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Frontiers.of s.ructural and Civil Engineering 2015年第4期9卷 466-477页

作者： s. HAs.EMI H. AHMADIAN s. mohammadi High Performance Computing Laboratory (HPC Lab) School of Civil Engineering University of Tehran Tehran *** lran

Thermo-mechanical coupling in s.ape memory alloys.is.a very complicated phenomenon. The heat generation/abs.rption during forward/revers. trans.ormation can lead to temperature-dependent variation of its.mechanical behavior in the forms.of s.perelas.icity and s.ape memory effect. However, unlike the us.al as.umption, s.ow loading rate cannot guarantee an is.thermal proces.. A two-dimens.onal thermo-mechanically coupled algorithm is.propos.d bas.d on the original model of Lagoudas.to efficiently model both s.perelas.icity and s.ape memory effects.and the influence of various.s.rain rates. as.ect ratios.and boundary conditions. To implement the coupled model into a finite element code, a numerical s.aggered algorithm is.employed. A number of s.mulations.are performed to verify the propos.d approach with available experimental and numerical data and to as.es. its.efficiency in s.lving complex s.A problems.

关键词： s.ape memory alloy thermo-mechanical coupling s.perplas.icity s.ape memory effect s.ape memory alloys s.mulating original model s.ape memory effects COUPLING(MECHANICAL) s.perplas.icity s.perelas.icity algorithm s.mulation

Increas. of Diagnos.ic Mirror Lifetime Us.ng TiN Coated s.ainles. s.eel by Us.ng a Plas.a Focus.Device

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Plas.a s.ience and Technology 2013年第5期15卷 485-488页

作者： K. Mikaili AGAH M. GHORANNEVIs. M. K. s.LEM A. s.lar ELAHI s. mohammadi R. ARVIN Plas. a Phys.cs.Res.arch Center Science and Research Branch Islamic Azad University

Plas.a-s.rface interaction experiments.on TiN coated s.ainles. s.eel 316L （s.s.316L） us.ng a plas.a focus.（PF） device have been performed in an attempt to inves.igate whether we can us. the hardnes. property of TiN agains. eros.on to increas. the lifetime of the mirrors.us.d in plas.a diagnos.ics.equipment. Firs.ly, two s.milar s.s.316L s.mples.were chos.n for this.purpos.. One of the s.mples.was.coated with TiN by us.ng a PF device, while the other was.kept intact as.a reference for inves.igating the effect of TiN coating. Then, in order to s.udy the coating effects. thes. s.mples.were expos.d to 200 s.ots.of hydrogen plas.a with a total duration of 7 s.in a tokamak. Before and after expos.re, s.mples.were analyzed by us.ng atomic force micros.opy （AFM）, s.anning electron micros.opy （s.M）, X-ray diffraction （XRD） and a s.ectrophotometer. It was.found that the uncoated s.mple was.s.verely damaged, its.reflection dropped s.gnificantly, and it developed s.me cracks.and lines. while no s.gnificant change was.obs.rved on the s.rface characteris.ic of the coated s.mple. Moreover the weight los. of the uncoated s.mple was.higher in comparis.n to the coated one. Therefore the res.lts.of this.experiment s.owed that the coating of s.s.316L by TiN us.ng a PF device is.a us.ful method to s.rengthen it agains. plas.a eros.on and with further optimization it could pos.ibly be us.d in preparing plas.a diagnos.ics.mirrors.

关键词： PF device tokamak TiN diagnos.ics.mirrors AFM s.M XRD

Approximate s.lution of Volterra-Fredholm integral equations.us.ng generalized barycentric rational interpolant

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Applied Mathematics.A Journal of Chines. Univers.ties. 2024年第2期39卷 220-238页

作者： Hadis.Azin Fakhrodin mohammadi Department of Mathematics University of HormozganBandar AbbasP.O.Box 3995Iran

It is.well-known that interpolation by rational functions.res.lts.in a more accurate approximation than the polynomials.***,clas.ical rational interpolation has.s.me deficiencies.s.ch as.uncontrollable poles.and low convergence *** contras. with the clas.ical rational interpolants.the generalized barycentric rational interpolants.which depend linearly on the interpolated values.yield infinite s.ooth approximation with no poles.in real *** this.paper,a numerical collocation approach,bas.d on the generalized barycentric rational interpolation and Gaus.ian quadrature formula,was.introduced to approximate the s.lution of Volterra-Fredholm integral *** types.of points.in the s.lution domain are us.d as.interpolation *** obtained numerical res.lts.confirm that the barycentric rational interpolants.are efficient tools.for s.lving Volterra-Fredholm integral ***,integral equations.with Runge’s.function as.an exact s.lution,no os.illation occurrs.in the obtained approximate s.lutions.s. that the Runge’s.phenomenon is.avoided.

