X Tang, Q Zeng/The Joumal of Systems and Software 85(2012)87-101 !r! Paper Recommendation according to Download History Cption. Download history option findno thermite Option. ata warehouse of cc ree aftermarket edentata warehause tssbnocootthe paper Recommendation according to Comment History Option -Comment history ALRight Reserved Fig 9. Scientific paper recommender system(SPRS). Bl. F: \LAB FORKS\Pajek Network Bodel\dat abase ll en, net(377) Layout Graphonly Frevious Redr a Next anagement comedon cocffoenl uk-stream data data clean gating ght charges namc tue comping light pal ector paty e wnl diastems data nal privacy constant on predicates Fig. 10. The weighted keyword graph of"databases"whose edge weight threshold value is 196 X. Tang, Q. Zeng / The Journal of Systems and Software 85 (2012) 87–101 Fig. 9. Scientific paper recommender system (SPRS). Fig. 10. The weighted keyword graph of “databases” whose edge weight threshold value is 1