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Deep Learning Empowered Cybersecurity Spam Bot Detection for Online Social Networks

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Computers, Materials & Continua 2022年第3期70卷 6257-6270页

作者： Mesfer Al Duhayyim Haya Mesfer Alshahrani Fahd NAl-Wesabi mohammed Alamgeer Anwer Mustafa Hilal mohammed Rizwanullah Department of Natural and Applied Sciences College of Community-AflajPrince Sattam bin Abdulaziz UniversitySaudi Arabia Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversitySaudi Arabia Department of Computer Science King Khalid UniversityMuhayel AseerSaudi Arabia&Faculty of Computer and ITSana’a UniversitySana’aYemen Department of Information Systems King Khalid UniversityMuhayel AseerSaudi Arabia Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia

Cybersecurity encompasses various elements such as strategies,policies,processes,and techniques to accomplish availability,confidentiality,and integrity of resource processing,network,software,and data from *** this scenario,the rising popularity of Online Social Networks(OSN)is under threat from spammers for which effective spam bot detection approaches should be *** studies have developed different approaches for the detection of spam bots in *** those techniques primarily concentrated on hand-crafted features to capture the features of malicious users while the application of Deep Learning(DL)models needs to be *** this motivation,the current research article proposes a Spam Bot Detection technique using Hybrid DL model abbreviated as *** proposed SBD-HDL technique focuses on the detection of spam bots that exist in *** technique has different stages of operations such as pre-processing,classification,and parameter ***,SBD-HDL technique hybridizes Graph Convolutional Network(GCN)with Recurrent Neural Network(RNN)model for spam bot classification *** order to enhance the detection performance of GCN-RNN model,hyperparameters are tuned using Lion Optimization Algorithm(LOA).Both hybridization of GCN-RNN and LOA-based hyperparameter tuning process make the current work,a first-of-its-kind in this *** experimental validation of the proposed SBD-HDL technique,conducted upon benchmark dataset,established the supremacy of the technique since it was validated under different measures.

关键词： Cybersecurity spam bot data classification social networks twitter deep learning

Adaptation of ant supercolony behavior to solve route assignment problem in integers

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International Journal of Intelligent Computing and Cybernetics 2018年第3期11卷 423-442页

作者： Lahna Idres mohammed Said Radjef Research Unit LaMOS Department of Operational ResearchExact Sciences FacultyBejaia UniversityBejaiaAlgeria

Purpose-Until now,the algorithms used to compute an equilibrate route assignment do not return an integer *** disagreement constitutes a non-negligible *** fact,it is shown in the literature that a fractional solution is not a good approximation of the integer *** purpose of this paper is to find an integer route ***/methodology/approach-The static route assignment problem is modeled as an asymmetric network congestion ***,an algorithm inspired from ant supercolony behavior is constructed,in order to compute an approximation of the Pure Nash Equilibrium(PNE)of the considered *** variants of the algorithm,which differ by their initializing steps and/or the kind of the provided algorithm information,are ***-An evaluation of these variants over different networks is conduced and the obtained results are ***,the adaptation of ant supercolony behavior to solve the problem under consideration shows interesting results,since most of the algorithm’s variants returned high-quality approximation of PNE in more than 91 percent of the treated ***/value-The asymmetric network congestion game is used to model route assignment *** algorithm with several variants inspired from ant supercolony behavior is *** the classical ant colony algorithms where there is one nest,herein,several nests are *** deposit pheromone of an ant from a given nest is useful for the ants of the other nests.

关键词： Game theory Ant supercolony e-Pure Nash Equilirium Integer route assignment

FreeD^(*):a mechanism for finding a short and collision free path

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IET Cyber-Systems and Robotics 2019年第2期1卷 55-62页

作者： mohammed Al-darwbi Uthman Baroudi Department of Computer Science New Brunswick UniversityNew BrunswickCanada Computer Engineering Department King Fahd University of Petroleum&MineralsDhahranKingdom of Saudi Arabia

