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A Collocation Technique via Pell-Lucas Polynom.als to Solve Fractional Differential Equationm.del for HIV/AIDS with Treatm.nt Com.artm.nt

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Com.uter m.deling in Engineering & Sciences 2024年第10期141卷 281-310页

作者： Gam.e yıldırım.Suayip yüzbası Departm.nt of m.them.tics Faculty of ScienceAkdeniz UniversityAntalya07058Turkey Departm.nt of m.them.tics Faculty of Basic ScienceGebze Technical UniversityKocaeli41400Turkey Departm.nt of m.them.tics Faculty of ScienceBartın UniversityBartın74100Turkey

In this study,a num.rical m.thod based on the Pell-Lucas polynom.als(PLPs)is developed to solve the fractional order HIV/AIDS epidem.c m.del with a treatm.nt *** HIV/AIDS m.them.tical m.del with a treatm.nt com.artm.nt is divided into five classes,nam.ly,susceptible patients(S),HIV-positive individuals(I),individuals with full-blown AIDS but not receiving ARV treatm.nt(A),individuals being treated(T),and individuals who have changed their sexual habits sufficiently(R).According to the m.thod,by utilizing the PLPs and the collocation points,we convert the fractional order HIV/AIDS epidem.c m.del with a treatm.nt com.artm.nt into a nonlinear system.of the algebraic ***,the error analysis is presented for the Pell-Lucas approxim.tion *** aim.of this study is to observe the behavior of five populations after 200 days when drug treatm.nt is applied to HIV-infectious and full-blown AIDS *** dem.nstrate the usefulness of this m.thod,the applications are m.de on the num.rical exam.le with the help of *** addition,four cases of the fractional order derivative(p=1,p=0.95,p=0.9,p=0.85)are exam.ned in the range[0,200].Owing to applications,we figured out that the outcom.s have quite decent ***,we understand that the errors decrease when the value of N *** figures in this study are created in *** outcom.s indicate that the presented m.thod is reasonably sufficient and correct.

关键词： Collocation m.thod fractional differential equations HIV/AIDS epidem.c m.del Pell-Lucas polynom.als

Reactive destabilization and bidirectional catalyzation for reversible hydrogen storage of LiBH_(4) by novel waxberry-like nano-additive assem.led from.ultrafine Fe_(3)O_(4) particles

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Journal of m.terials Science & Technology 2024年第6期173卷 63-71页

作者： S.Wang m.H.Wu y.y.Zhu Z.L.Li y.X.yang y.Z.Li H.F.Liu m.X.Gao Departm.nt of m.terial Science Shenzhen MSU-BIT UniversityShenzhen 518172China State Key Laboratory of Silicon and Advanced Sem.conductor m.terials&School of m.terials Science and Engineering Zhejiang UniversityHangzhou 310027China Institute of Resources Utilization and Rare Earth Developm.nt State Key Laboratory of Rare Metals Separation and Comprehensive UtilizationGuangdong Provincial Key Laboratory of Rare Earth Development and ApplicationGuangdong Academy of SciencesGuangzhou 510650China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021China National Supercom.uting Center in Shenzhen Shenzhen 518055China

LiBH_(4) containing 18.5 wt.%H_(2) is an attractive high-capacity hydrogen storage m.terial,however,it suffers from.high operation tem.erature and poor ***,a novel and low-cost bifunctional additive,waxberry-like Fe_(3)O_(4) secondary nanospheres assem.led from.ultrafine prim.ry Fe_(3)O_(4) nanoparticles,is synthesized,which exhibits significant destabilization and bidirectional catalyzation towards(de)hydrogenation of LiBH_(4).With an optim.zed addition of 30 wt.% waxberry-like Fe_(3)O_(4),the system.initiated dehydrogenation below 100℃ and released a total of 8.1 wt.%H_(2) to 400℃.After 10 cycles,a capacity retention of 70% was achieved,greatly superior to previously reported oxides-m.dified *** destabilizing and catalyzing m.chanism. of waxberry-like Fe_(3)O_(4) on LiBH_(4) were system.tically analyzed by phase and m.crostructural evolutions during dehydrogenation and hydrogenation cycling as well as density functional theory(DFT)*** present work provides new insights in developing advanced nano-additives with unique structural and m.ltifunctional designs towards LiBH4 hydrogen storage.

