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Planetary gearbox is widely used in many fields due to its robustness and high power-weight ratio, but implement fault diagnosis on it is a challenge all the time. This paper proposed a new fault diagnosis method of planetary gearbox based on EMD and EDT. Firstly, the vibration data is decomposed into several IMFs by EMD. Then select sensitive IMFs which contain main fault information depend on the...
Given a family of smooth immersions of closed hypersurfaces in a locally symmetric Riemannian manifold with bounded geometry, moving by mean curvature flow, we show that at the first finite singular time of mean curvature flow, certain subcritical quantities concerning the second fundamental form blow up. This result not only generalizes a result of Le-Sesum and Xu-Ye-Zhao, but also extends the latest...
Seam measuring of complex tight butt joint without misalignment for laser welding is a challenging problem. The allowable seam gap width and misalignment in laser welding process are less than 0.1 mm for thin sheet around 2 mm thickness. Current measuring methods or sensors can not stably and accurately extract 3D seam position and seam gap width, due to narrow seam gap and too little misalignment...
The face recognition methods based on 2D images confront many challenges due to the variational conditions such as lighting, pose, facial expression and occlusion data. In this paper, we propose a new 3D face recognition approach using recent mesh parameterization techniques, Harmonic Mapping and ABF++. Different from existing 3D recognition methods, our approach represents the face surface in both...
In this study we investigate the protective effects of Trichostatin A (TSA) on astrocyte injury after oxygen–glucose deprivation (OGD) and further explore its possible protective mechanisms of inhibiting inflammatory reaction mediated by nuclear factor-κB (NF-κB). In the in vitro model of astrocyte OGD, TSA treatment was used at different doses and time points before deprivation. Astroglial viability...
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