Title	A Learning Method based on Hopfield Neural Network and Its application in Point-feature Labeling Placement Problem
Author	Zheng He, Koichi Harada
Citation	Vol. 6  No. 3  pp. 10-16
Keywords	Constraint optimization, Hopfield neural network, Learning method, Point-feature labeling placement

Title	Improving The Optimal Solution Attainment Rate by Multiplexing Method
Author	Yasuki Iizuka
Citation	Vol. 13  No. 5  pp. 1-8
Keywords	Distributed Constraint Optimization Problem, Optimal Solution