Path planning is extensively used in different fields not only in robotics but also in games,manufacturing,auto-motive applications,and so *** path planning is one of the major research issues in the area of autonomous mobile *** critical step in path planning problem is to find the shortest path from the start position to a defined goal position through a known,unknown,or partially known *** events that may devastate some parts of the intended area convert those areas to untraversable *** events introduce topological constraints for the robot motion because of information discrepancy about the environment before and after the *** this study,the authors propose a novel method,FreeD^(*),to find the shortest path by exploiting the benefits of D^(*),Dijkstra,and artificial potential field(APF)*** generated path using D^(*)is optimised using Dijkstra by combining D^(*)sub-paths into a single diagonal path if there is no known obstacle between ***,APF is used in unknown obstacle *** simulation results using Webots simulator demonstrate the effectiveness of FreeD^(*)in avoiding unknown obstacles with shortest path.

关键词： robot Dijkstra shortest

Characterization of Ni-P coating on AZ91D magnesium alloy with surfactants and nano-additives

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Journal of Magnesium and Alloys 2014年第4期2卷 293-298页

作者： mohammed Sahal Department of Mechanical Engineering NIT CalicutKeralaIndia

Direct electroless Ni-P plating was done on AZ91D magnesium alloy by immersing magnesium AZ91D samples into a bath containing Nickel *** nucleation mechanism of Ni-P deposits on the AZ91D magnesium alloy in the presence of surfactants and nano-additives was studied by using *** electroless Ni-P deposits were preferentially nucleated on the β Mg_(17)Al_(12) phase of AZ91D magnesium ***-P coating was coated uniformly in the presence of *** of surfactant C-Tab with varying quantities was *** of surfactant C-Tab homogenized the Ni-P deposition on AZ91D magnesium alloy *** effect produced by surfactant C-Tab was maximum with minimum addition(1 g/l)of surfactant C-Tab further increase in the surfactant C-Tab quantity did not brought much changes in *** of surfactant SLS was studied using *** SLS when incorporated in small amounts(6 g/l and 12 g/l)only exerted a slight influence in Ni-P deposition on AZ91D alloy *** Ni-P deposition was more uniform and spread throughout the surface with the addition of SLS surfactant(18 g/l).Effect of nano additives Al_(2)O_(3),ZnO,SiO_(2) were *** additive Al_(2)O_(3) enhanced the deposition of Ni-P on AZ91D alloy when added in 0.6 g/l ***_(2) addition also gave the same *** addition influenced the Ni-P deposition on AZ91D alloy ***-P surface coating was coated more uniform and spread throughout the surface with the addition of surfactants and nano-additives.

关键词： Surfactants Magnesium Nano-additives Scanning electron microscopy

A Methodology to Reduce Thermal Gradients Due to the Exothermic Reactions in Resin Transfer Molding Applications

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Fluid Dynamics & Materials Processing 2023年第1期19卷 95-103页

作者： Aouatif Saad mohammed EL Ganaoui Advanced Systems Engineering Laboratory National School of Applied SciencesIbn Tofail UniversityKenitra242Morocco LERMAB/IUT Longwy Institut CarnotNancy186France

Resin transfer molding(RTM)is among the most used manufacturing processes for composite ***,the resin cure is initiated by heat supply to the *** supplementary heat generated during the reaction can cause thermal gradients in the composite,potentially leading to undesired residual stresses which can cause shrinkage and *** the present numerical study of these processes,a one-dimensional finite difference method is used to predict the temperature evolution and the degree of cure in the course of the resin polymerization;the effect of some parameters on the thermal gradient is then analyzed,namely:the fiber nature,the use of multiple layers of reinforcement with different thermal properties and also the temperature cycle *** validity of this numerical model is tested by comparison with experimental and numerical results in the existing literature.

关键词： Cure RTM finite difference method thermal gradients residual stresses

Adaptive Control System for Biogas Power Plant Using Model Predictive Control

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1193-1204页

作者： Samaa Fawzy mohammed Saeed Abdelfattah Eladl Magdi El-Saadawi Electrical Engineering Department Mansoura UniversityMansouraEgypt

This paper presents an adaptive control system using model predictive control for a biogas-fueled power *** control scheme is derived from an anaerobic digestion model that includes the concentration of biodegradable volatile solid in the reactor,the concentration of volatile solid in influent,the concentration of acidogens,and the concentration of *** these concentrations are the state variables of model predictive *** whole biogas-fueled power system has been modeled,implemented,and tested in MATLAB/Simulink *** validate the performance of the proposed controller,different operation conditions are studied and *** simulation results prove the effectiveness and the applicability of the proposed control system under different operating conditions.

