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Clinical features of hepatopulmonary syndrome in cirrhotic patients

World Journal of Gastroenterology 2006年第12期12卷 1954-1956页

作者： Amir Houshang MohammadAlizadeh Seyed Reza Fatemi Vahid Mirzaee Manoochehr Khoshbaten Bahman Talebipour Afsaneh Sharifian Ziba Khoram Mohammad Reza Zali Farhad haj-sheikh-oleslami MasoomehGholamreza-shirazi Research Center for Gastroenterology and Liver Disease Shaheed Beheshti University of Medical SciencesTehranIran Cardiologist Shaheed Beheshti University of Medical SciencesTehranIran

AIM： To evaluate the frequency, clinical and paraclinical features of hepatopulmonary syndrome （HPS） and to determine their predictive values in diagnosis of this syndrome in patients in Iran. METHODS： Fifty four cirrhotic patients underwent contrast enhanced echocardiography to detect intrapulmonary and intracardiac shunts by two cardiologists. Arterial blood oxygen, 02 gradient （A-a） and orthodoxy were measured by arterial blood gas （ABG） test. The patients positive for diagnostic criteria of HPS were defined as clinical HPS cases and those manifesting the intrapulmonary arterial dilation but no other criteria （arterial blood hypoxemia） were defined as IHPS cases. HPS frequency, sensitivity, positive and negative predictive values of clinical and paraclinical features were studied. RESULTS： Ten （18.5%） and seven （13%） cases had clinical and subclinical HPS, respectively. The most common etiology was hepatitis B. Dyspnea （100%） and cyanosis （90%） were the most prevalent clinical features. Dyspnea and clubbing were the/host sensitive and specific clinical features respectively. No significant relationship was found between HPS and splenomegaly, ascites, edema, jaundice, oliguria, and collateral veins. HPS was more prevalent in hepatitis B. PaO2〈 70 and arterial-alveolar gradient had the highest sensitivity in HPS patients. Orthodoxy specificity was 100%. CONCLUSION： Clubbing with positive predictive value （PPV） of 75% and dyspnea with negative predictive value （NPV） of 75% are the best clinical factors in diagnosis of HPS syndrome. PaO2〈70 and P （A-a） 02〉 30 and their sum, are the most valuable negative and positive predictive values in HPS patients.

关键词： Hepatopulmonary syndrome Cirrhosis Contrast enhanced echocardiography

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Metaheuristic Based Data Gathering Scheme for Clustered UAVs in 6G Communication Network

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Computers, Materials & Continua 2022年第6期71卷 5311-5325页

作者： Ahmed S.Almasoud Siwar Ben haj Hassine Nadhem NEMRI Fahd N.Al-Wesabi Manar Ahmed Hamza Anwer Mustafa Hilal Abdelwahed Motwakel Mesfer Al Duhayyim Department of Information Systems College of Computer and Information SciencesPrince Sultan UniversitySaudi Arabia Department of Computer Science College of Science&Arts at MahayilKing Khalid UniversitySaudi Arabia Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia Department of Natural and Applied Sciences College of Community-AflajPrince Sattam bin Abdulaziz UniversitySaudi Arabia

The sixth-generation(6G)wireless communication networks are anticipated in integrating aerial,terrestrial,and maritime communication into a robust system to accomplish trustworthy,quick,and low latency *** enables to achieve maximum throughput and delay for several ***,the evolution of 6G leads to the design of unmanned aerial vehicles(UAVs)in providing inexpensive and effective solutions in various application areas such as healthcare,environment monitoring,and so *** the UAV network,effective data collection with restricted energy capacity poses a major issue to achieving high quality network *** can be addressed by the use of clustering techniques forUAVs in 6G *** this aspect,this study develops a novel metaheuristic based energy efficient data gathering scheme for clustered unmanned aerial vehicles(MEEDG-CUAV).The proposed MEEDG-CUAV technique intends in partitioning the UAV networks into various clusters and assign a cluster head(CH)to reduce the overall energy ***,the quantum chaotic butterfly optimization algorithm(QCBOA)with a fitness function is derived to choose CHs and construct *** experimental validation of the MEEDG-CUAV technique occurs utilizing benchmark dataset and the experimental results highlighted the better performance over the other state of art techniques interms of different measures.

