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MLD-MPC Approach for Three-Tank Hybrid Benchmark Problem

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Computers, Materials & Continua 2023年第5期75卷 3657-3675页

作者： Hanen Yaakoubi Hegazy Rezk mujahed al-dhaifallah Joseph Haggège Research Laboratory in Automatic Control(LARA) National Engineering School of Tunis(ENIT)University of Tunis El ManarTunis1002Tunisia Department of Electrical Engineering College of Engineering in Wadi AlddawasirPrince Sattam bin Abdulaziz UniversityWadi Alddawasir11911Saudi Arabia Control and Instrumentation Engineering Department King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center(IRC)for Renewable Energy and Power Systems King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia

The present paper aims at validating a Model Predictive Control(MPC),based on the Mixed Logical Dynamical(MLD)model,for Hybrid Dynamic Systems(HDSs)that explicitly involve continuous dynamics and discrete *** proposed benchmark system is a three-tank process,which is a typical case study of *** MLD-MPC controller is applied to the level control of the considered tank *** study is initially focused on the MLD approach that allows consideration of the interacting continuous dynamics with discrete events and includes the operating *** feature of MLD modeling is very advantageous when an MPC controller synthesis for the HDSs is *** the MLD model of the system is well-posed,then the MPC law synthesis can be developed based on the Mixed Integer Programming(MIP)optimization *** solving this MIP problem,a Branch and Bound(B&B)algorithm is proposed to determine the optimal control ***,a comparative study is carried out to illustrate the effectiveness of the proposed hybrid controller for the HDSs compared to the standard MPC *** results show that the MLD-MPC approach outperforms the standardMPCone that doesn’t consider the hybrid aspect of the *** paper also shows a behavioral test of the MLDMPC controller against disturbances deemed as liquid leaks from the *** results are very satisfactory and show that the tracking error is minimal less than 0.1%in nominal conditions and less than 0.6%in the presence of *** results confirm the success of the MLD-MPC approach for the control of the HDSs.

关键词： Hybrid dynamic system model predictive control mixed logical dynamical model mixed integer programming three-tank hybrid system

Path Planning of Quadrotors in a Dynamic Environment Using a Multicriteria Multi-Verse Optimizer

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Computers, Materials & Continua 2021年第11期69卷 2159-2180页

作者： Raja Jarray mujahed al-dhaifallah Hegazy Rezk Soufiene Bouallègue Research Laboratory in Automatic Control(LARA) National Engineering School of Tunis(ENIT)University of Tunis El ManarTunis1002Tunisia Department of Systems Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911Saudi Arabia Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt High Institute of Industrial Systems of Gabès(ISSIG) University of GabèsGabès6011Tunisia

Paths planning of Unmanned Aerial Vehicles(UAVs)in a dynamic environment is considered a challenging task in autonomous flight control *** this work,an efficient method based on a Multi-Objective MultiVerse Optimization(MOMVO)algorithm is proposed and successfully applied to solve the path planning problem of quadrotors with moving *** a path planning task is formulated as a multicriteria optimization problem under operational *** proposed MOMVO-based planning approach aims to lead the drone to traverse the shortest path from the starting point and the target without collision with moving *** vehicle moves to the next position from its current one such that the line joining minimizes the total path length and allows aligning its direction towards the *** choose the best compromise solution among all the non-dominated Pareto ones obtained for compromise objectives,the modified Technique for Order Preference by Similarity to Ideal Solution(TOPSIS)is investigated.A set of homologous metaheuristics such as Multiobjective Salp Swarm algorithm(MSSA),Multi-Objective Grey Wolf Optimizer(MOGWO),Multi-Objective Particle Swarm Optimization(MOPSO),and Non-Dominated Genetic algorithm II(NSGAII)is used as a basis for the performance *** results and statistical analyses show the superiority and effectiveness of the proposed MOMVO-based planning *** obtained results are satisfactory and encouraging for future practical implementation of the path planning strategy.

