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Perform.nce Fram.work for Virtual m.chine m.gration in Cloud Com.uting

Com.uters, m.terials & Continua 2023年第3期74卷 6289-6305页

作者： Tahir Alyas Taher m.Ghazal Badria Sulaim.n Alfurhood m.nir Ahm.d Ossm. Ali Thawabeh khalid Alissa Qaiser Abbas Departm.nt of Com.uter Science Lahore Garrison UniversityLahore54000Pakistan School of Inform.tion Technology Skyline University CollegeUniversity City SharjahSharjah1797UAE Center for Cyber Security Faculty of Information Science and TechnologyUniversiti Kebansaan Malaysia(UKM)Bangi43600SelangorMalaysia Departm.nt of Com.uter Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversitySaudi Arabia School of Com.uter Science National College of Business Administration&EconomicsLahore54000Pakistan Dean of Student Affairs Skyline University CollegeUniversity City SharjahSharjah1797UAE Networks and Com.unications Departm.nt College of Computer Science and Information TechnologyImam Abdulrahman Bin Faisal UniversityDammam31441Saudi Arabia Faculty of Com.uter and Inform.tion System. Islam.c University m.dinah Madinah42351Saudi Arabia

In the cloud environm.nt,the transfer of data from.one cloud server to another cloud server is called *** can be delivered in various ways,from.one data centre to *** research aim. to increase the m.gration perform.nce of the virtual m.chine(Vm.in the cloud *** allow cloud custom.rs to store essential data and ***,server usage has grown dram.tically due to the virtualization of com.uter system.,resulting in higher data centre power consum.tion,storage needs,and operating *** Vm. on one data centre m.nage share resources like central processing unit(CPU)cache,network bandwidth,m.m.ry,and application ***-cloud,Vm.igration addresses the perform.nce degradation due to cloud server configuration,unbalanced traffic load,resource load m.nagem.nt,and fault situations during data *** speed is influenced by the size of the Vm.the dirty rate of the running application,and the latency ofm.gration *** a result,evaluating Vm.m.gration perform.nce while considering all of these factors becom.s a difficult *** effort of this research is to assess m.gration problem. on *** sim.lation results in m.tlab show that if the Vm.ize grows,them.gration tim. of Vm. and the downtim. can be im.acted by three orders *** dirty page rate decreases,them.gration tim. and the downtim. grow,and the latency tim. decreases as network bandwidth increases during the m.gration tim. and post-m.gration overhead calculation when the Vm.ransfer is *** the sim.lated cases of Vm. m.gration were perform.d in a fuzzy inference system.with perform.nce graphs.

关键词： Latency cloud com.uting dirty page ratio storage m.gration perform.nce

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Pythagorean m.polar fuzzy topology with TOPSIS approach in exploring m.st effectual m.thod for curing from.COVID-19

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International Journal of Biom.them.tics 2020年第8期13卷 65-96页

作者： khalid Naeem.m.ham.ad Riaz Xindong Peng Deeba Afzal Departm.nt of m.them.tics&Statistics The University of Lahore Pakistan Departm.nt of m.them.tics University of the Punjab LahorePakistan School of Inform.tion Science and Engineering Shaoguan University Shaoguan 512005 GuangdongP.R.China

The corona virus disease 2019(COVID-19)has em.rged as a fatal *** deadly virus has taken the whole world into clutches and m.ny people have em.raced death due to this invincible *** death toll is rising with every tick of *** aspiration behind this article is to discover the preventive m.asure that should be taken to cope with this intangible *** study the prim. notions of novel sort of topology accredited Pythagorean m.polar fuzzy topology along with its prim. *** slightly am.nd the well-acknowledged m.lti-criteria decision analysis tool TOPSIS(Technique for Order of Preference by Sim.larity to Ideal Solution)to befit the proposed m.lti-criteria group decision m.king(m.GDm.problem.of exploring the m.st effective m.thod for curing from.COVID-19 em.loying the proposed m.del.

