Search Results for author: Yitong Ji

Found 5 papers, 4 papers with code

Our Model Achieves Excellent Performance on MovieLens: What Does it Mean?

1 code implementation19 Jul 2023 Yu-chen Fan, Yitong Ji, Jie Zhang, Aixin Sun

First, there are significant differences in user interactions at the different stages when a user interacts with the MovieLens platform.

Recommendation Systems

Retraining A Graph-based Recommender with Interests Disentanglement

no code implementations5 May 2023 Yitong Ji, Aixin Sun, Jie Zhang

Then we blend the historical and new preferences in the form of node embeddings in the new graph, through a Disentanglement Module.

Disentanglement Incremental Learning +2

Do Loyal Users Enjoy Better Recommendations? Understanding Recommender Accuracy from a Time Perspective

1 code implementation12 Apr 2022 Yitong Ji, Aixin Sun, Jie Zhang, Chenliang Li

Our study offers a different perspective to understand recommender accuracy, and our findings could trigger a revisit of recommender model design.

Recommendation Systems

A Critical Study on Data Leakage in Recommender System Offline Evaluation

1 code implementation21 Oct 2020 Yitong Ji, Aixin Sun, Jie Zhang, Chenliang Li

To evaluate recommendation systems in a realistic manner in offline setting, we propose a timeline scheme, which calls for a revisit of the recommendation model design.

Collaborative Filtering Recommendation Systems

A Re-visit of the Popularity Baseline in Recommender Systems

1 code implementation28 May 2020 Yitong Ji, Aixin Sun, Jie Zhang, Chenliang Li

On the widely used MovieLens dataset, we show that the performance of popularity could be significantly improved by 70% or more, if we consider the popular items at the time point when a user interacts with the system.

Recommendation Systems

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