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Dramatical hydro-sedimentary changes induced by bamboo fences over mangrove tidal flat of the largest delta in Beibu Gulf, southwestern China

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Acta Oceanologica Sinica 2023年第7期42卷 103-115页

作者： zuming huang Zhijun Dai Riming Wang Xiaoyan Zhou Wenhong Pang Jiejun Luo Bingbin Feng Baoqing Hu Guangxi Key Laboratory of Marine Environmental Change and Disaster in Beibu Gulf Qinzhou 535011China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200062China Key Laboratory of Coastal Science and Engineering/Qinzhou Key Laboratory for Eco-Restoration of Environment Beibu Gulf UniversityGuangxi 535011China Key Laboratory of Environment Change and Resources Use in Beibu Gulf(Nanning Normal University) Ministry of EducationNanning 530001China

Mangrove forest is one of the most important ecological and environmental resources by effectively promoting tidal flat deposition and preventing the coastal region from ***,there have been mass loss of mangrove forests due to anthropogenic *** is an urgent need to explore an effective way for mangrove ***,three rows of bamboo fences with hydro-sedimentary observation set over Aegiceras corniculatum mangrove tidal flat of the Nanliu Delta,the largest delta of Beibu Gulf,China,were conducted to analyze the hydro-sedimentary variations induced by bamboo *** identified that the mean horizontal velocity Um per burst(20 min)decreased by as much as 71%and 40%in comparison with those without bamboo fences in March and November,respectively,when the tidal current entering the bamboo area during *** maximum of mean horizontal flow velocity Um-max at bamboo area was 50%–75%of that without bamboo fences during ebb *** suspended sediment concentration of bamboo area suggested a maximum reduction of 57%relative to bare flat during flood,and was 80%lower than bare flat at ebb ***,the turbulent kinetic dissipationεat flood tide was significantly higher than that at ebb tide,while the bamboo fences greatly increased the turbulent kinetic dissipationεby 2 to 5 times relative to bare flat,resulting in an increase of the bed elevation by inhibiting the sediment incipient motion and intercepting suspended *** siltation rate at the bamboo area was 140%and 29.3%higher than that at the bare flat and the region covered with ***,*** results highlight that bamboo fences can effectively attenuate tidal current and thus promote siltation over mangrove flat,which contribute great benefit to mangrove survival.

关键词： mangrove tidal flat bamboo fences hydro-sedimentary process bed siltation

Practical Synthesis of Valbenazine via 1,3-Dipolar Cycloaddition

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Chinese Journal of Chemistry 2024年第8期42卷 841-845页

作者： Yalan Peng zuming Lin Lili Zhu Shiqing Han Sha-Hua huang Ran Hong College of Biotechnology and Pharmaceutical Engineering Nanjing Tech UniversityNanjingJiangsu211816 China School of Environmental and Chemical Engineering Shanghai Institute of TechnologyShanghai201418 China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032 China Innovation Research Institute of Traditional Chinese Medicine(IRI) Shanghai University of Traditional Chinese Medicine1200 Cailun RoadShanghai201203 China

Comprehensive Summary,Valbenazine(Ingrezza),a potent and highly selective inhibitor of vesicular monoamine transporter type 2(VMAT2)through the active metabolite hydrotetrabenazine(HTBZ),has been approved for the treatment of tardive dyskinesia and,very recently,for chorea,which is associated with Huntington's *** numerous synthetic efforts dedicated to the synthesis of HTBZ,the industrial preparation of valbenazine uses dihydroisoquinoline as a starting material and the chiral resolution of racemic HTBZ derived from ketone ***,we present a practical synthesis of HTBZ and valbenazine featuring a highly stereoselective 1,3-dipolar cycloaddition and enzymatic kinetic *** cascade process includes cycloaddition,N—O bond cleavage,and lactamization,which proved to be operationally *** allure of the enzymatic resolution developed in this work offers a rapid access toward affording tetrahydroisoquinoline(THIQ)-fused piperidine in the production of medically significant compounds,such as yohimbine and reserpine.

