1Study on Chemical Cross-linking Modification of Hyaluronan and the Biocompatibility of its DerivativesHU Guo-ying, LIU Xin, GU Han-qing139-1502Implementation of a Multi-sampling-frequency System for RR-interval Timing and Blood Pressure DetectionXU Liang, FAN Bao-lin, WANG Xing, PENG Yi151-1583Pattern Recognition of EEG Signals and Applications in RoboticsZHANG Xiao-dong, CHENG Zhi-qiang, LI De-jun159-1704A Study of BCI Signal Pattern Recognition by Using Quasi-Newton-SVM MethodYANG Chang-chun, MA Zheng-hua, SUN Yu-qiang, ZOU Ling171-1775Study on Singularity of Chaotic Signal Based on Wavelet TransformYOU Rong-yi178-184