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Gastroenterology Report 2016年第3期4卷 251-253,I0003页

作者： mohammed amine benatta Digestive Endoscopy Unit Military Central HospitalAlgiersAlgeria

Trichobezoars are rare,composed of hair and more common in female pediatric patients with psychiatric *** extraction is the most common removal *** two endoscopic removals after fragmentation have beenreported in the English *** report herein a third case of a trichobezoar that was successfully retrieved afterendoscopic fragmentation with snare polypectomy and argon plasma coagulation in a six-year-old female *** mass was completely removed in 10 pieces after 15 *** patient’s course was *** monthslater,she is doing *** endoscopic removal was effective,minimally invasive and time saving.

关键词： trichobezoar retrieval endoscopic fragmentation

RING OPENING POLYMERIZATION OF TETRAHYDROFURAN CATALYSED BY MAGHNITE-H^+

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Chinese Journal of Polymer Science 2012年第1期30卷 56-62页

作者： Khadidja Benkenfoud amine Harrane mohammed Belbachir Laboratoire de Chimie des Polymeres Departement de Chimie Faculte des SciencesUniversite d'Oran Es-SeniaBP No 1524 El M'Naouar31000 OranAlgeria

The cationic ring-opening polymerization of tetrahydrofiiran using maghnite-H~＋ is ***-H~＋,is a non-toxic solid catalyst issued from proton exchanged montmorillonite ***,also called ＂poly（butandiol） ether＂,with acetate and hydroxyl end groups was successfully *** of reaction temperature, weight ratio of initiator/monomer and reaction time on the conversion of monomer and on the molecular weight are investigated.A cationic mechanism of the reaction was *** chemistry can be considered as a suitable route for preparing poly（THF） as a soft segment for thermoplastic elastomers.

关键词： Montmorillonite Maghnite Ring opening polymerization THF

Influence of Discretization Step on Asymptotic Stability of a Certain Class of Two-dimensional Continuous-discrete Fractional Linear Systems

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Acta Mathematicae Applicatae Sinica 2022年第1期38卷 68-77页

作者： Souad BOUGUESSA Djillali BOUAGADA mohammed amine GHEZZAR Department of Mathematics and Computer Science ACSY Team-Laboratory of Pure and Applied Mathe-maticsAbdelhamid Ibn Badis University MostaganemP.O.Box 227/118University of Mostaganem27000 MostaganemAlgeria

The effectiveness of this paper lies in the influence of the discretization step on the asymptotic stability of the positive two-dimensional fractional linear *** aims at investigating whether,how and when this step affects the asymptotically stable two-dimensional positive fractional linear continuous-discrete *** accomplish this study,a new test was outlined and used so that the asymptotic stability of the system was measured both before and after being exposed to the sampling ***,the conditions of that stability were *** a result,the outcome of the approximation shows that the stability is preserved under a particular set of *** this basis,the newly proposed approach is recommended for testing the intended stability of such systems.A numerical example is tested to show the accuracy and the applicability of the proposed tests.

关键词： discretization positivity stability two-dimensional systems

Performance Evaluation of Bottom-Standing Submerged Breakwaters in Regular Waves Using the Meshless Singular Boundary Method

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Journal of Ocean University of China 2019年第4期18卷 823-833页

作者： SENOUCI Fawzi CHIOUKH Nadji DRIS mohammed El-amine Department of Hydraulics University Djillali Liabes of Sidi Bel-Abbes Sidi Bel-Abbes 22000 Algeria Laboratory of Naval Aero-Hydrodynamics USTO MB Oran 31000 Algeria Laboratory of Civil Engineering and Environment University Djillali Liabes of Sidi Bel-Abbes Sidi Bel-Abbes 22000 Algeria

In this paper, the improved version of the meshless singular boundary method (ISBM) is developed for analyzing the hydrodynamic performance of bottom-standing submerged breakwaters in regular normally incident waves. Both the single and dual prismatic breakwaters of rectangular and trapezoidal forms are examined. Only the impermeable breakwaters are considered in this study. The physical problem is cast in terms of the Laplace equation governing an irrotational flow and incompressible fluid motion with the appropriate mixed-type boundary conditions, and it is solved numerically using the ISBM. The numerical results are presented in terms of the hydrodynamic quantities of reflection and transmission coefficients. The values are first validated against the data of previous studies, computed, and discussed for a variety of structural conditions, including the height, width, and spacing of breakwater submergence. An excellent agreement is observed between the ISBM results and those of other methods. The breakwater width is found to feature marginal effects compared with the height. The present method is shown to accurately predict the resonant conditions at which the maximum reflection and transmission occur. The trapezoidal breakwaters are found to generally present a wide spectrum of reflections, suggesting that they would function better than the rectangular breakwaters. The dual breakwater systems are confirmed to perform much better than single structures.

