Results 201 to 210 of about 7,327 (245)
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Structure and polytypic faults in Ba4NdMn3O12 compound
Journal of Materials Science, 2008We have studied the structure and polytypic defect formation in the 12R perovskite-type Ba4NdMn3O12 compound. Its structure was characterized using transmission electron microscopy (TEM). Like in the 12R ordered oxides of Ba4CeMn3O12 and Ba4PrMn3O12 (Fuentes et al., J. Solid State Chem.
H. Yang +6 more
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A compound fault diagnosis model for gearboxes using correlation information between single faults
Measurement Science and Technology, 2023Abstract Gearboxes are key components of rotating machinery. Performing intelligent fault diagnosis of gearboxes with condition-based monitoring information helps to make reliable decisions on equipment operation and maintenance. Besides single faults, compound faults also are common failure forms of gearboxes.
Ming Zeng +3 more
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A Novel Compound Neural Network for Fault Diagnosis
2006 2nd IEEE/ASME International Conference on Mechatronics and Embedded Systems and Applications, 2006Independent Component Analysis (ICA) is a powerful tool for redundancy reduction and nongaussian data analysis. And, Artificial Neural Network (ANN), especially the Self-Organizing Map (SOM) based on unsupervised learning is a kind of excellent method for pattern clustering and recognition. By combining ICA with ANN, we proposed a novel compound neural
Jiao Weidong, Yang Shixi, Yan Gongbiao
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Multiple Enhanced Sparse Decomposition for Gearbox Compound Fault Diagnosis
IEEE Transactions on Instrumentation and Measurement, 2020The vibration monitoring of gearboxes is an effective means of ensuring the long-term safe operation of rotating machinery. A gearbox may have more than one fault in actual applications. Therefore, gearbox compound fault diagnosis should be investigated.
Ning Li 0020 +4 more
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Imaging of polytypes and stacking faults in tetrahedral compounds
Acta Crystallographica Section A Foundations of Crystallography, 1983The resolution attained with a JEOL 200CX electron microscope in top-entry configuration has allowed the direct elucidation of the structure of tetrahedrally bonded compounds. Computer simulation methods were used to calculate through-focus series of images at a range of thicknesses and the conditions for which structural features are interpretable on ...
A. F. Moodie, H. J. Whitfield
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Stacking-fault energy of II–VI compounds
Philosophical Magazine A, 1985Abstract Stacking-fault energies on the {111} plane in ZnTe (zinc blende structure) and on the (0001) plane in ZnO (wurtzite structure) have been estimated to be 16 ± 4 and greater than 43 mJ m−2, respectively, by weak-beam electron microscopy of dislocations. The stacking-fault energies of the above crystals and previously obtained ones of other II-VI
S. Takeuchi +3 more
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Planar faults in Aurivillius compounds: An X-ray diffraction study
Philosophical Magazine A, 2002Abstract Layered bismuth-containing perovskites are known to be subject to complex structural imperfections such as planar faults. A careful analysis of X-ray powder diffraction lines of the Aurivillius compound SrBi2Nb2O9 shows that stacking faults are located along the c axis and (hk0) reflections are thus unaffected by faulting.
A. Boulle +4 more
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Stacking fault energy and ionicity of cubic III–V compounds
Physica Status Solidi (a), 1978Using weak beam electron microscopy the stacking fault energy (SFE) of III-V compounds is determined by measuring the dissociation width of edge dislocations. The SFE corrected for the lattice parameters is given in meV/atom for GaAs, GaP, GaSb, InAs, InP, and InSb. As expected there is a strong correlation of the SFE with the ionicity of the bond. The
H . Gottschalk, G. Patzeb, H. Alexander
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Compound fault prediction of rolling bearing using multimedia data
Multimedia Tools and Applications, 2017Catastrophic failure of mechanical systems due to faults occurring on rolling bearing is still a great challenge. These faults, which are of multiple type, are compounded in nature. Vibration analysis of multimedia signals is one of the most effective techniques for the health monitoring of these bearings.
Sandip Kumar Singh +2 more
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Regulators faulted for inadequate compounding pharmacy oversight
American Journal of Health-System Pharmacy, 2013D uring hearings in November, Congress faulted lapses in state and federal oversight of pharmacy compounding that might have contributed to the meningitis outbreak associated with allegedly tainted drugs produced by the New England Compounding Center (NECC) of Framingham, Massachusetts ...
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