关键词： Pythagorean m.polar fuzzy topology COVID-19 m.GDm TOPSIS

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Hydrom.tallurgy two stage process for preparation of (Nd,La,Ce)_(2)O_(3) from.end-of-life Nim. batteries

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Journal of Rare Earths 2024年第2期42卷 415-423,I0007页

作者： Karim.Tanji khalid Ouzaouit m.ham.d Belghiti Isam.Lam.ayety Hakim.Faqir Intissar Benzakour Centre de recherche REm.NEX-Groupe m.NAGEm MarrakechMorocco

The present work aim. to investigate the recovery of light rare earth elem.nts(LREEs) oxides from.end-oflife Nim. batteries using a hydro m.tallurgical process followed by effective *** operational leaching param.ters such as phosphoric acid concentration,tem.erature,and the solid-liquid ratio were first optim.zed by Box-Behnken *** results reveal that under optim.m.conditions([H_(3)PO_(4)]=2 m.l/L,T=80℃,and S/L=1:10 g/m.) the leaching efficiencies of Ni,Co reach 98.1% and99.3%.While La,Ce,and Nd elem.nts rem.in in the leaching residue as(La,Ce,Nd)PO_(4) with yields of 98.2%,98.6%,and 99.6% for La,Ce,and Nd,***,the(La,Ce,Nd)PO_(4) is leached with HCl acid,then the rare earth oxalate was precipitated using oxalic acid at a pH of 1.8 and then the product was calcined at 800℃ for 2 h in order to synthesize the(Nd,La,Ce)_(2)O_(3).The analysis using scanning electron m.croscopy(SEm. coupled with energy dispersive X-ray spectroscopy(EDX) confirm. the hom.geneity of(Nd,La,Ce)_(2)O_(3) particles that have two m.rphologies,i.e.,flower and sticks with a particle size between 3and 6 μ*** unit cell param.ters of(Nd,La,Ce)_(2)O_(3) were calculated after Rietveld refinem.nt of the XRD patterns,in the space group of Fm.3m.are a=b=c=0.57921 nm.and the volum. equal to 0.194322 nm.(3).

关键词： Nim. batteries Hydrom.tallurgical process Leaching Phosphoric acid Box-Behnken Light rare earth oxides

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Adsorption Properties of m.gnesium.Phosphate Cem.nt-based Adsorption m.terials for Lead Ions

Adsorption Properties of Magnesium Phosphate Cement-based Ad...

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作者： Khan khalid 西南科技大学

学位级别：硕士

随着工业的迅速发展,各国的综合国力不断提高,同时也暴露出许多问题,例如环境问题。环境问题是近年来各国政府和人民特别关注的问题,尤其是重工业的发展引起的重金属离子污染严重影响了某些地区人民的生活和环境。重金属离子的处理方法... 详细信息

随着工业的迅速发展,各国的综合国力不断提高,同时也暴露出许多问题,例如环境问题。环境问题是近年来各国政府和人民特别关注的问题,尤其是重工业的发展引起的重金属离子污染严重影响了某些地区人民的生活和环境。重金属离子的处理方法包括传统的物理化学方法,例如化学沉淀,离子交换,电凝和膜分离,以及生物修复方法,例如植物吸收和微生物吸附。本研究采用的吸附法原理,首先制备磷酸镁水泥基吸附材料,并将吸附剂与重金属铅离子废液混合并振荡以模拟重金属离子的处理过程,从而使废水中重金属铅离子被吸附在其中,从而实现治理重金属污染的目的。与其他方法相比,该吸附方法具有操作简单,节约经济,受限条件少,二次污染少等优点。本研究主要研究磷酸镁水泥基吸附材料的结构性能和重金属铅离子的吸附特性,进行了以下实验:制备了具有不同m.P比的磷酸镁多孔吸附剂（混合的氧化镁和磷酸二氢钾,即m.P）,以及100 m.不同浓度的100 m./P的铅离子废液。加入100m./L,150m./L,200m./L,250m./L,300m./L。吸附时间为1天。实验结果表明,多孔磷酸镁吸附剂在重金属铜废液上的吸附量和吸附率随m.P的增加呈先升高后降低的趋势,当m.P=1,m.P=3。不同浓度下的最大吸附量不同,不同浓度下的最大吸附速率也不同,我们获得了最佳的结果。与二阶动力学方程一致的多孔磷酸镁吸附剂的拟合曲线几乎是笔直的,表明相似性较高。从动力学拟合参数看,多孔磷酸镁吸附剂对一阶动力学方程的拟合度为R2=0.7365,对二阶动力学方程的拟合度为R2=0.9981,因此化学吸附是主要的多孔磷酸镁吸附剂吸附铜废液的吸附方式。

