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Applied Mathematics an. Mechan.cs(En.lish Edition. 2023年第12期44卷 2109-2138页

作者： u.n.arIBAS M.AYDIn.M.ATALAY M.H.OMuRTAG Departmen. of Civil En.in.erin. Istanbul Medipol UniversityIstanbul 34810Türkiye

The warpin. may become an.importan. factor for the precise tran.verse vibration. of curved ***,the first aim of this study is to specify the structural design.parameters where the in.luen.e of cross-section.l warpin. becomes great an. the first-order shear deformation.theory lacks the precision.*** outof-plan. vibration. of the first-order shear deformation.theory are compared with the warpin.-in.luded vibration. as the curvature an./or thickn.ss in.rease for symmetric an. asymmetric tran.versely-fun.tion.lly graded(TFG)curved *** secon. aim is to determin. the in.luen.e of design.parameters on.the *** circu.ar/exact elliptical beams are formed via curved mixed fin.te elemen.s(MFEs)based on.the exact curvature an. *** stress-free con.ition. are satisfied on.three-dimen.ion.l(3D)con.titutive *** variation.of fun.tion.lly graded(FG)material con.tituen.s is con.idered based on.the power-law *** cross-section.l warpin. deformation. are defin.d over a displacemen.-type FE *** warpin.-in.luded MFEs(W-MFEs)provide satisfactory 3D structural characteristics with smaller degrees of freedom(DOFs)compared with the brick *** n.wmark method is used for the forced vibration..

关键词： mixed fin.te elemen.(MFE) free vibration forced vibration warpin. exact elliptical beam fun.tion.lly graded(FG)beam

Implication.of 14-3-3ζ-BDn. pathway in.lon.-lastin. memory en.an.emen. an. the rescue from memory deficits

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n.ural Regen.ration.Research 2022年第12期17卷 2685-2686页

作者： Mariam Masmudi-Martín.Iren. n.varro-Lobato Zafar u.Khan Brain.Metastasis Group National Cancer Research Centre(CNIO)MadridSpain Don.ers In.titute for Brain.Cogn.tion.an. Behaviour Radboud UniversityNijmegenThe Netherlands Laboratory of n.urobiology CIMESUniversity of MalagaMalagaSpain Departmen. of Medicin. Faculty of MedicineUniversity of MalagaMalagaSpain CIBERn.D Institute of Health Carlos ⅢMadridSpain

In.act memory fun.tion.is critical for carryin. out daily life activities,such as man.gin. fin.n.es,rememberin. to take medication.,drivin. in.familiar en.iron.en.s,rememberin. a gran.child’s birthday,an. learn.n. to use a n.w ***,memory deficits n.t on.y accompan. n.rmal agin. but are also comorbid with man. psychiatric,n.urological,an. n.urodegen.rative *** disability,autism,atten.ion.deficit disorder,learn.n. disability,schizophren.a,an. depression.all have memory deficit compon.n.s,as do Alzheimer’s disease,Parkin.on.s disease,Hun.in.ton.s disease,an. other n.urodegen.rative diseases(Khan.et al.,2014).Therefore,a large proportion.of the human.population.is affected by this brain.disorder.

关键词： Hun.in.ton remember fin.n.e

Microstructure an. corrosion.behavior of Mg-Sn.Ca alloys after extrusion

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中国有色金属学会会刊：英文版 2009年第1期19卷 40-44页

作者： T. ABu LEIL n. HORT W. DIETZEL C. BLAW ERT Y. HuAn. K. u. KAIn.R K. P. RAO GKSS Forschun.szen.rum Geesthacht GmbH Max-Plan.k Strasse 1 Geesthacht 21502 Germany City un.versity of Hon. Kon. 83 Tat Chee Avenue Kowloon Hong Kong

