Ruiying Ma

I received a B.Eng in Computer Science and Technology from Tsinghua University, IIIS in June, 2025. Prior to that, I visited UC Berkeley as a student researcher, where I was advised by Prof. Aditya Parameswaran and worked on designing databases for unstructured data, especially documents. I also worked as a research intern at the Systems and Networking Research Group of Microsoft Resarch Asia, where I studied caching problems with Dr. Chieh-Jan Mike Liang, Prof. Francis Y. Yan, and Yanjie Gao.

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Research

I am interested in Computer Systems, especially Databases. Currently, I'm working on databases for PDF documents, a common category of unstructured data. Sepcifically, I formulate, analyze, and leverage various structures from real-world PDFs to improve efficiency and accuracy in document analytics. I'm also working on a traditional computer system problem: caching. I design and analyze new cache replacement policies that achieve state-of-the-art efficiency on evolving system workloads.

Publications

By leveraging semantic hierarchical structures from templatized documents, we design ZenDB, a document analytics system with a novel query engine, for accurate and cost-effective (~31x cost savings) query execution.

Source code from Jon Barron's website.