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Responses of macrobenthic communities to patchy distributions of heavy metals and petroleum hydrocarbons in sediments:A study in China's Zhoushan Archipelago

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Acta Oceanologica Sinica 2021年第9期40卷 117-125页

作者： Yanbin Tang Qiang Liu Yibo Liao Konglin Zhou lu shou Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Institute of Oceanography Minjiang UniversityFuzhou 350108China

This study conducted four cruises during 2014–2017 to investigate relationships between macrobenthic communities and sediment contaminations in sea area around the Zhoushan *** sites were categorized into three groups:high total heavy metal contamination content(HHMC),high total petroleum hydrocarbon content(HTPH),and low content ratio of heavy metal contamination content to total petroleum hydrocarbon content(HMC/TPH)*** main taxa of macrofauna(polychaetes,bivalves,gastropods,and crustaceans)were determined to respond to environmental factors *** tolerant polychaetes being the minimal impact by environmental factors,bivalves were threated by heavy metal pollutions in ***,body size distribution frequency demonstrated that macrofauna in the low HMC/TPH areas were less disturbed by contamination than those in the HHMC and HTPH *** result represented the presentation of sensitive species while tolerant species are usually considered as small size ***,this study confirmed the hypothesis that the contamination levels of small-scale patches is indicated by the condition of macrobenthic communities.

关键词： macrobenthos heavy metal petroleum hydrocarbon contaminant effect Zhoushan Archipelago

Seasonal and regional diff erences in long-term changes in large mesozooplankton(>505μm)biomass and abundance in a semi-enclosed subtropical bay

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Journal of Oceanology and Limnology 2021年第6期39卷 2281-2294页

作者： Ping DU Zhibing JIANG Yuanli ZHU Yibo LIAO Quanzhen CHEN Jiangning ZENG lu shou Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural Resources(MNR)Hangzhou 310012China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Ocean Space Resource Management Technology MNRHangzhou 310012China

Obvious spatiotemporal heterogeneity is a distinct characteristic of ecosystems in subtropical *** aid targeted management and ecological restoration in long and narrow semi-enclosed subtropical bays,we analyzed seasonal and regional differences in long-term changes(1980-2019)in the biomass and abundance of large mesozooplankton(LMZ;>505μm)in Xiangshan Bay,Zhejiang,*** found spatiotemporal heterogeneity in the historical changes of *** negative trends in LMZ biomass were found in the inner and middle bay during the warm season(summer and autumn),when the nutrient concentration(especially dissolved inorganic nitrogen)and temperature increased *** changes in Xiangshan Bay began in the late 1980s or early 1990s,coinciding with large-scale fish cage development.A rapid decline in LMZ biomass occurred after 2005 when power plants commenced operation,accelerating the warming ***,the joint stress of eutrophication and warming likely precipitated the decline in LMZ ***,a significant increase in LMZ biomass was found in the outer bay in *** trend was consistent with the trend of LMZ biomass near the Changjiang(Yangtze)River estuary,which indicates that the pelagic ecosystem in the outer bay was aff ected by water from the Changjiang River estuary during *** on our results,ecosystem management and restoration in semi-enclosed subtropical bays should focus on internal waters,which have a poor capacity for water *** Xiangshan Bay,the changes in the Changjiang River estuary ecosystem during the cold season(winter and spring)should also be considered.

关键词： large mesozooplankton long-term changes spatiotemporal heterogeneity Xiangshan Bay

Applying the maximum information principle to cell transmission model of traffic flow

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Journal of Hydrodynamics 2013年第5期25卷 725-730页

作者：刘喜敏卢守峰 Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Traffic and Transportation Engineering College and Key Laboratory of Road Structure and Material of Commu- nication Ministry Changsha University of Science and Technology Traffic and Transportation Engineering College Changsha University of Science and Technology

This paper integrates the maximum information principle with the Cell Transmission Model （CTM） to formulate the velocity distribution evolution of vehicle traffic flow. The proposed discrete traffic kinetic model uses the cell transmission model to calculate the macroscopic variables of the vehicle transmission, and the maximum information principle to examine the velocity distribution in each cell. The velocity distribution based on maximum information principle is solved by the Lagrange multiplier method. The advantage of the proposed model is that it can simultaneously calculate the hydrodynamic variables and velocity distribution at the cell level. An example shows how the proposed model works. The proposed model is a hybrid traffic simulation model, which can be used to understand the self-organization phenomena in traffic flows and predict the traffic evolution.

