The Experts below are selected from a list of 126 Experts worldwide ranked by ideXlab platform

Xiangwei Xing - One of the best experts on this subject based on the ideXlab platform.

  • 2D comb feature for analysis of Ship classification in high-resolution SAR imagery
    Electronics Letters, 2017
    Co-Authors: Xiangguang Leng, Kefeng Ji, Shilin Zhou, Xiangwei Xing
    Abstract:

    A new feature named `2D comb' to improve Ship classification is proposed. The proposed feature presents added value to distinguish between container Ship, Tank Ship and cargo Ship. It is based on radar cross-section (RCS) statistic of the Ship target related to the Ship structure. Besides, related local RCS is proposed to classify three kinds of Ships. Experimental results based on TerraSAR-X images show that the proposed feature can abstract and describe the Ship structure in high-resolution synthetic aperture radar (SAR) imagery. It establishes relationShip between RCS and Ship structure, which is very useful to distinguish different kinds of Ships.

  • A comb feature for the analysis of Ship classification in high resolution SAR imagery
    2016 CIE International Conference on Radar (RADAR), 2016
    Co-Authors: Xiangguang Leng, Kefeng Ji, Shilin Zhou, Xiangwei Xing
    Abstract:

    In the context of maritime surveillance from high resolution SAR imagery, this paper illustrates a study of Ship classification, together with a new feature named `comb' suggested to solve the problem. The proposed comb feature presents the added value in application to distinguish between container Ship, Tank Ship, and cargo Ship. It is based on the analysis on radar cross section (RCS) statistic of the Ship target related to the Ship structure. Besides, a related local RCS (LRCS) is proposed to classify three kinds of Ships. The data for experiments is made of TerraSAR-X images.

Shi Duan - One of the best experts on this subject based on the ideXlab platform.

  • Dynamic simulation of mechanical-electric coupled system of the three-gorges wire rope hoist full balanced vertical Shiplift
    Journal of Central China Normal University, 2002
    Co-Authors: Shi Duan
    Abstract:

    This paper presents a double close loop speed regulation dynamic model of the electric driving and control system of the three gorges wire rope hoist full balanced vertical Shiplift, and dynamic models of subsystems. It establishes the integrated dynamic model by using the rigid subsystem method. Using SIMULINK in MATLAB language, it then puts forward a mechanical electric coupled model, and analyses the instantaneous response, making use of Wilson θ method. At last, it executes a dynamic simulation under the condition of +20 cm water depth error in the Ship Tank,when Ship Tank startup from downstream to upstream.

  • Probing into dynamics in wire rope hoist vertical Ship lift
    Journal of Wuhan University of Hydraulic and Electric Engineering, 2000
    Co-Authors: Shi Duan
    Abstract:

    The hydrodynamics of the Ship Tank in the procedure of Ships in out and collision dynamics of collision beam, are analyzed. By using the nonlinear shallow water wave equations, a dynamics model is established. The friction forces between water and Ship, between Ship Tank and water, and calculating error caused by supposing non viscous and non rotation water; are considered. The two plans of collision beam, i.e. cushioning hydraulic cylinders and plastic simply supported beam, and the corresponding dynamics; are analyzed. The dynamics of the Ship lift in the procedure of lifting lowering, are also analyzed. The dynamic model of the main hoist system must consist of mechanical transmission gap and manufacture and assembly tolerance. Authors put forward that the main electric driving and control system can be simulated by using SIMULINK of MATLAB language, and the dynamic equations should be connected with the ones of the main hoist subsystem and the wire rope Ship Tank subsystem, and accordingly the influence of electric parameters on the dynamic characteristics can be studied.

Xiangguang Leng - One of the best experts on this subject based on the ideXlab platform.