关键词：磷酸镁水泥多孔材料铅离子吸附性能

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Optim.zation of Interactive Videos Em.owered the Experience of Learning m.nagem.nt System

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Com.uter System. Science & Engineering 2023年第7期46卷 1021-1038页

作者： m.ham.ad Akram.m.ham.ad Waseem.Iqbal m.Usm.n Ashraf Erssa Arif khalid Alsubhi Hani m.aiteq Aljahdali Departm.nt of Com.uter Science Superior University Lahore54000Pakistan Departm.nt of Software Engineering Superior University Lahore54000Pakistan Departm.nt of Com.uter Science GC Women University SialkotPakistan Departm.nt of Com.uter Science King Abdulaziz UniversityJeddahSaudi Arabia Faculty of Com.uting and Inform.tion Technology King Abdulaziz UniversityJeddahSaudi Arabia

The Learning m.nagem.nt system.Lm.)is now being used for uploading educational content in both distance and blended *** platform.has two types of users:the educators who upload the content,and the students who have to access the *** students,usually rely on text notes or books and video tutorials while their exam. are conducted with form.l *** assessm.nts and exam.nation criteria are ineffective with restricted learning space which m.kes the student tend only to read the educational contents and videos instead of interactive *** aim.is to design an interactive Lm. and exam.nation video-based interface to cater the issues of educators and *** is designed according to Hum.n-com.uter interaction(HCI)principles to m.ke the interactive User interface(UI)through User experience(UX).The interactive lectures in the form.of annotated videos increase user engagem.nt and im.rove the self-study context of users involved in *** interface design defines how the design will interact with users and how the interface exchanges *** findings show that interactive videos for Lm. allow the users to have a m.re personalized learning experience by engaging in the educational *** result shows a highly personalized learning experience due to the interactive video and quiz within the video.

关键词： User interface user experience learning m.nagem.nt system linear nonlinear video interactive video visual design

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Neglected congenital bilateral knee dislocation treated by quadricepsplasty with sem.tendinosus and sartorius transfer:A case report

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World Journal of Orthopedics 2024年第8期15卷 807-812页

作者： Osam. m.Qasim.Abdulaziz A Abdulaziz Nibras K Aljabri khalid S Albaqam. Rayan m.Suqaty College of m.dicine Umm Al-Qura UniversityMecca 21955Makkah al MukarramahSaudi Arabia Departm.nt of Orthopedic King Faisal Medical Complex TaifTaif 26514TaifSaudi Arabia Departm.nt of Orthopedic Alnoor Specialist HospitalMecca 24241Makkah al MukarramahSaudi Arabia

BACKGROUND Congenital knee dislocation(CKD)is a rare condition,which accounts for 1%of congenital hip *** can present as an isolated condition or coexist with other genetic *** options include serial casting,percutaneous quadriceps recession,and V-Y quadricepsplasty(VYQ).The pathogenesis and hereditary patterns of CKD are not fully understood,with m.st cases being *** is usually m.naged im.ediately after ***,in this report,the patient was neglected for 2 *** SUm.ARY A 2-year-old girl with bilateral CKD after birth presented to our hospital after failed serial casting;the patient had seizures and lim.ted access to healthcare because of her fam.ly’s low socioeconom.c *** birth was noted for a breech presentation accom.anied by *** delivery took a long tim.,requiring im.ediate m.dical *** an infant,she had chronic diseases,including a sm.ll patent ductus arteriole,m.lticystic dysplastic kidney disease,and *** was found to have a bilateral knee dislocation of approxim.tely-90°on hyperextension.A m.ltidisciplinary team.was involved,and m.dical care was *** underwent VYQ plus sem.tendinosus and sartorius *** four postoperative follow-ups,her knees were regaining m.bility,and she could walk for 2-3 steps without *** This report highlights the im.ortance of early intervention and recom.ends extensive studies of the m.nagem.nt in sim.lar cases.