关键词： kinetic traffic model Cell Transmission Model (CTM) maximum information principle traffic flow velocity distribution

The Ecological Distributions of N, P Utilizing Bacteria and Heterotrophic Bacteria in the Moderate Hypoxia Zone of the Changjiang Estuary

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Journal of Ocean University of China 2013年第4期12卷 589-598页

作者： LIU Jingjing DU Ping ZENG Jiangning CHEN Quanzhen shou lu LIAO Yibo JIANG Zhibing Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration

The distributions of N utilizing bacteria (denitrifying bacteria and ammonifying bacteria) ,P utilizing bacteria (organic phosphobacteria and inorganic phosphobacteria) and heterotrophic bacteria in the Changjiang Estuary,and the roles of main environmental factors in distributing bacteria,are explored with observations from two cruises in June and August *** between the two important periods of initial hypoxia phase (June) and developed hypoxia phase (August) show differences in both bacterial distributions and the associated main environmental ***,the primary group of ammonifying bacteria has larger magnitude with spatial maximum value in the hypoxic stations related to sediment in *** phosphobacterial abundance and detection rates in August are much lower than those in June,but the denitrifying bacterial abundance becomes greater in ***,the difference of heterotrophic bacterial abundance between June and August is not ***,main environmental factors influencing bacteria vary from initial hypoxia phase to developed hypoxia *** parameters (salinity and NO3) in surface water and five environmental parameters (pH,salinity,PO43,NO3and temperature) in bottom water and surface sediment play major roles in the bacterial abundance in June,while different parameter combinations (salinity and PO43) in surface water and different parameter combinations (DO,DOC,NO3,PO43 and pH) in bottom water and surface sediment play major roles in ***,the bottom bacteria distributions in area south of 31 N are related to the position of the Taiwan Warm Current in *** bacterial abundance and distribution may respond to the environmental change in the hypoxia processes of initial phase and developed *** the hypoxia processes,the whole structure of bacterial functional groups probably turns to different states,causing the recycling of nutrient regeneration and aggravating hypoxia regionally.

关键词： Changjiang Estuary hypoxia bacterial functional group

Monocular vision based navigation method of mobile robot

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重庆邮电大学学报（自然科学版） 2009年第2期21卷 158-161页

作者： DONG Ji-wen YANG Sen lu shou-yin School of Information Science and Engineering University of Jinan Jinan 250022 P. R. China Research Institute of Robotics Shandong Jianzhu University Jinan 250101 P. R. China

A trajectory tracking method is presented for the visual navigation of the monocular mobile *** robot move along line trajectory drawn beforehand,recognized and stop on the stop-sign to finish special *** robot uses a forward looking colorful digital camera to capture information in front of the robot,and by the use of HSI model partition the trajectory and the stop-sign *** the "sampling estimate" method was used to calculate the navigation *** stop-sign is easily recognized and can identify 256 different *** indicate that the method can fit large-scale intensity of brightness and has more robustness and better real-time character.

关键词：移动机器人导航方法单目视觉 HSI模型跟踪方法视觉导航数码相机导航参数

Effect of exit location on flow of mice under emergency condition

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Chinese Physics B 2019年第1期28卷 290-299页

作者： Teng Zhang Shen-Shi Huang Xue-Lin Zhang shou-Xiang lu Chang-Hai Li State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230027China School of Civil Engineering Chongqing Three Gorges UniversityChongqing 404000China

The evacuation of crowds in a building has always emerged as a vital issue in many accidents. The geometrical structure of a room, especially the exit design has a great influence on crowd evacuation under emergency conditions. In this paper, the effect of exit location of a room on crowd evacuation in an emergency is investigated with mice. Two different exits are set in a rectangular chamber. One is located in the middle of a wall(middle-exit) and the other is at the corner of the chamber(corner-exit). Arching and clogging are observed in the flow of mice. The result based on the escape trajectories of mice shows a dynamic balance in the arch near the exit wherever the exit is located. We demonstrate that the occupant position in the arch has an effect on the escape sequence of mice. At a low stimulation level, the narrow middle-exit is more effective in increasing the flow rate of mice than the narrow corner-exit. However, the opposite result appears when the exit becomes wider. At a high stimulation level, the effect of exit location on flow of mice tends to be weakened. The results suggest that the specific level of stimulation needs to be taken into account when optimizing the evacuation efficiency of a crowd through the geometrical structure of a room.

