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4th IEEE International Conference on Electronics Information and Emergency Communication, ICEIEC 2013

作者： Xiao, Qingli Fu, Hongzhou Zheng, Lu Zhang, Dexue College of Information Science and Engineering Shandong University of Science and Technology Qingdao 266590 China State-Key Lab. of ASIC and System Fudan University Shanghai 200240 China

ISBN: (纸本)9781467349314

Topological structure is an important part of the design of network on chip systems. The majority of current NoC architectures employ mesh topology, but at some practical application, NoC systems often integrate a number of heterogeneous blocks, or some fabrication faults, reliability issues, may lead to the need of irregular topologies. Consequently, simplistic routing techniques such as XY scheme can not be employed in irregular topologies. This paper presents an efficient specific routing scheme for the irregular mesh network which can be guaranteed for the connection in irregular topologies. This paper applies routing tables (RT) to realize the algorithm and use OVP (Open Virtual Platforms)+ TLM (Transaction Level Modeling)+systemC to create a virtual platform, achieving a 16 x16 irregular mesh topology of heterogeneous systems. Finally the routing scheme is applied to test specific real application network instances, and the result shows its connectivity and efficiency. © 2013 IEEE.

关键词： Network-on-chip

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Second-order consensus seeking in multi-agent systems with nonlinear dynamics over random switching directed networks

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IEEE Transactions on Circuits and systems I: Regular Papers 2013年第6期60卷 1595-1607页

作者： Li, Huaqing Liao, Xiaofeng Lei, Xinyu Huang, Tingwen Zhu, Wei State Key Lab. of Power Transmission Equipment and System Security and New Technology College of Computer Science Chongqing University Chongqing 400044 China TexasAandM University at Qatar Doha P.O. Box 23874 Qatar Research Center of System Theory and Application Chongqing University of Posts and Telecommunications Chongqing 400065 China

This paper discusses the second-order local consensus problem for multi-agent systems with nonlinear dynamics over dynamically switching random directed networks. By applying the orthogonal decomposition method, the state vector of resulted error dynamical system can be decomposed as two transversal components, one of which evolves along the consensus manifold and the other evolves transversally with the consensus manifold. Several sufficient conditions for reaching almost surely second-order local consensus are derived for the cases of time-delay-free coupling and time-delay coupling, respectively. For the case of time-delay-free coupling, we find that if there exists one directed spanning tree in the network which corresponds to the fixed time-averaged topology and the switching rate of the dynamic network is not more than a critical value which is also estimated analytically, then second-order dynamical consensus can be guaranteed for the choice of suitable parameters. For the case of time-delay coupling, we not only prove that under some assumptions, the second-order consensus can be reached exponentially, but also give an analytical estimation of the upper bounds of convergence rate and the switching rate. Finally, numerical simulations are provided to illustrate the feasibility and effectiveness of the obtained theoretical results. © 2004-2012 IEEE.

关键词： Multi agent systems

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Abnormal network traffic detection approach based on alive entropy

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Tongxin Xuebao/Journal on Communications 2013年第SUPPL.2期34卷 51-57页

作者： Mu, Xiang-Kun Wang, Jin-Song Xue, Yu-Feng Huang, Wei Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300384 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300384 China

A novel alive entropy-based detection approach was proposed, which detects the abnormal network traffic based on the values of alive entropies. The alive entropies calculated based on the NetFlow data coming from the network traffic of input and output of a whole system, which is essentially a monitored network. In order to decrease false positive rate of abnormal network traffic, different scales are selected to compute the values of alive entropies in different sizes of network traffic. With the low false positive rate of abnormal network traffic, the abnormal network traffic can be effectively detected. Experiments carried out on a real campus network were used to evaluate the effectiveness of the proposed approach. A comparative study illustrates that the proposed approach may easily detect the abnormal network traffic with random characteristics in comparison with some "conventional" approaches reported in the literatures.

关键词： Entropy

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Research of deep packet inspection system based on the MapReduce

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Journal of Computational Information systems 2013年第7期9卷 2587-2594页

作者： Wang, Jinsong Wei, Jun Lin, Sheng Huang, Wei Tianjin Key Lab. of Intelligent Computing and Novel Software Technology Tianjin University of Technology Tianjin 300384 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin University of Technology Tianjin 300384 China

In this paper, we propose a deep packet inspection system based on the MapReduce. The MapReduce which is a parallel distributed programming model developed by Google applies the technology of deep packet inspection. Network protocol analysis technique is invoked to realize detect, effectively reducing the packet number to be matched. Furthermore, cache technology is adopted to store attack signature from database in order to reduce the frequency of reading the rules from library file which improved the detection efficiency. Experimental results show that effectiveness of the proposed system with the high-speed network traffic. Copyright © 2013 Binary Information Press.

关键词： MapReduce

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Design of a unidirectional joint with adjustable stiffness for energy efficient hopping leg

Design of a unidirectional joint with adjustable stiffness f...