关键词： Quadrotors path planning dynamic obstacles multi-objective optimization global metaheuristics TOPSIS decision-making Friedman statistical tests

Accurate Fault Location Modeling for Parallel Transmission Lines Considering Mutual Effect

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Computers, Materials & Continua 2021年第4期67卷 491-518页

作者： Hamdy A.Ziedan Hegazy Rezk mujahed al-dhaifallah Department of Electrical Engineering Faculty of EngineeringAssiut UniversityAssiut71518Egypt College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911KSA Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt Department of Systems Engineering King Fahd University of Petroleum&MineralsDhahran31261KSA

:A new accurate algorithms based on mathematical modeling of two parallel transmissions lines system(TPTLS)as influenced by the mutual effect to determine the fault location is discussed in this *** distance relay measures the impedance to the fault location which is the *** principle of summation the positive-,negative-,and zero-sequence voltages which equal zero is used to determine the fault location on the ***,the impedance of the transmission line to the fault location is *** algorithms are applied to single-line-to-ground(SLG)and double-line-to-ground(DLG)*** detect the fault location along the transmission line,its impedance as seen by the distance relay is determined to indicate if the fault is within the relay’s reach *** under study are fed from one-and both-ends.A schematic diagrams are obtained for the impedance relays to determine the fault location with high accuracy.

关键词： New accurate algorithms mathematical modeling fault location scheme diagrams parallel transmission lines mutual effect SLG and DLG faults

Optimal Selection of Hybrid Renewable Energy System Using Multi-Criteria Decision-Making algorithms

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Computers, Materials & Continua 2021年第8期68卷 2001-2027页

作者： Hegazy Rezk Irik Z.Mukhametzyanov mujahed al-dhaifallah Hamdy A.Ziedan College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911KSA Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt Center for Strategic and Interdisciplinary Research Ufa Federal Research Centre of the Russian Academy of SciencesUfa450054Republic of BashkortostanRussia Department of Systems Engineering King Fahd University of Petroleum&MineralsDhahran31261KSA Department of Electrical Engineering Faculty of EngineeringAssiut UniversityAssiut71518Egypt

Several models of multi-criteria decision-making(MCDM)have identified the optimal alternative electrical energy sources to supply certain load in an isolated region in al-Minya City,*** load demand consists of water pumping system with a water desalination *** options containing three different power sources:only DG,PV-B system,and hybrid PV-DG-B,two different sizes of reverse osmosis(RO)units;RO-250 and RO-500,two strategies of energy management;load following(LF)and cycle charging(CC),and two sizes of DG;5 and 10 kW were taken into *** attributes,including operating cost,renewable fraction,initial cost,the cost of energy,excess energy,unmet load,breakeven grid extension distance,and the amount of CO_(2),were used during the evaluation *** estimate these parameters,HOMER®software was employed to perform both the simulation and optimization *** different weight estimation methods were considered;no priority of criteria,based on a pairwise comparisons matrix of the criteria,CRITIC-method,and entropy-based *** main findings(output results)confirmed that the optimal option for the case study was hybrid PV-DG-B with the following specification:5 kW DG,RO-500,and load following control *** this condition,the annual operating cost and initial costs were$5546 and$161022,respectively,whereas the cost of energy was 0.077$/*** excess energy and unmet loads were 40998 and 2371 kWh,*** breakeven grid extension distance and the amount of CO_(2) were 3.31 km and 5171 kg per year,*** with DG only,the amount of CO_(2) has been sharply reduced by 113939 kg per year.

