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Wang R.,China Marine Development and Research Center | Zhou J.,China Marine Development and Research Center | Chen J.,China Marine Development and Research Center | Wang Y.,China Marine Development and Research Center
Proceedings - 2016 3rd International Conference on Mathematics and Computers in Sciences and in Industry, MCSI 2016 | Year: 2016

Mode-mixing, boundary effects and necessary extrema lacking and etc. are the main problems involved in empirical mode decomposition (EMD). The paper presents an improved empirical mode decomposition based on assisted signals: Gaussian noises. Firstly, the given 1D Gaussian noise and its negative counterpart are added to the original respectively to construct the two s to be decomposed. Secondly, the decomposed IMFs from the two signals are added together to get the IMFs, in which the added noises are canceled out with less mode-mixing and boundary effects. Lastly, the efficiency and performance of the method are given through theoretical analysis and experiments. ©2016 IEEE.

Yu Y.T.,China Marine Development and Research Center | Ding Y.,Beijing Sino Ocean JIYE Property Management Co. | Yu Y.X.,Peking University
Advanced Materials Research | Year: 2013

The fundamental basis of Navy operational command decision support system is efficient to make an objective assessment of the complex dynamic sea battlefield situation. According to the study proposes the sea battlefield situation based on a system dynamics model evaluate simulation. First sea battlefield situation system analysis; second system causality analysis, to establish a causal loop diagram; again is based on the sea battlefield situation to assess the relationship between flow diagram, build SD simulation model; enter the initial parameter; finally, based on the events of the battlefield to enter the initial parameter, assessment simulation sea battlefield situation, analysis simulation conclusion, put forward suggestions. © (2013) Trans Tech Publications, Switzerland.

Li X.,China Marine Development and Research Center | Zhu Z.L.,Nanjing Southeast University
Advanced Materials Research | Year: 2014

Geomagnetic matching is a new developmental technology in recent years. For resolving the question of the searching space is too much, a geomagnetic matching algorithm based on AFSSS is proposed, which imitates the fish behaviors such as the preying, swarming, following and leaping etc to achieve the global optimum value, then achieve the emendation of inertial system. Firstly, the affine transformation model between inertial trajectory and real trajectory is displayed. Secondly, from the application of geomagnetic matching point of view, the state of artificial fish (AF), distance and food consistence are defined afresh, and the algorithm flow chart based on AFSSS is given. Lastly, the simulation analysis is performed in an actual magnetic reference map. The simulation results show that the algorithm actualizes the precision localization when the inertial system exist position error, velocity error and heading error and then validates the feasibility of the proposing method. © (2014) Trans Tech Publications, Switzerland.

Tang J.,Tsinghua University | Luo J.,China Marine Development and Research Center | Tang B.,Tsinghua University | Du J.S.,CAS Shenyang Institute of Automation
Science China Information Sciences | Year: 2014

In this paper, we propose a general target model for multiple-input multiple-output (MIMO) radar. Two types of targets are presented. For each type of target, we develop a corresponding optimum waveform designing method to optimize detection performance. Based on Chernoff-Stein lemma, we use relative entropy as the performance measure. We show that the optimum waveform designing method can obtain better detection performance than traditional orthogonal waveform designing method. © 2012 Science China Press and Springer-Verlag Berlin Heidelberg.

Li W.,Beijing Institute of Technology | Qiao X.,Beijing Institute of Technology | Zhao H.,Beijing Institute of Technology | Wang S.,China Marine Development and Research Center | Ren Q.,Beijing Institute of Technology
Journal of Nanoscience and Nanotechnology | Year: 2013

Carbon/cobalt ferromagnetic light composites with high performance of microwave absorbing properties were prepared by hydrothermal method using starch and hollow cobalt ferrites. It was concluded that after carbonization the spinel structure ferrites changed to Co3Fe7 alloys and the temperature of graphitization was significantly decreased for the catalytic of CoFe2O4/Co3Fe7. The increase of carbon content, and exist of CoFe2O4/Co3Fe 7 heightened the microwave absorbing properties. Electromagnetic parameters were tested with 40% of the titled materials and 60% of paraffin wax composites by using HP8722ES vector network analyzer. The reflection was also simulated through transmission line theory. The microwave absorbers exhibited a maximum reflection loss -43 dB and the electromagnetic wave absorption less than -10 dB was found to exceed 3.0 GHz between 11.6 GHz and 15 GHz for an absorber thickness of 2 mm. Copyright © 2013 American Scientific Publishers All rights reserved.