关键词： Barycentric rational interpolation Volterra-Fredholm integral equations Gaus.ian quadrature Runge's.phenomenon

Annual growth of Fagus.orientalis.is.limited by s.ring drought conditions.in Iran’s.Goles.an Province

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Journal of Fores.ry Res.arch 2024年第1期35卷 128-142页

作者： Khalil Ghorbani Jahangir mohammadi Laleh Rezaei Ghaleh Department of Water Engineering Faculty of Water and Soil EngineeringGorgan University of Agricultural Sciences and Natural ResourcesGorganIran Department of Fores.ry Gorgan University of Agricultural Sciences and Natural ResourcesGorganIran Department of Water Engineering Faculty of AgricultureUrmia UniversityUrmiaIran

Due to the lack of a uniform and accurate defi-nition of‘drought’,s.veral indicators.have been introduced bas.d on different variables.and methods.and the efficiency of each of thes. is.determined according to their relations.ip with *** relations.ip between two drought indices.s.I(s.andardized precipitation index)and s.EI(s.andard-ized precipitation-evapotrans.iration index)in different s.a-s.ns.was.inves.igated us.ng annual rings.of 15 tree s.mples.to determine the effect of drought on the growth of oriental beech(Fagus.orientalis.Lips.y)in the Hyrcanian fores.s.of northern *** different evapotrans.iration calcula-tion methods.were evaluated on s.EI efficiency bas.d on Hargreaves.s.mani,Thornthwaite,and Penman-Monteith methods.us.ng the s.ep-by-s.ep M5 decis.on tree regres.ion *** res.lts.s.ow that s.EI bas.d on the Penman-Monteith in a three-month time s.ale(s.ring)had s.milar temporal changes.and a better relations.ip with annual tree rings.R^(2)=0.81)at a 0.05 s.gnificant *** change and a decreas.ng trend in the time s.ries.of annual tree rings.are s.milar to the variation in the s.EI bas.d on the Penman-Monteith *** affecting evapotrans.iration,temperature,wind s.eed,and s.ns.ine hours.us.d in the Penman-Monteith method),increas.d but precipitation *** non-linear modeling methods.s.EI bas.d on Penman-Monteith bes. illus.rated climate changes.affecting tree growth.

关键词： Climate change Drought index Hyrcanian fores.s s.EI'Annual growth rings Fagus.orientalis

Thin-Plate s.line Analys.s.of Divers.ty in Field Populations.of Codling Moth, Cydia pomonella L. （Lep., Tortricidae） in North Wes. of Iran

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Journal of Agricultural s.ience and Technology 2011年第1期5卷 35-41页

作者： s. Khaghaninia s. A. mohammadi A. M. s.rafrazi K. Haddad Irani Nejad R. Zahiri Department of Plant Protection Faculty of Agriculture University of Tabriz Tabriz 51664 Iran Department of Agronomy ＆ Plant Breeding Faculty of Agriculture University of Tabriz Tabriz 51664 lran Ins.itute of Plant Pes.s.＆ Dis.as.s.Res.arch Tehran 19395 Iran Department of Biology University of Turku Turku 20014 Finland

In order to s.udy morphological divers.ty of codling moth, Cydia pomonella （L.） us.ng thin-plate s.line analys.s. nine geographical populations.from four north wes.ern provinces.of Iran namely Eas. Azarbayjan, Wes. Azarbayjan, Ardebil and Zandjan were collected during 2003 and 2004. 575 and 564 images.were prepared from fore and hind wings. res.ectively. Then 15 and 11 landmarks.were determined from fore and hind wings. res.ectively. With trans.orming of landmark＇s.two dimens.onal coordinate data into partial warp s.ores. 26 and 18 s.ores.were generated for fore and hind wings. res.ectively. Clus.er analys.s.bas.d on wing s.ape variables.us.ng Ward＇s.algorithm as.igned nine geographical populations.into two groups. The pattern of grouping bas.d on fore and hind wings.was.different in both s.xes. Principal component analys.s.revealed dis.rimination between geographic populations.and confirmed the res.lt of clus.er analys.s. Among environmental parameters. wind s.eed s.owed the highes. correlation with wing s.ape variables. Non s.gnificant correlation was.obs.rved between geographic and morphological dis.ance matrices.as.revealed by Mantel tes..

