The Research In GSAAS(Group Study Ask And Answer System)Based On Internet BBS

CAI has been a focus in the area of application of computer since it was born in 50's. It's rapid development actually depends on the changing of education theory and advancing of technique of computer. Today, experts in CAI are keeping their eyes on the Intelligent CAI (ICAI) and Network CAI (NCAI) because Artificial Intelligence (AI) and Network are widely used in application of computer. They accomplish much basic research work, and develop some practical CAI system. However there exist many problems remained in their works that should be solved by workers in CAI step by step. After keeping trace of latest technique of computer and theory of education, indicating the trend of CAI in the future, analyzing faults of current CAI system, introducing Network Group Cooperative Learning (NGCL), we set up idea of designing BBS Group Study Ask Answer System (BBSGSAAS). Then we get across it's procedure and frame, and use structure Pre Link List Word Structure namely PLLWS to store Knowledge Node (KN), because it's time complexity is O (log2n) and it is appropriate to storing data which has network structure. Of course both KN Store and the dictionary of professional words can be stored by PLLWS. We work out the algorithm to produce dynamically KN Store (KNS), and focus on the BBSGSAAS's pre process question module that can figure out nucleus of student's original questions and module of teacher agent can make decision in the light of his rules. Finally we summarize the characters in CAI field and shortcomings of the BBSGSAAS.