Cheng S.-Y.,Harbin Engineering University | Liu X.-K.,China Marine Development and Research Center
Proceedings - International Conference on Machine Learning and Cybernetics | Year: 2011

Nuclear Steam Generators is very important equipment in nuclear reactor. It should insure sufficient cooling of nuclear reactor and prevent the damage of turbine blades. This paper proposes a new control strategy for Nuclear Steam Generators to ensure its safety and normal operating. The control method is based on fuzzy-PID and water mass inventory. In order to study the controller and validate& verify the control method, the paper adopt to full-scope simulator of nuclear power plants which can simulate the total plant operating characteristics. The simulation test results show that the new controller is superior to the conventional PID controller in controlling the Nuclear Steam Generators. © 2011 IEEE.

Cheng S.,Harbin Engineering University | Liu X.,China Marine Development and Research Center | Peng M.,Harbin Engineering University
Applied Mechanics and Materials | Year: 2012

The Human Machine Interface (HMI) of Monitor& Control System (MCS) is an important part of main control room in Nuclear Power Plants (NPP). The MCS is integrated by networks, digital computers and computer software. The paper discusses a new design mode for the HMI of MCS in Nuclear Power Plants. How to make the MCS information available is the focus of the HMI research. The paper discusses the design and research about the main layout and functions of the HMI. In order to verify and validate the design of HMI, the HMI of MCS is developed by a configuration software of JADE. HMI debugged with the NPP simulator. The Test illustrates that the HMI can help the operators to get very important information from MCS, which help the operators to operate the nuclear plant safely and reduces the human error.

Cheng S.,Harbin Engineering University | Liu X.,China Marine Development and Research Center | Peng M.,Harbin Engineering University
Applied Mechanics and Materials | Year: 2012

An Monitor& Diagnosis Support System for Nuclear Power Plants (NPPMDS) is developed in the embedded real-time operation system VxWorks in this paper. NPPMCS includes data collection and validation unit, operation monitoring unit, fault diagnosis unit, alarm analysis unit, operation procedures and Human-machine interface and so on. The paper introduces the design and implementation of NPPMDS including the structure of the NPPMDS and the main function units. In order to confirm the validity of this system, the SGTR simulation experiment was carried out on a full scale simulator of nuclear power plants. The experimental results show that the system provides operation support, the load and pressure for the workers can be reduced and the safety of nuclear power plants can be enhanced.

Liu X.-K.,China Marine Development and Research Center | Cheng S.-Y.,Harbin Engineering University | Deng X.-X.,Harbin Engineering University
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2011

In order to realize functions of teaching training and research for Steam Power Plants (SPP) simulator, the paper designed and implemented the Monitor& Control System (MCS) of the SPP simulator, and its implement based on a new type of software-GL Studio. The paper also introduced the virtual MCS technology based on GL Studio and the real-time communication between simulation models and the virtual MCS. Finally, the virtual MCS and simulation models of SPP were tested. The results showed that the virtual MCS based on GL Studio development was high fidelity and facilitate the upgrading, the virtual MCS can be used for teaching training and scientific research. © 2011 IEEE.

Liu B.,China Marine Development and Research Center | Fang Z.-G.,China Marine Development and Research Center | Wang H.-B.,China Marine Development and Research Center | Wang T.,China Marine Development and Research Center
Progress in Organic Coatings | Year: 2013

Deep sea exploitation represents the future direction for its abundant resources, while organic coatings can play a very important role in ocean engineering for corrosion protection. In this paper, under simulated deep sea environment in the laboratory, the effect of the crosslink density and the adhesion force of the coatings on the anti-corrosion performance of two different types of epoxy coatings was studied by using electrochemical impedance spectroscopy (EIS) and adhesion test. The results showed that the deterioration of coatings' property of corrosion protection under simulated deep sea environment was much faster than that of under normal pressured seawater. However, the diffusion velocity of water molecule through epoxy coatings decreased with increasing of the crosslink density and the adhesion force of the coatings. Therefore, the capability of corrosion protection could be improved by increasing the density of crosslink of the coatings within some extent and by increasing the adhesion force of the coatings. .© 2013 Elsevier B.V. All rights reserved.

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