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3D Nonparametric Neural Identification

JOURNAL OF CONTROL SCIENCE AND ENGINEERING 2012年第unknown期2012卷 618403.1-618403.10页

作者： Fuentes, Rita Q. Chairez, Isaac Poznyak, Alexander Poznyak, Tatyana CINVESTAV IPN Automat Control Dept Mexico City 07360 DF Mexico UPIBI IPN Bioproc Dept Mexico City 07360 DF Mexico ESIQIE IPN SEPI Mexico City 07738 DF Mexico

This paper presents the state identification study of 3D partial differential equations (PDEs) using the differential neural networks (DNNs) approximation. There are so many physical situations in applied mathematics and engineering that can be described by PDEs;these models possess the disadvantage of having many sources of uncertainties around their mathematical representation. Moreover, to find the exact solutions of those uncertain PDEs is not a trivial task especially if the PDE is described in two or more dimensions. Given the continuous nature and the temporal evolution of these systems, differential neural networks are an attractive option as nonparametric identifiers capable of estimating a 3D distributed model. The adaptive laws for weights ensure the "practical stability" of the DNN trajectories to the parabolic three-dimensional (3D) PDE states. To verify the qualitative behavior of the suggested methodology, here a nonparametric modeling problem for a distributed parameter plant is analyzed.

关键词： Three Dimensions Applied mathematics decentralised control Neural network Uncertainty distributed parameter Trivial

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Average Delay SLAs in Cloud Computing

Average Delay SLAs in Cloud Computing

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IEEE International Conference on Communications

作者： Boonyarith Saovapakhiran Michael Devetsikiotis George Michailidis Yannis Viniotis Department of Electrical and Computer Engineering North Carolina State University Department of Statistics University of Michigan

ISBN: (纸本)9781457720529

In this paper, we conduct feasibility studies on the average delay space for Cloud computing, and we propose a heuristic method to control the vector of average delays, subject to predefined delay constraints. Our work is strongly motivated by the fact that delay control plays a critical role to improve Service Level Agreements (SLA) between users and Cloud service providers, which is necessary for empowering online business. Specifically, our main contributions are two-fold: First, the feasible regions of various routing algorithms for the system's dispatcher are investigated in depth. Second, a simple heuristic algorithm is designed, to move the average delay point along the feasible direction until achieving the delay constraints. Average delay is dependent on multiple factors such as job size, inter-arrival time, flow rate, and the dispatching rules of the system. Therefore, we vary their distribution, parameters and routing rules to examine how the feasible regions move or change. After establishing the feasible delay space, then by moving along the feasible directions, we show that a simple heuristic algorithm can achieve the delay constraints for a two queue system.

关键词： mean delay Cloud Computing Heuristic algorithms time delay control Dispatching rules Routing algorithms distributed parameter

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Equivalent PI Circuit for Zero-sequence Double Circuit Transmission Lines

Equivalent PI Circuit for Zero-sequence Double Circuit Trans...

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IEEE Power and Energy Society General Meeting

作者： Ning Kang Yuan Liao ABB Corporate Research Center Raleigh NC 27606 USA Department of Electrical and Computer engineering University of Kentucky Lexington KY 40506 USA

ISBN: (纸本)9781467327275

To accurately represent a transmission line, the equivalent PI circuit is required. This representation is based on the distributed parameter line model and fully considers the fact that the parameters including impedance and admittance are uniformly distributed throughout the entire length of the line. For a single-circuit transmission line or a positive/negative sequence double-circuit line, its equivalent PI circuit based on the distributed parameter line model has been well established in the literature. This paper aims to provide the equivalent PI circuit parameters for the zero-sequence networks of a double-circuit line where there is a mutual coupling between the parallel lines. The derivation is based on the solution of the differential equations in the time-domain. Hyperbolic forms of the parameters of the equivalent PI circuit are resulted. A numerical example is utilized to demonstrate the application of the equivalent PI circuit parameters and compare with the nominal PI circuit parameters.

关键词： Equivalent PI circuit double-circuit transmission line distributed parameter line model lumped parameter line model nominal PI circuit zero-sequence networks Double circuit Polyimides productivity indexes Proportional integral zero sequence circuit parameter Equivalent equivalent circuits impedance Transmission Lines on-line model distributed parameter

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Stochastic Analysis of Air-Traffic System and Its Corresponding Application in parameters Prediction

Stochastic Analysis of Air-Traffic System and Its Correspond...

