On-line crack propagation prognostics using a resample-move particle filter

Author(s):  
Yanwen Wang ◽  
Jian Chen ◽  
Shenfang Yuan
Sensors ◽  
2016 ◽  
Vol 16 (3) ◽  
pp. 320 ◽  
Author(s):  
Jian Chen ◽  
Shenfang Yuan ◽  
Lei Qiu ◽  
Jian Cai ◽  
Weibo Yang

Ultrasonics ◽  
2018 ◽  
Vol 82 ◽  
pp. 134-144 ◽  
Author(s):  
Jian Chen ◽  
Shenfang Yuan ◽  
Lei Qiu ◽  
Hui Wang ◽  
Weibo Yang

2017 ◽  
Vol 26 (8) ◽  
pp. 085016 ◽  
Author(s):  
Shenfang Yuan ◽  
Jian Chen ◽  
Weibo Yang ◽  
Lei Qiu
Keyword(s):  
On Line ◽  

2019 ◽  
Vol 28 (3) ◽  
pp. 035011 ◽  
Author(s):  
Jian Chen ◽  
Shenfang Yuan ◽  
Hui Wang ◽  
Weibo Yang

2011 ◽  
Vol 338 ◽  
pp. 547-552
Author(s):  
He Len Wu ◽  
Zhong Yi Cai ◽  
Ke Qin Xiao

Shaft fatigue crack is one of the most common defects in rotating equipment, due to its extensive operation with continuous heavy loads. Finding an efficient way to evaluate the true stiffness variation due to the crack rotation is the key step to develop both on-line and off-line crack diagnostic techniques. This study analyzed time-variant bending stiffness of elastic shafts with experimentally-induced fatigue, welding and wire cut transverse cracks. It was found that crack gap has a significant effect on the opening and closing behaviour of the transverse crack. As in the case of a cut crack, large crack gap could completely prevent the crack from closing during rotation. A fatigue crack without a clear gap shows a typical opening and closing behavior. Further, it remains fully closed within a small angular range and most of time it is partially closed. It was also observed that both switch and harmonic models cannot describe periodic stiffness variation well enough to represent the actual breathing function of the fatigue crack.


Author(s):  
Norikazu Ikoma ◽  
◽  
Gefan Zhang

Decorations of face such as enlarging eyes, whitening skin, rendering face slim, and so on are commercially successful in amusement arcades especially in Japan for still image and off-line processing. This paper proposes to decorate human face in video on-line and in real-time processing. Face posture estimation using particle filter plays a key role to decorate the face by precisely determining position of the eyes as well as determining regional position of face. Our proposed method conducts two decorations, enlarging eyes and whitening skin, based on the estimation result of face posture. Real-time implementation of the proposed method has been demonstrated for real scenes of indoor situation.


Sign in / Sign up

Export Citation Format

Share Document