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IEEE International Conference on Communications (ICC)

作者： Y. Shinohara H. Shimonishi H. Tode K. Murakami Department of Information Networking Graduate School of Information Science and Technology Osaka University Suita Osaka Japan System Platforms Research Laboratory NEC Corporation Limited Kawasaki Kanagawa Japan Department of Computer Science and Intelligent Systems Graduate School of Engineering Osaka Prefecture University Sakai Osaka Japan

We propose a programmable and scalable traffic management scheme. Programmable traffic management at high-speed routers is difficult because programmability and high-speed packet processing have involved a serious tradeoff. To attain both, the new scheme combines control programs at a control server and simple packet handling functions, such as sampling packet headers and discarding packets, at routers. Therefore, by installing appropriate control programs into the server, a variety of active queue management schemes, per-flow bandwidth management schemes, DoS mitigation schemes, and so on, are achieved. One of the main contributions of this paper is its proposal of a statistical scheme for handling flows. As only a fraction of complete flow information stored at the control server is loaded into the router's flow table and it is replaced cyclically, the proposed scheme scales more than the router's flow table capacity. Our simulation results indicate that the scheme provides efficient traffic management, per-flow WFQ emulation in our example, even with very small flow tables compared to the number of concurrently active flows. Furthermore, we discuss implementation issues with the proposed scheme and reveal that the processing cost at the server and router is sufficiently small for use with 10 Gbps links.

关键词： Traffic control Quality of service Communication system traffic control Electronic mail Costs Probability computer network management Technology management engineering management Network servers

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Single-trial analysis of cortical oscillatory activities during voluntary movements using empirical mode decomposition (emd)-based spatiotemporal approach

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Annals of Biomedical engineering 2009年第8期37卷 1683-1700页

作者： Lee, Po-Lei Shang, Li-Zen Wu, Yu-Te Shu, Chih-Hung Hsieh, Jen-Chuen Lin, Yung-Yang Wu, Chi-Hsun Liu, Yu-Lu Yang, Chia-Yen Sun, Chia-Wei Shyu, Kuo-Kai Department of Electrical Engineering National Central University No. 300 Jhongda Rd. Jhongli City Taoyuan County 32001 Taiwan Integrated Brain Research Laboratory Department of Medical Research and Education Taipei Veterans General Hospital Taipei Taiwan Institute of Brain Science National Yang-Ming University Taipei Taiwan Institute of Radiological Science National Yang-Ming University Taipei Taiwan Department of Otolaryngology Taipei Veterans General Hospital Taipei Taiwan National Yang-Ming University School of Medicine Taipei Taiwan Center for Neuroscience National Yang-Ming University Taipei Taiwan Neurological Institute Taipei Veterans General Hospital Taipei Taiwan Institute of Computer Communication and System Engineering Ching-Yun University Taoyuan Taiwan Biophotonics Interdisciplinary Research Center National Yang-Ming University Taipei Taiwan Institute of Biophotonics National Yang-Ming University Taipei Taiwan

This study presents a method based on empirical mode decomposition (EMD) and a spatial template-based matching approach to extract sensorimotor oscillatory activities from multi-channel magnetoencephalographic (MEG) measurements during right index finger lifting. The longitudinal gradiometer of the sensor unit which presents most prominent SEF was selected on which each single-trial recording was decomposed into a set of intrinsic mode functions (IMFs). The correlation between each IMF of the selected channel and raw data on other channels were created and represented as a spatial map. The sensorimotor-related IMFs with corresponding correlational spatial map exhibiting large values on primary sensorimotor area (SMI) were selected via spatial-template matching process. Trial-specific alpha and beta bands were determined in sensorimotor-related oscillatory activities using a two-spectrum comparison between the spectra obtained from baseline period (-4 to -3 s) and movement-onset period (-0.5 to 0.5 s). Sensorimotor-related oscillatory activities were filtered within the trial-specific frequency bands to resolve task-related oscillatory activities. Results demonstrated that the optimal phase and amplitude information were preserved not only for alpha suppression (event-related desynchronization) and beta rebound (event-related synchronization) but also for profound analysis of subtle dynamics across trials. The retention of high SNR in the extracted oscillatory activities allow various methods of source estimation that can be applied to study the intricate brain dynamics of motor control mechanisms. The present study enables the possibility of investigating cortical pathophysiology of movement disorder on a trial-by-trial basis which also permits an effective alternative for participants or patients who can not endure lengthy procedures or are incapable of sustaining long experiments. © 2009 Biomedical engineering Society.

