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Hu G.,Yantai University | Yuan S.,NAEI
International Journal on Smart Sensing and Intelligent Systems | Year: 2016

Local Segmentation is the fundamental task for image processing. Consider to the problem of low segmentation precision and contour control instability for image local segmentation, a local segmentation theory is researched that based on SSCACM (spectral clustering with spatial coherence property jointing active contour model). First, by applying spatial coherence property constraint of image pixels to spectral clustering, an adaptive similarity function is constructed and the corresponding spectral clustering algorithm is used to extract initial contour of the local region of an image. Then, the NBACM (narrow band active contour model) is combined with the priori information of initial contour to evolve contour curve to get the segmentation result. At last, the local segmentation experiment is realized on synthetic images and medical images. The experimental results show that the method proposed can extract contour accurately and can improve the effectiveness and robust for image local segmentation.

Wang Z.,Graduate Students Brigade of NAEI | Cao Y.,NAEI | Wang M.,Graduate Students Brigade of NAEI | Chen X.,Unit 75103
Gaoya Dianqi/High Voltage Apparatus | Year: 2014

According to the working principle of synchronous induction coil launcher, mathematical model of three-stage electromagnetic coil vertical launcher (EMCVL) is established. With the application of Ansoft, the dynamic simulation of its process is made. The electromagnetic field and the dynamic characteristic curves are given. The simulation results indicate that the launching package of heavy load is speeded smoothly in low speed, and the drive coil can make the best of its capability of driving the package. The electromagnetic field is focused between the drive coil and the armature' outside surface, and then spreads all around. The electromagnetic force is focused on the outside of the tail of armature, the fortification of the tail of armature should be considered. It is capable of EMCVL of launching multi-types of loads by changing energies in energy storage systems or the number of stages of the launching coils suitably.

Zhang Z.,NAEI | Qu X.,NAEI | Ma D.,NAEI | Zhu D.,PLA Xuzhou Air force College | Wang L.,NAEI
2012 International Conference on Systems and Informatics, ICSAI 2012 | Year: 2012

This paper describes the characteristics of anti-radiation missile/radar target end game, and points out the disadvantages of ARM only with contact burst model. An adaptive burst strategy is put forward to estimate proximity fuze detonation delay-time, so as to improve the destruction probability. A Monte-Carlo simulation study is discussed. © 2012 IEEE.

Yu L.,Graduates Brigade NAEI | Yuan S.,NAEI | Pang Z.,Reconnaissance Communication Teaching and Research Section | Wang Y.,NAEI
Advanced Materials Research | Year: 2012

RNG (Renormalization Group) k-ε turbulent model was applied to the numerical simulation of turbulent mixing processes in the RQL gas turbine combustor, and SIMPLE algorithm was used to solve the finite difference equations. The calculated conclusions were used to analyze temperature distribution of the mixed flow field and near-wall region of the flow field, and then discuss the NO x emissions. The results show that the effect of the injector zone geometry and the jet to crossflow momentum flux ratios on the NO x emissions is obvious. The reasonable control of jet is beneficial to reduce the local high temperature area and is able to improve the distribution of the exit temperature. And then achieve the goal of reducing the environmental pollution. © (2012) Trans Tech Publications.

News Article | November 30, 2015

An “all-electric” future for city transportation fleets could significantly reduce – but not eliminate urban air pollution. With dropping battery prices and pressure to reduce air pollution in cities, increasing attention is being paid to the potential for electricity to power urban transportation fleets. Electric vehicles could eliminate local sources of air pollution including nitrogen oxides (NO ) and sulfur oxides (SOx). But, when taking a closer look at the data, it becomes clear that EVs would not eliminate the majority of local particulate matter emissions. In the “Fleet Weighted Road Transport Emission Factor 2012” database, emissions factors for transport technologies (for example, cars, buses, and trains) are published in units of grams per kilometer driven. A sample of these data – which is published by the United Kingdom’s National Atmospheric Emissions Inventory (NAEI) - is found in the chart below. According to these data, 55-95% of particulate matter air pollution (PM ) from cars driving in urban areas isn’t actually from the tailpipe. Instead, it is produced when cars are driven, via brake wear, tire wear, and road abrasion. Furthermore, diesel cars produce 74% more PM that gasoline vehicles per kilometer driven under the same driving conditions. That being said, while EVs are not truly “zero emission” vehicles, they could certainly help to reduce urban air pollution. According to a study published this summer by King’s College London, particulate matter is responsible for an estimated 3,537 premature deaths each year in the city. This number has decreased since a 2008 estimate of 4,267 annual premature deaths, in part thanks to policy interventions. While these numbers might seem high, they are much lower than the annual premature deaths resulting from exposure to nitrogen dioxide (NO ), a type of NO pollution. According to the same report, an estimated 5,879 premature deaths occur each year due to long-term to this NO .  All told, these researchers estimate that the health impacts of these two pollutants cost the UK government between £1.4 billion and £3.7 billion ($2.1 - $5.6 billion) each year. While an “all-electric” future for city transportation fleets wouldn’t eliminate urban air pollution, it could certainly make a significant positive difference.