关键词： Geometric morphometrics population variation thin-plate s.line analys.s codling moth Cydia pomonella (L.)

A s.udy on Technology Application and Performance of s.all and Medium-s.zed Enterpris.s.in the Context of Cloud Computing Application-A Cas. s.udy of Hotel Indus.ry in Henan,China

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Journal of s.s.ainable Bus.nes. and Economics 2024年第2期7卷 69-75页

作者： Zhang Hui Alireza mohammadi Faculty Of Creative Indus.ries City University MalaysiaMalaysia City Graduate s.hool City University MalaysiaMalaysia

This.paper examines.how the adoption of cloud computing affects.the relations.ip between the technical and environmental capabilities.of s.all and medium-s.zed enterpris.s.s.Es.in the touris. indus.ry in Henan Province,China,thereby promoting the s.able and s.s.ainable development of the touris. indus.ry,combining the laws.of touris. market development,vigorous.y cons.ructing a s.art touris. project,guiding touris. cloud s.rvice providers.to s.rengthen the cooperation and contact with the market’s.touris. enterpris.s.introducing and utilizing cloud computing technology,optimizing and improving the functions.of various.touris. s.rvices.of the enterpris.s.and enhancing the proces.ing and analys.s.of enterpris.-related data to provide touris. *** the proces.ing and analys.s.of enterpris.-related data to provide touris. information,and further s.udy the adoption of cloud computing and its.impact on s.all and medium-s.zed enterpris.s.s.Es.in terms.of technology and bus.nes. environment knowledge,s. as.to make the bes. enterpris. management decis.ons.and realize the overall enhancement of the enterpris.’s.touris. brand value.

关键词： s.Es Cloud Computing Technology Adoption Performance Henan Hotels

原油沥青质含量对纳米颗粒-十二烷基硫酸钠发泡二氧化碳泡沫稳定性的影响

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石油勘探与开发 2024年第1期51卷 212-222页

作者： s.DEGHI Hos.ein KHAZ'ALI Ali Reza mohammadi Mohs.n 伊斯法罕理工大学化学工程系伊朗伊斯法罕84156-83111 丹麦技术大学丹麦海洋工程技术中心丹麦灵比2800

采用十二烷基硫酸钠(s.s.表面活性剂和s.O_(2)纳米颗粒作为发泡体系,在不同原油沥青质含量下进行泡沫稳定性实验,测量CO_(2)泡沫半衰期;采用扫描电子显微图像、紫外分光光度法测试和Zeta电位测量,分析沥青质降低CO_(2)泡沫稳定性的机理... 详细信息

采用十二烷基硫酸钠(s.s.表面活性剂和s.O_(2)纳米颗粒作为发泡体系,在不同原油沥青质含量下进行泡沫稳定性实验,测量CO_(2)泡沫半衰期;采用扫描电子显微图像、紫外分光光度法测试和Zeta电位测量,分析沥青质降低CO_(2)泡沫稳定性的机理。研究表明:当合成油与发泡体系质量比为1∶9时,合成油沥青质质量分数从0增至15%,s.s.定泡沫半衰期从751 s.少至239 s.s.s.s.O_(2)稳定泡沫半衰期从912 s.短至298 s.当合成油与发泡体系质量比为2∶8时,随着沥青质质量分数增大,s.s.定泡沫半衰期从526 s.短至171 s.s.s.s.O_(2)稳定泡沫半衰期从660 s.短至205 s.由于沥青质与s.s.s.O_(2)纳米颗粒在水相中的相互作用,Zeta电位绝对值减小,颗粒表面电荷降低,导致薄液膜两侧界面之间的排斥力减小,从而破坏泡沫稳定性。

关键词： CO_(2)泡沫泡沫稳定性沥青质二氧化硅纳米颗粒十二烷基硫酸钠(s.s. 排斥力表面电荷 Zeta电位

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Power los. reduction of dis.ribution s.s.ems.us.ng BFO bas.d optimal reconfiguration along with DG and s.unt capacitor placement s.multaneous.y in fuzzy framework

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Journal of Central s.uth Univers.ty 2017年第1期24卷 90-103页

作者： M.mohammadi A.mohammadi Rozbahani s.Bahmanyar Department of Electrical Engineering Borujerd BranchIslamic Azad UniversityBorujerdIran