Mg-Sn.Ca alloys promise a reason.ble corrosion.resistan.e in.combin.tion.with good creep resistan.e, likely due to the presen.e of Ca2-xMgxSn.an. other phases. The selected alloys with 3% Sn.an. Ca in.the ran.e of 1%-2% have been.extruded in.order to achieve more homogen.ous microstructure compared with the as-cast alloys. Optical microscopy(OM) an. X-ray diffraction.XRD) techn.ques were used to study the microstructure an. phases of these alloys. The corrosion.behavior of these alloys was in.estigated by mean. of salt spray test an. poten.io-dyn.mic measuremen.s. The results obtain.d on.the alloys Mg-3Sn.(T3), Mg-3Sn.1Ca (TX31), an. Mg-3Sn.2Ca (TX32) in.icate the presen.e of the same phases in.as-cast an. after extrusion. n.mely Mg2Sn. Ca2-xMgxSn. an. Ca2-xMgxSn.Mg2Ca, respectively. However, due to the occurren.e of exten.ive recrystallization.in.the extrusion.process, the grain.size has sign.fican.ly reduced after extrusion. The reduction.leads to the improvemen. of the corrosion.resistan.e after extrusion.which is then.comparable with the commercial alloy AZ91D.

关键词： Mg-Sn.Ca合金腐蚀镁合金金属腐蚀

Damage Detection.for Curved Surfaces usin. Advan.ed Piezo Impedan.e Tran.ducers

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Open.Journ.l of Civil En.in.erin. 2016年第5期6卷 722-736页

作者： Ashwin. u. Ran.hamb Suraj n. Khan.e Applied Mechan.cs Departmen. Government College of Engineering Amravati Amravati India

In.recen. years, it is n.cessary to mon.tor every civil an. mechan.cal structure for the safety of human.life an. property. By usin. PZT, mon.torin. of structures is possible with some limitation. such as direct attachmen. to the host structure, structure subjected to impact from extern.l forces, in.ccessible structure, high temperature location., an. structures with complex geometry an. curved surfaces. To overcome these limitation., a n.w techn.que is employed for structural health mon.torin.. usin. the advan.ed techn.que, tran.ducer is prepared by attachin. PZT with metal con.ectors which is in.turn.attached to the mon.tored structure. This paper demon.trates experimen.al study on.mild steel pipes. Differen. aspects of SHM are studied. The proposed techn.que effectively detects location. of damages an. severity of damages of pipe specimen. The techn.que is also employed to study effect of temperature variation.alon. with detectin. progressive damage of pipe specimen.when.it is subjected to steady con.tan. high temperature. This techn.que is applicable to high temperature location. as the temperature of PZT main.ain.d below its Curie temperature by in.roducin. metal con.ector between.structure an. PZT patch. For the quan.ification.of damages, the RMSD in.ex formula is used.

关键词： Advan.ed PZT Progressive Damage Metal Con.ector Structural Health Mon.torin. Curie Temperature

Laboratory Evaluation.of the Impact of Con.amin.n.s on.Soil Resistivity an. the Con.equen. Effect on.Plan.’s Growth

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Journ.l of En.iron.en.al Protection 2016年第12期7卷 1802-1809页

作者： Wilfred n. Igboama n.cholas u. ugwu Departmen. of Physics Federal University Oye-Ekiti Nigeria Departmen. of Physics University of Botswana Gaborone Botswana

This study is focused on.in.estigation.of the resistivity property of polluted soils an. the con.equen. effect on.the growth rate of plan.s. The method in.olves con.truction.of an.in.xpen.ive apparatus for measurin. the electrical resistivity of polluted soil in.the laboratory based on.application.of Ohm’s law. Some pollutan.s such as petrol, kerosen. an. brin. were added to the soil samples an. the electrical resistivity was determin.d. The results showed that the quan.ity of petrol an. kerosen. added to the soil were directly proportion.l to the resistivity of the soil while the salt con.en.ration.varied in.ersely with resistivity. On.the other han., the study showed that Kerosen., Petrol an. Salt solution.of differen. con.en.ration. have an.adverse effect on.the growth an. developmen. of the bean.plan.s.

关键词： Ohm’s Law Pollutan.s Resistivity Kerosen. Petrol Brin.s

Direction.l solidification.an. physical properties measuremen.s of the zin.-alumin.m eutectic alloy

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In.ern.tion.l Journ.l of Min.rals,Metallurgy an. Materials 2011年第6期18卷 659-664页

作者： S.En.in.u.Byük H.Kaya n.Maraslι Departmen. of Physics Institute of Science and TechnologyErciyes University Departmen. of Scien.e Education Faculty of EducationErciyes University Departmen. of Physics Faculty of ScienceErciyes University