关键词： Cycloaddition Chemoenzymatic Kinetic resolution Prodrugs VMAT2 inhibitor

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基于探地雷达的钢筋锈蚀检测机理

深圳大学学报（理工版） 2023年第4期40卷 463-469页

作者：洪舒贤黄祖铭陈鼎重董必钦深圳大学土木与交通工程学院广东省滨海土木工程耐久性重点实验室广东深圳518060

为解析探地雷达对钢筋锈蚀的检测机理,采用探地雷达对钢筋加速锈蚀过程进行连续监测,通过设计不同试验工况,分解锈胀裂缝宽度以及锈蚀产物扩散等不同锈蚀劣化模式对探地雷达信号的影响.结果表明,在锈胀裂缝出现前,反射波振幅随着加速锈... 详细信息

为解析探地雷达对钢筋锈蚀的检测机理,采用探地雷达对钢筋加速锈蚀过程进行连续监测,通过设计不同试验工况,分解锈胀裂缝宽度以及锈蚀产物扩散等不同锈蚀劣化模式对探地雷达信号的影响.结果表明,在锈胀裂缝出现前,反射波振幅随着加速锈蚀不断增大;在锈胀裂缝出现后,反射波振幅随着锈胀裂缝宽度的增大而减小;反射波振幅随着竖向锈胀裂缝中锈蚀产物填充量的增加而增大.研究可为分析探地雷达信号与钢筋锈蚀之间的关系提供借鉴.

关键词：钢筋混凝土无损检测探地雷达钢筋锈蚀检测锈胀裂缝定期监测

桐花树红树林潮滩近底层悬沙浓度垂向剖面变化特征分析

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热带海洋学报 2022年第4期41卷 38-50页

作者：黄祖明周晓妍戴志军车志伟华东师范大学河口海岸学国家重点实验室上海200241 国家海洋局海口海洋环境监测中心站海南海口570100

观测红树林潮滩在波浪和潮流作用下的近底层垂向剖面悬沙浓度变化过程,对理解海岸带植被的消能促淤机制和滨海湿地生态修复工程有着重要作用。本文以北部湾七星岛岛尾桐花树红树林潮滩为例,基于剖面流速仪HR、声学多普勒单点流速仪ADV... 详细信息

观测红树林潮滩在波浪和潮流作用下的近底层垂向剖面悬沙浓度变化过程,对理解海岸带植被的消能促淤机制和滨海湿地生态修复工程有着重要作用。本文以北部湾七星岛岛尾桐花树红树林潮滩为例,基于剖面流速仪HR、声学多普勒单点流速仪ADV、浪潮仪T-wave及剖面浊度仪ASM,获取了研究区域2019年夏季大潮连续3天的水文数据,同时结合桐花树典型植株实测参数,分析了潮周期内红树林潮滩近底层垂向剖面悬沙响应波浪、潮流作用及桐花树空间结构的运动过程。结果表明:1)桐花树潮滩近底层悬沙浓度和悬沙通量具有涨潮明显大于落潮的潮汐不对称现象,剖面垂向高悬沙浓度区域在涨潮初期—涨急由距底部0.1~0.37m转变为距底部0.5~0.67m,落急—落潮末期则由上部转变为下部;2)潮周期内悬沙起动和再悬浮阶段发生在以波浪作用主导的涨潮初期和落潮末期,平流和沉降发生在以潮流作用为主的涨急至落急整个阶段;3)涨潮阶段桐花树冠层的茂密枝叶通过减缓流速拦截多于冠层上部40%以上的悬沙,落潮水体则挟沙自陆向海经过桐花树群落,使得悬沙浓度下降超过71%。该不对称涨、落潮动力沉积机制有利于悬沙向岸输运,促进潮滩扩张过程。

关键词：桐花树空间结构近底层剖面悬沙浓度波流作用

A thermodynamic perspective on electrode poisoning in solid oxide fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1449-1455页

作者： Kevin huang Department of Mechanical Engineering University of South CarolinaColumbiaUSA

A critical challenge to the commercialization of clean and high-efficiency solid oxide fuel cell(SOFC)technology is the insuf-ficient stack lifespan caused by a variety of degradation mechanisms,which are associated with cell components and chemical *** components related degradation refers to thermal/chemical/electrochemical deterioration of cell materials under operating conditions,whereas the latter regards impurities in feedstocks of oxidant(air)and reductant(fuel).This article provides a thermodynamic perspective on the understanding of the impurities-induced degradation mechanisms in *** discussion focuses on using thermodynamic ana-lysis to elucidate poisoning mechanisms in cathodes by impurity species such as Cr,CO_(2),H_(2)O,and SO_(2) and in the anode by species such as S(or H_(2)S),SiO_(2),and P_(2)(or PH_(3)).The author hopes the presented fundamental insights can provide a theoretical foundation for search-ing for better technical solutions to address the critical degradation challenges.