  • 2D comb feature for analysis of Ship classification in high-resolution SAR imagery
    Electronics Letters, 2017
    Co-Authors: Xiangguang Leng, Kefeng Ji, Shilin Zhou, Xiangwei Xing
    Abstract:

    A new feature named `2D comb' to improve Ship classification is proposed. The proposed feature presents added value to distinguish between container Ship, Tank Ship and cargo Ship. It is based on radar cross-section (RCS) statistic of the Ship target related to the Ship structure. Besides, related local RCS is proposed to classify three kinds of Ships. Experimental results based on TerraSAR-X images show that the proposed feature can abstract and describe the Ship structure in high-resolution synthetic aperture radar (SAR) imagery. It establishes relationShip between RCS and Ship structure, which is very useful to distinguish different kinds of Ships.

  • A comb feature for the analysis of Ship classification in high resolution SAR imagery
    2016 CIE International Conference on Radar (RADAR), 2016
    Co-Authors: Xiangguang Leng, Kefeng Ji, Shilin Zhou, Xiangwei Xing
    Abstract:

    In the context of maritime surveillance from high resolution SAR imagery, this paper illustrates a study of Ship classification, together with a new feature named `comb' suggested to solve the problem. The proposed comb feature presents the added value in application to distinguish between container Ship, Tank Ship, and cargo Ship. It is based on the analysis on radar cross section (RCS) statistic of the Ship target related to the Ship structure. Besides, a related local RCS (LRCS) is proposed to classify three kinds of Ships. The data for experiments is made of TerraSAR-X images.

Yue Baozeng - One of the best experts on this subject based on the ideXlab platform.

  • RECENT ADVANCES IN LIQUID-FILLED Tank DYNAMICS AND CONTROL
    Advances in Mechanics, 2011
    Co-Authors: Yue Baozeng
    Abstract:

    The engineering application background of liquid-filled Tank dynamics and control is presented. Recent advances in liquid-filled Tank dynamics and control are systematically reviewed in terms of the following three aspects, i.e. liquid sloshing dynamics, liquid sloshing equivalent mechanical model and multi-body dynamics and control for liquid-filled Tanks. Liquid sloshing dynamics in Tanks are overviewed from analytical methods to numerical methods. In the part of multi-body system dynamics and control, the research progresses are provided for vehicle and Ship Tank system dynamics and liquid-filled spacecraft dynamics and control. Finally, key topics for further study are pointed out.

Heyer A. - One of the best experts on this subject based on the ideXlab platform.

  • Microbiologically influenced corrosion in Ship ballast Tanks
    2013
    Co-Authors: Heyer A.
    Abstract:

    Microbiologically influenced corrosion (MIC) is known to be a dangerous process in Ship Tanks due to its rapid and yet unpredictable occurrence, leading to extremely fast local corrosion, possibly jeopardizing the structural integrity, in a relatively short time. This project focuses on a fundamental understanding of MIC processes in Ship ballast Tanks (SBTs) as a basis for the development of effective counterstrategies that offer an appropriate protection against MIC attack. Local conditions typically consist of oxic-anoxic environments where both aerobic and anaerobic biofilms develop resulting in aggressive corrosion. Fundamental understanding of the dominant parameters considering material, environment and microbes were addressed. In chapter 1 a review of the conditions in Ship ballast Tanks, possible MIC mechanisms and practical counterstrategies is presented. Chapter two deals with the impact of MIC in a real scale SBT to understand community characteristics within SBTs. The study highlights the impact of attached biofilms on local corrosion in a Ship ballast Tank environment. The application of molecular techniques in combination with electrochemical techniques provides a better and synergistic monitoring tool in the enclosed seawater environment. The work in this chapter provides a systematic future research and analysis approach to build up a database of bacterial species, which are involved in corrosion or coating degradation on-board of Ships. A more effective treatment system for treating biofilms on sidewalls of Ship ballast Tanks will help to reduce costly material replacements. In chapter three the usability of electrochemical techniques for monitoring MIC is discussed in detail. Three individual approaches were studied in the lab comprising: (i) corrosion impact of a dual species biofilm, (ii) implementation of a simulated Ship Tank model system and (iii) the study of the biodeterioration of a Ship ballast Tank coating. The fourth chapter comprises different highly sensitive and spatially resolved techniques to study MIC on a very local scale. The first step included the development of a novel analysis approach for the preparation and visualization of metal surfaces, suitable for combined imaging by epifluorescent microscopy (EFM), AFM and SEM. By combining three different microscopes, the complementary use of these high-resolution techniques to study surface changes and accumulation of biological substances on stainless steel surfaces was proven. The last experimental part of the thesis covers the use of local electrochemical techniques. The scanning vibrating electrode technique (SVET) and scanning electrochemical microscope (SECM) were used for their high spatial resolution close to the metal/solution interface. By combing these techniques in-situ changes at metal/solution interfaces in the presence and absence of aerobic bacteria could be followed up. Therefore it was possible to demonstrate that the application of local scanning electrochemical techniques with high-spatial resolution is a powerful tool for a better understanding of microbial activity on metal systems providing in-situ information of the processes taking place at the metal/biofilm/solution interface. Chapter five summarises the conclusions drawn in the preceding chapters. In addition, the general discussion in this chapter links together some of the preceding results and suggestions. The last part of the thesis gives a future outlook on MIC monitoring and prediction and reviews options to mitigate MIC failures based on a multidimensional approach

