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2014 International Conference on Manufacturing technology and Electronics Applications, ICMTEA 2014

作者： Cui, Pei Bai, Chun Zhi Science and Technology on Underwater Test and Control Laboratory Dalian China Dalian Scientific Test and Control Technology Institute Dalian China

ISBN: (纸本)9783038353287

In the special marine environmental conditions, there are certain advantages of ship seismic wave relative to underwater acoustic signal. However, due to the poor performance of seismic wave sensor, it is difficult to effectively detect seismic signal. From the signal characteristics of ship seismic wave, we can see that the ship seismic wave signal is better than underwater acoustic signal through comparative analysis in some special environment. In the low frequency band of DC-20Hz, the energy of the ship seismic is stronger and the line spectrum is more obvious. It briefly explains the mathematical model of ocean bottom seismometers receiving ship seismic wave information based on coupling theory. Finally, this paper focuses on many factors need to be considered in the selection of seismic wave sensor from the structure, type and performance of sensor. In view of different functionality of sensor types, it is suggested to use acceleration sensor to detect the ship seismic wave signal. © (2014) Trans Tech Publications, Switzerland.

关键词： Seismic waves

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Software design for theory analysis of underwater electromagnetic field in shallow sea environment

Software design for theory analysis of underwater electromag...

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2014 International Conference on Applied Sciences, Engineering and technology, ICASET 2014

作者： Cui, Pei Wu, Liang Jiang, Kai Na Science and Technology on Underwater Test and Control Laboratory Dalian 116013 China Dalian Scientific Test and Control Technology Institute Dalian 116013 China

ISBN: (纸本)9783038351849

The driving sources of the marine environment underwater electromagnetic field are complicated, the environmental parameters working on field source amplitude are numerous. The paper filters out the main respective factor through comparative analysis, on the basis of which composes theoretical analysis software of electromagnetic field underwater and the main environmental factors. The result shows that it is easy to get the variations of field source amplitude and main environmental parameters by setting the main environmental parameter values and field source forms. © (2014) Trans Tech Publications, Switzerland.

关键词： Software design

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Method of effectiveness evaluation for ATTWS based on cloud model

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Journal of Information and Computational Science 2015年第12期12卷 4749-4757页

作者： Xu, Hao Kang, Fengju Li, Dan School of Marine Science and Technology Northwestern Polytechnical University Xi'an China National Key Laboratory of Underwater Information Process and Control Xi'an China School of Civil and Environmental Engineering Georgia Institute of Technology AtlantaGeorgia United States

According to the characters of Anti-torpedo Torpedo Weapon System (ATTWS), the effectiveness evaluation system of ATTWS is established, and then a method based on the cloud model is proposed to achieve the effectiveness evaluation for ATTWS. In this method, each attribute is analyzed with the cloud model and a unique normalization function, and the state of ATTWS is represented by the weight deviation interval which is also used to evaluate the effectiveness for ATTWS. The analysis for the result of an evaluation example shows that this method is feasible and effective, and well solves the problems during the progress of the effectiveness evaluation for ATTWS. Copyright © 2015 Binary Information Press.

关键词： Cloud computing

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Ballast water discharge and the influence of seawater environment

Ballast water discharge and the influence of seawater enviro...

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4th International Conference on Materials Science and Information technology, MSIT 2014

作者： Li, Xiao Yan Liu, Sha Zhou, Zhi Min College of Life Science and Technology of Dalian University Liaoning Dalian 116622 China Science and Technology on Underwater Test and Control Laboratory Dalian 116013 China

ISBN: (纸本)9783038351733

Ships have carried solid ballast for thousands of years in the form of rocks, sand or metal. In modern times, ships use water as ballast. It is more easier to load on and off a ship and more efficient and economical than solid ones. Ship fills with ballast water when it is empty of cargo, and the ballast water is discharged when it loads cargo. In ballast water, there are hundreds of organisms carried that cause problematic ecological effects outside of their natural range. Preventing the transfer of invasive species and coordinating a timely and effective response to invasions require cooperation and collaboration between governments. Considerable efforts had already made to formulate appropriate standards for ballast water management during the convention development process. © (2014) Trans Tech Publications, Switzerland.

关键词： Ships

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Comparative bioenergetics of diploid and triploid pacific oysters Crassostreas gigas at different temperatures

Comparative bioenergetics of diploid and triploid pacific oy...

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4th International Conference on Materials Science and Information technology, MSIT 2014

作者： Li, Xiao Yan Zhou, Zhi Min College of Life Science and Technology of Dalian University Liaoning Dalian 116622 China Science and Technology on Underwater Test and Control Laboratory Dalian 116013 China

ISBN: (纸本)9783038351733

The energy budgets, assimilation and conversion efficiency of 1-year-old-triploid Pacific oysters Crassostrea gigas, were compared with those of sibling diploids to clarify the mechanism of energy metabolism. No significant difference was found between diploids and triploids in oxygen consumption. The net growth efficiencies of triploids and diploids were 37.4% and 33.9% respectively, and the gross growth efficiencies of them were 28.8% and 22.7%. The influence of ploidy and temperature on K1 was significant, but the variation of K2 may be attributable to ambient temperature. The ratio of gonad dry weight and dry tissue of triploids was 5% on average, and diploids about 25.6%. Our results showed that triploids, which do not reproduce and only have limited gonadal development, spend more energy for growth and more efficient in using energy than diploids do. © (2014) Trans Tech Publications, Switzerland.

