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Interval Type-2 fuzzy position control of electro-hydraulic actuated robotic excavator

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International Journal of Mining Science and Technology 2012年第3期22卷 437-445页

作者： Hassan mohammed Yousif Kothapalli Ganesh Edith Cowan University Joondalup 6027 Australia

This paper deals with fuzzy intelligent position control of electro-hydraulic activated robotic excavator for the control of boom, arm and bucket axes. Intelligent control systems are required to overcome unde- sirable stick-slip motion, limit cycles and oscillations. Models of electro-hydraulic servo controlled front end loader excavators are highly nonlinear. The nonlinear model accounts for fluid flow rate of valve, pump hydraulics, and friction forces. The friction forces are modelled by Coulomb, viscous and Stribeck function. Interval Type-2 Fuzzy Logic Controller （IT2FLC） is used to study the time-domain position responses of axes in the presence of external applied load. It has the ability to control the position of each of the three axes with minimum actuator position errors. Models presented are accurate and study the dynamics of the actuator and load. To improve the transient behaviour of the robotic excavator, we elim- inated iitter of the bucket movement in the presence of nonlinearities.

关键词： ExcavatorFuzzy controlMiningRobotType-2

On linearization method to MHD boundary layer convective heat transfer with low pressure gradient

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Propulsion and Power Research 2015年第2期4卷 105-113页

作者： mohammed A.mohammed Ahmed mohammed E.mohammed Ahmed A.Khidir Faculty of Technology of Mathematical Sciences and Statistics Alneelain UniversityKhartoumP.O.Box 12702Sudan

The paper highlights the application of a recent semi-numerical successive linearization method(SLM)in solving highly coupled,nonlinear boundary value *** method is presented in detail by solving the problem of boundary layer convective heat transfer with low pressure gradient in the presence of viscous dissipation and radiation *** effects of the parameters on the flow are *** velocity,temperature,skinfriction,and heat transfer coefficients have been obtained and discussed for various physical parametric values.

关键词： Successive linearization method Magnetohydrodynamics(MHD) Boundary layer convective heat transfer Pressure gradient Viscous dissipation

Redundant Transmission Control Algorithm for Information-Centric Vehicular IoT Networks

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Computers, Materials & Continua 2023年第8期76卷 2217-2234页

作者： Abdur Rashid Sangi Satish Anamalamudi mohammed SAlkatheiri Murali Krishna Enduri Anil Carie mohammed AAlqarni Department of Computer Science College of Science and TechnologyWenzhou-Kean UniversityWenzhou325060China Department of Computer Science Engineering SRM University APAmaravati522502India Department of Cybersecurity College of Computer Science&EngineeringUniversity of JeddahJeddahSaudi Arabia Department of Software Engineering College of Computer Science&EngineeringUniversity of JeddahJeddahSaudi Arabia

Vehicular Adhoc Networks(VANETs)enable vehicles to act as mobile nodes that can fetch,share,and disseminate information about vehicle safety,emergency events,warning messages,and passenger ***,the continuous dissemination of information fromvehicles and their one-hop neighbor nodes,Road Side Units(RSUs),and VANET infrastructures can lead to performance degradation of VANETs in the existing hostcentric IP-based ***,Information Centric Networks(ICN)are being explored as an alternative architecture for vehicular communication to achieve robust content distribution in highly mobile,dynamic,and errorprone *** ICN-based Vehicular-IoT networks,consumer mobility is implicitly supported,but producer mobility may result in redundant data transmission and caching inefficiency at intermediate vehicular *** paper proposes an efficient redundant transmission control algorithm based on network coding to reduce data redundancy and accelerate the efficiency of information *** proposed protocol,called Network Cording Multiple Solutions Scheduling(NCMSS),is receiver-driven collaborative scheduling between requesters and information sources that uses a global parameter expectation deadline to effectively manage the transmission of encoded data packets and control the selection of information *** results for the proposed NCMSS protocol is demonstrated to analyze the performance of ICN-vehicular-IoT networks in terms of caching,data retrieval delay,and end-to-end application *** end-to-end throughput in proposed NCMSS is 22%higher(for 1024 byte data)than existing solutions whereas delay in NCMSS is reduced by 5%in comparison with existing solutions.

