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Dynamic co.pling Analysis of Semisubmersible Platform Float-over Method for Docking Case

Journal of Ocean University of China 2024年第2期23卷 345-357页

作者： DING Hongyan QIN Licheng ZHANG Puyang SONG Zhengrong XIE Weiwei State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Offshore Oil Engineering co. Ltd.Tianjin 300461China

In this paper,the multi-body co.pled dynamic characteristics of a semisubmersible platform and an HYSY 229 barge were ***,co.pled hydrodynamic analysis of the HYSY 229 barge and the semisubmersible platform was *** hydrodynamic parameters were obtained using the retardation function method of three-dimensional frequency-domain potential flow *** results of the hydrodynamic analysis were highly co.sistent with the test findings,verifying the accuracy of the multifloating hydrodynamic co.pling analysis,and key hydrodynamic parameters were solved for different water depths and the co.pling *** to the obtained results,the hydrodynamic influence was the largest in shallow waters when the co.pling effect was ***,the co.pled motion equation co.bined with visco.s damping,fender system,and mooring system was established,and the hydrodynamics,floating body motion,and dynamic response of the fender system were *** analysis revealed good agreement among the surge,sway,and yaw motions of the two floating ***,when the wave period reached 10 s,the motion of the two floating bodies showed severe shock,and a relative motion was also ***,excessive co.straints should be added between the two floating bodies during co.struction to ensure co.struction *** numerical analysis and model test results of the semisubmersible platform and HYSY 229 barge at a water depth of 42 m and sea co.ditions of 0°,45°,and 90° were in good agreement,and the error was less than 5%.The maximum movement of the HYSY 229 barge reached 2.61 m in the sway direction,whereas that of the semisubmersible platform was 2.11 *** co.struction,excessive co.straints should be added between the two floating bodies to limit their relative movement and ensure co.struction safety.

关键词： float-over method semisubmersible platform co.pling hydrodynamic fender system time-domain analysis

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Effects of Biostimulation-Bioaugmentation on co.stal Microbial co.munity in an in situ Mesoco.m System

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Journal of Ocean University of China 2024年第1期23卷 233-246页

作者： YUAN Fangzheng ZHAO Yangyong DAI Yulai YANG Wen ZHU Jinyong co.lege of Marine Science Ningbo UniversityNingbo 315800China Zhejiang Easytest Environmental Technology co. Ltd.Ningbo 315800China Hangzhou Academy of Agricultural Sciences Hangzhou 310024China

Globally,various types of pollution affect co.stal waters as a result of human *** and biostimulation are effective methods for treating water ***,few studies have explored the response of co.stal prokaryotic and eukaryotic co.munities to bioaugmentation and ***,a 28-day outdoor mesoco.m experiment with two treatments(bioaugmentation-A and co.bined treatment of bioaugmentation and biostimulation-AS)and a co.trol(untreated-C)were carried *** experiment was co.ducted in Meishan Bay to explore the co.position,dynamics,and co.occurrence patterns of prokaryotic and eukaryotic co.munities in response to the A and AS using 16S rRNA and 18S rRNA gene amplico. *** treatment,Gammaproteobacteria and Epsilonproteobacteria were significantly increased in group AS co.pared to group C,while Flavobacteriia and Saprospirae were significantly *** was significantly reduced in AS co.pared to C,while Chrysophyta was significantly reduced in both AS and *** to C,the principal response curve analyses of the prokaryotic and eukaryotic co.munities both showed an increasing trend followed by a decreasing trend for ***,the trends of prokaryotic and eukaryotic co.munities in group A were similar to those in group AS co.pared with group C,but AS changed them more than A *** to the species weight table on principal response curves,a significant increase was observed in beneficial bacteria in prokaryotic co.munities,such as Rhodobacterales and Oceanospirillales,along with a decrease in autotrophs in eukaryotic co.munities,such as Chrysophyta and *** properties of network analysis reveal that A and AS co.plicate the interactions between the prokaryotic and eukaryotic ***,these findings expand our understanding of the response pattern of the bioaugmentation and biostimulation on co.stal prokaryotic and eukaryotic co.munities.

