نتایج جستجو برای: improvement of block

تعداد نتایج: 21191117  

2002
David K. Asano

In this correspondence, block and convolutional coding for Gaussian minimum shift keying (GMSK) in additive white Gaussian noise (AWGN) channels is investigated. The performance improvement that can be obtained without an increase in bandwidth is found for block and convolutional codes with various block lengths and constraint lengths, respectively, when a simple suboptimal demodulation scheme ...

Journal: :Journal of the American College of Cardiology 2004
David Zeltser Dan Justo Amir Halkin Raphael Rosso Maya Ish-Shalom Mordechai Hochenberg Sami Viskin

OBJECTIVES The goal of this study was to determine how often atrioventricular (AV) block is really caused by medications. BACKGROUND Beta-blockers, verapamil, and diltiazem are considered a cause of AV block for which pacemaker implantation is not indicated. However, it is not known if such patients can expect a benign course after discontinuation of the culprit medication. METHODS Consecut...

2005
Christoph Tillmann Tong Zhang

In this paper, we present a novel training method for a localized phrase-based prediction model for statistical machine translation (SMT). The model predicts blocks with orientation to handle local phrase re-ordering. We use a maximum likelihood criterion to train a log-linear block bigram model which uses realvalued features (e.g. a language model score) as well as binary features based on the...

2004
Hyun Wook Park

We have developed a moving-object segmentation method for standard-compliant DCT-based video coder. To be compliant with current block-based video coding standards, the proposed algorithm uses the DCT coefficients and motion vector of a block, respectively, as spatial and temporal features of segmentation. Since block-based motion vector may not be sufficient to represent true motion of object,...

2004
Dong Wook Kim Eung-Kwan Kang Jin Tae Kim Yong-In Yoon Jong-Soo Choi

The error concealment is a very useful technique for real-time communication systems, such as video conferencing. In this paper, we propose an error concealment technique designated to minimize discontinuities between block boundaries in consideration of the fact that the human visual system is sensitive to discontinuities. Error concealment for each loss block is performed by surrounding regio...

Journal: :British medical journal 1971
T J Bayley

Six patients with symptoms due to sinoatrial block are described in whom no relief or improvement in block occurred when they were treated with isoprenaline or ephedrine. All six patients were treated by ventricular cardiac pacing with complete relief of symptoms. Despite the theoretical disadvantages of parasystole and loss of accrochage in treating these patients by ventricular pacing they ha...

ژورنال: Journal of Railway Research 2016
Hghshenas, H., Shafiepour, M., Tahmasebi, B., Tamannaei, M.,

The aim of this study is to present two comprehensive strategies for prioritizing the capacity improvement solutions in the railway networks. The solutions considered in this study include: promoting to double-track railways, block signaling system, electrification and re-opening the closed stations. The first strategy is based on a local approach, which concentrates on the critical block secti...

Journal: :IEICE Transactions 2013
Tsukasa Takahashi Teruyuki Miyajima

In OFDM systems, residual inter-block interference can be suppressed by a time-domain equalizer that blindly shortens the effective length of a channel impulse response. To further improve the performance of blind equalizers, we propose a channel shortening method that attempts to maximize the minimum FFT output power over data subcarriers. Simulation results indicate that the max-min strategy ...

Journal: :SIAM Journal on Matrix Analysis and Applications 2023

We introduce an iterative method named Gpmr (general partitioned minimum residual) for solving block unsymmetric linear systems. is based on a new process that simultaneously reduces two rectangular matrices to upper Hessenberg form and closely related the block-Arnoldi process. tantamount Block-Gmres with right-hand sides in which approximate solutions are summed at each iteration, but its sto...

2012
Bachir Boucheham Youcef Ferdi

We suggest a novel method to incorporate longterm redundancy (LTR) in signal time domain compression methods. The proposition is based on block-sorting and curve simplification. The proposition is illustrated on the ECG signal as a post-processor for the FAN method. Test applications on the new so-obtained FAN+ method using the MIT-BIH database show substantial improvement of the compression ra...

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