Title	An Improved EM Algorithm for Network Link Delay Distributions Inference
Author	Hongjie Sun, Binxing Fang, Hongli Zhang
Citation	Vol. 6  No. 6  pp. 170-173
Keywords	network tomography, link delay distribution, Expectation-Maximization(EM) algorithm, A* algorithm

Title	User-oriented Operational Interface for Virtual Learning Environment
Author	Tomoko Kojiri, Yasuki Ito, Toyohide Watanabe
Citation	Vol. 6  No. 6  pp. 163-169
Keywords	Human interface, modeling student’s intention, logical window network, automatic movement of windows

Title	Intercarrier Interference Suppression for OFDM Systems Using Hopfield Neural Network
Author	Qingyi Quan, Junggon Kim
Citation	Vol. 6  No. 6  pp. 157-162
Keywords	Intercarrier interference, OFDM, Hopfield network, Neural networks

Title	Research on Modeling the Nonhomogenous Markov Decision Systems with Dynamic Bayesian Network
Author	Guo Junwen, Qin zheng, Heng Xingchen
Citation	Vol. 6  No. 6  pp. 150-156
Keywords	Dynamic Bayesian network, Markov model, hidden variables, Bayesian probability statistical method