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Factor. influencing far.er.' adoption of solar.water.pumping systems in Gujar.t

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CLEAN ENEr.Y 2024年第3期8卷 157-165页

作者： Kumar. m. Sathish Lad, Y. A. Pundir. r. S. Anand Agr.Univ Int Agribusiness Management Inst Anand 388110 Gujarat India Anand Agr.Univ Int Agribusiness Management Inst Dept HRD & PM Anand 388110 Gujarat India Anand Agr.Univ Int Agribusiness Management Inst Dept Agribusiness Econ & Pol Anand 388110 Gujarat India

Agr.cultur. has played an impor.ant r.le in the gr.wth of the Indian economy. Water.and electr.city ar. essential inputs for.agr.cultur. today. India pr.duces the thir.-lar.est amount of electr.city in the wor.d, behind China and the USA. As an incentive to incr.ase pr.duction, most states pr.vide fr.e electr.city to far.er.. Fr.e electr.city has decr.ased gr.undwater.levels and incr.ased electr.city consumption. The objective of this study was to find out the factor. that influenced far.er. to adopt a solar.water.pumping system in Gujar.t. The samples wer. r.ndomly selected. This study examined the entir. state of Gujar.t. One hundr.d and fifty far.er. who adopted solar.water.pumping systems wer. inter.iewed, including 50 banana far.er., 50 cotton far.er. and 50 gr.undnut far.er.. Pr.mar. data wer. collected thr.ugh an inter.iew. The adoption of solar.water.pumping systems by far.er. was identified using factor.analysis. SPSS softwar. was used to analyse the data collected. In this study, only two factor. contr.buted to the var.ance of 59.469%. The adoption of solar.water.pumps by far.er. was influenced by gover.ment policy and economic benefits. An economic benefit var.ance of 33.20% was found, while a gover.ment policy var.ance was 26.27%. A solar.water.pumping system has low initial costs, flexible cr.dit policies motivate adoption, solar.water.pumping systems can save electr.city, and maintenance and r.pair.costs ar. affor.able. Gover.ment policy that includes solar.water.pumping systems is motivated by awar.ness, subsidies for.adoption and a fair.pr.ce to sell ener.y sur.luses. Far.er. ar. r.commended to adopt a solar.water.pumping system in conjunction with a dr.p ir.igation system to r.ceive additional income. The successful scheme will be r.commended to other.states in India for.implementation. The factor. that influence far.er. to adopt a solar.water.pumping system in Gujar.t, India ar. identified based on inter.iews with one hundr.d and fifty r.ndomly sel

关键词： solar.water.pumping system factor.analysis banana cotton gr.undnut famer. PUr.HASE INTENTION ENEr.Y Ar.AS

Fr.eze-thaw cycles and associated geomor.hology in a post-glacial envir.nment:cur.ent glacial,par.glacial,per.glacial and pr.glacial scenar.os at Pico de Or.zaba volcano,mexico

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Jour.al of mountain Science 2024年第6期21卷 1954-1977页

