Geochemical characterization of an abandoned mine site: A combined positive matrix factorization and GIS approach compared with principal component analysis

2012 ◽  
Vol 118 ◽  
pp. 30-37 ◽  
Author(s):  
Sara Comero ◽  
Diego Servida ◽  
Luisa De Capitani ◽  
Bernd Manfred Gawlik
Keyword(s):  
Principal Component Analysis ◽  
Matrix Factorization ◽  
Principal Component ◽  
Component Analysis ◽  
Abandoned Mine ◽  
Positive Matrix ◽  
Mine Site ◽  
Geochemical Characterization ◽  
Abandoned Mine Site

Characterization of fretting wear experiments on spline couplings by principal component analysis

2016 ◽  
Vol 231 (7) ◽  
pp. 860-868 ◽  
Author(s):  
Waqar Qureshi ◽  
Francesca Cura ◽  
Andrea Mura
Keyword(s):  
Experimental Data ◽  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Fretting Wear ◽  
Aircraft Industry ◽  
Surface Movement ◽  
Noisy Measurements ◽  
Quasi Static Process

Fretting wear is a quasi-static process in which repeated relative surface movement of components results in wear and fatigue. Fretting wear is quite significant in the case of spline couplings which are frequently used in the aircraft industry to transfer torque and power. Fretting wear depends on materials, pressure distribution, torque, rotational speeds, lubrication, surface finish, misalignment between spline shafts, etc. The presence of so many factors makes it difficult to conduct experiments for better models of fretting wear and it is the case whenever a mathematical model is sought from experimental data which is prone to noisy measurements, outliers and redundant variables. This work develops a principal component analysis based method, using a criterion which is insensitive to outliers, to realize a better design and interpret experiments on fretting wear. The proposed method can be extended to other cases too.

scholarly journals Seismic characterization of an abandoned mine site

2012 ◽  
Vol 61 (3) ◽  
pp. 611-623 ◽  
Author(s):  
Diego Arosio ◽  
Laura Longoni ◽  
Monica Papini ◽  
Luigi Zanzi
Keyword(s):  
Abandoned Mine ◽  
Mine Site ◽  
Seismic Characterization ◽  
Abandoned Mine Site
Sign in / Sign up

Export Citation Format

Share Document