About me

[Updated on 24th Feb, 2026]

Hi! I’m Yihao Liu (刘奕好), a fifth-year PhD student at IIIS, Tsinghua University, advised by Huanchen Zhang. I hold a bachelor’s degree from Yuanpei College, Peking University. Download my CV here. Please contact me via yhliu918@gmail.com or the telephone number in my CV. (Notice that liuyihao21@mails.tsinghua.edu.cn is an abandoned email address)

Research Focus

Database Systems: Optimizing modern analytical engines (e.g., DuckDB, Presto). My published work explores co-designing storage and execution for memory-efficient query processing.
RL Infra: Researching posttraining infra for (diffusion) large language models. I’m looking for opportunities to build efficient LLM infrastructure.

Published Papers

Database Papers

Theme: Co-designing storage and execution for memory-efficient query processing

VLDB ‘25 | Selective Late Materialization in Modern Analytical Databases
Yihao Liu, Shaoxuan Tang, Yulong Hui, Hangrui Zhou, Huanchen Zhang
PDF | Code

SIGMOD ‘24 | LeCo: lightweight compression via learning serial correlations
Yihao Liu, Xinyu Zeng, Huanchen Zhang
PDF | Code

CIDR ‘24 | Cost-Intelligent Data Analytics in the Cloud
Huanchen Zhang, Yihao Liu, Jiaqi Yan
PDF | Code

Preprint | NovaPipe: NUMA-aware Proactive Pipeline Segmentation in Vectorized Execution
Hangrui Zhou*, Yihao Liu*, Jiaoyi Zhang, Mingyu Gao, Huanchen Zhang

SIGMOD ‘26 | G-LeCo: A GPU-Accelerated Framework for High-Throughput Learned Compression
Youyang Xia, Feng Zhang, Jiawei Guan, Yihao Liu, Huanchen Zhang, Xiaoyong Du

LLM Papers

Preprint | LATTS: LAtent space Test Time Scaling for diffusion language models Yihao Liu, Hangrui Zhou, Ermo Hua, Shuang cheng, Dawei Liu, Kaiyan Zhang,Huanchen Zhang, Biqing Qi, Bowen Zhou PDF

EMNLP ‘25 (Findings) | OkraLong: A Flexible Retrieval-Augmented Framework for Long-Text Question Answering
Yulong Hui, Yihao Liu, Yao Lu, Huanchen Zhang
PDF

SIGMOD ‘26 | Scale-Doc: Scaling LLM-based Predicates over Enormous Documents
Hengrui Zhang*, Yulong Hui*, Yihao Liu, Huanchen Zhang
PDF | Code

Preprint | A survey of reinforcement learning for large reasoning models
Kaiyan Zhang, Yuxin Zuo, … Yihao Liu, …, Biqing Qi, Ning Ding, Bowen Zhou PDF

Preprint | Nirvana: A Specialized Generalist Model With Task-Aware Memory Mechanism
Yuhua Jiang, Shuang Cheng, Yihao Liu, Ermo Hua, Che Jiang, Weigao Sun, Yu Cheng, Feifei Gao, Biqing Qi, Bowen Zhou PDF

* means equal contribution

Personal hobbies

My personal hobbies include classical music (big fan of Daniel Barenboim and Janine Jansen), singing, and traveling. Currently practicing Deutsch. Danke für ihre Aufmerksamkeit.