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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

作者： Chen, Wan Fu, Jiahui Hua, Jun Chen, Meiliang Dep. of Electronics and Communication Engineering Harbin Institute of Technology 92 Xidazhi St. Harbin China Science and Technology on Communication Information Security Control Laboratory 3288 Zhongshanxi St. Jiaxing Zhejiang Province China

ISBN: (纸本)9781467313032

In this paper, a novel approach is presented to calculate the lumped parameters of right/left-handed Structures. By this method, the equivalent circuit can be extracted, and the left/right handed features can be certified. Furthermore, the propagation constant of periodic structures can fit well with simulation and measurement. © 2012 IEEE.

关键词： Equivalent circuits

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A novel left-handed circularly polarized votage-controlled leaky wave antenna

A novel left-handed circularly polarized votage-controlled l...

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2012 5th Global Symposium on Millimeter-Waves, GSMM 2012

ISBN: (纸本)9781467313032

In this literature, a novel left-handed circularly polarized voltage-controlled leaky wave antenna is presented with a scanning range of 0° to -37° with a perfect axial ratio at the most time below 2 dB. The structure depends on CRLH (Composite Right/Left Handed) transmission line with a cross finger coupled line added, which gives additional performance on the farfield axial ratio. Also the principle of the structure is discussed and an equivalent circuit is presented for further study. © 2012 IEEE.

关键词： Equivalent circuits

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A resource distribution algorithm based on node factors of transmission for ad hoc network

A resource distribution algorithm based on node factors of t...

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2012 2nd International Conference on Business Computing and Global Informatization, BCGIN 2012

作者： Xu, Xiaofeng Wei, Guohua Science and Technology on Communication Information Security Control Lab. JiaXing China China Electronic Technology Group Corporation No. 36 Institute JiaXing China

ISBN: (纸本)9780769548548

Wireless communication network has such features as limited bandwidth, changeful channel and dynamic topology, etc. Ad hoc network has lots of difficulties in accessing control, bandwidth distribution, resource assign and congestion control. Therefore, a wireless resource distributing algorithm based on communication transmission performance factors is proposed in the paper. The algorithm makes quantitative and qualitative analysis for influencing factors of transmission performance, as a result, node resource distribution "relative unfairness" is introduced to realize resource re-distribution while network resource is changing. At the same time, in order to ensure fairness of data transmission and timeliness of network packets, transmitting priority levels for each data packets are established based on latency time and its original priority level in the node. The simulation results show that the algorithm can ensure fairness and timeliness of network transmission, as well as improve ad hoc network resource integrated utilization efficiency. © 2012 IEEE.

关键词： Bandwidth

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A high-resolution weak signal detection method based on stochastic resonance and superhet technology

A high-resolution weak signal detection method based on stoc...

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2012 7th International ICST Conference on communications and Networking in China, CHINACOM 2012

作者： Shi, Shuo Yin, Wanyi Yang, Mingchuan He, Mingjie National Key Laboratory of Communication System and Information Control Technology China Harbin Institute of Technology China University of Science and Technology of China China

ISBN: (纸本)9781467326995

A detection method based on the strong low-frequency weak-signal detection ability of stochastic resonance is proposed, aimed at the detection of the unknown weak signal. By mixing the unknown signal with a continuous linear changing local oscillator signal, a difference frequency signal will be generated, which will be sent to the stochastic resonance system. Thus, an obviously changed output can be obtained. Because the stochastic resonance system is extremely sensitive to low frequency, the system will have a maximum output when the local oscillator and frequency of the unknown signal are closest. The frequency of the unknown signal will be measured precisely from the local oscillator frequency and the difference frequency. It can be inferred from the theoretical analysis and numerical simulation that this method has a large detection range, high resolution, and good prospect. © 2012 IEEE.