关键词： al-Minya city(Egypt) energy efficiency multi-criteria decision-making optimization renewable energy reverse osmosis units

Modeling and Optimization of Surface Roughness of Epoxy/Nanoparticles Composite Coating

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Computers, Materials & Continua 2022年第4期71卷 71-83页

作者： A.F.Mohamed J.Abu alsoud mujahed al-dhaifallah Hegazy Rezk Mohamed K.Hassan Department of Mechanical Engineering College of Engineering&Islamic Arch.Umm Alqura UniversityMakkahSaudi Arabia Department of Mechanical Engineering Faculty of EngineeringSohag UniversitySohagEgypt Department of Systems Engineering King Fahd University of Petroleum&MineralsDhahran31261KSA College of Engineering at Wadi Addawaser Prince Sattam Bin Abdulaziz UniversityAl-Kharj11911Saudi Arabia Department of Electrical Engineering Faculty of EngineeringMinia UniversityMinia61517Egypt Department of Production Engineering and Design Faculty of EngineeringMinia UniversityMinia61517Egypt

In power plants,flue gases can cause severe corrosion damage in metallic parts such as flue ducts,heat exchangers,and *** is an effective technique to prevent this damage.A robust fuzzy model of the surface roughness(Ra and Rz)of flue gas ducts coated by protective composite coating from epoxy and nanoparticles was constructed based on the experimental *** proposed model consists of four nanoparticles(ZnO,ZrO2,SiO2,and NiO)with 2%,4%,6%,and 8%,*** surface methodology(RSM)was used to optimize the process parameters and identify the optimal conditions for minimum surface roughness of this coated *** prove the superiority of the proposed fuzzy model,the model results were compared with those obtained by ANOVA,with the coefficient of determination and the root-mean-square error(RMSE)used as *** Ra,for the first output response,using ANOVA,the coefficient-of-determination values were 0.9137 and 0.4037,respectively,for training and ***,for Rz,the second output response,the coefficient-of-determination results were 0.9695 and 0.4037,respectively,for training and *** the fuzzy modeling of Ra,for the first output response,the RMSE values were 0.0 and 0.1455,respectively,for training and *** values for the coefficient of determination were 1.00 and 0.9807,respectively,for training and *** results prove the superiority of fuzzy *** modeling the second output response Rz,the RMSE values were 0.0 and 0.0421,respectively,for training and testing,and the coefficient-of-determination values were 1.00 and 0.9959,respectively,for training and testing.

关键词： Materials coating nanoparticles modeling and optimization

A Scalable Interconnection Scheme in Many-Core Systems

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Computers, Materials & Continua 2023年第10期77卷 615-632页

作者： allam Abumwais mujahed Eleyat Computer Systems Engineering Arab American UniversityJenin240Palestine

Recent architectures of multi-core systems may have a relatively large number of cores that typically ranges from tens to hundreds;therefore called many-core *** systems require an efficient interconnection network that tries to address two major ***,the overhead of power and area cost and its effect on ***,high access latency is caused by multiple cores’simultaneous accesses of the same shared *** paper presents an interconnection scheme called N-conjugate Shuffle Clusters(NCSC)based on multi-core multicluster architecture to reduce the overhead of the just mentioned *** eliminated the need for router devices and their complexity and hence reduced the power and area *** also resigned and distributed the shared caches across the interconnection network to increase the ability for simultaneous access and hence reduce the access *** intra-cluster communication,Multi-port Content Addressable Memory(MPCAM)is *** experimental results using four clusters and four cores each indicated that the average access latency for a write process is 1.14785±0.04532 ns which is nearly equal to the latency of a write operation in ***,it was demonstrated that the average read latency within a cluster is 1.26226±0.090591 ns and around 1.92738±0.139588 ns for read access between cores from different clusters.

