[
  {
    "title": "RAPID: An Efficient and Accurate Ratio-Based Analytical Proxy for Interconnect Delay",
    "type": "Publication",
    "date": "2027-01-25",
    "venue": "ASPDAC'27",
    "authors": "Haichuan Liu, Zizheng Guo, Zuodong Zhang, Yuanqing Cheng, Guannan Guo, Runsheng Wang, Yibo Lin",
    "excerpt": "Iterative physical-design optimization requires accurate timing feedback at proxy-timer speed. Conventional interconnect models expose an accuracy–efficiency tradeoff: Elmore delay is fast but loses waveform-shape information, whereas higher-order methods improve fidelity at the cost of more expensive distribution or waveform evaluation. We introduce RAPID, a ratio-based analytical proxy that moves Elmore delay toward higher-order timing fidelity through a positive, slew-aware delay-ratio correction. RAPID derives the correction from Wilson–Hilferty asymptotics of a moment-matched Gamma res...",
    "url": "/publication/2027-01-25-rapid"
  },
  {
    "title": "PACT: A Runtime Contract for Sparse-Topology Updates in GPU-Accelerated Timing ECOs",
    "type": "Publication",
    "date": "2027-01-25",
    "venue": "ASPDAC'27",
    "authors": "Haichuan Liu, Zizheng Guo, Zuodong Zhang, Haoyi Zhang, Chunyuan Zhao, Kairong Guo, Shenglu Hua, Guannan Guo, Yibo Lin",
    "excerpt": "Timing ECO flows repeatedly modify circuit topology, yet GPU-accelerated Static Timing Analysis (STA) engines built on static sparse layouts commonly rebuild and resynchronize the GPU-visible topology after each edit. Existing GPU-accelerated STA work instead co-designs dynamic representations with application-specific kernels, exposing representation assumptions to consumers and limiting reuse with CSR-based analyses. We present PACT (Private Atomic Committed Topology), a runtime contract that keeps the mutation representation runtime-private behind a representation-independent committed-t...",
    "url": "/publication/2027-01-25-pact"
  },
  {
    "title": "ScoutCell: Sensitivity-Guided Coupling Optimization for Timing-Driven Standard Cell Synthesis",
    "type": "Publication",
    "date": "2026-11-08",
    "venue": "ICCAD'26",
    "authors": "Kairong Guo, Haoyi Zhang, Haichuan Liu, Chunyuan Zhao, Yibo Lin",
    "excerpt": "In advanced-node standard cell synthesis, timing optimization is increasingly limited by parasitic coupling effects that are not well captured by wirelength-centric heuristics alone. While recent timing-driven approaches improve delay by shortening critical paths, they often overlook the disproportionate impact of parasitic coupling on specific delay-critical net pairs. In this work, we propose ScoutCell, a sensitivity-guided standard-cell synthesis framework that follows a characterize-then-optimize flow. ScoutCell first extracts a reusable pairwise sensitivity prior from an anchor layout,...",
    "url": "/publication/2026-11-08-scoutcell"
  },
  {
    "title": "ElmoreCeff: A GPU-Friendly Elmore-Like Delay Calculator with a Closed-Form Effective Capacitance Model",
    "type": "Publication",
    "date": "2026-05-08",
    "venue": "ISEDA'26",
    "authors": "Haichuan Liu, Zizheng Guo, Runsheng Wang, Yibo Lin",
    "excerpt": "Accurate and efficient delay calculation is critical for timing-driven optimization, yet existing methods require a trade-off between fast but inaccurate Elmore timers and accurate but slow model order reduction (MOR) techniques. To bridge this gap, we introduce ElmoreCeff, a GPU-friendly Elmore-like delay calculator based on a closed-form effective capacitance model. ElmoreCeff can achieve speedups of up to 40.95\\(\\times\\) and 5.95\\(\\times\\) over CPU- and GPU-based MOR timers, respectively, while achieving comparable accuracy. This advantage enhances final quality of results (QoR) of timin...",
    "url": "/publication/2026-05-08-elmoreceff"
  },
  {
    "title": "HeteroSTA: A CPU-GPU Heterogeneous Static Timing Analysis Engine with Holistic Industrial Design Support",
    "type": "Publication",
    "date": "2026-01-19",
    "venue": "ASPDAC'26",
    "authors": "Zizheng Guo, Haichuan Liu, Xizhe Shi, Shenglu Hua, Zuodong Zhang, Chunyuan Zhao, Runsheng Wang, Yibo Lin",
    "excerpt": "We introduce in this paper, HeteroSTA, the first CPU-GPU heterogeneous timing analysis engine that efficiently supports: (1) a set of delay calculation models providing versatile accuracy-speed choices without relying on an external golden tool, (2) robust support for industry formats, including especially the .sdc constraints containing all common timing exceptions, clock domains, and case analysis modes, and (3) end-to-end GPU-acceleration for both graph-based and path-based timing queries, all exposed as a zero-overhead flattened heterogeneous application programming interface (API). Het...",
