Letian Ruan

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I am a sophomore student at University of Michigan, majoring Data Science under Computer Science and Engineering Department. Besides, I am also dual majoring in Mechanical Engineering at Shanghai Jiao Tong University.

Currently, I'm focusing on the research of machine learning systems, large language model infrastructures and high performance computing. To be more specific, I'm currently working on improving LLM inferring by quantilizing model parameters for memory reduction, parallelizing computing tasks for acceleration and optimizing kernel operators for efficiency. Besides, I am fortunate to be advised by Shixuan Sun in Emerging Parallel Computing Center from SJTU-CSE.

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Mar '5  

 I am admitted to the University of Michigan, College of Engineering, Computer Science and Engineering Department.

Oct '1  

 I joined the Emerging Parallel Computing Center as a research assistant under supervision of Prof. Shixuan Sun
Undergraduate Student | University of Michigan, Ann Arbor
August '25 - Present

B.S.E in Data Science, enrolled in College of Engineering, Computer Science and Engineering Department.

Undergraduate Student | Shanghai Jiao Tong University
September '22 - Present

B.E in Mechanical Engineering, enrolled in UM-SJTU Joint Institute.

Under construction. Coming soon.
The largest unofficial course review platform of SJTU

Open-sourse project. [website]

The website service is based on the Next.js and Gin, integrated with Vite, Redis, PostgreSQL and LLM to provide more personalized and faster reponses. As of November 2024, more than 28,000 users have posted over 33,000 reviews for 4,500+ courses.
Complete row-store relational database system

Course project of 15-445. [code]

This database management system implemented a buffer pool to improve memory utilization and developed Extensible HashTable for indexing and used Crabbing Protocol to add read-write locks. Besides, it also completed basic SQL operators and optimizers on the volcano model and built a centralized transaction manager based on the MVCC protocol, supporting snapshot isolation.
Simple distributed file system similar to Google File System

Course project of SE3331. [code]

This system has constructed a basic single-machine inode-based filesystem and extended it into a robust distributed filesystem with file splitting, lock manager and crash recovery. Also, it has built a MapReduce framework and achieve the Raft consensus algorithm of leader election, heartbeat mechanism, log replication protocol and snapshot mechanism.
Basic operating system based on the RISC-V architecture

Course project of 6.s081. [code]

In this basis operating system, I've added Lazy Allocation and Copy On Write functionality to the virtual memory module of the xv6 operating system and completed thread libraries and synchronization barriers to the kernel module and optimized the buffer pool management in the file system module of xv6 using finer-grained hash tables.

This template is a modification to Jon Barron's website.