基于软约束满足理论的用户偏好建模方法

用户建模是电子商务领域的重要研究问题之一，但是到目前为止还没有非常有效的方法能够建模用户的动态偏好等特征。在分析电子商务领域用户偏好特征获取一般特点的基础上，提出基于实例的两阶段递增式用户偏好特征获取方法。并采用基于半环的软约束满足问题表示用户的各类偏好特征，将用户建模看成是潜在方案空间上施加一系列偏好约束的过程。提出不同的偏好约束类型以及利用偏好约束建立用户模型的过程，实现电子商务领域复杂用户偏好的灵活建模。

User Preference Modeling Based on Soft Constraint Satisfaction Theory

User modeling is one of important research topics in electronic commerce. Until now very effective methods of modeling user’s dynamic preferences haven’t been proposed. In this paper after analyzing the characteristics of general preference modeling, a two-stage incremental preference elicitation approach based on cases is proposed. And semiring-based soft constraints are used to represent various user preferences. User preference modeling is considered as the process of adding preference constraints on decision spaces. Different types of preference constraints are proposed as well as the process of user preference modeling. This method can be used to flexibly model user dynamic preferences.