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Distributions of surficial sediments and its response to dynamic actions in the Xiamen Bay sea area, China

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Acta Oceanologica Sinica 2016年第4期35卷 9-18页

作者： ZUO Shuhua HAN Zhiyuan HUANG Yunxin HAN Jie XIE Mingxiao National Engineering Laboratory of port Hydraulic construction Technology Tianjin Research Institute of Water Transport Engineering Key Laboratory of Engineering Sediment of Ministry of Transport Tianjin Research Institute of Water Transport Engineering State Key Laboratory of Estuarine and Coastal Research East China Normal University School of Science Tianjin University of Technology

Sediment distribution is important for morphodynamic evolution and shoreline changes in coastal zones and estuaries. In the study, the data of 230 surface sediment samples collected from the Xiamen Bay sea area in September 2008 are used to investigate the spatial distribution and sediment transport pathway. The grain size distribution of surficial sediments in the Xiamen Bay area is shown distinctly in this study. In addition, the Grain Size Transport Analysis model is used for conveying trend analysis of the sediment in this area, particularly for determining the sediment movement trend. The results indicate that eight sediment types are present for samples, with clayey silt comprising the highest percentage in the study area at 65.22%. Moreover, in the different subareas, the characteristics of grain size parameters are obviously different owing to different sediment sources and hydrodynamic conditions. Furthermore, runoff, tides, and waves are the main forces dominating sediment dynamics on the seabed and tidal flats, and the sediment movement trend is closely related to hydrodynamic conditions.

关键词： Xiamen port Jiulongjiang Estuary Xiamen Bay surface sediments grain size dynamic response

Numerical Modeling of the Undertow Structure and Sandbar Migration in the Surfzone

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China Ocean Engineering 2017年第5期31卷 549-558页

作者： XIE Ming-xiao ZHANG Chi YANG Zhi-wen LI Shan LI Xin GUO Wei-jun ZUO Shu-hua Key Laboratory of Engineering Sediment Tianjin Research Institute for Water Transport EngineeringM.O.T. National Engineering Laboratory for port Hydraulic construction Technology Tianjin Research Institute for Water Transport EngineeringM.O.T. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Key Laboratory of Coastal Engineering Hydrodynamics of CCCC Tianjin Port Engineering InstituteCCCC College of Environmental Sciences and Engineering Dalian Maritime University

A process-based 3D numerical model for surfzone hydrodynamics and beach evolution was established. Comparisons between the experimental data and model results proved that the model could effectively describe the hydrodynamics, sediment transport feature and sandbar migration process in the surfzone with satisfactory precision. A series of numerical simulations on the wave breaking and shoaling up to a barred beach were carried out based on the model system. Analyzed from the model results, the wave-induced current system in the surfzone consists of two major processes, which are the phase-averaged undertow caused by wave breaking and the net drift caused by both of the nonlinear wave motion and surface roller effect. When storm waves come to the barred beach, the strong offshore undertow along the beach suppresses the onshore net drift, making the initial sandbar migrate to the seaside. Under the condition of calm wave environment, both the undertow and net drift flow to the shoreline at the offshore side of the sandbar, and then push the initial sandbar to the shoreline. The consideration of surface roller has significant impact on the modeling results of the sandbar migration. As the roller transfer rate increases, the sandbar moves onshore especially under the storm wave condition.

关键词： process-based numerical model undertow net driit sediment wansport sandbar migration

The Flipping-Free Full-Parallax Tabletop Integral Imaging with Enhanced Viewing Angle Based on Space-Multiplexed Voxel Screen and Compound Lens Array

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 3197-3211页

作者： Peiren Wang Jinqiang Bi Zilong Li Xue Han Zhengyang Li Xiaozheng Wang National Engineering Research Center of port Hydraulic construction Technology Tianjin Research Institute forWater Transport EngineeringM.O.T.Tianjin300456China State Key Laboratory of Information Photonics&Optical Communications BUPTBeijing100876China Research Department ofWireless Network Huawei TechnologiesShanghai201206China

