Management Review ›› 2023, Vol. 35 ›› Issue (3): 148-159.

• E-business and Information Management • Previous Articles     Next Articles

Next POI Recommendation for Multi-gate Hybrid Experts Based on Sparse Sharing

Kang Laisong1,2, Liu Shifeng1, Gong Daqing1   

  1. 1. School of Economics and Management, Beijing Jiaotong University, Beijing 100044;
    2. Party School of National Energy Investment Group Co., Ltd., Beijing 102211
  • Received:2021-03-01 Online:2023-03-28 Published:2023-04-28

Abstract: Next POI recommendation refers to predicting the next POI that the user will visit within a certain period of time. User travel patterns are affected by heterogeneous contextual factors, including continuous values (for example, geographic distance, time interval) and discrete values (for example, social status, weekly status). This paper uses a sparse sharing structure to generate expert networks, and uses a multi-gate hybrid expert model to realize parameter sharing between multiple target tasks. This paper models multiple types of user behaviors based on multi-task learning, and proposes a multi-gate hybrid expert model based on sparse sharing. First, the sparse sharing structure is used to generate the corresponding expert network from the basic network for each target task, and the iterative amplitude pruning method is used to select the expert network. Secondly, the multi-gate hybrid expert model uses expert networks as the input layer. Each expert network has a different emphasis on the processing of input information, and uses multiple door networks to share and select task targets. Finally, the proposed algorithm is evaluated based on real data sets. The evaluation of the proposed algorithm based on real data sets verifies the effectiveness and practicability of the method in this chapter, as well as the prospect of applying multi-task learning and sparse structure sharing to the next point of interest recommendation.

Key words: location-based social networks, next POI recommendation, neural networks, multi-task learning, sparse sharing architectures