📎 About Me

I work at International Digital Economy Academy as a research scientist now in Shenzhen, China. Prior to joining IDEA, I worked at Tencent as a Senior Researcher. I hold a Ph.D. degree in Control Science and Engineering, and a B.S. degree in Automation Science and Technology, both from Xi’an Jiaotong University, under the supervision of Prof. Pinghui Wang.

I am now working on MLLM, graph learning, and time series analysis. If you are seeking any form of academic cooperation, please feel free to email me at qiyiyan@idea.edu.cn. We are hiring interns!🔥🔥

🔥 News

• 2025.02: 🎉 Our work ChartMoE is selected as an Oral (1.8% of the submitted papers) at ICLR 2025
• 2025.01: 🎉 Two papers are accepted by ICLR 2025
• 2025.01: 🎉 One paper is accepted by NAACL 2025
• 2025.01: 🎉 One paper is accepted by WWW 2025
• 2024.05: 🎉 Two papers are accepted by KDD 2024
• 2024.05: 🎉 One paper is accepted by TKDE
• 2024.01: 🎉 One paper is accepted by ICLR 2024
• 2023.08: I am supported by the National Natural Science Foundation of China

📝 Selected Publications (*equal contribution, #corresponding author)

ICLR 2025 Oral

ChartMoE: Mixture of Diversely Aligned Expert Connector for Chart Understanding
Zhengzhuo Xu*, Bowen Qu*, Yiyan Qi*, SiNan Du, Chengjin Xu, Chun Yuan, Jian Guo

Project

ICLR 2025

Rationalizing and Augmenting Dynamic Graph Neural Networks
Guibin Zhang*, Yiyan Qi*, Ziyang Cheng, Yanwei Yue, Dawei Cheng, Jian Guo

KDD 2024

Latent Diffusion-based Data Augmentation for Continuous-Time Dynamic Graph Model
Yuxing Tian*, Yiyan Qi*, Aiwen Jiang, Qi Huang, Jian Guo

• KDD 2024 QSketch: An Efficient Sketch for Weighted Cardinality Estimation in Streams, Yiyan Qi, Rundong Li, Pinghui Wang, Yufang Sun, Rui Xing

ICLR 2024

FreeDyG: Frequency Enhanced Continuous-Time Dynamic Graph Model for Link Prediction
Yuxing Tian*, Yiyan Qi*#, Fan Guo

Project

arXiv

ChartBench: A Benchmark for Complex Visual Reasoning in Charts
Zhengzhuo Xu, Sinan Du, Yiyan Qi, Chengjin Xu, Chun Yuan, Jian Guo

Project

TKDE 2024

Natural Language Interfaces for Tabular Data Querying and Visualization: A Survey
Weixu Zhang, Yifei Wang, Yuanfeng Song, Victor Junqiu Wei, Yuxing Tian, Yiyan Qi, Jonathan H. Chan, Raymond Chi-Wing Wong, Haiqin Yang

• KDD 2022 Multi-task fusion via reinforcement learning for long-term user satisfaction in recommender systems, Qihua Zhang, Junning Liu, Yuzhuo Dai, Yiyan Qi, Yifan Yuan, Kunlun Zheng, Fan Huang, Xianfeng Tan

• KBS 2020 Discriminative streaming network embedding, Yiyan Qi, Jiefeng Cheng, Xiaojun Chen, Reynold Cheng, Albert Bifet, Pinghui Wang

• TKDE 2020 Streaming algorithms for estimating high set similarities in loglog space, Yiyan Qi, Pinghui Wang, Yuanming Zhang, Qiaozhu Zhai, Chenxu Wang, Guangjian Tian, John CS Lui, Xiaohong Guan

• WWW 2020 Fast generating a large number of gumbel-max variables, Yiyan Qi, Pinghui Wang, Yuanming Zhang, Junzhou Zhao, Guangjian Tian, Xiaohong Guan

• KDD 2019 A memory-efficient sketch method for estimating high similarities in streaming sets, Pinghui Wang, Yiyan Qi*#, Yuanming Zhang, Qiaozhu Zhai, Chenxu Wang, John CS Lui, Xiaohong Guan

• VLDB 2018 Approximately counting triangles in large graph streams including edge duplicates with a fixed memory usage, Pinghui Wang, Yiyan Qi*#, Yu Sun, Xiangliang Zhang, Jing Tao, Xiaohong Guan

📖 Educations

• 2014.09 - 2021.06, Ph.D, The School of Automation Science and Engineering, Xi’an Jiaotong Univeristy, Xi’an.
• 2019.10 - 2020.10, Visiting student, NUS, Singapore.
• 2010.09 - 2014.06, Undergraduate, Xi’an Jiaotong Univeristy, Xi’an.

💻 Career

• 2021.08 - 2022.09, Senior Researcher, Tencent, Shenzhen.
• 2017.04 - 2018.10, Intern, Tencent, Shenzhen.