关键词： Intrinsic mode functions

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Wave-front arrival time analysis using wide-area frequency measurements

Wave-front arrival time analysis using wide-area frequency m...

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IEEE General Meeting Power& Energy Society

作者： Jing Ma Jinlong Li Zengping Wang Jie Wu Tao Xia Lang Chen Yilu Liu School of Electrical and Electronic Engineering North China Electric Power University Beijing China Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute Blacksburg VA USA Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China Zhejiang Electric Power Design Institute Hangzhou China

Due to the influence of the local noise at the distribution level, the frequency curve obtained from the frequency disturbance recorder (FDR) unit is too non-stationary to observe its wave-front directly, which causes some problems in the event location estimation method. In this paper, a morphological filter (MF) is employed to extract the wave-front arrival time and the trend of the frequency curve. With the help of the MF, the accuracy of the event location method is greatly improved.

关键词： Frequency measurement Frequency estimation Power system measurements Network servers Wide area measurements Filters Web server Global Positioning system Frequency synchronization Power system dynamics

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Optimization dynamics evaluation mode for particle swarm algorithm

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Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology 2009年第SUPPL. 1期33卷 1-6页

作者： An, Jing Yang, Dong-Sheng Wang, Lei Kang, Qi Wu, Qi-Di College of Electronics and Information Engineering Tongji University Shanghai 201804 China School of Mechanical and Automation Engineering Shanghai Institute of Technology Shanghai 200235 China Embedded System and Computer-service Key Laboratory of Ministry of Education Tongji University Shanghai 201804 China

Based on the fundamental evaluation index system of intelligent optimization, a type of optimization dynamics evaluation mode for particle swarm algorithm is presented here. The mode is used for general optimization performance and particles'population dynamics. In the evaluation mode, primary indexes include optimum value, population dynamic aggregation, population center convergence and population diversity. Numerical optimization simulation based on several benchmarks is studied, and the typical population dynamic results of primary indexes show that the proposed optimization dynamics evaluation mode is effective.

关键词： Population dynamics

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A high capacity 3D steganography algorithm

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IEEE transactions on visualization and computer graphics 2009年第2期15卷 274-84页

作者： Min-Wen Chao Chao-hung Lin Cheng-Wei Yu Tong-Yee Lee Computer Graphics Group Visual System Laboratory Department of Computer Science and Information Engineering National Cheng-Kung University Tainan Taiwan R.O.C. cvivians@***

In this paper, we present a very high-capacity and low-distortion 3D steganography scheme. Our steganography approach is based on a novel multilayered embedding scheme to hide secret messages in the vertices of 3D polygon models. Experimental results show that the cover model distortion is very small as the number of hiding layers ranges from 7 to 13 layers. To the best of our knowledge, this novel approach can provide much higher hiding capacity than other state-of-the-art approaches, while obeying the low distortion and security basic requirements for steganography on 3D models.

关键词： Three Dimensional Graphics And Realism computer Graphics

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Integrated verification model atsFPM based on functional, time and spatial constraints

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Jisuanji Xuebao/Chinese Journal of computers 2009年第4期32卷 740-750页

作者： Niu, Jun Zeng, Guo-Sun Chen, Bo Department of Computer Science and Technology Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing of Ministry of Education Shanghai 201804 China College of Information Engineering Zhejiang Business Technology Institute Ningbo 315012 China

Nowadays complex information system's integrated formal models of function verification and performance evaluation lack properties constraint about space aspect. This paper presents an integrated verification model atsFPM by defining a space requirement function over the states of the considered information system. The patterns of paths which are based on regular expressions is proposed in order to specify the functional specifications. The syntax and semantic of the model atsFPM is defined. A conversion product model is obtained by the combination of the system model and the automaton of the pattern of paths which expresses the functional specifications. The verification of the model atsFPM is tackled by the performance verification technique of Markov Reward Model. Experimental results show that the atsFPM model and its verification approach can satisfy the modeling of information system and verification of functional and performance specifications.

关键词： Information systems

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Adaptive Parallel Model Combination for Reduced Environmental Mismatch in Noisy Speech Recognition

Adaptive Parallel Model Combination for Reduced Environmenta...

