Xiaochen Wang

Course Concept Extraction in MOOC via Explicit/Implicit Representation

2018

Massive Open Online Courses(MOOCs) provide convenient access to knowledge for learners all over the world. Concept Extraction is a basic requirement in MOOCs. However, textual content in MOOCs, such as video subtitles and quizzes, are …

Hierarchical Pretraining on Multimodal Electronic Health Records

2023 · arXiv (Cornell University)

Pretraining has proven to be a powerful technique in natural language processing (NLP), exhibiting remarkable success in various NLP downstream tasks. However, in the medical domain, existing pretrained models on electronic health records (EHR) fail …

Disentangling ID and Modality Effects for Session-based Recommendation

2024

Session-based recommendation aims to predict intents of anonymous users based on their limited behaviors. Modeling user behaviors involves two distinct rationales: co-occurrence patterns reflected by item IDs, and fine-grained preferences represented by item modalities (e.g., …