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A Virtual energy Storage System for Voltage Control of Distribution Networks

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CSEE Journal of Power and energy Systems 2018年第2期4卷 146-154页

作者： saif Sabah Sami Student member Meng Cheng Jianzhong Wu Nick Jenkins Institute of energy School of EngineeringCardiff UniversityCardiff CF243AAUK

Increasing amounts of distributed generation(DG)connected to distribution networks may lead to the violation of voltage and thermal *** paper proposes a virtual energy storage system(VESS)to provide voltage control in distribution networks in order to accommodate more DG.A VESS control scheme coordinating the demand response and the energy storage system was *** demand response control measures the voltage of the connected bus and changes the power consumption of the demand to eliminate voltage *** response of energy storage systems was used to compensate for the uncertainty of demand *** voltage control of the energy storage system is a droop control with droop gain values determined by applying voltage sensitivity *** control strategy of the VESS was applied to a medium-voltage network and the results show that the control of the VESS not only facilitates the accommodation of higher DG capacity in the distribution network without voltage violations or network reinforcements but also prolongs the lifetime of the transformer’s on-load tap changer.

关键词： Demand response distributed generation distribution network energy storage system voltage control virtual energy storage system

Performance Analysis of Magnetic Nanoparticles during Targeted Drug Delivery:Application of OHAM

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Computer Modeling in Engineering & Sciences 2022年第2期130卷 723-749页

作者： Muhammad Zafar Muhammad saif Ullah Tareq Manzoor Muddassir Ali Kashif Nazar Shaukat Iqbal HabibUllah Manzoor Rizwan Haider Woo Young Kim Institute of energy and Environmental Engineering University of the PunjabQuaid-e-Azam CampusLahore54590Pakistan energy Research Centre COMSATS University IslamabadLahore54000Pakistan Department of energy Engineering Faculty of Mechanical and Aeronautical EngineeringUniversity of Engineering and TechnologyTaxila47080Pakistan Department of Mathematics COMSATS University IslamabadLahore54000Pakistan School of Systems and Technology University of Management Sciences and TechnologyLahore54770Pakistan Department of Electrical Electronics and TelecommunicationEngineeringUniversity of Engineering and TechnologyLahore(FSD Campus)Faisalabad38000Pakistan Department of Electronic Engineering Faculty of Applied Energy SystemJeju National UniversityJeju Special Self-Governing ProvinceJeju-si63243Korea

In recent years,the emergence of nanotechnology experienced incredible development in the field of medical *** the past decade,investigating the characteristics of nanoparticles during fluid flow has been one of the intriguing *** distribution and uniformity have emerged as substantial criteria in both medical and engineering *** effects of chemotherapy on healthy tissues are known to be a significant concern during cancer therapy.A novel treatment method of magnetic drug targeting(MDT)has emerged as a promising topical cancer treatment along with some attractive advantages of improving efficacy,fewer side effects,and reduce drug *** magnetic drug targeting,the appropriate movement of nanoparticles(magnetic)as carriers is essential for the therapeutic process in the blood clot removal,infection treatment,and tumor cell *** this study,we have numerically investigated the behavior of an unsteady blood flowinfused with magnetic nanoparticles during MDT under the influence of a uniform external magnetic field in a *** optimal homotopy asymptotic method(OHAM)is employed to compute the governing equation for unsteady electromagnetohydrodynamics *** influence of Hartmann number(Ha),particle mass parameter(G),particle concentration parameter(R),and electro-osmotic parameter(k)is investigated on the velocity of magnetic nanoparticles and blood *** obtained show that the electro-osmotic parameter,along with Hartmann’s number,dramatically affects the velocity of magnetic nanoparticles,blood flow velocity,and flow ***,results also reveal that at a higher Hartman number,homogeneity in nanoparticles distribution improved *** particle concentration andmass parameters effectively influence the capturing effect on nanoparticles in the blood flow using a micro-tube for magnetic drug ***,investigation also indicates that the OHAM analysis is efficient and quick to h

关键词： Hartmann number magnetic nanoparticles nonlinear analysis targeted drug delivery optimal homotopy asymptotic method(OHAM)