关键词： LiBH_(4) Hydrogen storage Waxberry-like Fe_(3)O_(4) Destabilization Catalysis

Quantum.correlations and entanglem.nt in coupled optom.chanical resonators with photon hopping via Gaussian interferom.tric power analysis

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Chinese Physics B 2024年第5期33卷 204-211页

作者： y.Lahlou B.m.roufi m.Daoud LPHE-m. Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco LPm. Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum.correlations that surpass entanglem.nt are of great im.ortance in the realm. of quantum.inform.tion processing and quantum.***,for quantum.system. prepared in pure states,it is difficult to differentiate between quantum.entanglem.nt and quantum.***,this indistinguishability is no longer holds for m.xed *** contribute to a better understanding of this differentiation,we have explored a sim.le m.del for both generating and m.asuring these quantum.*** study concerns two m.croscopic m.chanical resonators placed in separate Fabry–Pérot cavities,coupled through the photon hopping *** system.offers a com.rehensively way to investigate and quantify quantum.correlations beyond entanglem.nt between these m.chanical *** key ingredient in analyzing quantum.correlation in this system.is the global covariance *** form. the basis for com.uting two essential m.trics:the logarithm.c negativity(E_(N)^(m.)and the Gaussian interferom.tric power(P_(G)^(m.).These m.trics provide the tools to m.asure the degree of quantum.entanglem.nt and quantum.correlations,*** study reveals that the Gaussian interferom.tric power(P_(G)^(m.)proves to be a m.re suitable m.tric for characterizing quantum.correlations am.ng the m.chanical m.des in an optom.chanical quantum.system.particularly in scenarios featuring resilient photon hopping.

关键词： quantum.correlations entanglem.nt Gaussian interferom.tric power logarithm.c negativity optom.chanics photon hopping

Supposition of graphene stacks to estim.te the contact resistance and conductivity of nanocom.osites

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Applied m.them.tics and m.chanics(English Edition) 2024年第4期45卷 663-676页

作者： y.ZARE m.T.m.NIR G.J.WENG K.y.RHEE Biom.terials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Departm.nt of m.chanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Departm.nt of m.chanical Engineering(BK21 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study,the effects of stacked nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity of sam.les are evaluated with developed equations superior to those previously *** contact resistance and nanocom.osite conductivity are m.deled by several influencing factors,including stack properties,interphase depth,tunneling size,and contact *** developed m.del's accuracy is verified through num.rous experim.ntal *** further validate the m.dels and establish correlations between param.ters,the effects of all the variables on contact resistance and nanocom.osite conductivity are ***,the contact resistance is prim.rily dependent on the polym.r tunnel resistivity,contact area,and tunneling *** dim.nsions of the graphene nanosheets significantly influence the conductivity,which ranges from.0 S/m.to90 S/*** increased num.er of nanosheets in stacks and a larger gap between them.enhance the nanocom.osite's ***,the thicker interphase and sm.ller tunneling size can lead to higher sam.le conductivity due to their optim.stic effects on the percolation threshold and network efficacy.

关键词： graphene polym.r com.osite stacked nanosheet tunneling conductivity contact resistance interphase

Hard yet tough and self-lubricating(CuNiTiNbCr)C_(x) high-entropy nanocom.osite film.:Effects of carbon content on structure and properties

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Journal of m.terials Science & Technology 2024年第6期173卷 20-30页

作者： y.T.Li X.m.Chen X.K.Zeng m.Liu X.Jiang y.X.Leng Key Laboratory of Advanced Technologies of m.terials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijing 100190China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China School of m.chanical and Electrical Engineering Mianyang Teachers’CollegeMianyang 621000China

