提出SPOT-Trip框架,分离建模用户静态与动态兴趣,提升异地旅行推荐效果。
SPOT-Trip: Dual-Preference Driven Out-of-Town Trip Recommendation
- 分离建模静态与动态用户偏好,用知识图谱增强语义表示
- 通过神经微分方程捕捉偏好连续演化,结合时间点过程描述行为概率
- 在真实数据上提升推荐性能最高17.01%,适合个性化旅游规划场景
异地旅行推荐旨在基于用户起点、终点和行程时长等信息,生成其首次访问区域的景点序列。准确建模用户复杂偏好——通常具有静态与动态双重特性——是实现有效推荐的关键。然而,异地签到数据稀疏,难以捕捉此类偏好;现有方法常混淆静态与动态偏好,导致性能不佳。本文首次系统研究该问题,提出新颖框架SPOT-Trip,显式学习双重偏好。为应对数据稀缺,构建景点属性知识图谱,通过属性关系感知聚合增强对用户家乡及异地签到的语义建模,实现静态偏好学习。采用神经常微分方程(ODEs)捕捉潜在动态偏好的连续演化,并创新性结合时间点过程描述每种偏好行为的瞬时发生概率。进一步设计静态-动态融合模块整合两类偏好。在真实数据上的大量实验表明,所提方法性能提升最高达17.01%。
原文摘要 · Abstract (English)
Out-of-town trip recommendation aims to generate a sequence of Points of Interest (POIs) for users traveling from their hometowns to previously unvisited regions based on personalized itineraries, e.g., origin, destination, and trip duration. Modeling the complex user preferences--which often exhibit a two-fold nature of static and dynamic interests--is critical for effective recommendations. However, the sparsity of out-of-town check-in data presents significant challenges in capturing such user preferences. Meanwhile, existing methods often conflate the static and dynamic preferences, resulting in suboptimal performance. In this paper, we for the first time systematically study the problem of out-of-town trip recommendation. A novel framework SPOT-Trip is proposed to explicitly learns the dual static-dynamic user preferences. Specifically, to handle scarce data, we construct a POI attribute knowledge graph to enrich the semantic modeling of users' hometown and out-of-town check-ins, enabling the static preference modeling through attribute relation-aware aggregation. Then, we employ neural ordinary differential equations (ODEs) to capture the continuous evolution of latent dynamic user preferences and innovatively combine a temporal point process to describe the instantaneous probability of each preference behavior. Further, a static-dynamic fusion module is proposed to merge the learned static and dynamic user preferences. Extensive experiments on real data offer insight into the effectiveness of the proposed solutions, showing that SPOT-Trip achieves performance improvement by up to 17.01%.
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