{
  "version": 1,
  "updatedAt": "2026-04-02T00:00:00+08:00",
  "site": {
    "name": "Chijun Sima",
    "url": "https://www.chijunsima.com/"
  },
  "publications": [
    {
      "id": "ekko-osdi-2022",
      "title": "Ekko: A Large-Scale Deep Learning Recommender System with Low-Latency Model Update",
      "venue": "OSDI '22",
      "venueFull": "16th USENIX Symposium on Operating Systems Design and Implementation",
      "year": 2022,
      "datePublished": "2022",
      "authors": [
        "Chijun Sima",
        "Yao Fu",
        "Man-Kit Sit",
        "Liyi Guo",
        "Xuri Gong",
        "Feng Lin",
        "Junyu Wu",
        "Yongsheng Li",
        "Haidong Rong",
        "Pierre-Louis Aublin",
        "Luo Mai"
      ],
      "authorLine": "Chijun Sima*, Yao Fu*, Man-Kit Sit, Liyi Guo, Xuri Gong, Feng Lin, Junyu Wu, Yongsheng Li, Haidong Rong, Pierre-Louis Aublin, Luo Mai",
      "url": "https://www.usenix.org/conference/osdi22/presentation/sima",
      "note": "* co-first author. Supervised by Luo Mai.",
      "summary": "Low-latency model update system for multi-terabyte deep learning recommendation models, achieving 2.4s update latency, 10,000x model-size scaling, and large production impact in WeChat."
    },
    {
      "id": "dba-kernel-ieee-access-2019",
      "title": "Dynamic Barycenter Averaging Kernel in RBF Networks for Time Series Classification",
      "venue": "IEEE Access",
      "venueFull": "IEEE Access",
      "year": 2019,
      "datePublished": "2019",
      "authors": [
        "Kejian Shi",
        "Hongyang Qin",
        "Chijun Sima",
        "Sen Li",
        "Lifeng Shen",
        "Qianli Ma"
      ],
      "authorLine": "Kejian Shi, Hongyang Qin, Chijun Sima, Sen Li, Lifeng Shen, Qianli Ma",
      "url": null,
      "note": "2019.",
      "summary": "Time-series classification work on dynamic barycenter averaging kernels in RBF networks."
    }
  ],
  "source": {
    "homepage": "https://www.chijunsima.com/#publications",
    "llmsFull": "https://www.chijunsima.com/llms-full.txt",
    "googleScholar": "https://scholar.google.com/citations?user=8-HD_IEAAAAJ&hl=en"
  }
}