I am first-year Ph.D. candidate @ Harvard University, advised by Prof. Minlan Yu.
I received the B.S. in Computer Science @ Peking University in 2018, advised by Prof. Tong Yang.
I am broadly interested in streaming algorithms, networked systems, and big data systems.


  1. Elastic Sketch: Adaptive and Fast Network-wide Measurements. PDF Download
    Tong Yang, Jie Jiang, Peng Liu, Qun Huang, Junzhi Gong, Yang Zhou, Rui Miao, Xiaoming Li, Steve Uhlig.
    SIGCOMM 2018. ACM SIGCOMM International Conference on Data Communications.
  2. Cold Filter: A Meta-Framework for Faster and More Accurate Stream Processing. PDF Download
    Yang Zhou, Tong Yang, Jie Jiang, Bin Cui, Minlan Yu, Xiaoming Li, and Steve Uhlig.
    SIGMOD 2018. ACM SIGMOD International Conference on Management of Data.
  3. Accelerating Network Measurement in Software. PDF Download
    Yang Zhou, Omid Alipourfard, Minlan Yu, and Tong Yang.
    SIGCOMM CCR July issue, ACM SIGCOMM Computer Communication Review.
  4. Accurate Per-Flow Measurement with Bloom Sketch. PDF Download
    Yang Zhou, Hao Jin, Peng Liu, Haowei Zhang, Tong Yang, Xiaoming Li.
    INFOCOM 2018 (poster). IEEE International Conference on Computer Communications.
  5. A Comparison of Performance and Accuracy of Measurement Algorithms in Software. PDF Download
    Omid Alipourfard, Masoud Moshref, Yang Zhou, Tong Yang, and Minlan Yu.
    SOSR 2018. ACM Symposium on SDN Research.
  6. Single Hash: Use One Hash Function to Build Faster Hash Based Data Structures. PDF Download
    Xiangyang Gou, Chenxingyu Zhao, Tong Yang, Lei Zou, Yang Zhou, Yibo Yan, Xiaoming Li, and Bin Cui.
    BigComp 2018. IEEE International Conference on Big Data and Smart Computing.
  1. Pyramid Sketch: a Sketch Framework for Frequency Estimation of Data Streams. PDF Download
    Tong Yang, Yang Zhou, Hao Jin, Shigang Chen, and Xiaoming Li.
    VLDB 2017. International Conference on Very Large Data Bases.
  2. One Memory Access Sketch: a More Accurate and Faster Sketch for Per-flow Measurement. PDF Download
    Yang Zhou, Peng Liu, Hao Jin, Tong Yang, Shoujiang Dang, and Xiaoming Li.
    Globecom 2017. IEEE Global Communications Conference.
  3. ABC: a Practicable Sketch Framework for Non-uniform Multisets. PDF Download
    Junzhi Gong, Tong Yang, Yang Zhou, Dongsheng Yang, Shigang Chen, Bin Cui, and Xiaoming Li.
    BigData 2017. IEEE International Conference on Big Data.


Algorithm Design and Analysis, TA, Peking University, 2018.

Research Experience

Research Intern at Yale University
  • June 2017 - January 2018; Advisor: Minlan Yu
  • Building a performance diagnosis system for NFV chains.
    • Build a user-oriented on-demand performance diagnosis system for NFV chains; users write declarative language to locate faults in NFV chains when they notice performance anomalies.
    • Develop a SQL-like language to support a variety of user-defined queries.
    • Utilize a per-batch monitoring method to minimize performance impact to existing NFV chains.
  • Designing generic modules to enable fast and accurate measurement in software.
    • Investigated various algorithms for different network measurement tasks, and found that filtering out numerous small flows helps improve their accuracy.
    • Designed a generic module, named cold filter, to efficiently perform such filtering operation (part of this work was done at Peking University).
    • Presented a novel packet-aggregating method assisted by modern SIMD instructions to improve the processing speed of existing measurement algorithms.
Research Intern at Peking University
  • April 2016 - March 2017; Advisor: Tong Yang
  • Improving the accuracy and performance of flow size estimation in software.
    • Proposed two data structures (the ABC and Pyramid sketches) to automatically and dynamically allocate memory for each flow in real time, achieving high accuracy for flow size estimation.
    • Proposed to constrain the multiple hashed counters of each flow into one machine word to reduce the cost of both memory accesses and hash computations.
    • Proposed the One Memory Access sketch to do automatic and dynamic memory allocation with two memory accesses per packet in the worst case, guaranteeing performance stability.

Intern Experience

SenseTime: System Operation and Maintenance Group

Awards & Honors

  • Top Ten undergraduate Dissertation Award of PKU EECS (10/327), 2018.
  • New Academic Star Award of EECS (1/193), Peking University, 2018.
  • Arawana Scholarship (2/193), Peking University, 2017.
  • Exceptional Award for Academic Innovation (2/193), Peking University, 2017.
  • Merit Student Honor, Peking University, 2017.
  • Honorable Mention in Mathematical Contest in Modelling, 2017.
  • Peking University ACM/ICPC Third Prize, Peking University, 2016, 2017.
  • Pinyou Hudong Scholarship, Peking University, 2016.
  • Peking University ACM Summer School First Prize, Peking University, 2015.
  • May Fourth Scholarship, Peking University, 2015.
  • Academic Improvement Honor, Peking University, 2015.


  • I love running. I can finish a half-marathon (13.1 miles) within 2h, and I will try a marathon soon.
  • I enjoy bike riding. I have finished cycling around Taiwan (about 700 miles) within ten days. More about this trip!
  • I am interested in physics. I also take some physics courses in the first year at Peking University.