Tabletop integral imaging display with a more realistic and immersive experience has always been a hot spot in three-dimensional imaging technology,widely used in biomedical imaging and visualization to enhance medical ***,the traditional structural characteristics of integral imaging display inevitably introduce the flipping effect outside the effective viewing ***,a full-parallax tabletop integral imaging display without the flipping effect based on space-multiplexed voxel screen and compound lens array is demonstrated,and two holographic functional screens with different parameters are optically designed and *** eliminate the flipping effect in the reconstruction process,the space-multiplexed voxel screen consisting of a projector array and the holographic functional screen is presented to constrain light beams passing through the corresponding *** greatly promote imaging quality within the viewing area,the aspherical structure of the compound lens is optimized to balance the *** cooperates with the holographic functional screen to modulate the light field spatial *** with the simulation results,the distortion rate of the imaging display is reduced to less than 9%from more than 30%.In the experiment,the floating high-quality reconstructed three-dimensional image without the flipping effect can be observed with the correct 3D perception at 96°×96°viewing angle,where 44,100 viewpoints are employed.

关键词： Integral imaging display flipping effect large viewing angle optimized compound lens imaging distortion

Improving Association Rules Accuracy in Noisy Domains Using Instance Reduction Techniques

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Computers, Materials & Continua 2022年第8期72卷 3719-3749页

作者： Mousa Al-Akhras Zainab Darwish Samer Atawneh Mohamed Habib College of Computing and Informatics Saudi Electronic UniversityRiyadh11673Saudi Arabia King Abdullah II School for Information Technology The University of JordanAmman11942Jordan Faculty of Engineering Port Said UniversityPort Said42523Egypt

Association rules’learning is a machine learning method used in finding underlying associations in large *** intentionally or unintentionally present,noise in training instances causes overfitting while building the classifier and negatively impacts classification *** paper uses instance reduction techniques for the datasets before mining the association rules and building the *** reduction techniques were originally developed to reduce memory requirements in instance-based *** paper utilizes them to remove noise from the dataset before training the association rules *** experiments were conducted to assess the accuracy of association rules with different instance reduction techniques,namely:DecrementalReduction Optimization Procedure(DROP)3,DROP5,ALL K-Nearest Neighbors(ALLKNN),Edited Nearest Neighbor(ENN),and Repeated Edited Nearest Neighbor(RENN)in different noise *** show that instance reduction techniques substantially improved the average classification accuracy on three different noise levels:0%,5%,and 10%.The RENN algorithm achieved the highest levels of accuracy with a significant improvement on seven out of eight used datasets from the University of California Irvine(UCI)machine learning *** improvements were more apparent in the 5%and the 10%noise *** RENN was applied,the average classification accuracy for the eight datasets in the zero-noise test enhanced from 70.47%to 76.65%compared to the original *** average accuracy was improved from 66.08%to 77.47%for the 5%-noise case and from 59.89%to 77.59%in the 10%-noise *** confidence was also reported in building the association rules when RENN was *** above results indicate that RENN is a good solution in removing noise and avoiding overfitting during the construction of the association rules classifier,especially in noisy domains.

关键词： Association rules classification instance reduction techniques classification overfitting noise data cleansing

Methane and Hydrogen Storage in Metal Organic Frameworks: A Mini Review

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Journal of Environmental & Earth Sciences 2020年第2期2卷 56-68页

作者： Oghenegare Emmanuel Eyankware Idaeresoari Harriet Ateke TegaFej Consulting Services Port HarcourtRivers StateNigeria Department of Petroleum and Gas Engineering University of Port HarcourtRivers stateNigeria

The need for a net zero carbon emission future is imperative forenvironmental sustainability hence, intensive carbon fuels would need tobe replaced with less carbon emitting energy sources such as natural gastill clean energy source such as hydrogen becomes commercialized. Asa result, this mini review discusses the use of metal organic framework(MOF) for adsorption of methane and hydrogen in specially designed tanksfor improved performance so as to increase their applicability. Herein,adsorption (delivery) capacity of selected high performing MOFs formethane and hydrogen storage were highlighted in reference to the targetsset by United States Department of Energy’s Advanced Research ProjectsAgency-Energy (ARPA-E) and Fuel Cells Technology Office. In thisregard, specific design and chemistry of MOFs for improved methane andhydrogen adsorption were highlighted accordingly. In addition, an overviewof computational and molecular studies of hypothetical MOFs was done- the various approaches used and their proficiency for construction ofspecific of crystalline structures and topologies were herewith discussed.