关键词： prokaryotic co.munity eukaryotic co.munity bioaugmentation biostimulation co.stal waters

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co.tributors to tidal duration asymmetry with varied co.stline co.figurations on western shelf of Yellow Sea

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Water Science and Engineering 2024年第1期17卷 1-12页

作者： Xi Feng Zheng Li Hui Feng Jia-yan Yang Shou-peng Xie Wei-bing Feng co.lege of Harbor.co.stal and Offshore Engineering Hohai UniversityNanjing 210098China China Harbour Engineering co. LtdBeijing 100027China Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of CommunicationsNanjing 210029China China South-to-North Water Diversion co.poration Limited Beijing 100036China

co.stal management in China is co.fronted with an urgent choice between natural restoration and maintenance of existing seawalls and reclaimed land for eco.omic development.A key criterion for making this decision is the resilience to co.stal flooding,which depends on the ability to predict tidal *** duration asymmetry(TDA)is a key parameter in determination of the arrival and duration of flood *** study selected the western inner shelf of the Yellow Sea(WYS)as the study area and investigated the responses of TDA to different shoreline co.figurations and relative sea level *** responses of TDA to shoreline reco.struction yielded spatial variability locally and *** the nearshore area,the responses of TDA to the co.plex ocean environment mainly originated from the co.bined functions of reflection,bottom friction,and advection,which co.trolled the energy transfer from M2 or S2 co.stituents to their overtides or co.pound *** sensitivity of TDA to co.stline typologies was not limited to co.stal waters but co.ld stretch over the entire inner *** vulnerability of tidal responses was due to the displacement of the M2 amphidrome of the Kelvin wave on the WYS,which in turn changed tidal energy fluxes over the *** relative sea level rise co.ld intensify the feedback of TDA to seawalls and land reclamation.

关键词： Tidal duration asymmetry Western inner shelf of Yellow Sea Natural restoration Relative sea level rise Tidal amphidrome

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Agricultural drought vulnerability in the middle reaches of Yangtze River Basin under environmental change

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Journal of Earth Science 2024年

作者： Peng Yang Fei Xu Jun Xia Jiang Li Libo Zhou Cai Fu State Key Laboratory of Hydroscience and Engineering， Tsinghua University School of Geography and Information Engineering， China University of Geosciences Information Center of Department of Natural Resources of Hubei Province School of Water Resources and Hydropower Engineering， Wuhan University Wuhan C-Geo Clouds Science and Tech co.， Ltd

Climate change and eco.omic development impact the population expansion and water shortage in the middle reaches of the Yangtze River Basin (MYRB)， leading directly to drought aggravation-expansion and impacting agricultural production in the MYRB. Therefore， this study quantitatively evaluated agricultural drought vulnerability in the MYRB based on the variable fuzzy evaluation model (VFEM). The main co.clusions are as follows: (1) The arable land in the MYRB gradually decreased between 2005 and 2020， whereas the forest co.er decreased and then increased; (2) precipitation and evapotranspiration were the key factors affecting the agricultural drought vulnerability (e.g.， weights of 0.24 and 0.21)， whereas arable land density and gross domestic product (GDP) per capita played less significant roles; and (3) the agricultural drought vulnerability in the MYRB during 2005–2020 was mainly at level 3 and below， with higher drought vulnerability in the western and northern regions， which had a higher drought risk potential.

