%0 Journal Article %A Yang, F. %A Shah, S. L. %A Xiao, D. %T Signed directed graph based modeling and its validation from process knowledge and process data %J International Journal of Applied Mathematics and Computer Science %D 2012 %P 41-53 %V 22 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2012_22_1_a2/ %G en %F IJAMCS_2012_22_1_a2