Zhenzhong Hu

    He received both his BE and PhD degree in the Department of Civil Engineering at Tsinghua University, China. He was a visiting researcher in Carnegie Mellon University.
    He is now the associate professor in Shenzhen International Graduate School, Tsinghua University, and also the secretary general of the BIM Specialty Committee of the China Graphics Society.
    His research interests include information technologies in civil and marine engineering, building information modeling (BIM) and digital disaster prevention and mitigation.
  • 2025-11-03

    2025-11-03

    The paper "Three-dimensional spatiotemporal simulation of tritium discharge from Fukushima" has been published in the journal Ocean Modelling. 

    The ALPS treated water has been discharged into the Pacific Ocean since August 2023.  This study investigates this discharge using a newly developed three-dimensional dispersion model that incorporates migration, diffusion, and decay processes of radionuclides.  A simulation over ten years is conducted using reanalyzed oceanographic data.  The results indicate that tritium released from Fukushima primarily disperses eastward along the 35°N latitude line.  In later stages, local concentration peaks emerge in the northeastern Pacific, exceeding those in the northwest Pacific.  For the vertical distribution, the tritium is generally reduced greatly with depth, but displays maximum values at subsurface layer (∼50m) in some regions.  The concentration reaches a steady state over time, defined as the characteristic concentration, whose spatial distribution and attainment time are detailed.  For major fishing grounds in the Pacific Ocean, the Hokkaido area shows the highest tritium levels, followed by Hawaii, California, Zhoushan, the Korean Peninsula, Mexico, the Philippines, Alaska, and Peru in descending order.  Critically, simulated tritium concentrations in most North Pacific regions (∼0.01 Bq/m3) remain orders of magnitude below natural background levels (∼50 Bq/m3).  This research elucidates three-dimensional radionuclide dispersion mechanisms in global oceans, providing a quantitative methodology for future marine emergency response and contributing to long-term marine conservation efforts.

    Note: Ocean Modelling is a Q1 journal in the field of geosciences with an impact factor of 2.9. The first author of the paper is doctoral student Liu Yi, and I and Professor Chen Shengli are the corresponding authors. The research was funded by the Guangdong Provincial Foundation for Basic and Applied Basic Research and the Laoshan Laboratory.

  • 2025-11-01

    2025-11-01

    On November 1st, the 4th China Ocean Engineering Science and Technology Innovation Forum and the Inauguration Ceremony of the Journal "Ocean" were grandly held at Tsinghua SIGS, co-organized by Tsinghua SIGS and the Institute of Ocean Engineering of Tsinghua University, which was hosted by the Chinese Society of Oceanography. Academicians Zhang Jianmin and Ou Jinping of the Chinese Academy of Engineering, Liu Bilu, the vice dean of Tsinghua SIGS, relevant officials from the Shenzhen Marine Development Bureau, and nearly 400 experts and scholars from more than 30 domestic universities, enterprises and institutions attended this forum together.

    This forum, with the theme of "Empowering with Digital Intelligence, Advancing into the Deep Sea", focuses on the key "pain points" in the field of Marine engineering. It conducts in-depth discussions on the sustainable development path of deep-sea exploration and the construction of a maritime power, aiming to promote the coordinated development of the innovation chain and the industrial chain, facilitate the deep integration of industry, academia, research and application, and lead Marine engineering towards intelligence, greenness and unmanned operation. During the forum, the launch ceremony of the journal "Ocean" was held simultaneously. This journal is hosted by Tsinghua University and published by Tsinghua University Press. Institute for Ocean Engineering provides academic support. It is fully independently built and operated based on the SciOpen platform. In the future, it will be committed to building a high-level international academic exchange platform in the field of Marine engineering. At the end of the forum, I made a concluding speech.

    The successful holding of this forum not only consolidated the consensus of multiple parties including industry, academia and research, but also provided an important platform for global scholars to share innovative achievements, and will become a bridge to promote the development of disciplines and the transformation of achievements.