关键词： 6G network mobile communication uav networks energy efficiency clustering metaheuristics

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A Blind DWT-SCHUR Based Digital Video Watermarking Technique

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Journal of Software Engineering and Applications 2015年第4期8卷 224-233页

作者： Lama Rajab Tahani Al-Khatib Ali Al-haj Computer Information Systems The University of Jordan Amman Jordan Princess Sumaya University for Technology Amman Jordan

Digital watermarking is one of the most powerful tools used in ownership and copyrights protection in digital media. This paper presents a blind digital video watermarking technique based on a combination scheme between the Discrete Wavelet transform in (DWT) and the real Schur Decomposition. The scheme starts with applying twolevel DWT to the video scene followed by Schur decomposition in which the binary watermark bits are embedded in the resultant block upper triangular matrix. The proposed technique shows high efficiency due to the use of Schur decomposition which requires fewer computations compared to other transforms. The imperceptibility of the scheme is also very high due to the use of DWT transform;therefore, no visual distortion is noticed in the watermarked video after embedding. Furthermore, the technique proves to be robust against set of standard attacks like: Gaussian, salt and pepper and rotation and some video attacks such as: frame dropping, cropping and averaging. Both capacity and blindness features are also considered and achieved in this technique.

关键词： Video Watermarking Schur Decomposition Discrete Wavelet Transform (DWT)

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CFD based exploration of the dry-low-NO_(x) hydrogen micromix combustion technology at increased energy densities

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Propulsion and Power Research 2017年第1期6卷 15-24页

作者： A.haj Ayed K.Kusterer H.H.-W.Funke J.Keinz D.Bohn B&B-AGEMA GmbH.Jiilicher Str.338 Aachen 52070Germany FH Aachen University of Applied Sciences Hohenstaufenallee 6Aachen 52064Germany RWTH Aachen University Templergraben 55Aachen 52062Germany

Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas tuibine fuel within future low emission power *** to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas tuibine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen ***,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas *** DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x)-*** combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type *** major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x)-emlssions due to a very short residence time of reactants in the flame region of the *** micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density *** aim of the present study is to analyze the influence of different geometry parameter variations on the flame structure and the NO_(x)emission and to identify the most relevant design parameters,aiming to provide a physical understanding of the micromix flame sensitivity to the burner design and identify further optimization potential of this innovative combustion technology while increasing its energy density and making it mature enough for real gas turbine *** study reveals great optimization potential of the micromix combustion technology with respect to the DLN characteristics and gives insight into the impact of geometry modifications on flame structure and NO_(x)*** allows to further increase the energy density of the micromix burners and to integrate this technology in industrial gas turbin

关键词： Micromix combustion Hydrogen gas turbine Dry-low-NO_(x)(DLN)combustion Hydrogen combustion High hydrogen combustion

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Automated Multi-Document Biomedical Text Summarization Using Deep Learning Model

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Computers, Materials & Continua 2022年第6期71卷 5799-5815页

作者： Ahmed S.Almasoud Siwar Ben haj Hassine Fahd N.Al-Wesabi Mohamed K.Nour Anwer Mustafa Hilal Mesfer Al Duhayyim Manar Ahmed Hamza Abdelwahed Motwakel Department of Information Systems College of Computer and Information SciencesPrince Sultan UniversitySaudi Arabia Department of Computer Science College of Science and Arts at MahayilKing Khalid UniversitySaudi Arabia Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of Computer Science College of Computing and Information SystemUmm Al-Qura UniversitySaudi Arabia Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia Department of Natural and Applied Sciences College of Community-AflajPrince Sattam bin Abdulaziz UniversitySaudi Arabia