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Simple and robust differentiation of Ganoderma species by high performance thin-layer chromatography co.pled with single quadrupole mass spectrometry QDa

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Chinese Journal of Natural Medicines 2021年第4期19卷 295-304页

作者： YAO Shuai ZHANG Jian-Qing HOU Jin-Jun HU Xiao-Su WANG Ling DA Juan RAO Wei WANG Dan-Dan HUANG Yong WU Wan-Ying GUO De-An Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China waters Technology(Shanghai)co. Ltd.Shanghai 201203China

In this study,a high performance thin-layer chromatography/single quadrupole mass spectrometry QDa(HPTLC-QDa)method for robust authentication of Ganoderma lucidum,a popular and valuable herbal medicine,has been *** method is simple and practical,which allows direct generation of characteristic mass spectra from the HPTLC plates automatically with the application of in situ solvent desorption *** HPTLC silica gel plates were developed with toluene-ethyl formate-formic acid(5:5:0.2,V/V)and all bands were transferred to QDa system directly in situ using 80%methanol with 0.1%formic acid as desorption *** acquired HPTLC-QDa spectra showed that luminous yellow band b3,co.taining ganoderic acid B/G/H and ganodeneric acid B,the major active co.ponents of Ganoderma,co.ld be found only in *** and ***(Antler-shaped),but not in *** and ***,bands b13 and b14 with m/z 475/477 and m/z 475/491/495,respectively,co.ld be detected in ***(Antler-shaped),but not in ***,thus allowing simple and robust authentication of *** with co.fused *** method is proved to be simple,practical and reproducible,which can be extended to analyze other herbal medicines.

关键词： High performance thin-layer chromatography Mass spectrometry QDa Ganoderma Authentication

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基于实际预压载作业的自升式平台环境载荷图谱绘制新思路

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哈尔滨工程大学学报（英文版） 2024年第1期23卷 209-221页

作者：孙承猛林海花张志刚孙洪源周立师 Naval Architecture and Port Engineering co.lege Shandong Jiao Tong UniversityWeihai 264209China School of Ocean Engineering Harbin Institute of TechnologyWeihai 264209China China Merchants Jinling Shipyard(Weihai)co. Ltd.Weihai 264207China

The environmental load chart is an important technical support required for the jack-up drilling platform to facilitate its adaptation to different operating waters and ensure the safety of *** chart is a crucial part of the platform operation *** chart data are closely related to external factors such as water depth,wind,wave,and current co.ditions of the working water,as well as to the structural characteristics of the platform itself and the number of variable *** study examines the platform state under extreme wind,wave,and current co.ditions during *** addition,this study focuses on the difference between the ultimate reaction force of the pile leg during preloading and the reaction force of the pile leg without co.sidering any environmental load before ***,the relationship between the difference and the new reaction force of the pile leg caused by the co.bination of different environmental co.ditions is established to facilitate the co.struction of a new form of environmental load *** newly formed chart is flexible and simple;thus,it can be used to evaluate the environmental adaptability of the platform in the target well location and provides the preloading target demand or variable load limit acco.ding to the given environmental ***,the platform can perform personalized preloading operations,thereby improving its capability to co.e with co.plex geological co.ditions,such as reducing punch-through *** co.dition reduces the load on jacking system devices and increases its service life.

关键词： Jack-up Environmental load chart Preloading Geometrically nonlinear effect Punch through

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Ru(III) catalyzed permanganate oxidation of aniline at environmentally relevant pH

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Journal of Environmental Sciences 2014年第7期26卷 1395-1402页

作者： Jing Zhang Ying Zhang Hui Wang Xiaohong Guan State Key Lab of Urban Water Resource and Environment Harbin Institute of Technology Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education College of Environment Hohai University CSCEC AEco. co.sultants co. Ltd. waters co. State Key Laboratory of Pollution co.trol and Resources Reuse College of Environmental Science and Engineering Tongji University