关键词： meshless improved singular boundary method regular normal waves rectangular and trapezoidal breakwaters reflection transmission

A new correlation-based approach for ensemble selection in random forests

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International Journal of Intelligent Computing and Cybernetics 2021年第2期14卷 251-268页

作者： Mostafa El Habib Daho Nesma Settouti mohammed El amine Bechar Amina Boublenza mohammed amine Chikh Biomedical Engineering Laboratory University of TlemcenTlemcenAlgeria

Purpose-Ensemble methods have been widely used in the field of pattern recognition due to the difficulty offinding a single classifier that performs well on a wide variety of *** the effectiveness of thesetechniques,studies have shown that ensemble methods generate a large number of hypotheses and thatcontain redundant classifiers in most *** works proposed in the state of the art attempt to reduce allhypotheses without affecting ***/methodology/approach-In this work,the authors are proposing a pruning method that takes intoconsideration the correlation between classifiers/classes and each classifier with the rest of the *** authorshave used the random forest algorithm as trees-based ensemble classifiers and the pruning was made by atechnique inspired by the CFS(correlation feature selection)***-The proposed method CES(correlation-based Ensemble Selection)was evaluated onten datasets from the UCI machine learning repository,and the performances were compared to sixensemble pruning *** results showed that our proposed pruning method selects a smallensemble in a smaller amount of time while improving classification rates compared to the ***/value-CES is a new ordering-based method that uses the CFS *** selects,in a shorttime,a small sub-ensemble that outperforms results obtained from the whole forest and the other state-of-thearttechniques used in this study.

关键词： Ensemble pruning Random forest Tree selection Correlation CFS CES

Convergence of computing,communication,and caching in internet of things

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Intelligent and Converged Networks 2020年第1期1卷 18-36页

作者： mohammed amine Bouras Fadi Farha Huansheng Ning School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China

Internet of Things(IoTs)is a big world of connected objects,including the small and low-resources devices,like sensors,as well as the full-functional computing devices,such as servers and routers in the core *** the emerging of new IoT-based applications,such as smart transportation,smart agriculture,healthcare,and others,there is a need for making great efforts to achieve a balance in using the IoT resources,including Computing,Communication,and *** paper provides an overview of the convergence of Computing,Communication,and Caching(CCC)by covering the IoT technology *** first,we give a snapshot of technology trends in communication,computing,and *** well,we describe the convergence in sensors,devices,and *** the aspect of convergence,we discuss the relationship between CCC technologies in collecting,indexing,processing,and storing data in ***,we introduce the three dimensions of the IoTs based on *** explore different existing technologies that help to solve bottlenecks caused by a large number of physical devices in ***,we propose future research directions and open problems in the convergence of communication,computing,and cashing with sensing and actuating devices.

关键词： convergence computing communication caching sensing actuating Internet of Things(IoTs)

Modelling the monthly hydrological balance using Soil and Water Assessment Tool(SWAT)model:A case study of the Wadi Mina upstream watershed

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Journal of Groundwater Science and Engineering 2024年第2期12卷 161-177页

作者： Hanane Mebarki Noureddine Maref mohammed El-amine Dris Civil Engineering and Environmental Laboratory(LGCE) University of Djillali LiabèsFaculty of TechnologyHydraulics departmentBen M'Hidi districtP.O.Box 8922000Sidi Bel AbbèsAlgeria.

Modelling the hydrological balance in semi-arid zones is essential for effective water resource management,encompassing both surface water and *** study aims to model the monthly hydrological water cycle in the Wadi Mina upstream watershed(northwest Algeria)by applying the Soil and Water Assessment Tool(SWAT)hydrological *** modelling integrates spatial data such as the Digital Elevation Model(DEM),land use,soil types and various meteorological parameters including precipitation,maximum and minimum temperatures,relative humidity,solar radiation and wind *** SWAT model was calibrated and validated using data from January 2012 to December 2014,with a calibra-tion period from January 2012 to August 2013 and a validation period from September 2013 to December *** and parameter calibration were conducted using the SWAT-SA program,and model performance evaluation relied on comparing the observed discharge at the outlet of the basin with model-simulated discharge,assessed through statistical coefficients including Nash-Sutcliffe Efficiency(NSE),coefficient of determination(R2)and Percent Bias(PBAIS).Calibration results indicated favourable objec-tive function values(NSE=0.79,R2=0.93,PBAIS=-8.53%),although a slight decrease was observed during validation(NSE=0.69,R2=0.86,and PBAIS=-11.41%).The application of the SWAT model to the Wadi Mina upstream watershed highlighted its utility in simulating the spatial distribution of different components of the hydrological balance in this *** SWAT model revealed that approximately 71%of the precipitation in the basin evaporates,while only 29%contributes to surface runoff or infiltration into the soil.