Due to the advanced developments of the Internet and information technologies,a massive quantity of electronic data in the biomedical sector has been exponentially *** handle the huge amount of biomedical data,automated multi-document biomedical text summarization becomes an effective and robust approach of accessing the increased amount of technical and medical literature in the biomedical sector through the summarization of multiple source documents by retaining the significantly informative ***,multi-document biomedical text summarization acts as a vital role to alleviate the issue of accessing precise and updated *** paper presents a Deep Learning based Attention Long Short Term Memory(DLALSTM)Model for Multi-document Biomedical Text *** proposed DL-ALSTM model initially performs data preprocessing to convert the available medical data into a compatible format for further ***,the DL-ALSTM model gets executed to summarize the contents from the multiple biomedical *** order to tune the summarization performance of the DL-ALSTM model,chaotic glowworm swarm optimization(CGSO)algorithm is *** experimentation analysis is performed to ensure the betterment of the DL-ALSTM model and the results are investigated using the PubMed *** comparative result analysis is carried out to showcase the efficiency of the proposed DL-ALSTM model with the recently presented models.

关键词： Biomedical text summarization healthcare deep learning lstm parameter tuning

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Optimal Bidirectional LSTM for Modulation Signal Classification in Communication Systems

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Computers, Materials & Continua 2022年第8期72卷 3055-3071页

作者： Manar Ahmed Hamza Siwar Ben haj Hassine Souad Larabi-Marie-Sainte Mohamed K.Nour Fahd N.Al-Wesabi Abdelwahed Motwakel Anwer Mustafa Hilal Mesfer Al Duhayyim Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia Department of Computer Science College of Science and ArtsKing Khalid UniversityMahayil AsirSaudi Arabia Department of Computer Science College of Computer and Information SciencesPrince Sultan UniversitySaudi Arabia Department of Computer Science College of Computing and Information SystemUmm Al-Qura UniversitySaudi Arabia Department of Computer Science College of Science&Art at MahayilKing Khalid UniversitySaudi Arabia Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of Natural and Applied Sciences College of Community-AflajPrince Sattam bin Abdulaziz UniversitySaudi Arabia

Modulation signal classification in communication systems can be considered a pattern recognition *** works have focused on several feature extraction approaches such as fractal feature,signal constellation reconstruction,*** recent advent of deep learning(DL)models makes it possible to proficiently classify the modulation *** this view,this study designs a chaotic oppositional satin bowerbird optimization(COSBO)with bidirectional long term memory(BiLSTM)model for modulation signal classification in communication *** proposed COSBO-BiLSTM technique aims to classify the different kinds of digitally modulated *** addition,the fractal feature extraction process takes place by the use of Sevcik Fractal Dimension(SFD)***,the modulation signal classification process takes place using BiLSTM with fully convolutional network(BiLSTM-FCN).Furthermore,the optimal hyperparameter adjustment of the BiLSTM-FCN technique takes place by the use of COSBO *** order to ensure the enhanced classification performance of the COSBO-BiLSTM model,a wide range of simulations were carried *** experimental results highlighted that the COSBO-BiLSTM technique has accomplished improved performance over the existing techniques.

关键词： Complex systems communication system signal processing modulation signals classification artificial intelligence deep learning parameter tuning

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Fabrication, Characterization and Optical Properties of CuIn<sub>3</sub>Se<sub>5</sub>Bulk Compounds

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World Journal of Condensed Matter Physics 2015年第3期5卷 201-208页

作者： Dayane Habib Ouloum Aoudé Slyman Karishy Georges El haj Moussa Physics Department Faculty of Sciences II Lebanese University Jdeidet Lebanon Physics Department Faculty of Sciences IV Lebanese University Zahleh Lebanon Centre Electronique et Micro-optoélectronique de Montpellier (CEM2) Faculté Sciences et Techniques du Languedoc Université de Montpellier II Montpellier France

The present work prepared the CuIn3Se5 ingots by using a horizontal Bridgman method and investigated the Energy Dispersive Spectrometry (EDS) and X-Ray Diffraction (XRD) to calculate the compositions of the ingots. Photoluminescence was used to check their optical properties. It was found that CuIn3Se5 had either a Stanite structure, an Ordered Defect Chalcopyrite (ODC) structure, or an Ordered Vacancy Chalcopyrite (OVC) structure. The gap energy obtained by Photoluminescence (PL) for the different samples is 1.23 eV. Studying the variation of the gap as a function of the temperature shows that the transition is a D-A type.