关键词： Stochastic systems

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Classification of incomplete data using classifier ensembles

Classification of incomplete data using classifier ensembles

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2012 International Conference on Systems and Informatics, ICSAI 2012

作者： Chen, Haixia Du, Yuping Jiang, Kai Science and Technology on Electro-optical Information Security Control Laboratory Beijing China 45th Research Institute CETC Beijing China

ISBN: (纸本)9781467301992

This paper proposes a method for classification of incomplete data using neural network ensembles. In the method, the incomplete data set is analyzed and projected into a group of complete data subsets that give a full description of the known values in the data set by joining together. Those complete data subsets are then used as the training sets for the neural networks. Base classifiers are selected and integrated according to their classification accuracies and the support degrees of their training data sets to give the final predication. Compared with other methods dealing with missing data in classification, the proposed method can utilize all the information provided by the incomplete data, maintain maximum consistency of the incomplete data set and avoid the dependency on distribution or model assumptions. Experiments on two UCI datasets showed the superiority of the algorithm to other two typical treatments of missing data in ensemble learning. © 2012 IEEE.

关键词： Classification (of information)

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Detecting and adapting to drifting concepts

Detecting and adapting to drifting concepts

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2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2012

作者： Chen, Haixia Ma, Shengxian Jiang, Kai Science and Technology on Electro-optical Information Security Control Laboratory Beijing China 45th Research Institute of CETC Beijing China

ISBN: (纸本)9781467300223

The importance of incremental learning in changing environments has been acknowledged in recent years. In this paper we present an ensemble learning method for supervised learning with drifting concepts. The method employs hypothesis test as mechanism for detecting concept drift and learns a base classifier for each new training data chunk. Former classifiers deemed as usable by the hypothesis test mechanism and the new classifiers are integrated to form the final classifiers ensemble for prediction. The main focus of the work is to identify the usability of base classifiers that representing the same or similar concept with the current one, make full use of the older valid information together with the newer examples to improve classification accuracy, and avoid the interference of classifiers representing conflictive concepts with the current one. Experiments with simulated concept drift scenarios compared the proposed method with other approaches. The results showed that the method could consistently recognize different types of drift, adapt quickly to these changes to maintain its performance level, and utilize the former knowledge to improve its performance for recurring context. © 2012 IEEE.

关键词： Classification (of information)

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Sea cucumber oriented cyber physical systems

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Ruan Jian Xue Bao/Journal of Software 2013年第SUPPL.1期24卷 41-50页

作者： Du, Xiao-Zhou Jia, Bing Qiao, Jian-Zhong Lin, Shu-Kuan College of Information Science and Engineering Northeastern University Shenyang 110004 China Science and Technology on Underwater Test and Control Laboratory Dalian 116013 China Communication Engineering Design and Research Institute of the General Staff of PLA Shenyang 110005 China

Traditionally, sea cucumber production relies heavily on human labors which results in low production efficiency and inability to meet the demands of a rapidly growing market. To address this problem, this paper brings the idea of cyber physical systems (CPS) into aquatic areas. This paper provide a detailed analysis of the theory and characteristics of CPS along with its practical significance, and construct a physical information fusion system for sea cucumber production. The system is designed according to the CPS architecture, which includes the environmental monitoring subsystem, the information processing and transmission subsystem, the process control subsystem and the remote control center. In accordance with the characteristics of interaction between physics and information, this paper models and verifies the physical process by using the theory of automata, which ensures the reliability of the overall system. The deployment of the main parts of the system has been completed. The observation data indicates that, the system can be used to effectively monitor sea cucumber production. The system also has good scalability. Through in-depth cooperation with experts in the field, we believe it can be extended to be used in many other applications in water environment. © 2013 ISCAS.