作者： Víctor.SOTO Car.os m.WELSH r. Kenji YOSHIKAWA Hugo DELGadO Gr.NadOS Centr. de Ciencias de la Tier.a Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water.and Envir.nmental r.sear.h Center University of Alaska FairbanksFairbanksAlaska 99775USA Instituto de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Depar.ment of Ear.h and Envir.nmental Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial histor. of Pico de Or.zaba indicates that dur.ng the Last Glacial maximum,its icecap cover.d up to~3000 m asl;due to the air.temper.tur. incr.asing,its main glacier.has r.tr.ated to 5050 m *** r.tr.ction of the glacier.has left behind an intense climatic instability that causes a high fr.quency of fr.eze-thaw cycles of gr.at intensity;the r.sulting geomor.hological pr.cesses ar. r.pr.sented by the fr.gmentation of the bedr.ck that occupies the upper.par.s of the *** is a notable lack of studies r.gar.ing the fr.gmentation and er.sion occur.ing in tr.pical high mountains,and the associated geomor.hological r.sks;for.this r.ason,as a fir.t stage of futur. continuous r.sear.h,this study analyzes the fr.ezing and thawing cycles that occur.above 4000 m asl,thr.ugh continuous monitor.ng of sur.ace gr.und *** r.sults allow us to identify and char.cter.ze four.zones:glacial,par.glacial,per.glacial and *** was found that the par.glacial zone pr.sents an intense dr.p of temper.tur.,of up to~9℃ in only sixty *** r.ck fatigue and intense fr.eze-thaw cycles that occur.in this ar.a ar. r.sponsible for.the high r.te of r.ck disintegr.tion and r.pr.sent the main factor.of the constant slope dynamics that occur.at the *** activity decr.ases,both in fr.quency and intensity,accor.ing to the distance to the glacier.which is wher. the temper.tur. pr.sents a cer.ain degr.e of stability,until r.aching the pr.glacial zone,wher. cycles ar. almost non-existent,and ther.for. ther. is no gelifr.ction *** geomor.hological pr.cesses have r.sulted in significant alter.tions to the mountain slopes,which can have sever. consequences in ter.s of r.sk and water.

关键词： Fr.eze-Thaw Gelifr.ction mountain mechanical er.sion Per.glacial geomor.hology Postglacial scenar.os

Nonlinear.dynamic modeling of planar.moving Timoshenko beam consider.ng non-r.gid non-elastic axial effects

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Applied mathematics and mechanics(English Edition) 2024年第3期45卷 479-496页

作者： m.ABBASI GAVAr. m.r.HOmAEINEZHad Faculty of mechanical Engineer.ng K.N.Toosi University of TechnologyTehran 19991-43344Iran

Due to the impor.ance of vibr.tion effects on the functional accur.cy of mechanical systems,this r.sear.h aims to develop a pr.cise model of a nonlinear.y vibr.ting single-link mobile flexible *** manipulator.consists of an elastic ar.,a r.tar. motor.and a r.gid car.ier.and under.oes gener.l in-plane r.gid body motion along with elastic tr.nsver.e *** accur.tely model the elastic behavior.Timoshenko’s beam theor. is used to descr.be the flexible ar.,which accounts for.r.tar. iner.ia and shear.defor.ation *** applying Newton’s second law,the nonlinear.gover.ing equations of motion for.the manipulator.ar. der.ved as a coupled system of or.inar. differ.ntial equations(ODEs)and par.ial differ.ntial equations(PDEs).Then,the assumed mode method(Amm)is used to solve this nonlinear.system of gover.ing equations with appr.pr.ate shape *** assumed modes can be obtained after.solving the char.cter.stic equation of a Timoshenko beam with clamped boundar. conditions at one end and an attached mass/iner.ia at the *** addition,the effect of the tr.nsver.e vibr.tion of the inextensible ar. on its axial behavior.is *** the axial r.gidity,the effect makes the r.gid body dynamics invalid for.the axial behavior.of the ***,numer.cal simulations ar. conducted to evaluate the per.or.ance of the developed model,and the r.sults ar. compar.d with those obtained by the finite element *** compar.son confir.s the validity of the pr.posed dynamic model for.the *** to the mentioned featur.s,this model can be r.liable for.investigating the system’s vibr.tional behavior.and implementing vibr.tion contr.l algor.thms.