Ru（Ⅲ） was employed as catalyst for aniline oxidation by permanganate at environmentally relevant pH for the first time. Ru（Ⅲ） co.ld significantly improve the oxidation rate of aniline by 5-24 times with its co.centration increasing from 2.5 to 15 μmol/L. The reaction of Ru（Ⅲ） catalyzed permanganate oxidation of aniline was first-order with respect to aniline, permanganate and Ru（Ⅲ）, respectively. Thus the oxidation kinetics can be described by a third-order rate law. Aniline degradation by Ru（Ⅲ） catalyzed permanganate oxidation was markedly influenced by pH, and the seco.d-order rate co.stant （ktapp） decreased from 643.20 to 2.67 （mol/L）^-1 sec^-1 with increasing pH from 4.0 to 9.0, which was possibly due to the decrease of permanganate oxidation potential with increasing pH. In both the uncatalytic and catalytic permanganate oxidation, six byproducts of aniline were identified in UPLC-MS/MS analysis. Ru（Ⅲ）, as an electron shuttle, was oxidized by permanganate to Ru（Ⅵ） and Ru（Ⅶ）, which acted the co.oxidants for deco.position of aniline. Although Ru（Ⅲ） co.ld catalyze permanganate oxidation of aniline effectively, dosing homogeneous Ru（Ⅲ） into water would lead to a seco.d pollution. Therefore, efforts would be made to investigate the catalytic performance of supported Ru（Ⅲ） toward permanganate oxidation in our future study.

关键词： RutheniumCatalysisAnilineByproductElectron shuttle

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Rapid Profiling and Characterization of the Multico.ponents from the Root and Rhizome of Salvia miltiorrhiza by Ultra-High Performance Liquid Chromatography/Ion Mobility-Quadrupole Time-of-Flight Mass Spectrometry in co.bination with co.putational Peak Annotation Workflows

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Phyton-International Journal of Experimental Botany 2022年第5期91卷 1073-1088页

作者： Boxue Chen Hongda Wang Meiyu Liu Wandi Hu Yuexin Qian Jiali Wang Jie Liu Xue Li Jing Wang Wenzhi Yang State Key Laboratory of co.ponent-Based Chinese Medicine&Tianjin Key Laboratory of TCM Chemistry and Analysis Tianjin University of Traditional Chinese MedicineTianjin301617China waters Technology co. Ltd.Beijing101102China

Herbal co.ponents characterization represents a challenging task because of the co.existing of multiple classes of naturally occurring co.pounds with wide spans of polarity,molecular mass,and the ubiquitous *** root and rhizome of Salvia miltiorrhiza have been utilized as a reputable traditional Chinese medicine Salviae Miltiorrhizae Radix et Rhizoma(Dan-Shen)in the treatment of cardiovascular ***,a dimensionenhanced ultra-high performance liquid chromatography/ion mobility/quadrupole time-of-flight mass spectrometry approach in co.bination with intelligent peak annotation workflows was established aimed to rapidly characterize the multico.ponents from *** to the sufficient optimization,satisfactory chromatography separation was enabled on an HSS T3 co.umn within 33 min using 0.1%formic acid in water(A)and acetonitrile(B)as the mobile phase,while the data-independent HDMS^(E) in both the negative and positive electrospray ionization modes was utilized for the high-co.erage MS^(2) data *** automatic peak annotation by searching an in-house library(reco.ding 198 known co.pounds)followed by the subsequent co.firming steps(e.g.,co.parison with the reference co.pounds,fragmentation pathways analysis,and retention behavior co.parison,etc.),allowed us to identify or tentatively characterize a total of 86 co.ponents(including 50 terpenoids,21 phenolic acids,and 15 others)from ***,three-dimensional structure information,such as the retention time,MS^(1) and MS^(2) data,and co.lision cross section(CCS),was provided,which can facilitate the more reliable characterization of herbal co.ponents.

关键词： Ultra-high perform liquid chromatography/ion mobility/quadrupole time-of-flight mass spectrometry highdefinition MS^(E) automatic peak annotation Salvia miltiorrhiza phenolic acid tanshinone

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Development and Application of Oil-Spill Risk Assessment Model for Offshore Pipeline

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Journal of Ocean University of China 2014年第3期13卷 415-420页

作者： LU Yan WANG Jia WEI Wenpu YANG Yong AN Wei China Offshore Environment Services co. Ltd. co.lege of Chemistry and Chemical Engineering Ocean University of China China National Offshore Oil co.

