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Block truncation signature coding for hyeprspectral analysis

Block truncation signature coding for hyeprspectral analysis

引用

Imaging Spectrometry XIII

作者： Chakravarty, Sumit Chang, Chein-I. Remote Sensing Signal and Image Processing Laboratory Department of Computer Science and Electrical Engineering University of Maryland Baltimore County Baltimore MD 21250 United States

ISBN: (纸本)9780819473066

This paper introduces a new signature coding which is designed based on the well-known Block Truncation Coding (BTC). It comprises of bit-maps of the signature blocks generated by different threshold criteria. Two new BTC-based algorithms are developed for signature coding, to be called Block Truncation Signature Coding (BTSC) and 2-level BTSC (2BTSC). In order to compare the developed BTC based algorithms with current binary signature coding schemes such as Spectral Program Analysis Manager (SPAM) developed by Mazer et al. and Spectral Feature-based Binary Coding (SFBC) by Qian et al, three different thresholding functions, local block mean, local block gradient, local block correlation are derived to improve the BTSC performance where the combined bit-maps generated by these thresholds can provide better spectral signature characterization. Experimental results reveal that the new BTC-based signature coding performs more effectively in characterizing spectral variations than currently available binary signature coding methods.

关键词： Managers

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Multifractal analysis and feature extraction of DNA sequences

Multifractal analysis and feature extraction of DNA sequence...

引用

IEEE International Conference on Cognitive Informatics

作者： Witold Kinsner Hong Zhang Laboratory Mathematical Sciences Research Institute USA Signal and Data Compression Laboratory Department of Electrical and Computer Engineering University of Manitoba Winnipeg MAN Canada

This paper presents feature extraction and estimations of multifractal measures for deoxyribonucleic acid (DNA) sequences, and demonstrates the intriguing possibility of identifying biological functionality using information contained within the DNA sequence. We have developed a technique that seeks patterns or correlations in the DNA sequence at a higher level. The technique has three main steps: (i) transforms the DNA sequence symbols into a modified Levy walk, (ii) transforms the Levy walk into a signal spectrum, and (iii) breaks the spectrum into subspectra and treats each of these as an attractor from which the multifractal dimension spectrum is estimated. An optimal minimum window size and volume element size are found for estimation of the multifractal measures. Experimental results show that DNA is a multifractal, and that the multifractality changes depending upon the location (coding or noncoding region) in the sequence.

关键词： Fractals Feature extraction DNA Sequences

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Delay in Cooperative Communications: Achieving Higher Multiplexing Gain in Gaussian Interference Channels with Full-Duplex Transmitters

Delay in Cooperative Communications: Achieving Higher Multip...

引用

作者： Haghi, Ali Mohammadizadeh, Neda Khandani, Amir K. Department of Electrical and Computer Engineering Coding and Signal Transmission Laboratory University of Waterloo WaterlooN2L 3G1 Canada

Delay, guaranteeing causality, is inevitable in cooperative communication systems. Traditionally, delay granularity has been limited to one symbol;however, channel delay is in fact governed by channel memory and can be shorter. For example, the delay requirement in orthogonal frequency-division multiplexing, captured in the cyclic prefix, is typically much shorter than the symbol itself. This perspective is used to study the two-user Gaussian interference channel with full-duplex transmitters. By superimposing the signal from the other node onto its own signal, each transmitter cancels the interference at its receiver. Among other results, it is proved that under a mild condition, the maximum multiplexing gain of this channel is in fact two, rather than the limit of one, previously shown under the traditional constraint of causal delay. Further, the optimal power allocation among orthogonal sub-carriers, which maximizes the achievable sum-rate, is shown to be a generalization of the well-known water filling. Simulation results are included to demonstrate the improvement in the achievable sum-rate when full-duplex transmitters are used. © 1963-2012 IEEE.

关键词： Orthogonal frequency division multiplexing

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Novel registration technique for InISAR & InSAR

Novel registration technique for InISAR & InSAR

引用

2003 IEEE IGARSS: Learning From Earth's Shapes and Colours

作者： Zhang, Q. Yeo, T.S. Radar and Signal Processing Laboratory Department of Electrical and Computer Engineering National University of Singapore 10 Kent Ridge Crescent 119260 Singapore

In InISAR system, the pixels between two ISAR images derived from corresponding antennas usually do not register properly without prior compensation. A three-dimension motion compensation method, or 3D focusing, is put forward in this paper. With the multi-Antenna-pair configuration in radar system, the angular motion p arameters b oth in the a zimuth and p itching a re estimated accurately and the phase unwrapping processing can be avoided in the procedure of obtaining phase unambiguous. Simulation data is used to illustrate the accuracy of the proposed method. The method has also been extended to stripmap SAR for the interferometric 3D imaging of moving and/or man-made objects. © 2003 IEEE.

关键词： Motion compensation

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Tensor representation in high-frequency financial data for price change prediction

Tensor representation in high-frequency financial data for p...

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2017 IEEE Symposium Series on Computational Intelligence, SSCI 2017

作者： Tran, Dat Thanh Magris, Martin Kanniainen, Juho Gabbouj, Moncef Iosifidis, Alexandros Laboratory of Signal Processing Tampere University of Technology Tampere Finland Laboratory of Industrial and Information Management Tampere University of Technology Tampere Finland Department of Engineering Electrical and Computer Engineering Aarhus University Aarhus Denmark

ISBN: (纸本)9781538627259

Nowadays, with the availability of massive amount of trade data collected, the dynamics of the financial markets pose both a challenge and an opportunity for high frequency traders. In order to take advantage of the rapid, subtle movement of assets in High Frequency Trading (HFT), an automatic algorithm to analyze and detect patterns of price change based on transaction records must be available. The multichannel, time-series representation of financial data naturally suggests tensor-based learning algorithms. In this work, we investigate the effectiveness of two multilinear methods for the mid-price prediction problem against other existing methods. The experiments in a large scale dataset which contains more than 4 millions limit orders show that by utilizing tensor representation, multilinear models outperform vector-based approaches and other competing ones. © 2017 IEEE.