    "url": "/publication/2026-01-19-heterosta"
  },
  {
    "title": "IncreGPUSTA: GPU-Accelerated Incremental Static Timing Analysis for Iterative Design Flows",
    "type": "Publication",
    "date": "2025-10-26",
    "venue": "ICCAD'25",
    "authors": "Haichuan Liu, Zizheng Guo, Runsheng Wang, Yibo Lin",
    "excerpt": "Static timing analysis (STA) plays an essential role in VLSI design optimization. While CPU-based incremental STA methods reduce computational overhead by selectively updating affected circuit regions, and GPU-accelerated engines improve full-circuit analysis throughput, effectively combining these approaches has remained challenging. Existing solutions offer only partial incrementality, either switching to CPU processing for small modifications or handling solely delay value changes without supporting structural updates. We introduce IncreGPUSTA, a novel GPU-accelerated incremental STA alg...",
    "url": "/publication/2025-10-26-incregpusta"
  },
  {
    "title": "Recognized as an Outstanding Graduate of Peking University",
    "type": "Activity",
    "date": "2026-06-11",
    "venue": "",
    "authors": "",
    "excerpt": "I am honored to be recognized as an Outstanding Graduate of Peking University (北京大学优秀毕业生).I am grateful to my advisor, collaborators, friends, and family for their guidance and support throughout my undergraduate studies.",
    "url": "/posts/2026/06/outstanding-graduate-pku/"
  },
  {
    "title": "Named an Outstanding Graduate of Beijing Municipal Institutions of Higher Learning",
    "type": "Activity",
    "date": "2026-06-11",
    "venue": "",
    "authors": "",
    "excerpt": "I am honored to have been named an Outstanding Graduate of Beijing Municipal Institutions of Higher Learning (北京市普通高等学校优秀毕业生).I am grateful to my advisor, collaborators, friends, and family for their guidance and support throughout my undergraduate studies at Peking University.",
    "url": "/posts/2026/06/outstanding-graduate-beijing/"
  },
  {
    "title": "Received the National Scholarship for Academic Year 2024-2025",
    "type": "Activity",
    "date": "2025-12-31",
    "venue": "",
    "authors": "",
    "excerpt": "I am honored to share that I have been awarded the National Scholarship (国家奖学金) for the academic year 2024-2025 at Peking University.The National Scholarship is the highest honor awarded by the Ministry of Education of China to students who demonstrate outstanding academic performance and comprehensive qualities.Sincere gratitude to everyone who has supported me along the way!",
    "url": "/posts/2025/12/nationalscholarship2025/"
  },
  {
    "title": "Won Second Place in the EDAthon 2025 Contest",
    "type": "Activity",
    "date": "2025-12-01",
    "venue": "",
    "authors": "",
    "excerpt": "I am pleased to share that Shenglu Hua and I have won the Second Place in the EDAthon 2025 Contest, advised by Prof. Yibo Lin.Organized by the Hong Kong University of Science and Technology (HKUST), EDAthon is a whole-day programming contest featuring interesting and challenging topics in Electronic Design Automation (EDA). This year’s event was generously sponsored by Cadence, UniVista, HiSilicon, and the IEEE CEDA family (Global, HK, and GZ Chapters).The official news is available here: https://sites.google.com/view/ceda-hk/edathon-2025Sincere gratitude to our advisor, the organizers, and...",
    "url": "/posts/2025/12/edathon2025/"
  },
  {
    "title": "About Me",
    "type": "Page",
    "date": "",
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    "authors": "",
    "excerpt": "",
    "url": "/"
  },
  {
    "title": "Activities",
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    "url": "/activities/"
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  {
    "title": "CV",
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    "excerpt": "",
    "url": "/cv/"
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  {
    "title": "Publications",
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    "url": "/publications/"
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  {
    "title": "Sitemap",
    "type": "Page",
    "date": "",
    "venue": "",
    "authors": "",
    "excerpt": "",
    "url": "/sitemap/"
  }
]