Sustainability and virtual water:The lessons of history

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Geography and Sustainability 2022年第4期3卷 358-365页

作者： Majid Labbaf Khaneiki Abdullah saif Al-Ghafri Björn Klöve Ali Torabi Haghighi UNESCO Chair on Aflaj Studies and Archaeo-Hydrology University of NizwaNizwaOman Water Energy and Environmental Engineering UnitFaculty of TechnologyUniversity of OuluOuluFinland

This article aims to show that virtual water has historically been an adaptation strategy that enabled some arid regions to develop a prosperous economy without putting pressure on their scarce water *** water is referred to as the total amount of water that is consumed to produce goods and *** an example,in arid central Iran,the deficiency in agricultural revenues was offset by more investment in local industries that enjoyed a perennial capacity to employ more *** revenues of local industries weaned the population from irrigated agriculture,since most of their raw materials and also food stuff were imported from other regions,bringing a remarkable amount of virtual *** virtual water not only sustained the region’s inhabitants,but also set the stage for a powerful polity in the face of a rapid population growth between the 13th and 15th centuries *** resultant surplus products entailed a vast and safe network of roads,provided by both entrepreneurs and ***,it became possible to import more feedstock such as cocoons from water-abundant regions and then export silk textiles with considerable *** article concludes that a similar model of virtual water can remedy the ongoing water crisis in central Iran,where groundwater reserves are overexploited,and many rural and urban centers are teetering on the edge of socio-ecological *** holds an urgent lesson on sustainability for our today’s policy that stubbornly peruses agriculture and other high-water-demand sectors in an arid region whose development has always been dependent on virtual water.

关键词： Proto-industrialization Water scarcity Non-hydraulic polity Virtual water Political economy

Band Gap Determination from Diffuse Reflectance Measurements of Irradiated Lead Borate Glass System Doped with TiO<sub>2</sub>by Using Diffuse Reflectance Technique

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Materials Sciences and Applications 2013年第5期4卷 324-329页

作者： saif Ebraheem Antar El-Saied National Center for Radiation Research and Technology Atomic Energy Authority Cairo Egypt

Ultraviolet-visible UV-Vis diffuse reflectance measurements of irradiated lithium tetra-borate glass have been acquired using. Evolution 600 Spectrophotometer equipped with praying Mantis Diffuse Reflectance Accessory DRA base upon the onset of the diffuse reflectance spectra of the powdered or bulk materials. Also the absorption edge and band gap energies of the prepared glass were determined. The optical energy gap is calculated and found to be (3.0 - 3.5) eV. Which is in close agreement to the one calculated for r = 1/2, i.e. the transition mechanism, is accordingly direct allowed transition. The density increases from 3.1 to 3.9 gm/cm3 for the undoped and doped glass.

关键词： Diffuse Reflectance Accessory Optical Gap Borate-Lead-Titanium-Glasses Gamma Radiation

Experimental investigation of thermal performance characteristics of sintered copper wicked and grooved heat pipes:A comparative study

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Journal of Central South University 2021年第11期28卷 3507-3520页

作者： saif Ullah KHALID Hafiz Muhammad ALI Muhammad Ali NASIR Riffat Asim PASHA ZAFAR SAID L.Syam SUNDAR Ahmed Kadhim HUSSEIN Mechanical Engineering Department University of Engineering and TechnologyTaxila 47050Pakistan Mechanical Engineering Department King Fahd University of Petroleum&Minerals(KFUPM)Dhahran 31261Saudi Arabia Interdisciplinary Research Center for Renewable energy and Power Systems(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Sustainable and Renewable energy Engineering Department College of EngineeringUniversity of SharjahSharjah 27272United Arab Emirates Centre for Mechanical Technology and Automation(TEMA-UA) Department of Mechanical EngineeringUniversity of AveiroAveiro 3810-131Portugal Mechanical Engineering Department College of EngineeringUniversity of BabylonBabylon CityHillaIraq

