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Trend of Storm Surge Induced by Typical Landfall Super Typhoons During 1975–2021 in the Eastern China Sea

Journal of Ocean University of China 2024年第2期23卷 277-286页

作者： LUO Feng WANG Yi tao aifeng SHI Jian WANG Yongzhi ZHANG Chi College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Nantong Ocean and Coastal Engineering Research Institute Hohai UniversityNantong 226000China Key Laboratory of Ministry of Education for Coastal Disaster and Protection Hohai UniversityNanjing 210098China College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China The First Institute of Oceanography MNRQingdao 266061China

Climate change affects the activity of global and regional tropical cyclones(TCs).Among all TCs,typical super typhoons(STYs)are particularly devastating because they maintain their intensity when landing on the coast and thus cause casualties,economic losses,and environmental damage.Using a 3D tidal model,we reconstructed the typhoon(TY)wind field to simulate the storm surge induced by typical STYs.The TY activity was then analyzed using historical data.Results showed a downtrend of varying degrees in the annual frequency of STYs and TCs in the Western North Pacific(WNP)Basin,with a significant trend change observed for TCs from 1949 to 2021.A large difference in the interannual change in frequency was found between STYs and TCs in the WNP and Eastern China Sea(ECS).Along the coast of EC,the frequency of landfall TCs showed a weak downtrend,and the typical STYs showed reverse micro growth with peak activity in August.Zhejiang,Fujian,and Taiwan were highly vulnerable to the frontal hits of typical STYs.Affected by climate change,the average lifetime maximum intensity(LMI)locations and landfall locations of typical STYs in the ECS basin showed a significant poleward migration trend.In addition,the annual average LMI and accumulated cyclone energy showed an uptrend,indicating the increasing severity of the disaster risk.Affected by the typical STY activity in the ECS,the maximum storm surge area also showed poleward migration,and the coast of North China faced potential growth in high storm surge risks.

关键词： storm surge super typhoons tropical cyclones eastern China Sea poleward migration

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Overview on Mangrove Forest Disaster Prevention and Mitigation Functions

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Journal of Ocean University of China 2024年第1期23卷 46-56页

作者： CHEN Xinping YIN Ziqi LI Zibin WANG Bin tao aifeng GUO Zhixing WANG Fei AN Yanhong O’DRISCOLL Kieran College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210098China National Marine Hazard Mitigation Service Beijing 100194China The People’s Government of Hainan Province Haikou 570204China Hibernian Marine Systems Limited Cork T12EDD8Ireland

This paper provides a comprehensive overview on coastal protection and hazard mitigation by mangroves.Previous stud-ies have made great strides to understand the mechanisms and influencing factors of mangroves’protection function,including wave energy dissipation,storm surge damping,tsunami mitigation,adjustment to sea level rise and wind speed reduction,which are sys-tematically summarized in this study.Moreover,the study analyzes the extensive physical models,based on indoor flume experi-ments and numerical models,that consider the interaction between mangroves and hydrodynamics,to help our understanding of mangrove-hydrodynamic interactions.Additionally,quantitative approaches for valuing coastal protection services provided by man-groves,including index-based and process-resolving approaches,are introduced in detail.Finally,we point out the limitations of previous studies,indicating that efforts are still required for obtaining more long-term field observations during extreme weather events,to create more real mangrove models for physical experiments,and to develop numerical models that consider the flexible properties of mangroves to better predict wave propagation in mangroves having complex morphology and structures.

关键词： mangrove coastal protection disaster prevention and mitigation disaster reduction value coastal resilience

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基于装置得分的北太平洋波浪能资源评估

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中国海洋大学学报（自然科学版） 2024年第7期54卷 63-71页

作者：刘威时健张弛陶爱峰河海大学海岸灾害及防护教育部重点实验室江苏南京210024 自然资源部第四海洋研究所广西北部湾海洋资源环境与可持续发展重点实验室广西北海536000 河海大学港口海岸与近海工程学院江苏南京210024

针对波浪能发电量取决于当地波浪特征和波浪能发电装置,而传统单一的波能流密度评估法则只考虑了地区波浪特性,未结合装置加以分析,评估结果偏向理论的问题,本文利用欧洲中期天气预报中心(European Centre for Medium-Range Weather For... 详细信息