关键词： Caching data dissemination redundancy control ICN-vehicular IoT networks

Impact of Human Vulnerabilities on Cybersecurity

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Computer Systems Science & Engineering 2022年第3期40卷 1153-1166页

作者： Maher Alsharif Shailendra Mishra mohammed AlShehri Department of Information Technology College of Computer and Information SciencesMajmaah UniversityMajmaah11952Saudi Arabia Department of Computer Engineering College of Computer and Information SciencesMajmaah UniversityMajmaah11952Saudi Arabia

Today,security is a major challenge linked with computer network companies that cannot defend against *** vulnerable factors increase security risks and cyber-attacks,including viruses,the internet,communications,and *** of Things(IoT)devices are more effective,and the number of devices connected to the internet is constantly increasing,and governments and businesses are also using these technologies to perform business activities ***,the increasing uses of technologies also increase risks,such as password attacks,social engineering,and phishing *** play a major role in the field of *** is observed that more than 39%of security risks are related to the human factor,and 95%of successful cyber-attacks are caused by human error,with most of them being insider *** major human factor issue in cybersecurity is a lack of user awareness of cyber *** study focuses on the human factor by surveying the vulnerabilities and reducing the risk by focusing on human nature and reacting to different *** study highlighted that most of the participants are not experienced with cybersecurity threats and how to protect their personal ***,the lack of awareness of the top three vulnerabilities related to the human factor in cybersecurity,such as phishing attacks,passwords,attacks,and social engineering,are major problems that need to be addressed and reduced through proper awareness and training.

关键词： Cybersecurity phishing attack password attack social engineering cybersecurity awareness security risk

An Optimal Algorithm for Resource Allocation in D2D Communication

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Computers, Materials & Continua 2023年第4期75卷 531-546页

作者： Shahad Alyousif mohammed Dauwed Rafal Nader mohammed Hasan Ali Mustafa Musa Jabar Ahmed Alkhayyat Research Centre University of MashreqBaghdadIraq College of Engineering Department of Electrical&Electronic EngineeringGulf UniversityAlmasnadKingdom of Bahrain Medical Instrumentation Techniques Engineering Dijlah University CollegeBaghdadIraq Department of Pharmacy Al-Mustaqbal University CollegeHilla51001Iraq Computer Techniques Engineering Department Faculty of Information TechnologyImam Ja’afar Al-Sadiq UniversityNajaf10023Iraq Department of Medical Instruments Engineering Techniques Al-Turath University CollegeBaghdad10021Iraq Department of Medical Instruments Engineering Techniques Al-Farahidi UniversityBaghdad10021Iraq College of Technical Engineering The Islamic UniversityNajafIraq

The number of mobile devices accessing wireless networks isskyrocketing due to the rapid advancement of sensors and wireless communicationtechnology. In the upcoming years, it is anticipated that mobile datatraffic would rise even more. The development of a new cellular networkparadigm is being driven by the Internet of Things, smart homes, and moresophisticated applications with greater data rates and latency *** are being used up quickly due to the steady growth of smartphonedevices andmultimedia apps. Computation offloading to either several distantclouds or close mobile devices has consistently improved the performance ofmobile devices. The computation latency can also be decreased by offloadingcomputing duties to edge servers with a specific level of computing ***-to-device (D2D) collaboration can assist in processing small-scaleactivities that are time-sensitive in order to further reduce task delays. The taskoffloading performance is drastically reduced due to the variation of differentperformance capabilities of edge nodes. Therefore, this paper addressed thisproblem and proposed a new method for D2D communication. In thismethod, the time delay is reduced by enabling the edge nodes to exchangedata samples. Simulation results show that the proposed algorithm has betterperformance than traditional algorithm.

关键词： D2D communication resource allocation latency optimization

An efficient hybrid recommendation model based on collaborative filtering recommender systems

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CAAI Transactions on Intelligence Technology 2021年第4期6卷 480-492页

作者： mohammed Fadhel Aljunid Manjaiah Doddaghatta Huchaiah Department of Computer Science Mangalore UniversityMangaloreIndia

In recent years,collaborative filtering(CF)techniques have become one of the most popularly used techniques for providing personalised services to *** techniques collect users9 previous information about items such as books,music,movies,ideas,and so ***-based models are generally referred to as similarity-based CF models,which are one of the most widely agreeable approaches for providing service *** memory-based approach includes user-based CF(UCF)and item-based CF(ICF)*** UCF model recommends items by finding similar users,while the ICF model recommends items by finding similar items based on the user-item rating ***,consequent to the ingrained sparsity of the user-item rating matrix,a large number of ratings are *** results in the availability of only a few ratings to make predictions for the unknown *** result is the poor prediction quality of the CF model.A model to find the best algorithm is provided here,which gives the most accurate recommendation based on different similarity *** a hybrid recommendation model,namely rUICF,is *** rUICF model integrates the UCF and ICF models with the T linear regression model to model the sparsity and scalability issue of the user-item rating *** experimentation on two different real-world datasets shows that the proposed model demonstrates substantial performance when compared with the existing methods.