关键词： Many-core multi-core N-conjugate shuffle multi-port content addressable memory interconnection network

Dual-Port Content Addressable Memory for Cache Memory Applications

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Computers, Materials & Continua 2022年第3期70卷 4583-4597页

作者： allam Abumwais Adil Amirjanov Kaan Uyar mujahed Eleyat Department of Computer Engineering Near East UniversityNicosiaN.Cyprus via Mersin-10Turkey Computer Systems Engineering Arab American UniversityJenin240Palestine

Multicore systems oftentimes use multiple levels of cache to bridge the gap between processor and memory *** paper presents a new design of a dedicated pipeline cache memory for multicore processors called dual port content addressable memory(DPCAM).In addition,it proposes a new replacement algorithm based on hardware which is called a near-far access replacement algorithm(NFRA)to reduce the cost overhead of the cache controller and improve the cache access *** experimental results indicated that the latency for write and read operations are significantly less in comparison with a set-associative cache ***,it was shown that a latency of a read operation is nearly constant regardless of the size of ***,an estimation of the power dissipation showed that DPCAM consumes about 7%greater than a set-associative cache memory of the same *** results encourage for embedding DPCAM within the multicore processors as a small shared cache memory.

关键词： Multicore system content addressable memory dual port CAM cache controller set-associative cache power dissipation

A New Metaheuristic Optimization algorithms for Brushless Direct Current Wheel Motor Design Problem

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Computers, Materials & Continua 2021年第5期67卷 2227-2242页

作者： M.Premkumar R.Sowmya Pradeep Jangir Kottakkaran Sooppy Nisar mujahed aldhaifallah Department of Electrical and Electronics Engineering GMR Institute of TechnologyRajam532127India Department of Electrical and Electronics Engineering National Institute of TechnologyTiruchirappalli620015India Rajasthan Rajya Vidyut Prasaran Nigam Sikar305001India Department of Mathematics College of Arts and SciencesPrince Sattam bin Abdulaziz UniversityWadi Aldawaser11991Saudi Arabia Systems Engineering Department King Fahd University of Petroleum&MineralsDhahranSaudi Arabia

The Equilibrium Optimizer(EO),Grey Wolf Optimizer(GWO),and Whale Optimizer(WO)algorithms are being recently developed for engineering optimization *** this paper,the EO,GWO,and WO algorithms are applied individually for a brushless direct current(BLDC)design optimization *** EO algorithm is inspired by the models utilized to find the system’s dynamic state and equilibrium *** GWO and WO algorithms are inspired by the hunting behavior of the wolf and the whale,*** primary purpose of any optimization technique is to find the optimal configuration by maximizing motor efficiency and/or minimizing the total ***,two objective functions are being used to achieve these *** first refers to a design with high power output and *** second is a constraint imposed by the reality that the motor is built into the wheel of the vehicle and,therefore,a lightweight is *** EO,GWO,and WOA algorithms are then utilized to optimize the BLDC motor’s design variables to minimize the motor’s total mass or maximize the motor efficiency by simultaneously satisfying the six inequality *** simulation is carried out using MATLAB simulation software,and the simulation results prove the dominance of the proposed *** paper also suggests an efficient method from the proposed three methods for the BLDC motor design optimization problem.

关键词： BLDC motor constrained equilibrium optimizer singleobjective optimization

Antibody fragment V_(H)ab6:universal neutralizer for SARS-CoV-2 variants

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Journal of Bio-X Research 2023年第2期6卷 73-77页

作者： mujahed I.Mustafa Abdelrafie M.Makhawi Department of Biotechnology College of Applied and Industrial SciencesUniversity of BahriKhartoumSudan

The recent coronavirus disease 2019(COVID-19)outbreak has highlighted the inadequacy of our ability to respond to newly emerging *** medications are the most effective means of combating the pandemic,yet their diminishing efficacy and a large population of unvaccinated individuals will create a fertile environment for the virus’s propagation and the emergence of novel variants,posing an ongoing risk of infection for vulnerable populations with compromised immune *** treat those infected,effective treatments must be *** this review,we discuss a breakthrough in engineered antibody fragments that could provide a protective barrier against the onslaught of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)variants as well as future other viral infections.

关键词： COVID-19 omicron variants SARS-CoV-2 variants of concern V_(H)ab6