An Alert Correlation Method Based on Improved Cluster Algorithm - Xi Peng; Yugang Zhang; Shisong Xiao; Zheng Wu; JianQun Cui; Limiao Chen; Debao Xiao (PACIIA 2008, Volume 1, 2008 IEEE Pacific-Asia Workshop on Computational Intelligence and Industrial Application, 19-20 December 2008, Wuhan, China, 2008)