关键词： planar.moving Timoshenko beam non-r.gid non-elastic axial effect as-sumed mode method(Amm) nonlinear.motion analysis

Pile foundation in alter.ate layer.d liquefiable and non-liquefiable soil deposits subjected to ear.hquake loading

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Ear.hquake Engineer.ng and Engineer.ng Vibr.tion 2024年第2期23卷 359-376页

作者： Pr.veen Huded m Sur.sh r.Dash LEA Associates South East Asia Pvt.Ltd. New Delhi 110044India Indian Institute of Technology Bhubaneswar Khurda 752050India

Pile foundations ar. still the pr.fer.ed foundation system for.high-r.se str.ctur.s in ear.hquake-pr.ne *** foundations have exper.enced failur.s in past ear.hquakes due to *** on pile foundations in liquefiable soils has pr.mar.ly focused on the pile foundation behavior.in two or.thr.e-layer.d soil ***,in natur.l occur.ence,it may occur.in alter.ative layer. of liquefiable and non-liquefiable ***,the exper.mental and/or.numer.cal studies on the layer.d effect on pile foundations have not been widely addr.ssed in the *** of the design codes acr.ss the wor.d do not explicitly mention the effect of sandwiched non-liquefiable soil layer. on the pile *** the pr.sent study,the behavior.of an end-bear.ng pile in layer.d liquefiable and non-liquefiable soil deposit is studied *** study found that the kinematic bending moment is higher.and gover.s the design when the effect of the sandwiched non-liquefied layer.is consider.d in the analysis as opposed to when its effect is ***,ignor.ng the effect of the sandwiched non-liquefied layer.in a liquefiable soil deposit might be a nonconser.ative design appr.ach.

关键词： pile foundation liquefaction alter.ately layer.d soil fixity effect layer.d effect

Kinematic analysis of flexible bipedal r.botic systems

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Applied mathematics and mechanics(English Edition) 2024年第5期45卷 795-818页

作者： r.FAZEL A.m.SHAFEI S.r.NEKOO Depar.ment of mechanical Engineer.ng Shahid Bahonar University of KermanKerman ***Iran Depar.amento de Ingenier.a de Sistemas y Automatica Escuela Técnica Superior de IngenieriaUniversidad de SevillaSeville 41092Spain

In spite of its intr.nsic complexities,the passive gait of bipedal r.bots on a sloping r.mp is a subject of inter.st for.numer.us *** distinguishes the pr.sent r.sear.h fr.m similar.wor.s is the consider.tion of flexibility in the constituent links of this type of r.botic *** is not a far.fetched assumption because in the tr.nsient(impact)phase,due to the impulsive for.es which ar. applied to the system,the likelihood of exciting the vibr.tion modes incr.ases ***,the human leg bones that ar. involved in walking ar. suppor.ed by viscoelastic muscles and ***,for.achieving mor. exact r.sults,it is essential to model the r.bot links with viscoelastic *** this end,the Gibbs-Appell for.ulation and Newton's kinematic impact law ar. used to der.ve the most gener.l for. of the system's dynamic equations in the swing and tr.nsient phases of *** most impor.ant issue in the passive walking motion of bipedal r.bots is the deter.ination of the initial r.bot configur.tion with which the system could accomplish a per.odic and stable gait solely under.the effect of gr.vitational *** extr.mely unstable natur. of the system studied in this paper.and the vibr.tions caused by the impulsive for.es induced by the impact of r.bot feet with the inclined sur.ace ar. some of the ver. ser.ous challenges encounter.d for.achieving the above-mentioned *** over.ome such challenges,an innovative method that uses a combination of the linear.zed equations of motion in the swing phase and the algebr.ic motion equations in the tr.nsition phase is pr.sented in this paper.to obtain an eigenvalue *** solving this pr.blem,the suitable initial conditions that ar. necessar. for.the passive gait of this bipedal r.bot on a sloping sur.ace ar. *** effects of the char.cter.stic par.meter. of elastic links including the modulus of elasticity and the Kelvin-Voigt coefficient on the walking stability of this type of

关键词： bipedal r.bot flexible link swing phase tr.nsient phase eigenvalue pr.blem Kelvin-Voigt coefficient

Contr.l system design for.a pr.ssur.-tube-type super.r.tical water.cooled nuclear.r.actor.via a higher.or.er.sliding mode method

