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作者： Beniaminson, Daniel Halivni, Bar Evzelman, Michael Kuperman, Alon Peretz, Mor Mordechai Ben-Gurion University of the Negev The Center for Power Electronics and Mixed-Signal Ic Department of Electrical and Computer Engineering P.O. Box 653 Beer-Sheva8410501 Israel Ben-Gurion University of the Negev Applied Energy Laboratory Department of Electrical and Computer Engineering P.O. Box 653 Beer-Sheva84105 Israel

ISBN: (纸本)9798350316186

This paper introduces a digitally controlled multiphase multistage hybrid boost converter (MMHBC) for high voltage capacitor charging applications. Rapid capacitor charging control approach is presented, and topological variations to improve efficiency are examined. The controller provides tight output current regulation, while maintaining real-time current balancing capabilities for superior thermal distribution and converter efficiency. The MMHBC is capable of rapid capacitor bank charging to high voltage by forcing maximum output current at the first stage, which translates into maximal output power during the whole charging period. The controller includes a system governor unit which facilitates additional control aspects for multiphase operation such as phase shedding, soft-start mechanism, and system protection. SMPS operation, rapid capacitor charging, and topological improvements are validated experimentally on a four-phase 12V-to-300V multiphase prototype with a maximum output power of 250W and power density of 2.5kW/Liter. © 2023 IEEE.

关键词： Controllers

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Limit cycles in floating-point implementations of recursive filters - A review

Limit cycles in floating-point implementations of recursive ...

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1992 IEEE International Symposium on Circuits and Systems, ISCAS 1992

作者： Laakso, Timo I. Zeng, Bing Helsinki University of Technology Laboratory of Signal Processing and Computer Technology EspooSF-02150 Finland University of Toronto Department of Electrical Engineering TorontoONM5S 1A4 Canada

ISBN: (纸本)0780305930

In this paper, results on limit cycle oscillations in floating-point implementations of recursive filters are reviewed. Special attention is paid to structures with a single floating-point nonlinearity in the recursive filter loop, for which efficient criteria have heenproposedto guarantee the absence of limit cycles. Both unlimited exponent range limit cycles and underflow limit cycles are considered. Also results on wave digital fillers and related structures are discussed. © 2012 IEEE.

关键词： Digital arithmetic

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Filtering Balun Design using Hairpin-Ring Resonator and SSPP Metamaterial with Wide Notched band and Wide Stopband

Filtering Balun Design using Hairpin-Ring Resonator and SSPP...

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2023 IEEE MTT-S International Wireless Symposium, IWS 2023

作者： Qi, Huanhuan Liu, Haiwen Huang, Mo School of Information and Communications Engineering Xi' An Jiaotong University Xi'an China Faculty of Science and Technology State Key Laboratory of Analog and Mixed-Signal Vlsi China Institute of Microelectronics University of Macau Department of Electrical and Computer Engineering China

ISBN: (纸本)9798350336535

In this paper, a novel filtering balun based on microstrip-to-slotline transition is proposed. Utilizing the inherent out-of-phase electric field distributions on the adjacent grounds of slotline, the balun function is realized. In order to realize the wide notched-band and stopband performance for radio astronomical applications, spoof surface plasmon polariton (SSPP) metamaterial and multi-mode hairpin ring resonators (HRRs) are adopted. With these novel structures loaded, the proposed filtering balun exhibits a wide band from 1GHz to 6 GHz. The notched band is from 3.2 GHz to 4.4 GHz, within the notched band, the rejection level is better than 15 dB. Besides, the out-of-band suppression is below 35 dB in the wide frequency range from 6 GHz to 8 GHz. © 2023 IEEE.

关键词： Metamaterials

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Generating Statistically Correlated Glint And RCS For Empirically Based RF Target Models

Generating Statistically Correlated Glint And RCS For Empiri...

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IEEE Southeastcon

作者： A.K. Jain Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California USA

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Temporal prediction of video sequences using an image warping technique based on color segmentation 9th

Temporal prediction of video sequences using an image warpin...