关键词： Tensors

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A quantitative comparison of different mother wavelets for characterizing transients in power systems

A quantitative comparison of different mother wavelets for c...

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Canadian Conference on electrical and computer engineering 2005

作者： Safavian, L.S. Kinsner, W. Turanli, H. Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg Man. R3T 5V6 Canada Manitoba Hydro Winnipeg Man. R3C 2P4 Canada

This paper presents a study of wavelet analysis of transients in power systems. Short-term and nonstationary nature of transients necessitates the use of advanced signal processing techniques in order to detect, characterize and classify them. The paper examines the fundamental properties of a number of mother wavelets, and provides guidelines for the selection of suitable wavelets for the purpose of characterization and extraction of features of transients in power systems. As an indispensable part of such a study, the paper also presents the results of wavelet analysis of typical types of transients obtained using simulation. © 2005 IEEE.

关键词： Wavelet transforms

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Aquantitative comparison of different mother wavelets for characterizing transients in power systems

Aquantitative comparison of different mother wavelets for ch...

引用

Canadian Conference on electrical and computer engineering (CCECE)

作者： L.S. Safavian W. Kinsner H. Turanli Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada Manitoba Hydro Winnipeg MAN Canada

This paper presents a study of wavelet analysis of transients in power systems. Short-term and non-stationary nature of transients necessitates the use of advanced signal processing techniques in order to detect, characterize and classify them. The paper examines the fundamental properties of a number of mother wavelets, and provides guidelines for the selection of suitable wavelets for the purpose of characterization and extraction of features of transients in power systems. As an indispensable part of such a study, the paper also presents the results of wavelet analysis of typical types of transients obtained using simulation

关键词： Power system transients Transient analysis Wavelet analysis signal analysis Power system simulation Power system analysis computing Wavelet transforms signal processing Guidelines Feature extraction

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Multifractal spectra of lightning strike maps using entropy and wavelet analyses

Multifractal spectra of lightning strike maps using entropy ...

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Canadian Conference on electrical and computer engineering (CCECE)

作者： A. Faghfouri W. Kinsner D. Swatek Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada Manitoba Hydro Winnipeg MAN Canada

This paper describes a multifractal analysis of physical lightning strike maps obtained for Manitoba through the Canadian Lightning Detection Network. Cloud-to-ground discharges or lightning strikes are physical phenomena which may have adverse effects on power transmission and delivery. Predicting the geographical and temporal distribution of lightning strike maps through modelling can help power system designers to improve the protection of existing and new power systems and transmission lines. In order to compare the model to physical data, their characterization is required. Since lightning strike maps are highly nonlinear, nonstationary and stochastic, ordinary analyses and measures are insufficient to characterize these phenomena. Since self affinity of the lightning strike maps is the indication of multifractality, complexity measures such as the Renyi fractal dimension spectrum (RS) and Mandelbrot singularity spectrum (MS) are appropriate for such fractal analysis. In this paper, we investigate the multifractality of lightning strike maps in Manitoba through the RS and MS. Both methods generate similar results and show that the maps are multifractal. Comparing the range of results with a similar phenomenon, diffusion limited aggregates (DLA), supports the accuracy of calculations as well.

关键词： Fractals Lightning Entropy Wavelet analysis Power system modeling Power system protection Power system analysis computing Power system measurements Transmission line measurements Power transmission

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A Probabilistic Approach to Classification of Transients in Power Systems

A Probabilistic Approach to Classification of Transients in ...

引用

Canadian Conference on electrical and computer engineering (CCECE)

作者： L. S. Safavian W. Kinsner H. Turanli Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada Manitoba Hydro Winnipeg MAN Canada

This paper presents an in-depth study of classification of transients in power systems using two pattern classification methods, namely the maximum-likelihood, and the probabilistic neural networks. These methods, which stem from the Bayes rule, aim at estimating the underlying probability density functions that are required by the Bayes rule, but are often unavailable readily. The paper presents the mathematical foundations of classification using these two methods, followed by their implementation for classification of three types of transients, namely three-phase faults, breaker operations and capacitor switchings. Features used in this study are obtained using the wavelet and multifractal analyses of transient waveforms

关键词： Power system transients Transient analysis Wavelet analysis Fractals Power system faults Pattern classification Maximum likelihood estimation PSCAD signal processing Neural networks

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Enhanced fractal image coding by combining IFS and VQ

Enhanced fractal image coding by combining IFS and VQ

引用

IEEE International Conference on Image Processing

作者： J.-L. Dugelay A. Gersho Department of Multimedia Communications Institut EURECOM France Signal Compression Laboratory Department of Electrical & Computer Engineering University of California Santa Barbara CA USA

A novel paradigm for fractal coding selectively corrects the fractal code for selected domain blocks with an image-adaptive VQ codebook. The codebook is generated from the initial uncorrected fractal code and is there... 详细信息

关键词： Fractals Image coding Image reconstruction Iterative decoding Distortion measurement computer errors Bit rate Error correction Upper bound Encoding

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