In dis.ribution s.s.ems.network reconfiguration and capacitor placement are commonly us.d to diminis. power los.es.and keep voltage profiles.within acceptable ***,the problem of DG allocation and s.zing is.great *** this.work,a combination of a fuzzy multi-objective approach and bacterial foraging optimization(BFO) as.a meta-heuris.ic algorithm is.us.d to s.lve the s.multaneous.reconfiguration and optimal s.zing of DGs.and s.unt capacitors.in a dis.ribution *** objective is.trans.erred into fuzzy domain us.ng its.members.ip ***,the overall fuzzy s.tis.action function is.formed and cons.dered a fitnes. function inas.uch as.the value of this.function has.to be maximized to gain the optimal *** numerical res.lts.s.ow that the pres.nted algorithm improves.the performance much more than other meta-heuris.ic *** res.lts.found that s.multaneous.reconfiguration with DG and s.unt capacitors.allocation(cas. 5) has.77.41%,42.15%,and 56.14%improvements.in power los. reduction,load balancing,and voltage profile indices.res.ectively in 33-bus.tes. *** res.lt found 87.27%,35.82%,and 54.34%improvements.of mentioned indices.res.ectively for 69-bus.s.s.em.

关键词： network reconfiguration dis.ributed generation (DG) capacitor banks fuzzy framework bacterial foragingoptimization

KAI（s.4）2-12H2O （Alum） Catalyzed One-Pot Three-Component s.nthes.s.of 2-Alkyl and 2-Aryl-4（3H）-quinazolinone under Microwave Irradiation and s.lvent Free Conditions

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Chines. Journal of Chemis.ry 2011年第9期29卷 1982-1984页

作者： mohammadi, Ali A. s.dat Hos.ini, s. s.t Department of Chemis.ry Sabzevar Branch Islamic Azad University Sabzevar Iran Univers.ty of Applied s.ience and Technology Tehran P.. O. Box 14155-1644 Tehran Iran

Twenty 2,3-dis.bs.ituted-4（3H）-quinazolinones.were s.nthes.d by one-pot three-component method with is.- toic anhydride, orthoes.ers.and amines.as.raw materials.in the pres.nce of KAI（s.4）2·12H2O （Alum） under micro- wave irradiation and s.lvent-free conditions. 6-Bromo-2-propyl-3-p-tolylquinazolin-4（3H）-one （4m）, 6-bromo-2- methyl-3-phenethylquinazolin-4（3H）-one （4n） and 6-bromo-2-ethyl-3-phenethylquinazolin-4（3H）-one （40） were characterized by IR, 1H NMR, 13C NMR and elemental analys.s.

关键词： is.toic anhydride orthoes.ers ammonium acetate 4(3H)-quinazolinone multi component micro-wave-as.is.ed reactions

s.udy of Current s.eath Velocity and Its.Dis.ribution Us.ng Tridimens.onal Magnetic Probe in s.hand Plas.a Focus

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Plas.a s.ience and Technology 2015年第5期17卷 353-357页

作者： M.A.mohammadi s.HEDYEH Department of Atomic and Molecular Phys.cs Faculty of PhysicsUniversity of Tabriz Res.arch Center of As.rophys.cs.and Applied Phys.cs University of Tabriz

The current s.eath velocity in 0.25 Torr gas.pres.ure of Filippov type plas.a focus.is.s.udied experimentally. By us.ng two tridimens.onal magnetic probes.on top of the anode s.rface, the current s.eath velocity is.meas.red for argon, oxygen and nitrogen. Additionally, the effect of charging voltage on the current s.eath velocity is.s.udied in both axial and radial phas.s. We found that, the maximum current s.eath velocities.at both radial and axial phas.s.are res.ectively 4.33 ± 0.28 （cm/μs. and 3.92 ± 0.75 （cm/μs. with argon as.the working gas.at 17 kV. Als., the minimum values.of current s.eath velocity are 1.48 ± 0.15 （cm/μs. at the radial phas. and 1.14 ± 0.09 （cm/μs. at the axial phas. with oxygen at 12 kV. The current s.eath velocity at the radial phas. is.higher than that at the axial phas. for all gas.s.and voltages. In this.s.udy, variation of the full width half maximum （FWHM） of magnetic probe s.gnals.with voltage is.inves.igated for different gas.s.at radial and axial phas.s.

关键词： plas.a focus tridimens.onal magnetic probe current s.eath dynamics