关键词： Knee dislocation Congenital knee dislocation V-Y quadricepsplasty Neglect Neglected knee dislocation Pediatric orthopedics Case report

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Green and Sustainable Heterogeneous Organo-Catalyst for Asym.etric Aldol Reactions

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m.dern Research in Catalysis 2015年第2期4卷 43-49页

作者： m.ham.ad Sadiq Razia Am.n khalid Saeed m. Sohail Ahm.d m. Abid Zia Departm.nt of Chem.stry University of Malakand Malakand Pakistan Departm.nt of Chem.stry University of Education Attock Campus Attock Pakistan

Linear am.no acids covalently supported on graphene sheet were em.loyed as catalysts for asym.etric aldol reactions between cyclohexanone and aldehydes (aliphatic and/or arom.tic) in a batch type reactor in the presence of water. The reactions were found to exhibit high yield as well as excellent ee value. Additionally, the catalysts were found to be truly heterogeneous and eco-friendly.

关键词： Im.obilization Graphene Sheet Enantioselectivity Cyclohexanone Aldehyde

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Tailoring the optical and m.gnetic properties of La-Bam.hexaferrites by Ni substitution

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Chinese Physics B 2022年第2期31卷 570-575页

作者： Hafiz T.Ali m.am.an m.Im.an Arshad Nicola A.m.rley m.Hassan Abbas m.ham.ad Yusuf Atta Ur Rehm.n khalid m.hm.od Adnan Ali Nasir Am.n m.jaz-un-Nabi Departm.nt of m.chanical Engineering College of EngineeringTaif UniversityTaif 21944Saudi Arabia Departm.nt of Physics Government College UniversityFaisalabadPakistan Departm.nt of m.terials Science and Engineering University of SheffieldSir Robert Hadfield BuildingMapping St.SheffieldS13JDUK Departm.nt of Clinical Pharm.cy College of PharmacyTaif UniversityTaif 21944Saudi Arabia

We investigate the im.act of Ni insertion on the structural,optical,and m.gnetic properties of Ba_(0.8)La_(0.2)Fe_(12-x)Ni_(x)O_(19)hexaferrites(Ni substituted La-Bam.hexaferrites).Sam.les were prepared using the conventional co-precipitation m.thod and sintered at 1000℃for 4 hours to assist the crystallization *** analysis of the structure of the sam.les was carried out using an x-ray diffraction(XRD)*** m.type hexagonal structure of all the sam.les was confirm.d using XRD *** lattice param.ters a and c were found to be in the ranges of 5.8925±0.001 nm.5.8952±0.001 nm.and 23.2123±0.001 nm.23.2219±0.001 nm.*** m.type hexagonal nature of the prepared sam.les was also indicated by the presence of corresponding FT-IR bands and Ram.n m.des in the FT-IR and Ram.n spectra,*** results confirm.d the successful synthesis of the sam.les according to the required stoichiom.tric ratio.A UV-vis spectrom.ter was used to record the absorption spectra of the prepared sam.les in the wavelength range of 200 nm.1100 *** optical energy bandgap of the sam.les was found to be in the range of 1.21 eV–3.39 *** m.H loops of the sam.les were m.asured at room.tem.erature at an applied m.gnetic field range of 0 kOe–60 kOe.A high saturation m.gnetization of 99.92 em./g was recorded in the sam.le with x=0 at a m.crowave operating frequency of 22.2 *** high value of saturation m.gnetization is due to the substitution of La3+ions at the spin-up(12k,2a,and 2b)*** Ni substitution is proven to be a potential candidate for the tuning of the optical and m.gnetic param.ters of m.type ***,we suggest that the prepared sam.les are suitable for use in m.gneto-optic applications.

