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Two-dimensional color uncorrelated principal component analysis for feature extraction with application to face recognition

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2012 International Conference on service-Oriented computing, ICSOC 2012

作者： Zhao, Cairong Miao, Duoqian Department of Computer Science and Technology Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing Ministry of Education Shanghai 7201804 China Ministry of Education Nanjing 210094 China

ISBN: (纸本)9783319029603

This paper proposes a two-dimensional color uncorrelated principal component analysis algorithm(2DCUPCA) for unsupervised subspace learning directly from color face images. The 2DCUPCA can be used to explore uncorrelated properties among color-based features, which contain minimum redundancy and ensure linear independence among features. Furthermore, the proposed 2DCUPCA provided the theoretical foundations analysis and proved the uncorrelated property between color-based features in theory. This makes it sure that the extracted features directly from three color image matrices will be uncorrelated. Finally, experimental results on the AR and FRGC-2 color face databases show that 2DCUPCA achieves better recognition performance than other color face recognition methods. © Springer International Publishing 2013.

关键词： Principal component analysis

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Research on real solutions number of the SHEPWM equations based on the mechanical proving and groebner bases theory

Research on real solutions number of the SHEPWM equations ba...

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Chinese Control Conference (CCC)

作者： Ke-hu Yang Ru-yi Yuan Wen-sheng Yu School of Mechanical Electronic & Information Engineering China University of Mining and Technology Xuzhou Jiangsu CN Integrated Information System Research Center Institute of Automation Institute of Automation Chinese Academy of Sciences Beijing Beijing CN Shanghai Key Laboratory of Trustworthy Computing East China Normal University Shanghai CN

The real solutions number of the switching angles for the SHEPWM inverter has been discussed in this paper. Firstly, the SHEPWM equations were transformed to polynomial equations with inequality constrains by using the multiple-angle formulas and variables substitution, then, the equivalent groebner bases of the polynomial equations were computed, finally, the real solutions number of the SHEPWM equations were discussed with the mechanical proving theory and algorithm of the semi-algebraic systems. The conclusion of there is only one solutions for the single phase SHEPWM inverter with less than 7 switching points in a quarter period and the theoretical maximum modulation ratio were derived for the first time. The experiments and simulations verify the correctness of these conclusions.

关键词： Inverters Switches Harmonic analysis Polynomials Mathematical model Modulation

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Model predictive control for HVAC systems - A review

Model predictive control for HVAC systems - A review

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2013 IEEE International Conference on Automation Science and Engineering, CASE 2013

作者： Kwadzogah, Roger Zhou, Mengchu Li, Sisi Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07013 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China

ISBN: (纸本)9781479915156

The world faces an energy problem. Oil supply is gradually running out. Its use is polluting the planet with greenhouse gas. Most alternative energy sources also pose some environmental problems. Hence the efficient use of energy must be an integral part of any solution to them. Whenever possible, one must use advanced control engines and technologies to achieve the highest energy efficiency. In Heating Ventilation and Air Conditioning (HVAC) industry, much research has identified a number of energy-saving control methods. Derived from optimal control theory, Model Predictive Control (MPC) is one of them. This paper presents a comprehensive review of its applications to HVAC systems. © 2013 IEEE.

关键词： Model predictive control

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Cough signal recognition with gammatone cepstral coefficients

Cough signal recognition with gammatone cepstral coefficient...

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2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

作者： Liu, Jia-Ming You, Mingyu Li, Guo-Zheng Wang, Zheng Xu, Xianghuai Qiu, Zhongmin Xie, Wenjia An, Chao Chen, Sili Key Laboratory of Embedded System and Service Computing Department of Control Science and Engineering Tongji University Shanghai 201804 China Department of Respiratory Medicine Shanghai 200065 China

ISBN: (纸本)9781479910434

Cough Recognition is a valuable classification problem in healthcare. Generally, feature representation contributes a lot to the overall classifying performance. In this paper, a novel feature extraction method, Gammatone Cepstral Coefficients (GTCC), is investigated for cough recognition. The accuracy of GTCC comparing with MFCC is evaluated on a designed cough dataset following a 10 fold cross-validation schemes. Considering the imbalance of that dataset, weighted SVM is applied as the base classifier. The results indicate that GTCC surpass MFCC in modeling cough signals. With combination of GTCC and MFCC, a better performance is achieved. This paper provides a better feature representation prototype in cough recognition. © 2013 IEEE.

关键词： Feature extraction

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Real-Time Communication Method for mHealth Base on Extended XMPP Protocol

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Communications and Network 2013年第3期5卷 590-595页

作者： Chenjie Shi Yu Fang The Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China

Considering characteristic of mHealth communication and problems of existing methods, this paper presents a real-time communication method for mHealth based on extended XMPP protocol. The method can maintain the role status efficiently and reduce data latency during the communication process. Meanwhile, it can be extended flexibly to meet increasing communication demands of mHealth services. Furthermore, a system framework is presented to support telemonitoring scene. Finally, system implementation and feasibility tests verify the effectiveness of the method and framework.