针对波浪能发电量取决于当地波浪特征和波浪能发电装置,而传统单一的波能流密度评估法则只考虑了地区波浪特性,未结合装置加以分析,评估结果偏向理论的问题,本文利用欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts, ECMWF)提供的第五代大气再分析数据集(ECMWF Reanalysis v5, ERA5)中的再分析波浪数据,通过装置得分的波浪能评估方法对北太平洋区域1979—2020年波浪能的空间分布进行了分析。结果表明:在本研究所涉及的地区中,纬度较高的地区波能流密度大且装置得分高,本研究所用评估方法的结论同传统评估方法一致,但在中国南海和部分太平洋纬度较低的地区,发电装置有着较好的连续发电条件,发电效率较高。不同装置间的适配区域也有很大不同,AquaBuoy和Pelamis装置的最佳适用区位于北太平洋纬度较高的地区,而Wave Dragon装置的最佳适用区范围更广,在150°E—160°W之间的纬度较低的地区也表现突出。对于中国南海海域,AquaBuoy装置的适配性最好,而北太平洋纬度较高的地区则最适合布置Pelamis装置,北太平洋纬度中游和较低区域最适合布置Wave Dragon装置。

关键词：第五代大气再分析数据集北太平洋可利用波浪能 AquaBuoy装置 Pelamis装置 Wave Dragon装置

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Swells of the East China Sea

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Journal of Ocean University of China 2017年第4期16卷 674-682页

作者： tao aifeng YAN Jin PEI Ye ZHENG Jinhai MORI Nobuhito Key Laboratory of Coastal Disaster and Defence(Hohai University) Ministry of EducationNanjing 210098P.R.China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098P.R.China Xiangshui Yangtze Wind Power Generation Co. LtdXiangshui 224600P.R.China Disaster Prevention Research Institute Kyoto UniversityGokashoUjiKyoto 611-0011Japan

Over the past few decades,an increasing number of marine activities have been conducted in the East China Sea,including the construction of various marine structures and the passage of large ships.Marine safety issues are paramount and are becoming more important with respect to the likely increase in size of ocean waves in relation to global climate change and associated typhoons.In addition,swells also can be very dangerous because they induce the resonance of floating structures,including ships.This study focuses on an investigation of swells in the East China Sea and uses hindcast data for waves over the past 5 years in a numerical model,WAVEWATCH III(WW3),together with historical climate data.The numerical calculation domain covers the entire North West Pacific.Next,swells are separated and analyzed using simulated wave fields,and both the characteristics and generation mechanisms of swells are investigated.

关键词：东海海洋结构物巨浪全球气候变化海洋活动大型船舶西北太平洋安全问题

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基于江苏海域定点观测资料的双峰谱谱型研究

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海洋学报 2024年第2期46卷 107-116页

作者：杨伊妮陶爱峰曹力玮范骏王岗河海大学海岸灾害及防护教育部重点试验室江苏南京210024 河海大学港口海岸与近海工程学院江苏南京210024 中国电建集团西北勘测设计研究院有限公司陕西西安710065

江苏海域作为全国海上风电重点建设海域,走向远海是未来发展的主趋势,外海开敞海域涌浪成分较多,海浪谱往往以双峰谱的形式出现,因此双峰谱海浪的谱型特征需要进一步深入研究,为海上施工提供参考依据。基于浮标测站2018年全年观测数据,... 详细信息

江苏海域作为全国海上风电重点建设海域,走向远海是未来发展的主趋势,外海开敞海域涌浪成分较多,海浪谱往往以双峰谱的形式出现,因此双峰谱海浪的谱型特征需要进一步深入研究,为海上施工提供参考依据。基于浮标测站2018年全年观测数据,经过异常值检验、双峰谱识别后得到1 223笔双峰谱数据,进而研究江苏海域波浪双峰谱谱型特征,对比不同典型双峰谱谱型并展开实测双峰谱的拟合,提出了修正谱宽参量,探究了修正系数、峰升高因子、谱宽参量间的依赖关系,得到了双峰谱拟合谱型表达式。结果表明:基于北大西洋海域提出Ochi-Hubble谱系及基于挪威海域提出的Torsethaugen谱并不适用于江苏海域双峰谱谱型,本文提出的双峰JONSWAP拟合谱具有自适应性,可以科学合理地描述江苏海域双峰谱谱型,并推广应用于不同风场、地形条件的海域中。

关键词：江苏海域双峰谱 Ochi-Hubble六参数谱 Torsethaugen双峰谱双峰JONSWAP拟合谱

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Complex-frequency waves:beat loss and win sensitivity

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Light(Science & Applications) 2024年第2期13卷 181-183页

作者： Qingqing Cheng tao L School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Department of Respiratory Diseases and Critical Medicine Quzhou Hospital Affiliated to Wenzhou Medical UniversityQuzhou324000China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing210093China

Recent experiments have demonstrated that synthesized complex-frequency waves can impart a virtual gain to molecule sensing systems,which can effectively restore information lost due to intrinsic molecular damping.The enhancement notably amplifies the signal of trace molecular vibrational fingerprints,thereby substantially improving the upper limit of sensitivity.

