Personal website of Haichao Wang, a master student at Tsinghua University.https://hychaowang.github.io/https://hychaowang.github.io/blog/a-simple-summary-of-modern-long-video-understanding-and-memory-system/https://hychaowang.github.io/blog/a-simple-summary-of-modern-long-video-understanding-and-memory-system/对长视频理解与记忆系统的简单总结。Sat, 11 Jul 2026 00:00:00 GMThttps://hychaowang.github.io/blog/modern-long-video-understanding-and-memory-system/https://hychaowang.github.io/blog/modern-long-video-understanding-and-memory-system/A simple summary of long video understanding and memory systems.Sat, 11 Jul 2026 00:00:00 GMThttps://hychaowang.github.io/blog/affectgpt-r1/https://hychaowang.github.io/blog/affectgpt-r1/The cold start stage uses large scale, coarse grained descriptive emotion data so that the model first acquires basic multimodal emotion understanding and output format alignment. It also provides a stable initialization for later reinforceFri, 10 Jul 2026 00:00:00 GMThttps://hychaowang.github.io/blog/grpo/https://hychaowang.github.io/blog/grpo/A practical introduction to Group Relative Policy Optimization (GRPO), covering why it removes the critic from PPO-style LLM training, how group-relative advantages are computed, and how to implement the core idea with TRL and PyTorch.Thu, 02 Jul 2026 00:00:00 GMThttps://hychaowang.github.io/blog/training-free-survey/https://hychaowang.github.io/blog/training-free-survey/This is a research report about training-free long video generation, including four main sections: 1) A general review of current development of training-free long video generation from different aspects. 2) A summary of base models and benchmarks. 3) Discussion, limitation and potential works. 4) ConclusionTue, 21 Apr 2026 00:00:00 GMThttps://hychaowang.github.io/projects/2026-leveraging-motion-estimation-for-efficient-bayer-domain-computer-vision/https://hychaowang.github.io/projects/2026-leveraging-motion-estimation-for-efficient-bayer-domain-computer-vision/IEEE International Conference on Image Processing (ICIP), 2026Thu, 01 Jan 2026 00:00:00 GMThttps://hychaowang.github.io/projects/2025-cross-modal-knowledge-distillation-for-enhanced-unimodal-emotion-recognition/https://hychaowang.github.io/projects/2025-cross-modal-knowledge-distillation-for-enhanced-unimodal-emotion-recognition/IEEE Transactions on Affective Computing, 2025Wed, 01 Jan 2025 00:00:00 GMThttps://hychaowang.github.io/projects/2024-mutual-distillation-extracting-spatial-temporal-knowledge-for-lightweight-multi-/https://hychaowang.github.io/projects/2024-mutual-distillation-extracting-spatial-temporal-knowledge-for-lightweight-multi-/ACM SIGKDD, 2024Mon, 01 Jan 2024 00:00:00 GMThttps://hychaowang.github.io/projects/2024-distillsleepnet-heterogeneous-multi-level-knowledge-distillation-via-teacher-ass/https://hychaowang.github.io/projects/2024-distillsleepnet-heterogeneous-multi-level-knowledge-distillation-via-teacher-ass/IEEE Transactions on Big Data, 2024Mon, 01 Jan 2024 00:00:00 GMThttps://hychaowang.github.io/projects/2023-emotionkd-a-cross-modal-knowledge-distillation-framework-for-emotion-recognition/https://hychaowang.github.io/projects/2023-emotionkd-a-cross-modal-knowledge-distillation-framework-for-emotion-recognition/ACM International Conference on Multimedia, 2023Sun, 01 Jan 2023 00:00:00 GMThttps://hychaowang.github.io/projects/2023-teacher-assistant-based-knowledge-distillation-extracting-multi-level-features-o/https://hychaowang.github.io/projects/2023-teacher-assistant-based-knowledge-distillation-extracting-multi-level-features-o/IJCAI, 2023Sun, 01 Jan 2023 00:00:00 GMT