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American Control Conference

作者： Qianli Ma Yan Wan Dengfeng Sun School of Aeronautics and Astronautics Purdue University West Lafayette IN 47907 USA Department of Electrical Engineering University of North Texas Denton TX 76203 USA

ISBN: (纸本)9781457710957

In this paper we propose using one of the stochastic methods - Probabilistic Collocation Method (PCM) to find simplified polynomial mapping between two uncertain Air-Traffic System (ATS) parameter data sets. These two parameter sets can be two distinguished collection of measured parameters depicting various aspects of one specific air-traffic system, and the knowledge of parameters distribution is not a requirement. We show that PCM can be applied to air-traffic systems from immense systems like United States' National Air-space System (NAS), down-scale to middle-sized systems as New York City metro-area air-traffic system with combination of three major airports (JFK, EWR and LGA) or even smaller systems like Chicago O'Hare International Airport (ORD). Compared with commonly used direct polynomial fitting method, PCM has the advantages in both efficient calculation and high accuracy. Along with the mapping relation of PCM from historical parameter data sets, we applied such polynomial mapping relation to predict the future air-traffic within the same system. By comparing the predicted data with the real recorded or FACET simulated data, we have reached the conclusion that the PCM performs excellent in analyzing current data and predicting future value based on historical mapping formula. The capability of forecasting by applying PCM serves as one powerful tool in launching control on air-traffic system as well as managing the system in advance based on the known traffic data.

关键词： Pulse code modulation traffic systems stochastic analysis parameter prediction Traffic data GLS2 gene distributed parameter MAPPING(MATHEMATICAL) Polynomial managed system

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3D Social Saliency from Head-mounted Cameras 12

3D Social Saliency from Head-mounted Cameras

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Annual Conference on Neural Information Processing Systems

作者： Hyun Soo Park Eakta Jain Yaser Sheikh Carnegie Mellon University Texas Instruments

ISBN: (纸本)9781627480031

A gaze concurrence is a point in 3D where the gaze directions of two or more people intersect. It is a strong indicator of social saliency because the attention of the participating group is focused on that point. In scenes occupied by large groups of people, multiple concurrences may occur and transition over time. In this paper, we present a method to construct a 3D social saliency field and locate multiple gaze concurrences that occur in a social scene from videos taken by head-mounted cameras. We model the gaze as a cone-shaped distribution emanating from the center of the eyes, capturing the variation of eye-in-head motion. We calibrate the parameters of this distribution by exploiting the fixed relationship between the primary gaze ray and the head-mounted camera pose. The resulting gaze model enables us to build a social saliency field in 3D. We estimate the number and 3D locations of the gaze concurrences via provably convergent mode-seeking in the social saliency field. Our algorithm is applied to reconstruct multiple gaze concurrences in several real world scenes and evaluated quantitatively against motion-captured ground truth.

关键词： Ocular Fixation Cameras Three Dimensions Eye distributed parameter Videotapes

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STATISTICAL DETECTION OF INFORMATION HIDING BASED ON ADJACENT PIXELS DIFFERENCE

STATISTICAL DETECTION OF INFORMATION HIDING BASED ON ADJACEN...

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European Signal Processing Conference

作者： Remi Cogranne Cathel Zitzmann Florent Retraint Igor Nikiforov Philippe Cornu Lionel Fillatre ICD - LM2S - Universite de Technologie de Troyes - UMR STMR CNRS

ISBN: (纸本)9781467310680

This paper presents a novel methodology for statistical detection of Least Significant Bits (LSB) matching steganography. It proposes to exploit a statistical model of natural images adjacent pixels difference. In this paper, the detection problem is first addressed in a theoretical context when cover image parameters are known. The most powerful likelihood ratio test (LRT) is designed and its statistical performances are analytically expressed. Then, for a practical case of unknown image analysis, an estimation of distribution parameters is proposed to designed a test whose performance are also analytically established. Numerical results on a large image database shows the relevance of proposed methodology.