关键词： impurities air fuel reaction activity

Distributed Nash Equilibrium Seeking on Compact Action Sets over Jointly Strongly Connected Switching Networks

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Journal of Systems Science & Complexity 2024年第1期37卷 63-81页

作者： HE Xiongnan huang Jie Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong Kong 999077China.

This paper studies the distributed Nash equilibrium seeking(DNES)problem for games whose action sets are compact and whose network graph is switching satisfying the jointly strongly connected *** keep the actions of all players in their action sets all the time,one has to resort to the projected gradient-based *** the assumption that the unique Nash equilibrium is the unique equilibrium of the pseudogradient system,an algorithm is proposed that is able to exponentially find the Nash ***,the authors also consider the distributed Nash equilibrium seeking problem for games whose actions are governed by high-order integrator dynamics and belong to some compact *** examples are used to illustrate the proposed approach.

关键词： Compact action sets jointly strongly connected switching graphs Nash equilibrium seeking projected gradient-based algorithm.

Design and pricing of maintenance service contract based on Nash non-cooperative game approach

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Journal of Systems Engineering and Electronics 2024年第1期35卷 118-129页

作者： SU Chun huang Kui School of Mechanical Engineering Southeast UniversityNanjing 211189China

Nowadays manufacturers are facing fierce *** from the products,providing customers with multiple maintenance options in the service contract becomes more popular,since it can help to improve customer satisfaction,and ultimately promote sales and maximize profit for the *** considering the combinations of corrective maintenance and preventive maintenance,totally three types of maintenance service contracts are ***,attractive incentive and penalty mechanisms are adopted in the *** this basis,Nash non-cooperative game is applied to analyze the revenue for both the manufacturer and customers,and so as to optimize the pricing mechanism of maintenance service contract and achieve a win-win *** experiments are *** results show that by taking into account the incentive and penalty mechanisms,the revenue can be improved for both the customers and ***,with the increase of repair rate and improvement factor in the preventive maintenance,the revenue will increase gradually for both the parties.

关键词： maintenance service contract Nash game incentive and penalty mechanism corrective maintenance preventive maintenance

Quantitative phase imaging based on holography:trends and new perspectives

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Light(Science & Applications) 2024年第7期13卷 1235-1277页

作者： Zhengzhong huang Liangcai Cao Department of Precision Instrument Tsinghua UniversityBeijing 100084China

In 1948,Dennis Gabor proposed the concept of holography,providing a pioneering solution to a quantitative description of the optical *** 75 years of development,holographic imaging has become a powerful tool for optical wavefront measurement and quantitative phase *** emergence of this technology has given fresh energy to physics,biology,and materials *** holography(DH)possesses the quantitative advantages of wide-field,non-contact,precise,and dynamic measurement capability for *** has unique capabilities for the propagation of optical fields by measuring light scattering with phase *** offers quantitative visualization of the refractive index and thickness distribution of weak absorption samples,which plays a vital role in the pathophysiology of various diseases and the characterization of various *** provides a possibility to bridge the gap between the imaging and scattering *** propagation of wavefront is described by the complex *** complex-value in the complex-domain is reconstructed from the intensityvalue measurement by camera in the ***,we regard the process of holographic recording and reconstruction as a transformation between complex-domain and real-domain,and discuss the mathematics and physical principles of *** review the DH in underlying principles,technical approaches,and the breadth of *** conclude with emerging challenges and opportunities based on combining holographic imaging with other methodologies that expand the scope and utility of holographic imaging even *** multidisciplinary nature brings technology and application experts together in label-free cell biology,analytical chemistry,clinical sciences,wavefront sensing,and semiconductor production.

关键词： holographic phase precise

Identification of Linear Systems Using Binary Sensors with Random Thresholds

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Journal of Systems Science & Complexity 2024年第3期37卷 907-923页

作者： huang Zhiyong SONG Qijiang School of Mathematics Renmin University of ChinaBeijing 100872China School of Mathematics Sino-French InstituteRenmin University of ChinaBeijing 100872China

In this paper,the problem of identifying autoregressive-moving-average systems under random threshold binary-valued output measurements is *** the help of stochastic approximation algorithms with expanding truncations,the authors give the recursive estimates for the parameters of both the linear system and the binary *** reasonable conditions,all constructed estimates are proved to be convergent to the true values with probability one,and the convergence rates are also established.A simulation example is provided to justify the theoretical results.

关键词： α-mixing binary sensor quantized system stochastic approximation stochastic thresh-old strongly consistent system identification