关键词： Chalcopyrite Photovoltaic Photoluminescence Optical Response X-Ray Diffraction

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An Algorithm for Robust Routing Strategies in Networks

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Journal of Traffic and Transportation Engineering 2017年第1期5卷 8-20页

作者： Farida Manseur Nadir Farhi Habib haj-Salem Jean Patrick-Lebacque University of Paris-Est IFSTTAR/COSYS/GRETTIA F-77447 Champs-sur Marne Cedex France

In this article, the authors address the problem of optimal guidance of road network users. In the literature, several routing algorithms have been proposed under different approaches to solve this problem. Most adaptive algorithms for optimal path are based on the least expected travel time. Another approach has emerged named the SOTA （stochastic on time arrival）. This approach based on the idea of Frank （1969）, which aims to maximize the probability of arriving to a destination node parting from a given node in the network and with a given time budget. The authors＇ contribution consists here in extending this approach in order to introduce robustness towards path failure, in the guidance optimization. The authors propose a model that includes the existence as well as the performance of detours for selected paths, in the calculus of the travel time reliability. This new way of calculating travel time reliability guarantees a kind of robustness of the optimal guidance strategy.

关键词： Optimal guidance travel-time reliability robustness optimization traffic control.

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Improvement study for the dry-low-NO_(x) hydrogen micromix combustion technology

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Propulsion and Power Research 2015年第3期4卷 132-140页

作者： A.haj Ayed K.Kusterer H.H.-W.Funke J.Keinz C.Striegan D.Bohn B&B-AGEMA GmbH Jülicher Str.338Aachen 52070Germany FH Aachen University of Applied Sciences Hohenstaufenallee 6Aachen 52064Germany RWTH Aachen University Templergraben 55Aachen 52062Germany

The dry-low-NO_(x)(DLN)micromix combustion principle is developed for the low emission combustion of hydrogen in an industrial gas turbine APU GTCP *** further decrease of NO_(x) emissions along a wider operation range with pure hydrogen supports the introduction of the micromix technology to industrial *** and numerical studies show the successful advance of the DLN micromix combustion to extended DLN operation *** impact of the hydrogen fuel properties on the combustion principle and aerodynamic flame stabilization design laws,flow field,flame structure and emission characteristics is investigated by numerical analysis using an eddy dissipation concept combustion model and validated against experimental results.

关键词： Hydrogen NO_(x) Emission reduction Micromix Jet in cross-flow Combustion

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Experimental and numerical investigations of the dry-low-NO_(x) hydrogen micromix combustion chamber of an industrial gas turbine

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Propulsion and Power Research 2015年第3期4卷 123-131页

Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas turbine fuel within future low emission power *** to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas turbine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen ***,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas *** DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x) *** combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type *** major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x) emissions due to a very short residence time of reactants in the flame region of the *** micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density *** aim of the present study is to apply and compare different combustion models for the characterization of the micromix flame structure,its interaction with the flow field and its NO_(x) *** study reveals great potential for the successful application of numerical flow simulation to predict flame structure and NO_(x) emission level of micromix hydrogen combustion,help understanding the flow phenomena related with the micromixing,reaction zone and NO_(x) formation and support further optimization of the burner performance.

关键词： Micromix combustion Hydrogen gas turbine Dry-low-NO_(x)(DLN) combustion Hydrogen combustion High hydrogen combustion

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