关键词： Methane Hydrogen Metal organic framework Adsorption Storage Computational

Seabed deposition and erosion change and influence factors in the Yangshan Deepwater port over the years

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Acta Oceanologica Sinica 2019年第7期38卷 96-106页

作者： Shuhua Zuo Hualiang Xie Xiaoming Ying Cheng Cui Yuxin Huang Huaiyuan Li Mingxiao Xie National Engineering Laboratory for port Hydraulic construction Technology Tianjin Research Institute for Water Transport EngineeringTianjin 300456China Key Laboratory of Engineering Sediment of Ministry of Transport Tianjin Research Institute for Water Transport EngineeringTianjin 300456China South China Sea Institute of Marine Planning and Environmental Research State Oceanic AdministrationGuangzhou 510300China

The seabed scouring and silting are very important to the construction of port and waterway engineering. Seabed deposition and erosion change is complicated due to the influence of sediment supply, human activities and other factors. The Yangshan Deepwater port is the new deep water harbor, which is an important part of the Shanghai International Shipping Service Center. Its construction has received much attention. At present, the water depth from the 1 st to the 3 rd harbor district is currently suitable under regular dredging and tidal current action. The fourth harbor district will be built in the world’s largest fully-automated deep water wharf. In the study, bathymetry change of the entire sea area of the Yangshan Deepwater port and the 4 th harbor district(i.e.,Phase IV project) waters were analyzed quantitatively using multiyear bathymetric, hydrological and sediment data. The results show that from 1998 to 2010, seabed changes are characterized by large volumes of erosion and sedimentation, which the southern part was deposited and the northern part was eroded in the inner harbor waters, but the seabed of the Kezhushan inlet was eroded. Seabed changes of Phase IV project waters generally show a scour tendency in recent few years with the annual scour rate about 0.7 m. Among the many factors, the existence of Kezhushan inlet and its influence of the western water flow play an important positive role in water depth changes under the ebb tide action.

关键词： Yangshan Deepwater port phase IV project water and sediment environment seabed deposition and erosion change diversion dike

Free Vibration Analysis of Single-Layered Graphene Sheets Based on a Continuum Model

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应用物理前沿（中英文版） 2014年第1期2卷 1-7页

作者： Jinbao Wang Meiling Tian Xiaoqiao He Zhibo Tang School of Maritime Coastal and Port Construction Engineering Zhejiang Ocean University Zhoushan 316021 China Department of Building and construction City University ofHong Kong Tat Chee Avenue Kowloon Hong Kong

The port of Los Angeles Priorities in Its Logistics Development

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上海海事大学学报 2004年第2期25卷 105-108页

作者： Larry A·Keller Executive Director port of Los Angeles

Until very recently, business conditions and the a-bility to finance needed improvements determined the feasibility of terminal development at America’s ports, and the port of Los Angeles was no exception. Of course, construction costs, debt and overall financial stability were all considered as ports weighed the wisdom of multimillion - dollar investments.

关键词： The port of Los Angeles Priorities in Its Logistics Development

A New Type Anticorrosion Coating for Ocean Reinforced Concrete Structures

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China Ocean Engineering 2000年第3期15卷 385-390页

作者：程琪耿桂生罗锋吴三余赵大林 lianyungang port Office Lianyungang 222046 China Shanghai Harbour Design and Research Institute Shanghai 200233 China

Corrosion of reinforced concrete structures is a serious problem in ocean engineering. As an orientation of study, anticorrosion coating technique is developed and widely applied, but many problems need to be solved. LSW-2 type anticorrosion coating for maritime reinforced concrete structures is characterized by sea water resistance, salt fog resistance, moisture and heal resistance as well as impermeability to chlorions. The new type coating can be applied to wet concrete surface by conventional construction technique. It is a breakthrough in solving the above mentioned problem. The paper mainly introduces the test results, the property indices, coating procedure, construction technique and economic benefit of Ihe coating.

关键词： LSI V- 2 type anticorrosion coating:property construction techmique reinforced coneret ocean engineering