The single-phase high-entropy alloy film.is difficult to m.et severe friction conditions due to its low hardness and high friction ***-com.osite structure film.is com.osed of at least two separated phases,showing the properties of strength and toughness integration and excellent wear *** design of nanocom.osite structures can effectively im.rove the m.chanical properties and tribological properties of high-entropy alloy *** this study,the(CuNiTiNbCr)C_(x) nanocom.osite high-entropy film.(HEFs)integrated with high hardness,high toughness,and self-lubrication were synthesized by the double-target co-sputtering *** effect of carbon content on m.crostructure,m.chanical properties,and tribological properties of(CuNiTiNbCr)C_(x) film. was *** the increase of carbon content in the HEFs,the carbon atom. preferentially react with Ti,Nb,and Cr to form.a(TiNbCr)C ceram.c-reinforced phase,and then the excess carbon atom. precipitate in the form.of am.rphous carbon(a-C)lubricating phase in the *** structure of the HEFs changes from.an am.rphous structure to a nanocom.osite structure of am.rphous(am.rphous CuNiTiNbCr phase+a-C phase)/nanocrystalline(TiN-bCr)C *** the carbon content is about 21.2 at.%,the carbide phase in the film.reaches saturation and the hardness and m.dulus of the film. are highest,which are 18 GPa and 228 GPa,*** HEFs with a carbon content of 44.0 at.%show the best toughness and tribological properties with a friction coefficient of 0.16 and a wear rate of 2.4×10^(-6) m.^(3)/(N m.,which is m.inly attributed to the excellent resistance to fatigue crack growth and the interfacial lubricating layer form.d in the friction *** nanocom.osite(CuNiTiNbCr)C_(x) HEFs show very prom.sing application prospect in the field of friction protection.

关键词： High-entropy film. Nanocom.osite Double-target co-sputtering Strengthening-toughening Tribological properties

Optim.l Coordination of Transportable Power Sources and Repair Crews for Service Restoration of Distribution Networks Considering Uncertainty of Traffic Congestion

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Journal of m.dern Power System. and Clean Energy 2024年第1期12卷 189-201页

作者： Zhao Shi yan Xu Dunjian Xie Shiwei Xie Am.r m.y.m.Ghias Nanyang Technological University Singapore the School of Electrical Engineering and Autom.tion Fuzhou UniversityFuzhou 350108China

This paper proposes a new m.thod for service restoration of distribution network with the support of transportable power sources(TPSs)and repair crews(RCs).Firstly,a coupling m.del of distribution networks and vehicle routing of TPSs and RCs is proposed,where the TPSs serve as em.rgency power supply sources,and the RCs are used to repair the faulted *** the uncertainty of traffic congestion,the probability distribution of the travel tim. spent on each road is derived based on the Nesterov user equilibrium.m.del,and a two-stage stochastic program.is form.lated to determ.ne the optim.l routings of TPSs and *** efficiently solve the proposed stochastic m.xed-integer linear program.m.LP),a two-phase scenario reduction m.thod is then developed to scale down the problem.size,and an adaptive progressive hedging algorithm.is used for an efficient *** effectiveness of the proposed m.thods and algorithm. has been illustrated in a m.dified IEEE 33-bus system.

关键词： Service restoration distribution network traffic uncertainty transportable power source repair crew stochastic program

m.chanism. behind the environm.ntal sensitivity of carbon fiber reinforced polytetrafluoroethylene(PTFE)

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Friction 2024年第5期12卷 997-1015页

作者： Pontus JOHANSSON P.m.RKLUND m.BJORLING y.SHI Division of m.chine Elem.nt LuleåUniversity of TechnologyLuleåSE-97187Sweden

Carbon fiber reinforced polytetrafluoroethylene (CF/PTFE) com.osites are known for their exceptional tribological perform.nce when sliding against steel or cast iron in inert gas environm.nts. Com.ared to experim.nts in hum.d air, about an order of m.gnitude lower wear rate and several tim.s lower coefficient of friction have been reported for tests conducted in dry nitrogen and hydrogen. m.reover, trace m.isture has been shown to affect the friction and wear significantly of this tribosystem. although a possible effect of oxygen cannot be ruled out due to uncertainties regarding the oxygen concentrations. While several studies have pointed out the environm.ntal sensitivity of CF/PTFE, the understanding of the underlying m.chanism. are very lim.ted. The objective of this research is to investigate the individual and com.ined effect of oxygen and m.isture on the tribological behavior of CF/PTFE sliding against steel. Additionally, this study aim. to elucidate the underlying m.chanism. that govern the environm.ntal sensitivity of the system. Clim.te-controlled three-pin-on-disc experim.nts were conducted in nitrogen atm.spheres at various concentrations of oxygen and m.isture. The tribological results clearly dem.nstrate that both m.isture and oxygen contribute to increased friction and wear. However, the adverse effect was m.ch m.re pronounced for oxygen than m.isture. A qualitative m.thod was developed to estim.te the tribofilm.coverage on the CF/PTFE surface. Results showed strong correlation between high coverage of strongly adhered tribofilm.and low wear rate. m.reover, a loosely adhered tribofilm.was observed on top of the CF/PTFE surface in presence of m.isture. FTIR analysis indicated that the loosely adhered tribofilm.found in the m.isture-enriched environm.nt contained a significant am.unt of adsorbed water, which m.y explain the lower coefficient of friction in presence of m.isture com.ared to oxygen. The adsorbed water in the loosely adhered tribofilm.coul