Zhang J.,Yantai University | Gu W.,NAEI | Liu Z.,Yantai University | Chen R.,Yantai University
2012 International Conference on Systems and Informatics, ICSAI 2012 | Year: 2012

Cross-beam experiment system(CBES) [1] as a high degree nonlinear, strong coupled MIMO control system has very high application value in the engineering and military affairs. Based on the rule of constructing the global identical terminal function [2], a kind of speedy terminal function [4] is validated as the global identical terminal function and the basic theory of the global identical terminal sliding mode control is expatiated; then exponential reaching law [3] is adopted to design the controller and a variable domain fuzzy controller [7,8] is adopted to approximate parameter of reaching law. The approach can not only weaken chattering, improve speed of error convergence and precision of the controller, but also assure robustness of the system. Simulation result shows the effectiveness of the approach presented. © 2012 IEEE.

Wang C.,NAEI | Xie X.,NAEI | Qiao Y.,NAEI | Liu J.,NAEI
MATEC Web of Conferences | Year: 2015

At present ship to air missile is the main force of anti-missile. The warhead damage element' impact and penetration effect are the main factors for damaging supersonic anti-ship missile (SAM). In this paper, the damage mechanism of the anti-ship missile is studied. Dynamic initial velocity of damage elements is modeled and simulated. The four important parts of SAM with typical material are modeled and simulated based on finite element analysis (FEA). It's useful to the study of the further model of vulnerability analysis of whole anti-ship missiles. © Owned by the authors, published by EDP Sciences, 2015.

Qiu L.,NAEI | Ye W.,NAEI
Proceedings of the World Congress on Intelligent Control and Automation (WCICA) | Year: 2012

Mission planning for multi-UCAV cooperation is one of the keys to take the advantages of multiple UCAVs combating cooperatively and to maintain harmonies between the mission complexities and UCAV abilities. A distributed and concentrated composite architecture of multi-UCAV cooperation mission planning system was constructed. Based on the analysis of the cooperative UCAVs mission hierarchy, a hierarchical and iterative mission planning frame was introduced. The logic architecture of multi-UCAV cooperation mission planning system was put forward, and two key sub-problems, that is mission assignment and path planning, were analyzed. © 2012 IEEE.

Jing T.,NAEI | Yunan H.,NAEI | Zhicai X.,NAEI
Advances in Information Sciences and Service Sciences | Year: 2012

Currently, Diagnostic parameters of analog circuits fault diagnosis based on SVM are adjusted in accordance with the principle to determine the global optimum or by trial. Parameter adjustment is not considered practical diagnostic system diagnostic requirements. It can not be part of various diagnostic parameters simultaneously adjust and optimize. The results are not satisfactory. The paper presents a model of fitness function for genetic algorithm parameter optimization, It will convert the actual circuit diagnosis requires fitness indicators in the evaluation results of analog circuit fault diagnosis; In this paper, a circuit diagnosis framework for closed-loop model parameters optimization based on genetic algorithm is presented. It's all part of the system parameters to optimize simultaneously, and analyzes the convergence of the algorithm parameter search. By example the closed-loop fault diagnosis diagnosis parameter optimization framework developed under the parameters of the various parts of the impact on decision-making. This article describes the establishment of closed-loop fault diagnosis model parameter optimization framework and the search algorithm is effective and practical.

Yao Y.,NAEI | Zhao J.,NAEI | Yi W.,NAEI | Sun J.,NAEI
Advances in Intelligent and Soft Computing | Year: 2012

A method of MADM with parameter factor, attempt factor of target and value of coefficient of fleet member used in threat assessment during warship fleets' air defense is studied. With the principle of avoiding correlation redundancy, all of the attributes of target are defined as the index of those three factors: parameter factor, attempt factor of target and value factor of fleet member. The algorithm of calculating these three factors with entropy-weight is given. Results show that this method is simple and effective in threat assessment. © 2012 Springer-Verlag GmbH Berlin Heidelberg.

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