20-10-2009, 03:32 PM
read this some articles
http://portal.acmcitation.cfm?id=1340197
http://doi.ieeecomputersociety10.1109/TKDE.2007.190690
http://ieeexplore.ieeexpls/abs_all.jsp?arnumber=4358967
http://portal.acmcitation.cfm?id=1340197
http://doi.ieeecomputersociety10.1109/TKDE.2007.190690
http://ieeexplore.ieeexpls/abs_all.jsp?arnumber=4358967