关键词： thereby Complex limit

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基于多层感知器的风涌浪分离方法

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海洋学报 2023年第2期45卷 1-12页

作者：徐啸陶爱峰韩雪潘锡山杨伊妮河海大学海岸灾害及防护教育部重点实验室江苏南京210024 河海大学港口海岸与近海工程学院江苏南京210024 江苏省海涂研究中心江苏南京210036 江苏省交通运输厅港航事业发展中心江苏南京210004

风涌浪分离是研究风浪、涌浪各自特性的基础,但受限于海浪谱数据的匮乏,基于海浪谱的风涌浪分离方法难以普及应用,有效的解决办法是采用波浪观测中容易获取的基本波要素进行风涌浪分离。现有方法无法利用基本波要素全面计算出风浪、涌... 详细信息

风涌浪分离是研究风浪、涌浪各自特性的基础,但受限于海浪谱数据的匮乏,基于海浪谱的风涌浪分离方法难以普及应用,有效的解决办法是采用波浪观测中容易获取的基本波要素进行风涌浪分离。现有方法无法利用基本波要素全面计算出风浪、涌浪的比例及其特征参数,为此本文将机器学习引入到风涌浪分离中,以多层感知器模型为基础,提出了一种利用基本波要素、风要素准确计算出风涌浪参数的方法。该方法需要每个测站提供至少466笔、建议766笔及以上的实测波浪数据作为训练样本,适用于台湾海峡3个测站,在计算精度上显著优于基于海浪频谱的传统风涌浪分离方法,可为本海域缺乏海浪谱的测站提供替代性的风涌浪计算方案,有助于扩大实测风涌浪资料的来源,进而加强风涌浪分布特性以及预警预报研究。

关键词：风涌浪分离台湾海峡机器学习涌浪风浪

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Pre-combustion mercury removal with co-production of hydrogen via coal electrolysis

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Journal of Environmental Sciences 2024年第2期136卷 382-389页

作者： Xiang Lyu Runming tao Tianyu Zhang Chemical and Biomolecular Engineering Department Ohio University165 Stocker CenterAthensOH45701USA Electrification and Energy Infrastructures Division Oak Ridge National LaboratoryOak RidgeTN37831USA Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Engineering Research Center for Water Pollution Source Control&Eco-remediation College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China

Pre-combustion mercury removal via coal electrolysis was performed and investigated on a bench-scale coal electrolytic cell(CEC)systemically,and factorial design was used to determine the effect of different operating conditions(coal particle size,operating temperature,operating cell voltage,and flow rate of slurry)on the percentage of mercury removal,percentage of ash removal,and dry heating value change.The results showed that the operating cell voltage,as well as the interaction between operating cell voltage and coal particle size,are significant factors in the percentage of mercury removal.There is no significant factor in the percentage of ash removal and the dry heating value change,but the coal could be purified while keeping the dry heating value almost constant after electrolysis.A co-product of hydrogen could be produced during coal electrolysis with 50%lower energy consumption compared with water electrolysis.Meanwhile,a mechanism for mercury removal in coal was proposed.The facts indicate that coal electrolysis is a promising method for precombustion mercury removal.

关键词： Pre-combustion mercury removal Coal electrolysis Ash removal Dry heating value Hydrogen production

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A Global Optimality Principle for Fully Coupled Mean-field Control Systems

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 379-413页

作者： tao HAO School of Statistics and Mathematics Shandong University of Finance and EconomicsJinan 250014China

This paper concerns a global optimality principle for fully coupled mean-field control systems.Both the first-order and the second-order variational equations are fully coupled mean-field linear FBSDEs. A new linear relation is introduced, with which we successfully decouple the fully coupled first-order variational equations. We give a new second-order expansion of Y^(ε) that can work well in mean-field framework. Based on this result, the stochastic maximum principle is proved. The comparison with the stochastic maximum principle for controlled mean-field stochastic differential equations is supplied.

关键词： optimal control global maximum principle fully coupled general mean-field FBSDE adjoint equation recursive utility

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Localization of q-form fields on a de Sitter brane in chameleon gravity

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Frontiers of physics 2024年第3期19卷 11-18页

作者： Yi Zhong tao-tao Sui School of Physics and Electronics Science Hunan UniversityChangsha 410082China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory of Quantum Theory and Applications of MoELanzhou UniversityLanzhou 730000China College of Physics Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Recently,it was found that the vector field can be naturally localized on the thick brane in chameleon gravity.In this work,we extend this study to encompass de Sitter brane scenario.We focus on the localization of q-form fields.The scalar and vector fields can be localized on the de Sitter brane,while the KR field cannot be localized.The condition for localization of the scalar and vector fields is obtained.Furthermore,we investigate the localization characteristics in two examples with given conformal factor b(ϕ).In the first case,the effective potentials and KK modes of the matter fields are obtained asymmetric even though the de Sitter brane has Z2 symmetry.In the second case,volcano-like effective potentials are generated in the de Sitter brane model.

关键词： brane q-form field chameleon gravity

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