Abstract: Argumentation model is the theoretical basis to establish group argumentation environment. Based on Issue-Based Information System (IBIS) model and Toulmin' argument schema, a group argumentation model was proposed, which was able to evaluate the argumentative utterance. With this model, the group argumentative information could be structured as a graph which consisted of utterance nodes and semantic links. A method of evaluating utterance nodes based on Language Weighted Aggregation (LWA) operator and node reduction was proposed. A group argumentation on the issue of system architecture design was illustrated as an example to show the usability and effectiveness of the proposed model.

Key words: argumentation model, acceptability degree of utterance node, node reduction, Language Weighted Aggregation (LWA) operator

摘要： 研讨模型是建立群体研讨环境的理论基础。以基于问题的信息系统(IBIS)模型和Toulmin辩论模型为基础，建立了一种可对研讨发言进行评价的群体研讨模型。该模型将群体研讨发言信息组织成由发言节点和语义边构成的图。给出了基于语言加权集结(LWA)算子和节点归约的发言节点评价方法。以系统体系结构设计问题的群体研讨为例，说明模型的可用性和有效性。

关键词: 研讨模型, 发言节点可接受度, 节点归约, 语言加权集结算子