To the potential oil-spill risk caused by offshore pipeline more attention has been paid after the Dalian oil spill incident from oil-pipeline explosion. Since then an issue about how to prevent and co.trol the sudden oil-spill from the offshore pipeline has been raised. In this paper, we proposed an optimized model to analyze the main causes(probability) of spill and the co.sequence with the fuzzy co.prehensive assessment model. co.sidering the co.plicated assessment process for oil-spill, the assessment factor system involving the spill probability and co.sequence was established based on the operative manual and statistic leakage/damage data of offshore pipeline in order to estimate the integrated spill risk sco.e automatically. The evaluated factors of spill probability co.ld be grouped into five aspects: co.rosion, fatigue, national damage, third party, and operational fault; the co.sequence evaluated factors of spill included hazard of oil and impact-co.trolling capability. With some modifications based on experts' opinions, each of the evaluated factors in our work was developed with a relative weight and evaluation criterion. A test example for an offshore pipeline in the Bohai waters was described to show how the model can be used for an actual case in more detail. By using the oil-spill risk assessment model, it is easy to determine the risk level associated with the ongoing activity and management level and hence to take the risk mitigation action immediately.

关键词： oil spill risk assessment spill probability spill co.sequence fuzzy co.prehensive assessment model offshore pipeline

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Dimension-Enhanced Ultra-High Performance Liquid Chromatography/Ion Mobility-Quadrupole Time-of-Flight Mass Spectrometry co.bined with Intelligent Peak Annotation for the Rapid Characterization of the Multiple co.ponents from Seeds of Descurainia sophia

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Phyton-International Journal of Experimental Botany 2022年第3期91卷 541-567页

作者： Simiao Wang Xue Li Boxue Chen Shitong Li Jiali Wang Jing Wang Mingshuo Yang Xiaoyan Xu Hongda Wang Wenzhi Yang State Key Laboratory of co.ponent-Based Chinese Medicine Tianjin Key Laboratory of TCM Chemistry and AnalysisTianjin University of Traditional Chinese MedicineTianjin301617China waters Technology co. Ltd.Beijing101102China School of co.puting Science University of GlasgowGlasgowG128RZUK

The co.plex co.position of herbal metabolites necessitates the development of powerful analytical techniques aimed to identify the bioactive *** seeds of Descurainia sophia(SDS)are utilized in China as a co.gh and asthma relieving ***,a dimension-enhanced integral approach,by co.bining ultra-high performance liquid chromatography/ion mobility-quadrupole time-of-flight mass spectrometry(UHPLC/IMQTOF-MS)and intelligent peak annotation,was developed to rapidly characterize the multico.ponents from *** chromatographic separation was achieved within 38 min on a UPLC CSH C18(2.1×100 mm,1.7μm)co.umn which was eluted by 0.1%formic acid in water(water phase)and acetonitrile(organic phase).co.lision-induced dissociation-MS^(2)data were acquired by the data-independent high-definition MS^(E)(HDMS^(E))in both the negative and positive electrospray ionization modes.A major co.ponents knockout strategy was applied to improve the characterization of those minor ingredients by enhancing the injection ***,a self-built chemistry library was established,which co.ld be matched by the UNIFI software enabling automatic peak annotation of the obtained HDMS^(E)*** a result of applying the intelligent peak annotation workflows and further co.firmation process,a total of 53 co.pounds were identified or tentatively characterized from the SDS,including 29 flavonoids,one uridine derivative,four gluco.ides,one lignin,one phenolic co.pound,and 17 ***,four-dimensional information related to the structure(e.g.,retention time,co.lision cross section,MS^(1)and MS^(2)data)was obtained for each co.ponent by the developed integral approach,and the results would greatly benefit the quality co.trol of SDS.

关键词： Descurainia sophia multico.ponent characterization ultra-high performance liquid chromatography ion mobility/quadrupole time-of-flight mass spectrometry high-definition MS^(E) flavonoid

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