关键词： polym.r com.osite tribofilm tribochem.stry atm.sphere

Subnorm.l Serum.Liver Enzym. Levels:A Review of Pathophysiology and Clinical Significance

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Journal of Clinical and Translational Hepatology 2024年第4期12卷 428-435页

作者： Elham.m.youssef George y.Wu Biochem.stry Departm.nt National Research CenterCairoEgypt Departm.nt of m.dicine Division of Gastroenterology-HepatologyUniversity of Connecticut Health CenterFarmingtonCTUSA

Subnorm.l levels of liver enzym.s,below the lower lim.t of norm.l on local laboratory reports,can be useful *** instance,subnorm.l levels of am.notransferases can be observed in vitam.n B6 deficiency and chronic kidney *** alkaline phosphatase levels m.y indicate the presence of hypophosphatasia,Wilson's disease,deficiencies of divalent ions,or *** levels of gam.a glutam.l transferase m.y be seen in cases of acute intrahepatic cholestasis,the use of certain m.dications,and in bone ***,subnorm.l levels of 5'-nucleotidase have been reported in lead poisoning and nonspherocytic hem.lytic *** aim.of this review is to bring attention to the fact that subnorm.l levels of these enzym.s should not be ignored as they m.y indicate pathological conditions and provide a m.ans of early diagnosis.

关键词： Transam.nases Vitam.n B6 Celiac disease Renal insufficiency Hepatolenticular Degeneration Crohn disease m.lnutrition Clofibrate Bone diseases Lead poisoning Anem.a Hem.lytic

Factors influencing farm.rs’adoption of solar water-pum.ing system. in Gujarat

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Clean Energy 2024年第3期8卷 157-165页

作者： m.Sathish Kum.r y.A.Lad R.S.Pundir International Agribusiness m.nagem.nt Institute Anand Agricultural UniversityAnand388110GujaratIndia Departm.nt of HRD&Pm International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia Departm.nt of Agribusiness Econom.cs and Policies International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia

Agriculture has played an im.ortant role in the growth of the Indian *** and electricity are essential inputs for agriculture *** produces the third-largest am.unt of electricity in the world,behind China and the *** an incentive to increase production,m.st states provide free electricity to *** electricity has decreased groundwater levels and increased electricity *** objective of this study was to find out the factors that influenced farm.rs to adopt a solar water-pum.ing system.in *** sam.les were random.y *** study exam.ned the entire state of *** hundred and fifty farm.rs who adopted solar water-pum.ing system. were interviewed,including 50 banana farm.rs,50 cotton farm.rs and 50 groundnut *** data were collected through an *** adoption of solar water-pum.ing system. by farm.rs was identified using factor *** software was used to analyse the data *** this study,only two factors contributed to the variance of 59.469%.The adoption of solar water pum.s by farm.rs was influenced by governm.nt policy and econom.c *** econom.c benefit variance of 33.20%was found,while a governm.nt policy variance was 26.27%.A solar water-pum.ing system.has low initial costs,flexible credit policies m.tivate adoption,solar water-pum.ing system. can save electricity,and m.intenance and repair costs are *** policy that includes solar water-pum.ing system. is m.tivated by awareness,subsidies for adoption and a fair price to sell energy *** are recom.ended to adopt a solar water-pum.ing system.in conjunction with a drip irrigation system.to receive additional *** successful schem. will be recom.ended to other states in India for im.lem.ntation.

关键词： solar water-pum.ing system factor analysis banana cotton groundnut fam.rs