关键词： mHealth XMPP Protocol Real-Time Communication

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An enhanced two-factor user authentication in wireless sensor networks

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Telecommunication systems 2013年第1期55卷 105-113页

作者： Yuan, Jian-Jun Key Laboratory of Embedded System and Service Computing of Ministry of Education Tongji University Shanghai China

Since wireless sensor networks (WSN) are often deployed in an unattended environment and sensor nodes are equipped with limited computing power modules, user authentication is a critical issue when a user wants to access data from sensor nodes. Recently, M.L. Das proposed a two-factor user authentication scheme in WSN and claimed that his scheme is secure against different kinds of attack. Later, Khan and Alghathbar (K-A) pointed out that Das’ scheme has some security pitfalls and showed several improvements to overcome these weaknesses. However, we demonstrate that in the K-A-scheme, there is no provision of non-repudiation, it is susceptible to the attack due to a lost smart card, and mutual authentication between the user and the GW-node does not attained. Moreover, the GW-node cannot prove that the first message comes from the user. To overcome these security weaknesses of the K-A-scheme, we propose security patches and prove our scheme.

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Cluster synchronization of nonlinearly coupled networks via periodically intermittent pinning control

Cluster synchronization of nonlinearly coupled networks via ...

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Chinese Control Conference (CCC)

作者： Xiwei Liu Jiujun Cheng Department of Computer Science and Technology the Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Department of Computer Science and Technology the Key Laboratory of Embedded System Service Computing Shanghai China

In this paper, the cluster synchronization problem for nonlinearly coupled networks under periodically intermittent pinning control is studied. At first, a sufficient condition to guarantee cluster synchronization is presented. Next, an adaptive intermittent control algorithm is designed to the control strength and its validity is rigorously proved. Finally, some numerical examples are presented to demonstrate the correctness of obtained theoretical results.

关键词： Synchronization Couplings Symmetric matrices Adaptive systems Educational institutions Equations Neural networks

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Co-assembly of nanoparticles and block copolymers into hybrid micellar aggregates

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Recent Patents on Materials Science 2013年第1期6卷 40-58页

作者： Li, Weikun Wang, Jianying Liang, Ruijing Deng, Renhua Zhu, Jintao Key Laboratory of Large-Format Battery Materials and System Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology No. 1037 Luoyu Road Wuhan Hubei 430074 China Hubei Key Laboratory of Materials Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China

In this review, we outline the most recent publications and patents focusing on hybrid micellar aggregates comprising nanoparticles (NPs) and block copolymers (BCPs) in the last decade, which have attracted much interest owing to their potential applications in the fields of optics, electronics, sensors, drug delivery and release, bioimaging, targeting, and catalysis. Among them, precise location and assembly of NPs in polymers are of great importance in realizing the formation of nanocomposites with high performances. BCPs assembly offers a simple and efficient route to direct and locate NPs in polymer matrix. First, we will outline different synthetic strategies for directing inorganic NPs into the micellar aggregates based on co-assembly of NPs and BCPs. We will then discuss principles and possible mechanisms for precisely regulating NPs in polymer microdomains of BCPs based on the experimental and theoretical results. Potential applications of the hybrid micellar aggregates will finally be discussed, followed by current and future developments of this emerging area. © 2013 Bentham Science Publishers.

关键词： Nanoparticles

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Vibration model based multi-path traffic allocation algorithm for wireless mesh networks

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Journal of Information and Computational Science 2013年第5期10卷 1253-1260页

作者： Yuan, Zhenxia Yu, Ruiguo Zhao, Mankun Du, Xiuping Lei, Ming Dong, Wenyong School of Computer Science and Technology Tianjin University Tianjin 300072 China School of International Education Tianjin University Tianjin 300072 China Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology Tianjin University of Technology Tianjin 300191 China Key Laboratory of Computer Vision and System Ministry of Education Tianjin 300191 China Computer School Wuhan University Wuhan 430079 China

Mesh Networks (WMNs) is a promising network access technology. As WMNs' applications become more and more popular, the number of users grows quickly and the quality of service needs to be improved. When we try to analyze the load on different paths using the simplest multi-path routing algorithms we find that the load changes just like Simple Harmonic Motion, which inspires us to use physic model to analyze the traffic allocation problems. And then we design a new traffic allocation algorithm and the experiment shows that the algorithm can reduce the path delay variance. © 2013 Binary Information Press.

关键词： Quality of service

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Exploiting robustness in Petri net-based closed-loop systems to accommodate control specification changes

Exploiting robustness in Petri net-based closed-loop systems...

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2013 IEEE International Conference on Automation Science and Engineering, CASE 2013

作者： Li, Jun Zhou, Mengchu Dai, Xianzhong Key Laboratory of Measurement and Control of Complex Systems of Engineering China Ministry of Education Automation School of Southeast University Nanjing 210096 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China

ISBN: (纸本)9781479915156

Supervisory control reconfiguration has been paid more attention due to its capacity of handling the uncertainties including resource failures, capability degradation, and task changes in discrete event systems. However, the robustness of closed-loop systems in response to some specification changes was not addressed in the prior studies. This paper presents a reconfiguration method based on Petri nets and integer programming for supervisory control of resource allocation systems with changeable resource allocation relationships (control specifications). First, we propose a reconfiguration mechanism. It updates the P-invariant-based supervisor and evolves the state of the closed-loop system. The latter adapts to the certain changes in specifications by the self-regulation of the closed-loop system's state. It utilizes fully the robustness in a closed-loop system and avoids unnecessary modification of a supervisor. Then, a reconfiguration model with robustness analysis is proposed based on integer programming. By using it, a firing sequence of transitions as a serial of reconfiguration actions can be found. The execution of the sequence implements the state evolution of a closed-loop system. There is no need for making additional efforts to analyze state reachability of the system, since the firability condition of transitions is incorporated into the model. Finally, the method is illustrated through an example of a hospital emergency service system. © 2013 IEEE.

关键词： Closed loop systems

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