关键词： Molluscs

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Agent-based modeling method for torpedo

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ICIC Express Letters 2015年第8期9卷 2285-2290页

作者： Xu, Hao Kang, Fengju Li, Liang School of Marine Science and Technology Northwestern Polytechnical University No. 127 West Youyi Road Xi’an China National Key Laboratory of Underwater Information Process and Control No. 127 West Youyi Road Xi’an China University Twente Drienerlolaan 5 Enschede Netherlands

In order to solve the problem that there is no agent-based modeling method for a torpedo, firstly, the formalized description for an agent-based torpedo is proposed, and as well, all the elements in it are particularly analyzed. Secondly, based on this description, the structure of this torpedo and the information stream in it are given. To validate the accuracy of this method, an agent-based torpedo instance and a test system that has a torpedo, a target and launch equipment are created. With the trajectories of two torpedoes, the results of this test illustrate that, the agent-based method is effective and feasible, and the intelligence of a torpedo is well demonstrated with this method. © 2015 ICIC International.

关键词： Autonomous agents

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Task scheduling strategy based on multi fitness particle swarm optimization in cloud computing

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ICIC Express Letters 2014年第11期8卷 3165-3170页

作者： Xu, Hao Kang, Fengju Li, Liang School of Marine Science and Technology Northwestern Polytechnical University No. 127 Youyixi Road Xi’an China National Key Laboratory of Underwater Information Process and Control Xi’an China University Twente Drienerlolaan 5 Enschede Netherlands

For the disadvantages in typical cloud computing task scheduling strategies, a strategy based on multi fitness particle swarm optimization is proposed. In this strategy, task completion time span, operation cost and resource load equilibrium are considered, and particle encoding mode, multi fitness functions and particle updating formula are designed. The result of a simulation experiment demonstrates that this strategy is feasible and effective, and has certain exploratory significance for the cloud computing task scheduling research.

关键词： Cloud computing

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Image processing and analysis system for corneal endothelial cell based on labVIEW and MATLAB

Image processing and analysis system for corneal endothelial...

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2014 International Conference on Manufacturing technology and Electronics Applications, ICMTEA 2014

作者： Yu, Cheng Bo Ke, Yan Hong Xiao, Dan Yuan, Yang Yu Yang, Yi Ju Remote Test and Control Institute Chongqing University of Technology Chongqing China Time grating sensor and advanced detection technology City key Laboratory of Chongqing China

ISBN: (纸本)9783038353287

To process corneal endothelial cell image quickly and efficiently, observe the corneal endothelial cell form and relevant calculation and analysis. This system adopts mixed programming of LabVIEW and MATLAB, to have image processing and analysis of the corneal endothelial cell. Use LabVIEW to design operation and display interface, and send the images collected to MATLAB for complex arithmetical operation, then put out data in LabVIEW. The experiment indicates the system has the advantage of intuitive interface, convenient operation, and quick arithmetic, has the practical reference value. © (2014) Trans Tech Publications, Switzerland.

关键词： MATLAB

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Study of segmentation algorithm based on corneal endothelial cell images 2

Study of segmentation algorithm based on corneal endothelial...

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2nd International Conference on Materials, Transportation and Environmental Engineering, CMTEE 2014

作者： Yang, Ru Min Wang, Shuai Yu, Cheng Bo Hu, Jing Jing Yang, Yi Ju Remote Test and Control Institute Chongqing University of Technology Chongqing China Time grating sensor and advanced detection technology City key Laboratory of Chongqing Chongqing China

ISBN: (纸本)9783038352488

In this paper, we study an an algorithm for accurately extracting the outline of Corneal Endothelial Cell images according to the structure and feature of the corneal endothelial cells. Firstly, we reduce the influence of uneven exposure to segmentation effect using histogram equalization. Secondly, reduce the image noise by Gaussian filtering. At last, research the classical algorithm of image segmentation through the contrast experiment and then select a simple and effective local NiBlack dynamic threshold algorithm. The experimental result shows that this processing method is not only simple, but also can segment the corneal endothelial cell images clearly, and provides a good foundation of data for accurate identification of the following images. © (2014) Trans Tech Publications, Switzerland.

关键词： Image segmentation

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Modification to first-order Born approximation for improved prediction of scattered sound from weakly scattering objects

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Chinese Journal of Acoustics 2014年第3期33卷 228-238页

作者： ZHANG Peizhen WANG Shuozhong WANG Runtian CHEN Yunfei WANG Luxian School of Communication and Information Engineering Shanghai University School of Information Guangdong Ocean University Shanghai Acoustics Laboratory Chinese Academy of Sciences Key Laboratory for Underwater Test and Control Technology

When deriving the Fourier diffraction theorem based on the first-order Born approximation,the difference between wave number of the scattering object and that of the surrounding medium is ignored,causing substantial errors in sound scattering *** paper modifies the Born approximation by taking into account the amplitude and phase changes between the scattering object and the water due to the wave number *** changing the radius and center position of the sampling circle in the Fourier domain,accuracy of the predicted sound scattering is *** the modified Born approximation,the computed far-field directional pattern of the scattered sound from a circular cylinder is in good agreement with the rigorous *** calculations for several objects with different shapes are used to show applicability and effectiveness of the proposed method.

关键词： Modification to first-order Born approximation for improved prediction of scattered sound from weakly scattering objects

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