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International Conference on Electronic Design

作者： Tan, S. S. Ahmad, Abdul Manan Software Engineering Department Faculty of Computer Science and Information System University of Technology Malaysia Malaysia Speech Laboratory Faculty of Computer Science and Information System University of Technology Malaysia Malaysia

ISBN: (纸本)9781424423149

Due to environmental mismatch, speech recognition systems often exhibit drastic performance degradation in noisy conditions. This paper presents a model-based technique termed Adaptive Parallel Model Combination (APMC) which compensates the initial acoustic models to reduce the discrepancy. APMC used the well-known PMC technique to composite a set of corrupted speech models, while fine tuning the mean parameter of the models using a transformation-based adaptation technique called Maximum Likelihood Spectral Transformation (MLST). Evaluated on a context-independent phone recognition task, APMC was found to be superior to both PMC and MLST, especially in non-stationary noisy conditions. On average, APMC has achieved 48.81% improvement over the initial models, whereas PMC and MLST have improved the accuracy by 34.12% and 35.23% respectively.

关键词： Maximum likelihood

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Process-aware service composition based on Petri net

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Journal of Harbin Institute of Technology (New Series) 2008年第SUPPL.期15卷 162-166页

作者： Sun, Ping Li, Xiangmei Department of Computer Science and Engineering Tongji University Shanghai 201804 China Embedded System and Service Computing Key Laboratory Shanghai 201804 China

One of the most promising advantages of Web service technology is the possibility of creating value-added services by combining existing ones. A major challenge is how to discover and select concrete service according to user requirements. This paper addresses the topic of service discovery composite Web services. The main feature is that we take the process model as well as service profile into account. Firstly, the process models of Web services are translated into Petri nets. Based on this, we propose a service matchmaking algorithm, via comparing the functionality compatibility and process consistency, thus leading to more accurate matchmaking.

关键词： Web services

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Color Effect on the Face Recognition with Spatial Resolution Constraints

Color Effect on the Face Recognition with Spatial Resolution...

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IEEE International Symposium on Multimedia

作者： Choi, Jae Young Yang, Seungji Ro, Yong Man Plataniotis, Konstantinos N. Image and Video System Laboratory Information and Communication University South Korea Department of Electrical and Computer Engineering University of Toronto Canada

ISBN: (纸本)9781424440894

In the practical face recognition (FR) applications, low-resolution faces (20 x 20 pixels or less) are commonly encountered and negatively impact on reliable performance. To overcome low-resolution face problem, we show that face color can significantly improve the performance compared to intensity-based features. The contribution of this paper is twofold. First, a new metric called 'variation ratio gain' (VRG) is proposed to theoretically prove the significance of color effect on low-resolution faces. Second, we conduct extensive performance comparison studies. In particular, 3,192 color facial images corresponding to 341 subjects, collected from three standard CMU PIE, FERET, and XM2VTSDB face databases, were used to perform comparative studies of color effect on various face resolutions. Experimental results verified that face color feature improves the degraded recognition rate due to low-resolution faces by at least an order of magnitude over intensity-based features.

关键词： Color face recognition Face resolution Identification Variation ratio gain Verification

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Apical-dominant particle swarm optimization

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Progress in Natural Science:Materials International 2008年第12期18卷 1577-1582页

作者： Zhihua Cui~(a,b) Xingjuan Cai~b Jianchao Zeng~b Guoji Sun~a a State Key laboratory for Manufacturing systems engineering,Xi’an Jiaotong University,Xi’an 710049,China b Division of system Simulation and computer Application,Taiyuan University of Science and Technology,Taiyuan 030024,China [a]State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Xi’an 710049 China [b]Division of System Simulation and Computer Application Taiyuan University of Science and Technology Taiyuan 030024 China

Particle swarm optimization (PSO) is a new stochastic population-based search methodology by simulating the animal social behaviors such as birds flocking and fish *** improvements have been proposed within the framework of this biological assumption. However,in this paper,the search pattern of PSO is used to model the branch growth process of natural *** provides a different poten- tial manner from artificial *** illustrate the effectiveness of this new model,apical dominance phenomenon is introduced to construct a ncvel variant by emphasizing the influence of the *** this improvement,the population is divided into three different kinds of buds associated with their ***,a mutation strategy is applied to enhance the ability escaping from a local ***- ulation results demonstrate good performance of the new method when solving high-dimensional multi-modal problems.

关键词： Apical-dominance phenomenon Particle swarm optimization Branch growth model High-dimensional multi-modal benchmarks

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