  • Microbiologically influenced corrosion in Ship ballast Tanks
    2013
    Co-Authors: Heyer A.
    Abstract:

    Microbiologically influenced corrosion (MIC) is known to be a dangerous process in Ship Tanks due to its rapid and yet unpredictable occurrence, leading to extremely fast local corrosion, possibly jeopardizing the structural integrity, in a relatively short time. This project focuses on a fundamental understanding of MIC processes in Ship ballast Tanks (SBTs) as a basis for the development of effective counterstrategies that offer an appropriate protection against MIC attack. Local conditions typically consist of oxic-anoxic environments where both aerobic and anaerobic biofilms develop resulting in aggressive corrosion. Fundamental understanding of the dominant parameters considering material, environment and microbes were addressed. In chapter 1 a review of the conditions in Ship ballast Tanks, possible MIC mechanisms and practical counterstrategies is presented. Chapter two deals with the impact of MIC in a real scale SBT to understand community characteristics within SBTs. The study highlights the impact of attached biofilms on local corrosion in a Ship ballast Tank environment. The application of molecular techniques in combination with electrochemical techniques provides a better and synergistic monitoring tool in the enclosed seawater environment. The work in this chapter provides a systematic future research and analysis approach to build up a database of bacterial species, which are involved in corrosion or coating degradation on-board of Ships. A more effective treatment system for treating biofilms on sidewalls of Ship ballast Tanks will help to reduce costly material replacements. In chapter three the usability of electrochemical techniques for monitoring MIC is discussed in detail. Three individual approaches were studied in the lab comprising: (i) corrosion impact of a dual species biofilm, (ii) implementation of a simulated Ship Tank model system and (iii) the study of the biodeterioration of a Ship ballast Tank coating. The fourth chapter comprises different highly sensitive and spatially resolved techniques to study MIC on a very local scale. The first step included the development of a novel analysis approach for the preparation and visualization of metal surfaces, suitable for combined imaging by epifluorescent microscopy (EFM), AFM and SEM. By combining three different microscopes, the complementary use of these high-resolution techniques to study surface changes and accumulation of biological substances on stainless steel surfaces was proven. The last experimental part of the thesis covers the use of local electrochemical techniques. The scanning vibrating electrode technique (SVET) and scanning electrochemical microscope (SECM) were used for their high spatial resolution close to the metal/solution interface. By combing these techniques in-situ changes at metal/solution interfaces in the presence and absence of aerobic bacteria could be followed up. Therefore it was possible to demonstrate that the application of local scanning electrochemical techniques with high-spatial resolution is a powerful tool for a better understanding of microbial activity on metal systems providing in-situ information of the processes taking place at the metal/biofilm/solution interface. Chapter five summarises the conclusions drawn in the preceding chapters. In addition, the general discussion in this chapter links together some of the preceding results and suggestions. The last part of the thesis gives a future outlook on MIC monitoring and prediction and reviews options to mitigate MIC failures based on a multidimensional approach.Materials Science & EngineeringMechanical, Maritime and Materials Engineerin