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IEEE International Conference on Robotics and Biomimetics

作者： Peng Yin Mantian Li Wei Guo Pengfei Wang Lining Sun State Key Lab. of Robotics and System Harbin Institute of Technology China

ISBN: (纸本)9781479927456

In this paper we introduced a unidirectional joint with adjustable stiffness (UJAS) for legged robot applications. It allowed the robotic leg to change dynamic property by tuning joint parameters. The joint was designed to provide large compliant motion range and sufficient energy storage capacity for passive gaits. In order to avoid undesired leg vibration during flying phase we brought about the unidirectional design with mechanical stops. Rotational stiffness output and the neutral position could be controlled independently allowing different leg configurations and dynamic features. The joint design was based on lever mechanism with torsion springs providing necessary compliant. It is experimentally tested that the joint design could provide different stiffness output characters and it has the potential to be used in legged robotic systems.

关键词： Joints Springs Legged locomotion Torque Shafts Tuning

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Joint filtering scheme of multistation GSM interference for UHF-band radar

Joint filtering scheme of multistation GSM interference for ...

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2013 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2013

作者： Shi, Longfei Ren, Bo Li, Yongzhen Zhao, Feng Xiao, Shunping State Key Lab. of Complex Electromagnetic Environment Effects on Electronics and Information System Changsha 410073 China School of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9781479910274

UHF-band radar, which is widely used in early warning, has the unique advantage on target detection. However it can be seriously interfered by the GSM base station with the same frequency channel in practical application. Nowadays the solution is just avoiding the frequency which GSM used. However, with the increasing number of GSM clients, the spectrum which can be used by UHF-radar will be compressed inevitable. It not only leads to the frequency resource wasted, but also impacts the detection ability of UHF-band radar. A polarization-space joint filtering scheme is proposed in this paper, which is based on the antenna configuration with orthogonal dual-polarization array elements and main, auxiliary arrays. By employing this filtering scheme, the radar can detect targets effectively, even there is much interference in the main lobe and side lobe simultaneously. The detection ability of UHFband radar will be effectively improved in complex electromagnetic environment by using this method. In this paper, the model of signal received by array is established, and the recursive filtering algorithm is designed. The simulation is finally done to validate. © 2013 IEEE.

关键词： Antennas

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Advanced polarization estimation method using Spatial Polarization Characteristic of antenna

Advanced polarization estimation method using Spatial Polari...

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2013 43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013

作者： Chang, Yuliang Shi, Longfei Dong, Jian Wang, Xuesong Pingxiao, Shun State Key Lab. of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology Changsha 410073 China College of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9782874870316

The polarization of radar antenna vary with scan direction. This phenomenon is called Spatial Polarization Characteristic (SPC) of antenna. Based on the SPC of single polarized antenna, a novel polarization estimation method is established. Comparing with the traditional estimation method, this one has the following advantages: (i) It does not need dual-polarization channels to estimate the signal polarization;(ii) The polarization and angle of arriving(AOA) of a periodic signal can be estimated simultaneously;(iii) The full-polarization pattern of the antenna can be matched automatically during the estimation. The feasibility of this method is proved by simulation. © 2013 European Microwave Association.

关键词： Multiple signal classification

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Advanced polarization estimation method using Spatial Polarization Characteristic of antenna

Advanced polarization estimation method using Spatial Polari...

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2013 10th European Radar Conference, EuRAD 2013 - Held as Part of 16th European Microwave Week, EuMW 2013

ISBN: (纸本)9782874870330

关键词： Multiple signal classification

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Simulation error characteristics of grey model GM(1,1) under translation transformation

Simulation error characteristics of grey model GM(1,1) under...

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2013 5th International Conference on Computational Intelligence, Modelling and Simulation, CIMSim 2013

作者： Wang, Yong Song, Qinbao Zeng, Bo Liu, Jin Department of Computer Science and Technology Ocean University of China Qingdao China State Key Lab. of Software Engineering Wuhan University Wuhan China Department of Computer Science and Technology Xi'An Jiaotong University Xi'an China Department of Industry Management and System Engineering University of South Florida Tampa United States State Key Lab. of Software Engineering Computer School Wuhan University Wuhan China

ISBN: (纸本)9780769551555

To reveal the change law of the simulation error of grey model GM(1,1) with translation transformation applying on the original sequence, in this paper, the experiments based on 55 real world data sequences have been conducted to study how the translation transformation influences the grey models' error characteristics. The results show that a larger translation transformation can make the total error between the model sequence and the original sequence toward zero, and the model precision remains independent. The conclusion implies that we can use translation transformation to change the original sequence data level to simplify the model building without changing the model precision. © 2013 IEEE.

关键词： Errors

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The optimal LCMV beamformer under multiple desired signals case

The optimal LCMV beamformer under multiple desired signals c...

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IET International Radar Conference 2013

作者： Xu, Zhen-Hai Chen, Ming-Zui Rao, Bin State Key Lab. of Complex Electromagnetic Environ. Effects on Electron./Info. System Changsha 410073 China School of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China

ISBN: (纸本)9781849196031

The optimal multiple linear constraint minimal variance (LCMV) beamformer is presented under multiple desired signals case. The theoretical solutions of the optimal weighted vector and maximum signal-to-interference-plus-noise-ratio (SINR) are derived by using variable substitution method. Simulation results show that the algorithm is superior to the traditional LCMV approach in the SINR, computational load and applicability. The algorithm can be applied in the area of radar tracking of low-angle targets and polarization radar signal processing.

关键词： Signal to noise ratio

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