关键词： services filtering similarity

Power system voltage instability risk mitigation via emergency demand response-based whale optimization algorithm

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Protection and Control of Modern Power Systems 2019年第1期4卷 295-308页

作者： mohammed Amroune Tarek Bouktir Ismail Musirin Department of Electrical Engineering University of Ferhat Abbas Setif 119000SetifAlgeria Faculty of Electrical Engineering Universiti Teknologi MARA40450Shah AlamMalaysia

In recent years, due to the economic and environmental issues, modern power systems often operate proximately to the technical restraints enlarging the probable level of instability risks. Hence, efficient methods for voltage instability prevention are of great importance to power system companies to avoid the risk of large blackouts. In this paper, an event-driven emergency demand response (EEDR) strategy based on whale optimization algorithm (WOA) is proposed to effectively improve system voltage stability. The main objective of the proposed EEDR approach is to maintain voltage stability margin (VSM) in an acceptable range during emergency situations by driving the operating condition of the power system away from the insecure points. The optimal locations and amounts of load reductions have been determined using WOA algorithm. To test the feasibility and the efficiency of the proposed method, simulation studies are carried out on the IEEE 14-bus and real Algerian 114-bus power systems.

关键词： Voltage stability Emergency demand response Whale optimization algorithm Blackouts

Multi-output optimization of tribological characteristics control factors of thermally sprayed industrial ceramic coatings using hybrid Taguchi-grey relation analysis

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Friction 2016年第3期4卷 208-216页

作者： mohammed YUNUS Mohammad S.ALSOUFI Mechanical Engineering Department College of Engineering and Islamic Architecture Umm Al-Qura University Makkah 21514 Kingdom of Saudi Arabia

Lasma-sprayed thermal barrier coatings (TBCs) are gaining wide popularity and becoming more attractive for many industrial applications due to their high strength, thermal barrier/fatigue characteristics at elevated temperatures, resistance to chemical degradation, wear resistance, and environmental corrosion protection provided when coated on the surface of engineering components. To characterize the tribological properties of TBCs, a better understanding of their failure mechanisms and a thorough investigation of their performance are required. In this research, we used Taguchi-based grey relational analysis (GRA) to optimize the process parameters of various tribological characteristics of ceramic coatings applied via an atmospheric plasma spray process. Using Taguchi L16 factorial mixed-level experimental design, we also evaluated tribological characteristics such as wear loss and the coefficient of friction. Using GRA, we successfully performed a multiple output optimization and ranking of the control factors. Based on ANOVA results, we evaluated the significance of each process parameter and validated our findings in tests using the obtained optimum set of process parameters. Our study results will help to minimize wear loss and the coefficient of friction and to maximize TBC life.

关键词： tribological characteristics wear loss coefficient of friction hybrid Taguchi-grey relational analysis analysis of variance (ANOVA) thermal barrier coatings (TBCs)

Superconducting energy storage technology-based synthetic inertia system control to enhance frequency dynamic performance in microgrids with high renewable penetration

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Protection and Control of Modern Power Systems 2021年第1期6卷 460-472页

作者： Gaber Magdy Abualkasim Bakeer mohammed Alhasheem Electrical Engineering Department Faculty of Energy EngineeringAswan UniversityAswan81528Egypt Electrical Engineering Department Faculty of EngineeringAswan UniversityAswan81542Egypt Electrical Power Engineering and Mechatronics Department School of EngineeringTallinn University of Technology19086TallinnEstonia Department of Electrical and Control Arab Academy for ScienceTechnologyand Maritime TransportCairo2033Egypt

With high penetration of renewable energy sources(RESs)in modern power systems,system frequency becomes more prone to fluctuation as RESs do not naturally have inertial properties.A conventional energy storage system(ESS)based on a battery has been used to tackle the shortage in system inertia but has low and short-term power support during the *** address the issues,this paper proposes a new synthetic inertia control(SIC)design with a superconducting magnetic energy storage(SMES)system to mimic the necessary inertia power and damping properties in a short time and thereby regulate the microgrid(µG)frequency during *** addition,system frequency deviation is reduced by employing the proportional-integral(PI)controller with the proposed SIC *** efficacy of the proposed SIC system is validated by comparison with the conventional ESS and SMES systems without using the PI controller,under various load/renewable perturbations,nonlinearities,and *** simulation results highlight that the proposed system with SMES can efficiently manage several disturbances and high system uncertainty compared to the conventional ESS and SMES systems,without using the PI controller.

关键词： Synthetic inertia control(SIC) Load frequency control(LFC) Superconducting magnetic energy storage(SMES) Renewable energy sources(RESs) Microgrid(µG)