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Spatial multiplexing for photon-counting MIMO-FSO communication systems
منشور في 2018"…In this paper, we consider the problem of multiple-input multiple-output (MIMO) free-space optical communications under the Poisson photon-counting detection model. Aiming for high bit rate objectives, we consider the spatial-multiplexing (SMux) solution with M-ary pulse-position modulation, where we propose appropriate optimal and suboptimal decoders and evaluate their complexities. …"
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2
Optical spatial modulation for FSO IM/DD communications with photon counting receivers
منشور في 2019"…A performance analysis is carried out over gamma-gamma channels with the exact Poisson photon-counting detection model. Exact Symbol Error Probability (SEP) expressions, simple upper bounds and the achievable transmit diversity orders are derived for both the open-loop and closed-loop scenarios. …"
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3
Precoding‐Aided Spatial Modulation for the Wiretap Channel with Relay Selection and Cooperative Jamming
منشور في 2018"…<p dir="ltr">We propose in this paper a physical‐layer security (PLS) scheme for dual‐hop cooperative networks in an effort to enhance the communications secrecy. The underlying model comprises a transmitting node (Alice), a legitimate node (Bob), and an eavesdropper (Eve). …"
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4
Precoding-Aided Spatial Modulation for the Wiretap Channel with Relay Selection and Cooperative Jamming
منشور في 2018"…<p dir="ltr">We propose in this paper a physical-layer security (PLS) scheme for dual-hop cooperative networks in an effort to enhance the communications secrecy. The underlying model comprises a transmitting node (Alice), a legitimate node (Bob), and an eavesdropper (Eve). …"
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5
H.264/AVC Motion Vector Concealment Solutions Using Online and Offline Polynomial Regression
منشور في 2015"…Both solutions make use of the spatially and temporally neighboring motion vectors for building the regression models. …"
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6
MLMRS-Net: Electroencephalography (EEG) motion artifacts removal using a multi-layer multi-resolution spatially pooled 1D signal reconstruction network
منشور في 2022"…The performance of the deep learning models is measured using three well-known performance matrices viz. mean absolute error (MAE)-based construction error, the difference in the signal-to-noise ratio (ΔSNR), and percentage reduction in motion artifacts (<i>η</i>). …"
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7
Daytime Variation of Urban Heat Islands: The Case Study of Doha, Qatar
منشور في 2016"…We validated the predictions of the statistical models by computing the Root Mean Square Error (RMSE) and discovered that temporal variations in urban heat are mediated by different factors throughout the day. …"
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8
Partially Lagging One-Equation Turbulence Model
منشور في 2015"…The amount of relaxation is based on the von Kármán length scale. The present model does not assume equal diffusion coefficients of the [Math Processing Error] and [Math Processing Error] equations; therefore, third-order velocity gradients emerge. …"
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9
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10
Optimizing the Energy Production for a Photovoltaic Thermal (PVT) Water System
منشور في 2022احصل على النص الكامل
doctoralThesis -
11
Deep Models for Stroke Segmentation: Do Complex Architectures Always Perform Better?
منشور في 2024"…While conventional manual techniques are time-consuming and prone to errors, advanced deep learning models have shown promising results in medical image segmentation. …"
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12
Effect of Pilot-Points Location on Model Calibration: Application to the Northern Karst Aquifer of Qatar
منشور في 2019"…<div><p>In hydrogeological modelling, two approaches are commonly used for model calibration: zonation and the pilot-points method. …"
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13
Performance comparison of variable-stepsize IMEX SBDF methods on advection-diffusion-reaction models
منشور في 2025"…<p>Advection-diffusion-reaction (ADR) models describe transport mechanisms in fluid or solid media. …"
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14
Performance comparison of variable-stepsize IMEX SBDF methods on advection-diffusion-reaction models
منشور في 2025"…<p dir="ltr">Advection-diffusion-reaction (ADR) models describe transport mechanisms in fluid or solid media. …"
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15
MCDFN: supply chain demand forecasting via an explainable multi-channel data fusion network model
منشور في 2025"…Comparative benchmarking against seven other deep-learning models validates MCDFN’s efficacy, showing it outperforms its counterparts across key metrics with a mean squared error (MSE) of 23.5738, root mean squared error (RMSE) of 4.8553, mean absolute error (MAE) of 3.9991, and mean absolute percentage error (MAPE) of 20.1575%. …"
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16
Development of Machine Learning Models for Studying the Premixed Turbulent Combustion of Gas-To-Liquids (GTL) Fuel Blends
منشور في 2024"…For model 2, the maximum absolute error percentage was 6.58%. …"
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18
Large-eddy simulation of the flow in Z-Shape duct
منشور في 2020"…Some slight over-predictions and under-predictions were found at certain separation distances. These numerical errors are due to the limited modeling approach to predict small eddies structures with the current SGS model. …"
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19
Arabic Dialect Speech-Text Recognition Using Deep Learning
منشور في 2024"…To address these limitations, a hybrid approach is proposed, combining the TestRCNN and CNN architectures. This hybrid model leverages the CNN’s ability to extract detailed spatial features and the TestRCNN’s proficiency in capturing long-term dependencies. …"
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20
Receiver design for MIMO FSO communication systems with photon-counting detection. (c2019)
منشور في 2019"…Unlike the existing literature that considers the simplistic additive white Gaussian noise (AWGN) model, this work revolves around the more accurate Poisson noise model where the number of detected photons at the receiver follows the Poisson distribution for shot-noise limited receivers. …"
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masterThesis