关键词： Hypothesis testing Data hiding Information forensics Detection theory Image processing visual databases pixel distributed parameter statistical models (nuclear) image analysis

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SLIDING MODE CONTROL OF A CLASS OF ITO TYPE distributed parameter SYSTEMS WITH DELAY

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Acta Mathematica Scientia 2007年第1期27卷 67-76页

作者：罗琦邓飞其包俊东赵碧荣 Department of Information and Control Nanjing University of Information Science and Technology College of Automation Science and Engineering South China University of Technology College of Mathematic Science Inner Mongolia Normal University Department of Mathematics Guangzhou University

Sliding mode control problem of a class of Ito^ type partial differential equations with delay is probed. The variable structure controller is designed. The existence of motion of sliding mode is shown. And the character of invariance of sliding control system about uncertainty on the sliding switching surface and stability are analyzed.

关键词： Uncertainty randomness distributed parameter variable structure control

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Accurate closed-form approximations to generalised-K sum distributions and applications in the performance analysis of equal-gain combining receivers

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IET COMMUNICATIONS 2011年第7期5卷 982-989页

作者： Peppas, K. P. Natl Ctr Sci Res Demokritos Inst Informat & Telecommun Lab Mobile Commun Athens 15310 Greece

In this study, highly accurate closed-form approximations to the probability density function of the sum of independent identically distributed (i.i.d.) generalised-K fading envelopes are derived. These approximations are valid for a wide range of values of the distribution parameters and number of summands. Based on the previously derived formulas, simple precise approximations for the outage probability and the average bit error probability of equal-gain combining receivers operating on i.i.d. generalised-K fading channels are proposed. Extensive numerically evaluating and computer simulation results are presented to demonstrate the proposed analysis.

关键词： ABER sums Receivers Task Performance and Analysis Probability density function distributed parameter system performance analysis Suppliers files

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SAR image classification based on alpha-stable distribution

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REMOTE SENSING LETTERS 2011年第1期2卷 51-59页

作者： Peng, Yijin Xu, Xin Zhou, Wanbin Zhao, Yin Wuhan Univ Signal Proc Lab Sch Elect Informat Wuhan 430079 Hubei Peoples R China

We propose a classification algorithm that utilizes the alpha-stable distribution to model the texture features of synthetic aperture radar (SAR) images. The SAR image is first decomposed by stationary wavelet transform (SWT). After that, the alpha-stable distribution is applied to model the high-frequency subband coefficients of the image at each decomposition scale. A regression-type method is then used to estimate the alpha-stable distribution parameters, which form a feature vector that fully describes the texture. Finally, a SAR image classification algorithm is derived by exploiting this feature vector based on the support vector machines (SVM) approach. Because different combinations of alpha-stable distribution parameters contribute to differences in classification precision, a multi-level SVM (MSVM) classification algorithm is also presented to address the issue. Experimental results indicate that the proposed SAR image classification algorithm is effective and the MSVM algorithm improves the classification performance. Moreover, our proposed algorithm has low computational cost as only a small number of the alpha-stable distribution parameters are processed.

关键词： Sorting algorithm Synthetic aperture radar Support Vector Network Eigenvector Image classification images algorithms Imagery (Psychotherapy) Rescue SAFETY ANALYSIS REPORTS distributed parameter Specific absorption rate

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Real time prelocalization of underground single-phase cable insulation failure by using the sheath behavior at fault point

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ELECTRIC POWER SYSTEMS RESEARCH 2011年第10期81卷 1936-1942页

作者： Aloui, Thameur Ben Amar, Fathi Derbal, Nizar Abdallah, Hsan Hadj Tunisian Co Elect & Gas Sfax 3012 Tunisia Sfax Preparatory Inst Engn Studies Sfax 3018 Tunisia Natl Engn Sch Sfax Sfax 3038 Tunisia

This article presents a prelocalization approach of insulation faults affecting single-phase cables by using electrical measurements of voltage and current available in one substation. This approach is based on the theory of distributed parameters for modeling the faults to the ground. The specificity of this approach is the introduction of a resistance modeling the sheath-ground insulation allowing us to study the various types of faults to the ground (frankly and resistive). The fault distance and resistances are determined by two methods numerical and analytical. Many fault scenarios applied to the 150 kV underground cable connecting HTB sub-stations of Tyna-Taparoura-Sidimansour in Sfax, show a good agreement between the two methods. A simulation of the global system using the software Simulink-SimPowerSystems of Matlab is carried out giving us the voltages and currents on the source side necessary to the execution of the developed methods and the validation of the obtained results. (C) 2011 Elsevier B.V. All rights reserved.

关键词： Underground cable Prelocalization Fault distance distributed parameter Numerical method Analytical method

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