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Nuclear.Science and Techniques 2024年第1期35卷 145-154页

作者： m.Hajipour.G.r.Ansar.far Depar.ment of Nuclear.Engineer.ng Faculty of PhysicsUniversity of IsfahanIsfahan 81746-73441Iran

Nuclear.power.plants exhibit non-linear.and time-var.able ***,designing a contr.l system that sets the r.actor.power.and for.es it to follow the desir.d load is complicated.A super.r.tical water.r.actor.SCWr.is a four.h-gener.tion conceptual *** an SCWr.the non-linear.dynamics of the r.actor.r.quir. a contr.ller.capable of contr.l-ling the *** this study,a pr.ssur.-tube-type SCWr.was contr.lled dur.ng r.actor.power.maneuver.ng with a higher.or.er.sliding mode,and the r.actor.outgoing steam temper.tur. and pr.ssur. wer. contr.lled *** an SCWr.the temper.tur.,pr.ssur.,and power.must be maintained at a setpoint(desir.d value)dur.ng power.*** point kinetics equations with thr.e gr.ups of delayed neutr.ns wer. used in the ***-or.er.and classic sliding mode contr.ller. wer. separ.tely manufactur.d to contr.l the plant and wer. compar.d with the PI contr.ller. speci-fied in pr.vious *** contr.lled par.meter. wer. r.actor.power.steam temper.tur.,and ***,for.these par.meter.,the PI contr.ller.had cer.ain instabilities in the pr.sence of *** classic sliding mode contr.ller.had a higher.accur.cy and stability;however.its main dr.wback was the chatter.ng *** was highly accur.te and stable and had a small computational *** r.ality,it followed the desir.d values without oscillations and chatter.ng.

关键词： Super.r.tical water.nuclear.r.actor Higher.or.er.sliding mode contr.ller Steam temper.tur. Steam pr.ssur. Point kinetics model

Par.metr.c investigation on the novel and cost-effective nano fly ash impr.gnated geopolymer.system for.sustainable constr.ction

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2024年第2期18卷 170-183页

作者： r.mOHANA S.m.Leela BHAr.THI Depar.ment of Civil Engineer.ng Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazar.ous envir.nmental effects of gr.enhouse gas emissions and climate change demand alter.ative sour.es for.cementitious mater.als in the constr.ction *** development of geopolymer.str.ctur.s pr.vides a way of pr.ducing 100%cement-fr.e *** this r.sear.h wor.,a novel and simple way of der.ving nano par.icles fr.m waste fly ash par.icles is *** effect of adding the synthesized nano fly ash par.icles as a filler.medium in geopolymer.mor.ar. was investigated by consider.ng str.ngth and dur.bility *** optimization was done by using r.gr.ssion analysis on the geopolymer.mor.ar.and the impact of adding nano fly ash par.icles was studied by var.ing differ.nt per.entages of addition r.nging fr.m 0 to 7.5%by weight of binder.*** the r.sults,it was obser.ed that 1%nano fly ash acted not only as a filler.but also as nano-sized pr.cur.or. of the polymer.zation pr.cess,r.sulting in denser.geopolymer.*** can explain the extr.or.inar. gain in str.ngth of 72.11 mPa as well as the denser.cor. with negligible level of chlor.de ion penetr.tion,making the mater.al suitable for.the development of str.ctur.s susceptible to mar.ne envir.nment.

关键词： geopolymer nano fly ash chlor.de ion penetr.tion dur.bility polymer.zation filler.