关键词： SWAT model Performance Parameters Runoff Groundwater Wadi

Incidence, clinical features and para-clinical findings of achalasia in Algeria: Experience of 25 years

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World Journal of Gastroenterology 2016年第38期22卷 8615-8623页

作者： Amar Tebaibia mohammed amine Boudjella Djamel Boutarene Farouk Benmediouni Hakim Brahimi Nadia Oumnia Internal Medicine Department Kouba HospitalUniversity of Algiers 1 Department of Epidemiology National Public Health InstituteEl BiarUniversity of Algiers 1

AIM To investigate the incidence of achalasia in Algeria and to determine its clinical and para-clinical profile. To evaluate the impact of continuing medical education(CME) on the incidence of this *** From 1990 to 2014, 1256 patients with achalasia were enrolled in this prospective study. A campaign of CME on diagnosis involving different regions of the country was conducted between 1999 and 2003. Annual incidence and prevalence were calculated by relating the number of diagnosed cases to 105 inhabitants. Each patient completed a standardized questionnaire, and underwent upper endoscopy, barium swallow and esophageal manometry. We systematically looked for Allgrove syndrome and familial *** The mean annual incidence raised from 0.04(95%CI: 0.028-0.052) during the 1990 s to 0.27/105 inhabitants/year(95%CI: 0.215-0.321) during the 2000 s. The incidence of the disease was two and half times higher in the north and the center compared to the south of the country. One-hundred-and-twenty-nine(10%) were children and 97(7.7%) had Allgrove syndrome. Familial achalasia was noted in 18 different families. Patients had dysphagia(99%), regurgitation(83%), chest pain(51%), heartburn 24.5% and weight loss(70%). The lower esophageal sphincter was hypertensive in 53% and hypotensive in 0.6%.CONCLUSION The mean incidence of achalasia in Algeria is at least 0.27/105 inhabitants. A good impact on the incidence of CME was noted. A gradient of incidence between different regions of the country was found. This variability is probably related to genetic and environmental factors. The discovery of an infantile achalasia must lead to looking for Allgrove syndrome and similar cases in the family.

关键词： Achalasia Incidence Allgrove syndrome Manometry Continuing medical education

The Mechanical and Crystallographic Evolution of Stipa tenacissima Leaves During In-Soil Biodegradation

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Journal of Renewable Materials 2018年第3期6卷 336-346页

作者： Zakia Khelifi mohammed amine Allal Nabil Abou-bekr Said Taibi Benoit Duchemin Normandy University ULHCNRSLOMC76600 Le HavreFrance University of Tlemcen Lab-EOLEBP 23013000 TlemcenAlgeria

The in-soil biodegradation of Stipa tenacissima(alfa)leaves was ***-linear mechanical testing was performed at various biodegradation *** strength,loading and unloading Young’s moduli and dissipation energy decreased with the burial time,whereas plasticity ***-emission scanning electron microscopy(FE-SEM)showed that the fracture cracks propagated in the longitudinal direction in the raw material,resulting in a fracture mode consisting of a mixture of middle lamella delamination and fiber *** contrast,the cracks were perpendicular to the stem axis in the biodegraded material,demonstrating an important strength loss of the load-bearing *** strength loss was correlated with rapid cellulose degradation.A novel X-ray diffraction(XRD)model was implemented in order to take into account anisotropic size *** the first time,XRD demonstrated the action of biodegradation on unrefined plant tissues under quasi in-situ *** induced a progressive loss of crystalline cellulose accompanied with anisotropic crystallite thinning.

关键词： Alfa mechanical testing FE-SEM XRD biodegradation

An energy-degree evaluation metric for clustering purposes in mobile ad hoc networks

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International Journal of Modeling, Simulation, and Scientific Computing 2019年第2期10卷 114-132页

作者： Khalil amine MOAD6 Research Team MASI LaboratoryE3S Research Centre Mohammadia School of Engineering Mohammed V University of RabatMorocco

Network clustering is the process of partitioning a network into a number of virtual entities mastered by certain nodes,called cluster centers that are responsible for collecting and maintaining topology information and managing the routing *** ad hoc networking,clustering has been introduced to deal with the dynamic topology by providing a temporarily stable network *** process mainly depends on the metric upon which the selection of cluster centers is performed.A wide range of clustering metrics were introduced in the literature based on network issues including mobility and connectivity degree,giving rise to a variety of clustering *** clustering provides energy consumption reduction,residual energy has not received enough attention and few studies have addressed the clustering on the basis of this *** paper discusses the current clustering metrics and proposes an energy-degree evaluation metric with mobility consideration taking into account the nodes residual energy and the network connectivity as two main keys of clustering.

关键词： Ad hoc networks clustering dominating set energy aware mobility