关键词: 三支决策, 序列决策, 短信（SMS）, 多阶段垃圾短信过滤, 粒计算

Abstract: This paper proposes a multistage three-way decisions of spam SMS (short messaging service) filtering model. By using different granularity information to express the SMS, with the sequence decisions (i.e., multistage, multiple steps in decision-making), at different decision-making stages, based on different information granularity respectively three-way decision-making, those can avoid to make irrational decisions when the message size is too big or insufficient information. If the information does not meet the current decision-making conditions, this model can add enough granularity information before making a further decision. Finally, the experimental results prove the rationality and validity of the model.

Key words: three-way decisions, sequence decision, short messaging service (SMS), multistage spam SMS filtering, granular computing