Results 41 to 50 of about 4,524,731 (322)

Crystal structure, electronic, and magnetic properties of the bilayered rhodium oxide Sr3Rh2O7 [PDF]

open access: yes, 2002
The bilayered rhodium oxide Sr3Rh2O7 was synthesized by high-pressure and high-temperature heating techniques. The single-phase polycrystalline sample of Sr3Rh2O7 was characterized by measurements of magnetic susceptibility, electrical resistivity ...
A.P. Mackenzie   +43 more
core   +3 more sources

Adaptive Minimum-Entropy Hybrid Compensation for Compound Faults of Non-Gaussian Stochastic Systems

open access: yesIEEE Access, 2019
This study investigated minimum-entropy hybrid fault-tolerant control (FTC) theory for non-Gaussian stochastic systems with compound faults. After fuzzy linearization for the singular systems, the output probability density function (PDF) is generated by
Kaiyu Hu   +3 more
doaj   +1 more source

A study on the feature separation and extraction of compound faults of bearings based on casing vibration signals

open access: yesJournal of Vibroengineering, 2021
The autocorrelation function is combined with wavelet transform and cyclostationary theory (WT-AF-CT) in place of threshold denoising, and meanwhile the mean power ratio (MPR) is calculated by the proposed method. Furthermore, extracted characteristic as
Qizhi Fang, B. Qiao, Mingyue Yu
semanticscholar   +1 more source

A Systematic Aspect-Oriented Refactoring and Testing Strategy, and its Application to JHotDraw [PDF]

open access: yes, 2005
Aspect oriented programming aims at achieving better modularization for a system's crosscutting concerns in order to improve its key quality attributes, such as evolvability and reusability.
Marin, Marius   +2 more
core   +6 more sources

Application of Deep Neural Network in Gearbox Compound Fault Diagnosis

open access: yesEnergies, 2023
Gearbox fault diagnosis is vital to ensure the efficient operation of rotating machinery, and most gearbox faults in industrial production occur in the form of compound faults. To realize the diagnosis of compound faults in gearboxes at different speeds,
Xiangfeng Zhang   +3 more
doaj   +1 more source

On the Stacking Charge Order in NaV2O5

open access: yes, 2004
We propose a mechanism for the observed stacking charge order in the quarter-filled ladder compound NaV2O5. Via a standard mapping of the charge degrees of freedom onto Ising spins we explain the stacking order as a result of competition between ...
Chitov, G. Y., Gros, C.
core   +1 more source

Compound Fault Diagnosis of a Wind Turbine Gearbox Based on MOMEDA and Parallel Parameter Optimized Resonant Sparse Decomposition

open access: yesSensors, 2022
Wind turbines usually operate in harsh environments. The gearbox, the key component of the transmission chain in wind turbines, can easily be affected by multiple factors during the operation process and develop compound faults. Different types of faults
Yang Feng   +3 more
doaj   +1 more source

Sparsity-Oriented Nonconvex Nonseparable Regularization for Rolling Bearing Compound Fault under Noisy Environment

open access: yesShock and Vibration, 2020
Rolling bearing is widely used in rotating machinery and, at the same time, it is easy to be damaged due to harsh operating environments and conditions. As a result, rolling bearing is critical to the safe operation of the machinery devices.
Xiaocheng Li   +2 more
doaj   +1 more source

Fault Diagnosis of Rotating Machinery Using Denoising-Integrated Sparse Autoencoder Based Health State Classification

open access: yesIEEE Access, 2023
The diagnostic study on single-fault with distinguishing features based on monitoring data analysis is mature and fruitful in recent years. However, the early fault signals collected by practical monitoring systems often possess the following ...
Jing Yang, Guo Xie, Yanxi Yang
doaj   +1 more source

A study on the diagnosis of compound faults in rolling bearings based on ITD-SVD

open access: yes, 2021
Considering the difficulty in the diagnosis of compound faults in rolling bearings, the paper combines Intrinsic Time-scale Decomposition (ITD) and Singular Value Decomposition (SVD) for extracting the characteristics of compound faults from rolling ...
Mingyue Yu   +3 more
semanticscholar   +1 more source

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