A voxel image‐based pulmonary airflow simulation method with an automatic detection algorithm for airway outlets

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Fei Jiang ◽  
Tsunahiko Hirano ◽  
Junji Ohgi ◽  
Xian Chen
Keyword(s):  
Automatic Detection ◽  
Simulation Method ◽  
Detection Algorithm ◽  
Automatic Detection Algorithm ◽  
Airflow Simulation

Automatic Detection of Corrugation: Preliminary Results in the Dutch Network Using Axle Box Acceleration Measurements

2015 ◽  
Author(s):  
Shaoguang Li ◽  
Alfredo Núñez ◽  
Zili Li ◽  
Rolf Dollevoet
Keyword(s):  
Automatic Detection ◽  
Detection Algorithm ◽  
System Response ◽  
Growth Mechanisms ◽  
Preliminary Results ◽  
Rail Network ◽  
Track System ◽  
Good Potential ◽  
Automatic Detection Algorithm ◽  
Wheel Track

Short pitch corrugation is commonly seen in all kinds of tracks. There is not yet a conclusive explanation in the literature for its initiation and growth mechanisms. In this paper, we use an axle box acceleration (ABA) measurement system to detect corrugation. ABA can be easily implemented in operational trains, providing direct and reliable health monitoring of the track. We have extended a detection algorithm for rail surface local short wavelength defects to also detect short pitch corrugation, which is a continuous defect over the track. A 3D transient FE wheel-track model is employed to find theoretical signature tunes of the wheel-track system response when passing over a short pitch corrugation. Numerical simulations agree with ABA measurement obtained in the Dutch rail network. Based on the signature tune identified, an automatic detection algorithm is developed. Preliminary results with the algorithm are discussed. Field observations show a good potential of the detection algorithm to be used by inframanagers, to detect and monitor corrugation.

scholarly journals EP-1592: Automatic detection algorithm for MLC position using a single EPID image in a daily QA program

2016 ◽  
Vol 119 ◽  
pp. S740
Author(s):  
P. Colleoni ◽  
A. Gambirasio ◽  
C. Bianchi ◽  
M. Fortunato ◽  
S. Andreoli
Keyword(s):  
Automatic Detection ◽  
Detection Algorithm ◽  
Automatic Detection Algorithm
Sign in / Sign up

Export Citation Format

Share Document