粉末冶金Al-5.6Zn-2mg合金在热压缩过程中加工硬化特性及本构模型的比较

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Jour.al of Centr.l South Univer.ity 2024年第2期31卷 346-368页

作者： KATIKA Har.kr.shna DAmODA r.K. DAVIDSON m.J. SEETHAr.m r. KASAGANI Veer. Venkata Nagar.ju Depar.ment of mechanical Engineer.ng National Institute of TechnologyWarangal 506004India Depar.ment of mechanical Engineer.ng The Indian Institute of Information Technology Design and ManufacturingKurnool 518007India

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的... 详细信息

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的相关性。使用了四个本构模型,Ar.henius模型、改进的Johnson-Cook模型(mJC)、改进的Zer.lli-Ar.str.ng模型(mZA)和开发的人工神经网络(ANN)。结果表明,ANN型模型和Ar.henius模型的相对误差的绝对平均值最低,分别为0.486%和3.36%,mZA型模型和mJC型模型的相对误差的绝对平均值较高,分别为8.84%和3.93%。由于Ar.henius模型能够处理各种因素之间的非线性关系,因此它被认为是最合适的预测模型,但在材料性质未知或实验数据有限的情况下,mJC模型可能是一种更简单的替代方法。mZA模型不适合估计热压缩时的流变应力。此外,训练最好的神经网络模型的预测性能最好,相对误差的绝对平均值为0.486%,r.为0.99。

关键词：加工硬化速率曲线本构建模热压缩 EBSD分析流变曲线

Enhancement of coer.ivity,per.eability,and dielectr.c pr.per.ies of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) fer.ites for.memor. and high fr.quency devices

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Jour.al of r.r. Ear.hs 2024年第6期42卷 1128-1135,I0005页

作者： I.Sar.ar.m.D.Hossain m.S.Sikder.m.N.I.Khan m.r.r.hman Physics Discipline Khulna UniversityKhulna9208Bangladesh Depar.ment of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Depar.ment ofComputer.Science and Engineer.ng Northern University of Business&Technology KhulnaKhulna9100Bangladesh mater.al Science Division Atomic Energy CentreDhaka1000Bangladesh

Spinel cubic fer.ites have huge applications in me mor. and high fr.quency *** the impr.vement of these moder. devices,the magnetic coer.ivity,per.eability,and dielectr.c pr.per.ies of a fer.ite ar. the impor.ant *** ar.icle focuses on impr.ving the magnetic coer.ivity,magnetic per.eability,and dielectr.c pr.per.ies of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) fer.ites,wher. x=0.00,0.06,and *** X-r.y diffr.ction(Xr.),Four.er.tr.nsfor. infr.r.d spectr.scopy(FTIr.,field emission scanning electr.n micr.scopy(FESEm),ener.y disper.ive X-r.y(EDX),vibr.ting sample magnetometer.VSm),and an impedance analyzer.wer. used to char.cter.ze the str.ctur.l,magnetic,and dielectr.c pr.per.ies of the *** Xr. patter.s indicate the for.ation of spinel cubic str.ctur. of the samples with a secondar. peak(EuFeO_(3))for.Eu doped *** densities and por.sities of the samples follow an inver.e tr.nd,wher. the doped samples’lattice par.meter. ar. incr.ased with the incr.ment of r.r. ear.h Eu *** FTIr.analysis also pr.ves the spinel cubic phase of the *** aver.ge gr.in size of the fer.ites is obtained via FESEm images,and it is incr.ased fr.m 121 to 198 *** analysis confir.s that doping of the Eu content also changes other.hyster.sis loop pr.per.ies of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ***,the coer.ivity of the Eu doped samples is gr.ater.than that of the mother.alloy(x=0.00).The EDX study shows that ther. is no impur.ty contamination in the *** per.eability and dielectr.c measur.ments show an impr.ved quality factor.of the Eu-doped samples with low magnetic and dielectr.c *** dependent r.sistivity and impedance analysis also show the impr.ved *** the obser.ed pr.per.ies of the samples,all the investigated fer.ites might be str.ng candidates for.potential applications in memor. devices,magnetic sensor.,and high fr.quency applications.

关键词： Fer.ites r.r.e ar.hs Coer.ivity Per.eability EDX r.sistivity