关键词： Anaerobic digestion micro-turbine model predictive control state space biogas

Lattice Boltzmann Modeling of Viscous Elementary Flows

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Advances in Applied Mathematics and Mechanics 2010年第4期2卷 467-482页

作者： mohammed A.Boraey Marcelo Epstein Mechanical and Manufacturing Engineering Department University of Calgary2500 University Drive NWCalgaryAlbertaT2N 1N4Canada

A lattice Boltzmann method is developed for modeling viscous elementary *** adjustable source term is added to the lattice Boltzmann equation,which can be tuned to model different elementary flow features like a doublet or a point source of any strength,including a negative source(sink).The added source term is dimensionally consistent with the lattice Boltzmann *** proposed model has many practical applications,as it can be used in the framework of the potential flow theory of viscous and viscoelastic *** model can be easily extended to the three dimensional *** model is verified by comparing its results with the analytical solution for some benchmark *** results are in good agreement with the analytical solution of the potential flow theory.

关键词： The Lattice Boltzmann method Chapman-Enskog expansion source term point source point sink doublet viscous elementary flows potential flow theory symmetry

Investigation of MS and Anti-segregation Process HSS Flat Broaching Tools

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厦门大学学报（自然科学版） 2002年第S1期41卷 106-107页

作者： mohammed Sarwar Industrial Research & Consultancy Centre

An investigation has been carried out to compare th e cutting performance and tool life evaluation of high speed steel broach samp les. The comparison has been done between conventional M2 and Anti-Segregation Process (ASP) ASP53 and ASP30 high speed steel broach samples. The ASP53 was a development material. The cutting performance was evaluated by measuring the c utting forces and calculating the specific cutting energy, an indicator of cutti ng performance. As the roughness of the machined surface is an important criter ion in the evaluation of performance of a tool, the surface roughness of the workpiece was studied as a function of undeformed chip thickness. The workpiec e material was 150M36 alloy steel used in manufacture of automobile engines. Th e performance tests were conducted at two cutting speeds, which were 0 7 m/min and 10.5 m/min respectively. This allowed a better understanding of the effect of cutting speed on tool performance. The wear tests were performed at a cuttin g speed on 10.5 m/min. The cutting edges of ASP broach samples were finer compared to that of M2. Ther e was no practical difference in the cutting forces and the specific cutting ene rgy while cutting with MS, ASP30 and ASP53 broach samples. The ASP30 and ASP53 tools have a better surface roughness on the machined surface than that of M2 at both cutting speeds. The ASP30 gave 2.25 times the life and an improved surfac e finish compared to M2 steel. The ASP53 gave 1.3 times the life of M2 steel. These results should prove useful to the tool designer and manufacturing enginee r.

关键词： Investigation of MS and Anti-segregation Process HSS Flat Broaching Tools MS

Slope stability analysis of Southern slope of Chengmenshan copper mine,China

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International Journal of Mining Science and Technology 2015年第2期25卷 171-175页

作者： mohammed Mnzool Wan Ling Wei Zuo'an State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University College of Resource and Environmental Science Chongqing University College of Aerospace Engineering Chongqing University

The engineering geology and hydrogeology in the southern slope of Chengmenshan copper mine are very complicated,because there is a soft-weak layer between two kinds of *** investigations demonstrate that some instability problems might occur in the *** this research,the southern slope,which is divided into six sections(I-0,I-1,I-2,II-0,II-1 and II-2),is selected for slope stability analysis using limit equilibrium and numerical *** results show that the values of factor of safety(FOS) of sections I-0,I-1 and I-2 are very low and slope failure is likely to *** reinforcement subjected to seismic,water and weak layer according to sections were carried out to increase the factor of safety of the three sections,two methods were used;grouting with hydration of cement and water to increase the cohesion(c) and pre-stressed *** of reinforcement showed that factor of safety increased more than 1.15.

关键词： Slope stability Limit equilibrium method Numerical method Slope reinforcement