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Table 2 List of the features engineered from the complex networks in this study

From: CNFE-SE: a novel approach combining complex network-based feature engineering and stacked ensemble to predict the success of intrauterine insemination and ranking the features

j = 1, 2, 3 where j = 1 indicates the index of the complex network (CN) made up of all training instances. J = 2 (or 3) are indices of complex networks consisting of all training instances excluding data records belonging to negative (or positive) class  
F1 = (node degree in CN2 – node degree in CN3) / node degree in CN1 (4)
F2 = (node weighted degree in CN2 – node weighted degree in CN3) / node weighted degree in CN1 (5)
F3 = (node closeness centrality in CN2 – node closeness centrality in CN3) / node closeness centrality in CN1 (6)
F4 = (node Eigen value centrality in CN2 – node Eigen value centrality in CN3) / node Eigen value centrality in CN1 (7)
F5 = (node betweenness centrality in CN2 – node betweenness centrality in CN3) / node betweenness centrality in CN1 (8)
F6 = (node clustering coefficient in CN2 – node clustering coefficient in CN3)/ node clustering coefficient in CN1 (9)
F7 = minimum length of the shortest path from the node in CN2 / minimum length of the shortest path from the node in CN3 (10)
F8 = the number of 2-hop neighbors of the node in CN2 / the number of 2-hop neighbors of the node in CN3 (11)
F9 = node degree in CN2 / node degree in CN3 (12)
F10 = node closeness centrality in CN2 / node closeness centrality in CN3 (13)
F11 = node Eigen value centrality in CN2 / node Eigen value centrality in CN3 (14)
F12 = node betweenness centrality in CN2 / node betweenness centrality in CN3 (15)
F13 = (normalized node degree in CN2—normalized node degree in CN3)/ max (normalized node degree in CN2, normalized node degree in CN3) (16)
F14 = (normalized node closeness in CN2 – normalized node closeness in CN3)/ max (normalized node closeness in CN2, normalized node closeness in CN3) (17)
F15 = (normalized node Eigen value in CN2 – normalized node Eigen value in CN3)/ max (normalized node Eigen value in CN2, normalized node Eigen value in CN3) (18)
F16 = (normalized node betweenness in CN2 – normalized node betweenness in CN3)/ max (normalized node betweenness in CN2, normalized node betweenness in CN3) (19)
F17 = (normalized node clustering coefficient in CN2 – normalized node clustering coefficient in CN3)/ max (normalized node clustering coefficient in CN2, normalized node clustering coefficient in CN3) (20)