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9th International Conference on Image Analysis and Processing, ICIAP 1997

作者： Herodotou, N. Venetsanopoulos, A.N. Digital Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of Toronto 10 King's College Road TorontoONM5S 3G4 Canada

ISBN: (纸本)3540635076

An image warping technique based on segmented regions is introduced for the temporal prediction of videophone-type sequences. At the encoder, a set of control points are determined from the previous frame and their corresponding best matched points are determined from the current frame. The selection process of these points is achieved by segmenting the previous frame into different regions using a color segmentation technique based on a recursive histogramming approach and the control points are subsequently chosen along the region boundaries. The spatial offset of these points between the previous and current frame are represented as motion vectors. The facial area is intraframe encoded to avoid distortions of the facial features which convey critical information. At the decoder, the same segmentation and control point selection algorithm is used along with the motion vectors in order to find the region boundaries of the predicted frame. The facial area is decoded and an affine transformation is finally used to determine the remaining regions and form the predicted frame. This technique produces results that are free from blocking artifacts as in the conventional block matching method, with only a moderate increase in computational complexity. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Decoding

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A new time series classification approach

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signal PROCESSING 1996年第2期54卷 191-199页

作者： Plataniotis, KN Androutsos, D Venetsanopoulos, AN Lainiotis, DG Department of Electrical and Computer Engineering Digital Signal & Image Processing Laboratory University of Toronto 10 King's College Rd. Toronto Ontario M5S 3G4 Canada Intelligent Systems Technology 3207 S. Hwy. A1A Melbourne Beach FL-32951 USA

A new, robust and computationally attractive approach to the problem of time series classification is discussed in this paper. Both the Bayesian as well as a new adaptive classification scheme for source selection are... 详细信息

关键词： time series classification neural networks logistic function

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Design of fast algorithms for pixel purity index for endmember extraction in hyperspectral imagery

Design of fast algorithms for pixel purity index for endmemb...

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Annual Conference 2005 - Geospatial Goes Global: From Your Neighborhood to the Whole Planet

作者： Chaudhry, Farzeen Chakravarty, Sumit Plaza, Antonio Chang, Chein-I. Department of Computer Science and Electrical Engineering Remote Sensing Signal and Image Processing Laboratory University of Maryland Baltimore MD 21250 United States Computer Science Department University of Extremadura Avda. de la Universidad s/n 10.071 Caceres Spain

ISBN: (纸本)1570830762

This paper presents new fast algorithms to improve the widely used endmember extraction algorithm, called pixel purity index (PPI) and also modify a revised version of PPI, called block of skewers (BOS) method. Since both the PPI and the BOS method suffer from same drawbacks in implementation, our proposed algorithms are designed to mitigate these dilemmas by introducing a newly developed concept, called virtual dimensionality (VD) and a process that can automatically determine a set of endmembers without appealing for parameters used in the PPI and BOS method. As a result, two modified PPI and BOSPPI algorithms are developed. Unlike the PPI and BOS method, the two new algorithms are iterative and provide stopping rules to automatically extract endmembers without manually selecting endmembers. The experimental study shows that the MPPI performs better than the PPI not only in computational complexity, but also in stability and performance, and the MBOSPPI could perform better than the BOS method if the blocks of skewers are properly designed. © 2005 by the American Society for Photogrammetry and Remote Sensing.

关键词： Iterative methods

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Investigation performance on electrocardiogram signal processing based on an advanced algorithm combining wavelet packet transform (WPT) and Hilbert-Huang Transform (HHT)

Investigation performance on electrocardiogram signal proces...

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5th International Symposium on IT in Medicine and Education, ITME 2013

作者： Bo, Jin Cao, Xuewen Wan, Yuqing Yu, Yuanyu Hang, Pun Sio Mak, Peng Un Vai, Mang I Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Taipa China Department of Computer and Information Science Faculty of Science and Technology University of Macau Taipa China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Taipa China

ISBN: (纸本)9789400776173

The Electrocardiogram (ECG) is essential for the clinical diagnosis of cardiovascular disease. An advanced algorithm combining wavelet packet transformation (WPT) and Hilbert Huang transform (HHT) is presented for processing ECG (Electrocardiography) signal in this paper. First the WPT can resolve the ECG signal into a group of signals with narrow band. Then, the Empirical Mode Decomposition (EMD) process of Hilbert-Huang Transform (HHT) is applied on the narrow band signals. The unrelated IMFs of ECG signal are removed from result through a screening process. Finally, the Hilbert transform is employed to achieve the Hilbert spectrum and marginal spectrum. The results show the effective performance of the algorithm combining WPT and HHT in reducing ECG noise and time-frequency analysis. By comparing with the original HHT, the proposed algorithm has the better performance on ECG signal processing. © Springer Science+Business Media Dordrecht 2014.

关键词： Electrocardiograms

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