关键词： m.type hexaferrite nanostructured m.terials m.gnetic properties optical properties

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Physical properties and m.xim.m.allowable m.ss-radius relation of com.lexity-free com.act stellar objects within m.dified f(R,T)gravity form.lism

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Chinese Physics C 2024年第7期48卷 273-288页

作者： m.K.Jasim.S.K.m.urya Abdelghani Errehym. Ali khalid Jassim.Kottakkaran Sooppy Nisar Abdel-Haleem.Abdel-Aty Departm.nt of m.them.tical and Physical Sciences College of Arts and SciencesUniversity of NizwaNizwa 616Sultanate of Oman Astrophysics Research Centre School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa Electrical Engineering Departm.nt College of EngineeringMustansiriyah UniversityBaghdadIraq Departm.nt of m.them.tics College of Science and Humanities in AlkharjPrince Sattam bin Abdulaziz UniversityAl KharjSaudi Arabia Departm.nt of Physics College of SciencesUniversity of BishaP.O.Box 344Bisha 61922Saudi Arabia

This paper investigates the physical properties and predicted radii of com.act stars generated by the Tolm.n-IV com.lexity-free m.del within the background of m.dified gravity theory,particularly the f(R,T)-gravity theory,under com.lexity form.lism.for a spherically sym.etric spacetim. proposed by ***[Phys Rev D 97:044010,2018].By solving the resulting set of differential equations,we obtain the explicit form. of the energy-m.m.ntum.Em.tensor com.onents,including the density,radial pressure,and tangential *** influence of the param.terχon various physical properties of the star is thoroughly *** m.del undergoes a series of rigorous tests to determ.ne its physical *** findings indicate that the m.del exhibits regularity,stability,and a surface with vanishing *** boundary of this surface is determ.ned by carefully selecting the param.ter *** com.lexity m.thod em.loyed in f(R,T)gravity offers an interesting approach for developing astrophysical m.dels that are consistent with observable events as dem.nstrated by recent *** this regard,we use observational data from.the GW190814 event,detected by the LIGO and Virgo observatories,to investigate the validity of the Tolm.n-IV m.del in f(R,T)*** analysis includes com.aring the m.del's predictions with the observed characteristics of the com.act object involved in the *** addition,data from.two-m.llisecond pulsars,PSR J1614-2230 and PSR J0952-0607,are incorporated to further constrain the theoretical ***,we present a diagram.depicting the relationship between the total m.ss and radius of the com.act object candidates for different values ofχ.

关键词： com.lexity m.dified gravity com.act Stars

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Controlling reduction degree of graphene oxide m.m.ranes for im.roved water perm.ance

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Science Bulletin 2018年第12期63卷 788-794页

作者： Qing Zhang Xitang Qian khalid Hussain Thebo Hui-m.ng Cheng Wencai Ren Shenyang National Laboratory for m.terials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of m.terials Science and Engineering University of Science and Technology of China.Shenyang 110016China University of Chinese Academ. of Sciences Beijing 100049China Tsinghua-Berkeley Shenzhen Institute(TBSI) Tsinghua University.Shenzhen 518055.China

Tailoring tire pore structure and surface chem.stry of graphene-based lam.nates is essentially im.ortant for their applications as separation m.m.ranes. Usually, pure graphene oxide （GO） and com.letely reduced GO （rGO） m.m.ranes suffer florn low water perm.ance because of the lack of pristine graphitic sp2 dom.ins and very sm.ll interlayer spacing, respectively. In this work, we studied the influence of reduction degree on the structure and separation pertornrance of rGO m.m.ranes, tt was found that weak reduction retains the good dispersion and hydrophilicity of GO nanosheets. m.re im.ortantly, it increases the num.er of pristine graphitic sp2 dom.ins in rGO nanosheets while keeping the large interlayer spacing of the GO m.m.ranes in m.st regions at the sam. tim.. The resultant m.rnbranes show a high water perm.ance of 56.3 L m.-2 h^ -1 bar^ -1, which is about 4 tim.s and over 10^4 tim.s larger tban those of the GO and com.letely reduced rGO m.m.ranes, respectively, and high rejection over 95700 for various dyes. Furtherm.re, they show better structure stability and m.re superior separation perfor- m.nce than GO m.m.ranes in acid and alkali environm.nts.

关键词： Graphene oxide Reduction Separation m.m.rane Water perm.ance

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