Heat pipes are most frequently used for thermal management *** of right type of heat pipe for a specific scenario is utmost necessary for best *** purpose of this research is comparison of thermal performance characteristics of sintered copper wicked and grooved heat pipes,which are mostly used types of heat *** water filled heat pipes were tested through experimentation in gravity assisted *** outcomes have been compiled in terms of capillary pressure,operating temperature,thermal resistance and heat transfer *** pressure is high in sintered heat pipes compared to grooved heat pipes irrespective of groove *** heat pipes have lower operating temperature compared to sintered heat pipes at the same heat *** 8 W,compared to sintered heat pipes,grooved heat pipes have 8.24% lower condenser surface temperature,4.41% lower evaporator surface temperature and 7.79% lower saturation *** resistance of sintered heat pipe is much lower than grooved heat *** maximum relative difference of 63.8% was observed at 8 *** transfer coefficient of sintered heat pipe was observed double compared to grooved heat pipe at 8 W heat *** resistance and hence heat transfer coefficient of sintered heat pipe change almost in a linear manner with respect to heat load but unexpectedly turning point is observed in thermal resistance and heat transfer coefficient of grooved heat *** heat pipes attain equilibrium much earlier compared to sintered *** heat loads from 4 to 20 W causes variation in equilibrium establishment time from 7 to 4 min for grooved and from 10 to 7 min for sintered heat pipes.

关键词： heat pipe thermal resistance heat transfer coefficient thermal performance capillary pressure

A Heuristics-Based Cost Model for Scientic Workow Scheduling in Clou

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Computers, Materials & Continua 2021年第6期 3265-3282页

作者： Ehab Nabiel Al-Khanak Sai Peck Lee saif Ur Rehman Khan Navid Behboodian Osamah Ibrahim Khalaf Alexander Verbraeck Hans van Lint Department of Transport and Planning Faculty of Civil Engineering and Geosciences(CiTG)Delft University of TechnologyDelftNetherlands Faculty of Computer Science and Information Technology University of MalayaKuala LumpurMalaysia Department of Computer Science COMSATS University Islamabad(CUI)IslamabadPakistan Faculty of Computing and Digital Technology HELP UniversityKuala LumpurMalaysia Al-Nahrain Nanorenewable energy Research Centre Al-Nahrain UniversityBaghdadIraq Department Multi-Actor Systems Faculty of TechnologyPolicy and Management(TPM)Delft University of TechnologyDelftNetherlands

Scientic Workow Applications(SWFAs)can deliver collaborative tools useful to researchers in executing large and complex scientic ***,Scientic Workow Scheduling(SWFS)accelerates the computational procedures between the available computational resources and the dependent workow jobs based on the researchers’***,cost optimization is one of the SWFS challenges in handling massive and complicated tasks and requires determining an approximate(near-optimal)solution within polynomial computational *** by this,current work proposes a novel SWFS cost optimization model effective in solving this *** proposed model contains three main stages:(i)scientic workow application,(ii)targeted computational environment,and(iii)cost optimization *** model has been used to optimize completion time(makespan)and overall computational cost of SWFS in cloud computing for all considered scenarios in this research *** will ultimately reduce the cost for service *** the same time,reducing the cost has a positive impact on the protability of service providers towards utilizing all computational resources to achieve a competitive advantage over other cloud service *** evaluate the effectiveness of this proposed model,an empirical comparison was conducted by employing three core types of heuristic approaches,including Single-based(i.e.,Genetic Algorithm(GA),Particle Swarm Optimization(PSO),and Invasive Weed Optimization(IWO)),Hybrid-based(i.e.,Hybrid-based Heuristics Algorithms(HIWO)),and Hyper-based(i.e.,Dynamic Hyper-Heuristic Algorithm(DHHA)).Additionally,a simulation-based implementation was used for SIPHT SWFA by considering three different sizes of *** proposed model provides an efcient platform to optimally schedule workow tasks by handing data-intensiveness and computational-intensiveness of *** results reveal that the proposed cost optimization model attained an optimal Job completio

关键词： Scientic workow scheduling empirical comparison cost optimization model heuristic approach cloud computing