  • 2025-09-29

    2025-09-29

    On September, 2025, the Essential Science Indicators (ESI) database was updated to show that in the internationally renowned journal Environmental Science & Technology (ranked in the first zone of the Chinese Academy of Sciences), The Paper "Fukushima Contaminated Water Risk Factor: Global Implications" published in IF = 11.3 was selected as an ESI Highly Cited Paper.

    In response to the lack of quantification and integration in the risk assessment of the discharge of nuclear-contaminated water from Fukushima into the sea, the research team innovatively proposed the "Fukushima Nuclear-Contaminated Water Risk Factor" (FCWRF). This indicator integrates the three major risks of nuclide diffusion, bioenrichment and global seafood trade, achieving a comprehensive quantitative assessment of risks. Research shows that the combined risk will spread to six continents around the world, and its spread speed is six times faster than that driven by ocean currents. FCWRF Bridges the barriers between different fields of radionuclide risk assessment and provides a scientific basis for formulating global response strategies. Furthermore, the team has released the Fukushima risk visualization website, which dynamically displays the spatiotemporal evolution of FCWRF and makes the data available for download.

    Note: ESI highly cited papers refer to academic papers published in the past ten years and ranked in the top 1% of global citations in the same discipline. They can provide references for cutting-edge research in the discipline and can be used in the scientific research evaluation system.

  • 2025-09-20

    2025-09-20

    On September 20th, marking the 45th anniversary of the founding of the China Graphics Society, the 10th China Graphics Conference officially kicked off in Wuhan, Hubei Province. This conference, themed "Intelligent Computing Symbiosis · Graph Opening a New Chapter", is hosted by the China Graphics Society. The participants, centering on the three main lines of "original software, key equipment, and scene applications", jointly explored new paths for the deep integration and innovative development of graphics and intelligent technologies.

    At the conference, I was honored to be awarded the title of "Outstanding Individual Member" by the China Graphics Society. This honor is an affirmation of my active participation in the society's work and my efforts to promote the development of graphics over the past five years (2021-2025). At the same time, the second meeting of the 8th Editorial Board of the Journal of Graphics was successfully held. I was honored as a dedicated and devoted editorial board member of the Journal of Graphics in 2025 and delivered a speech as a representative of the awardees. These honors are not only encouragement but also motivation.

    This conference lasts for three days and has organized over 40 academic activities, covering various aspects such as cutting-edge forums, technical discussions, and popular science lectures, providing a high-quality platform for communication and cooperation for experts and scholars in the field of graphics.

  • 2025-09-12

    2025-09-12

    Congratulations to Liu Yi on successfully defending his doctoral dissertation at Tsinghua University!

    Liu Yi's paper is titled "Digital Twin-based Multi-scale Marine Environment Simulation and Offshore Engineering Structure Analysis". This research focuses on the problems such as the difficulty in integrating multi-source heterogeneous data, complex model coupling, low computational efficiency, and the lack of collaborative tools in Marine environment and engineering structure analysis. It takes digital twin technology as the core A theoretical and methodological system covering "environmental simulation - structural analysis - platform integration" has been constructed. Based on the theory of complex systems, a digital twin framework coupling cross-scale environmental and structural sub-models was proposed. The coarse-grained Navier-Stokes simulation and large-scale Marine environment calculation methods were developed. A multi-scale simulation model for pollutant diffusion was established, and its effectiveness was verified in the simulation of the discharge of nuclear-contaminated water from Fukushima. In terms of structural analysis, an efficient sparse matrix solution algorithm and a dynamic response order reduction model were proposed. By combining monitoring data with neural networks, mechanical state inversion and stress prediction were achieved (with an accuracy rate of 87.5%). Ultimately, an independent integrated simulation platform was developed, achieving a deep integration of multi-scale environments and structures, providing key technical support for the full life cycle management of Marine engineering and the development of domestic industrial software.

    Note: During his study period, Liu Yi published a total of 10 academic papers (4 of which were indexed by SCI and published in journals such as National Science Review, Ocean Engineering, and Environmental Science & Technology). Five authorized invention patents and two software Copyrights have been obtained, and the achievements have received unanimous praise from experts.