关键词： exit location evacuation mice stimulation level

A Textual Research on the Image of＂Gaomei God＂ in the Stone Relief of the Han Dynasty

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Journal of Literature and Art Studies 2017年第12期7卷 1592-1603页

作者： lu shou-ye School of History Capital Normal University Beijing China

As the most primitive and the highest-level media in ancient Chinese society, Gaomei God played a pivotal role in the social life of the Han Dynasty. The stone relief is a vivid portrayal of the Han Dynasty society, and we can use the format routine method to fred out the image of Gaomei God in it. Starting from the Gaomei portrait, a research on typology is carried out before the portrait is divided into three types on the basis of its development and evolution, which is followed by a comprehensive analysis of its time, distribution area, configuration combination, carving techniques, image composition, development in a way to sum up the law of Gaomei portrait.

关键词： Gaomei stone relief of the Han Dynasty type

Distinct root system acclimation patterns of seagrass Zostera japonica in sediments of different trophic status:a research by X-ray computed tomography

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Journal of Oceanology and Limnology 2021年第6期39卷 2267-2280页

作者： Xiaoyue SONG Yi ZHOU Jiangning ZENG lu shou Xiaomei ZHANG Shidong YUE Wei GAO Weihua FENG Zhifu WANG Ping DU Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China College of Tropical Crops Hainan UniversityHaikou 570228China Key Laboratory of Engineering Oceanography Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China

Conspecific seagrass living in differing environments may develop different root system acclimation *** applied X-ray computed tomography(CT)for imaging and quantifying roots systems of Zostera japonica collected from typical oligotrophic and eutrophic sediments in two coastal sites of northern China,and determined sediment physicochemical properties that might influence root system morphology,density,and *** trophic status of sediments had little influence on the *** root length,and diameters of root and ***,*** in oligotrophic sediment developed the root system with longer rhizome node,deeper rhizome distribution,and larger allocation to below-ground tissues in order to acquire more nutrients and relieve the N *** the lower root and rhizome densities of *** in eutrophic sediment were mainly caused by fewer shoots and shorter longevity,which was resulted from the more serious sulfide *** results systematically revealed the effect of sediment trophic status on the phenotypic plasticity,quantity,and distribution of *** root system,and demonstrated the feasibly of X-ray CT in seagrass root system research.

关键词： Zostera japonica root system acclimation pattern sediment trophic status X-ray computed tomography

Partial function prediction of sulfate-reducing bacterial community from the rhizospheres of two typical coastal wetland plants in China

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Journal of Oceanology and Limnology 2021年第1期39卷 185-197页

作者： Xiaoyue SONG Jiangning ZENG Yi ZHOU Quanzhen CHEN Hongsheng YANG lu shou Yibo LIAO Wei HUANG Ping DU Qiang LIU Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Sulfate-reducing bacteria(SRB)are ubiquitous anaerobic microorganisms that play signifi cant roles in the global biogeochemical *** wetlands,one of the major habitats of SRB,exhibit high sulfate-reducing activity and thus play signifi cant roles in organic carbon remineralization,benthic geochemical action,and plant-microbe *** studies have provided credible evidence that the functional rather than the taxonomic composition of microbes responds more closely to environmental ***,in this study,functional gene prediction based on PacBio single molecular real-time sequencing of 16S rDNA was applied to determine the sulfate-reducing and organic substrate-decomposing activities of SRB in the rhizospheres of two typical coastal wetland plants in North and South China:Zostera japonica and Scirpus *** this end,some physicochemical characteristics of the sediments as well as the phylogenetic structure,community composition,diversity,and proportions of several functional genes of the SRB in the two plant rhizospheres were *** *** a meadow had a higher dissimilatory sulfate reduction capability than the ***-comprising saltmarsh,owing to its larger proportion of SRB in the microbial community,larger proportions of functional genes involved in dissimilatory sulfate reduction,and the stronger ability of the SRB to degrade organic substrates *** study confi rmed the feasibility of applying microbial community function prediction in research on the metabolic features of SRB,which will be helpful for gaining new knowledge of the biogeochemical and ecological roles of these bacteria in coastal wetlands.

关键词： sulfate-reducing bacteria(SRB) microbial community function prediction 16S rDNA PacBio SMRT sequencing Zostera japonica Scirpus mariqueter rhizosphere