关键词： Cyber Physical System

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Impacts of subsidy policies on vaccination decisions in contact networks

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Physical Review E 2013年第1期88卷 012813-012813页

作者： Hai-Feng Zhang Zhi-Xi Wu Xiao-Ke Xu Michael Small Lin Wang Bing-Hong Wang School of Mathematical Science Anhui University Hefei 230039 China Department of Electronic and Information Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China Institute of Computational Physics and Complex Systems Lanzhou University Lanzhou 730000 China College of Information and Communication Engineering Dalian Nationalities University Dalian 116605 China School of Mathematics and Statistics University of Western Australia Crawley Australia Adaptive Networks and Control Laboratory Department of Electronic Engineering Fudan University Shanghai 200433 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

To motivate more people to participate in vaccination campaigns, various subsidy policies are often supplied by government and the health sectors. However, these external incentives may also alter the vaccination decisions of the broader public, and hence the choice of incentive needs to be carefully considered. Since human behavior and the networking-constrained interactions among individuals significantly impact the evolution of an epidemic, here we consider the voluntary vaccination on human contact networks. To this end, two categories of typical subsidy policies are considered: (1) under the free subsidy policy, the total amount of subsidy is distributed to a certain fraction of individual and who are vaccinated without personal cost, and (2) under the partial-offset subsidy policy, each vaccinated person is offset by a certain amount of subsidy. A vaccination decision model based on evolutionary game theory is established to study the effects of these different subsidy policies on disease control. Simulations suggest that, because the partial-offset subsidy policy encourages more people to take vaccination, its performance is significantly better than that of the free subsidy policy. However, an interesting phenomenon emerges in the partial-offset scenario: with limited amount of total subsidy, a moderate subsidy rate for each vaccinated individual can guarantee the group-optimal vaccination, leading to the maximal social benefits, while such an optimal phenomenon is not evident for the free subsidy scenario.

关键词： Impacts policies decisions Prophylactic vaccination subsidy Contact networks Policies

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Study on mechanisms of secure data aggregation based on weighted fitting analysis

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Ruan Jian Xue Bao/Journal of Software 2013年第SUPPL.1期24卷 108-116页

作者： Li, Ping Yang, Wu Xie, Jin-Yang Zhu, Hong-Song Zhang, Yong-Guang Li, Xiao-Feng School of Computer and Telecommunications Changsha University of Science and Technology Changsha 410114 China State Key Laboratory of Information Security Institute of Information Engineering The Chinese Academy of Sciences Beijing 100093 China Software Development Center Beijing Institute of Control Engineering Beijing 100190 China

Cryptographic approaches are vulnerable to impersonation attacks when nodes become compromised. Meanwhile, trust-based judgment and confirmation of cluster heads in WSN imposes higher communication cost. Trust management and authentication on cluster heads in WSN are essential in research on the mechanisms of secure data aggregation at present. In this paper, an energy attenuation model is adopted to describe event sensing in a kind of WSNs. Approximate evaluation on distance between occurring event and nodes within a cluster is achieved in case the location of the event is not known. Distribution properties of data points with clustering characteristics based on fitting curve construction are theoretically analyzed. In addition, the mechanism on trust authentication on cluster heads is also refined. Experimental results show that the proposed mechanism has much better performance on fitting accuracy and malicious CH recognition than previous works. © 2013 ISCAS.

关键词： Authentication

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Mechanism analysis of protocols based on the FPCPN model

Journal of Digital Information Management

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Journal of Digital information Management 2012年第2期10卷 86-93页

作者： Wang, Wei Science and Technology on Communication Information Security Control Laboratory China No. 36 Research Institute of CETC Jiaxing Zhejiang 314001 China

Focusing on the protection of privacy and non- publicity of special networks, the CPN model is extended to PCPN by the protocol factor and the formal model. The FPCPN (Formal Protocol Colored Petri Net) is presented to analyze the operation mechanism of protocols. It is introduced by four steps, such as the whole structure, the network element conversion, the conditions of transition triggers/executions and sub-system partitions. Finally, the feasibility and efficiency of FPCPN is validated by an example.

关键词： Petri nets

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