no code implementations • 27 May 2024 • Ruizhong Qiu, Hanghang Tong
In this paper, we propose *Gradient Compressed Sensing* (GraCe), a query-efficient and accurate estimator for sparse gradients that uses only $O\big(s\log\log\frac ds\big)$ queries per step and still achieves $O\big(\frac1T\big)$ rate of convergence.
no code implementations • 19 May 2024 • Zhe Xu, Ruizhong Qiu, Yuzhong Chen, Huiyuan Chen, Xiran Fan, Menghai Pan, Zhichen Zeng, Mahashweta Das, Hanghang Tong
Graph is a prevalent discrete data structure, whose generation has wide applications such as drug discovery and circuit design.
no code implementations • 17 Mar 2024 • Lihui Liu, ZiHao Wang, Ruizhong Qiu, Yikun Ban, Eunice Chan, Yangqiu Song, Jingrui He, Hanghang Tong
Through the utilization of both knowledge graph reasoning and LLMs, it successfully derives answers for each subquestion.
no code implementations • 29 Aug 2023 • Hyunsik Yoo, Zhichen Zeng, Jian Kang, Ruizhong Qiu, David Zhou, Zhining Liu, Fei Wang, Charlie Xu, Eunice Chan, Hanghang Tong
In the ever-evolving landscape of user-item interactions, continual adaptation to newly collected data is crucial for recommender systems to stay aligned with the latest user preferences.
1 code implementation • 27 Aug 2023 • Zhining Liu, Ruizhong Qiu, Zhichen Zeng, Hyunsik Yoo, David Zhou, Zhe Xu, Yada Zhu, Kommy Weldemariam, Jingrui He, Hanghang Tong
In this work, we approach the root cause of class-imbalance bias from an topological paradigm.
1 code implementation • 1 Jun 2023 • Ruizhong Qiu, Dingsu Wang, Lei Ying, H. Vincent Poor, Yifang Zhang, Hanghang Tong
They are exclusively based on the maximum likelihood estimation (MLE) formulation and require to know true diffusion parameters.
no code implementations • 29 May 2023 • Dingsu Wang, Yuchen Yan, Ruizhong Qiu, Yada Zhu, Kaiyu Guan, Andrew J Margenot, Hanghang Tong
First, we define the problem of imputation over NTS which contains missing values in both node time series features and graph structures.
1 code implementation • 8 Oct 2022 • Ruizhong Qiu, Zhiqing Sun, Yiming Yang
Recently, deep reinforcement learning (DRL) models have shown promising results in solving NP-hard Combinatorial Optimization (CO) problems.