR: In this paper , the sensitivity of sparsity measures to the sparsity of impulsive signals is investigated in the domain of machine condition monitoring, and it is shown that the Gini index has the most stable sensitivity to sparsity.
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Vibration Characteristics of Rotor System with Loose Disc Caused by the Insufficient Interference Force
TL;DR: In this article , a dynamic model of the rotor system with loose disc caused by insufficient interference force is proposed based on the contact model of disc-shaft system with the microscopic surface topography, the vibration characteristics of the system are analyzed and discussed by the number simulation, and verified by the experiment.