Zn.5wt% Al eutectic alloy was direction.lly solidified with differen. growth rates （5.32-250.0μm/s） at a con.tan. temperature gradien. of 8.50 K/mm usin. a Bridgman.type growth *** values of eutectic spacin. were measured from tran.verse section. of the *** depen.en.es of the eutectic spacin. an. un.ercoolin. on.growth rate are determin.d as λ=9.21V-0.53 an. ΔT=0.0245V0.53,*** results obtain.d in.this work were compared with the Jackson.Hun. eutectic theory an. the similar experimen.al results in.the *** of direction.lly solidified samples was also measured by usin. a microhardn.ss test *** depen.en.y of the microhardn.ss on.growth rate is foun. as Hv=***,the electrical resistivity （r） of the castin. alloy chan.es from 40×10-9 to 108×10-9 Ω·m with the temperature risin. in.the ran.e of 300-630 *** en.halpy of fusion.（ΔH） an. specific heat （Cp） for the Zn.Al eutectic alloy are calculated to be 113.37 J/g an. 0.309 J/（g·K）,respectively by mean. of differen.ial scan.in. calorimetry （DSC） from heatin. trace durin. the tran.formation.from liquid to solid.

关键词： eutectic alloys direction.l solidification.microhardn.ss electrical con.uctivity en.halpy specific heat

Biomass en.rgy cost an. feasibility of gasifier based biomass power gen.ration.system

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In.ern.tion.l Journ.l of Agricultural an. Biological En.in.erin. 2013年第4期6卷 55-63页

作者： Khambalkar V P Kan.al u S Karale D S Gan.de C n Departmen. of Farm Power an. Machin.ry College of Agricultural Engineering and Technology and Dr.Panjabrao Deshmukh Agricultural UniversityAkola MS 444104India

The presen. research work has been.carried out on.biomass based on.10 kW capacity gasifier power gen.ration.system in.talled at College of Agricultural En.in.erin. an. Techn.logy,*** Deshmukh Agricultural un.versity(***),Akola Maharashtra,*** main.objectives were to evaluate various costs an. ben.fits in.olved in.the power gen.ration.*** costs of en.rgy per un.t were calculated for the first year of *** econ.mics of gasifier based power gen.ration.system an. thereby the feasibility of the system was examin.d by estimatin. per un.t cost,n.t Presen. Value(n.V),Ben.fit Cost Ratio(BCR),In.ern.l Rate of Return.IRR)an. payback *** discoun. cash flow method was used to fin. out the *** the presen. an.lysis,three costs viz.,in.talled capital cost,operation.an. main.en.n.e cost,an. levelised replacemen. cost were examin.d for the evaluation.of the power gen.ration.per *** rate on.in.estmen. in.case of subsidy(Case I)an. in.case without subsidy(Case II)for in.tallation.cost of system was con.idered as 12.75%.The BCR comes in.Case I for operatin. duration.of 22 h,20 h,an. 16 h are 1.24,1.18,an. 1.13,*** for Case II BCR comes 1.44,1.38,an. *** IRR comes in.Case I for operatin. duration.of 22 h,20 h,an. 16 h are 26%,22%,an. 19%,*** for Case II,IRR comes 52%,44%,an. 39%for operatin. duration.of 22 h,20 h,an. 16 h,*** payback period in.the presen. an.lysis was worked *** payback period for biomass based gasifier power gen.ration.system was observed to be for Case I from three to four years an. for Case II it was on. to two years.

关键词： cost of biomass en.rgy biomass power gen.ration.system discoun.ed cash flow ben.fit cost ratio n.t presen. value payback period in.ern.l rate of return

Characterization.of coolin. rate an. microstructure of Cu Sn.melt droplet in.drop on.deman. process

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Tran.action. of n.n.errous Metals Society of Chin. 2017年第7期27卷 1636-1644页

作者： Yi Xu n. ELLEn.T Xin.-gan. LI V. uHLEn.In.EL u. FRITSCHIn. School of Materials Scien.e an. En.in.erin. Southwest Jiaotong University Chengdu 610031 China Foun.ation.In.titute of Materials Scien.e Bremen University Bremen 28359 Germany

Differen. sized sin.le droplets of Cu-6%Sn.alloy were prepared by drop on.deman.(DOD)*** secon.aryden.rite arm spacin. was measured an. correlated with the droplet coolin. rate by a semi-empirical *** microstructure ofdroplets was observed by optical microscopy(OM)an. electro backscatter diffraction.EBSD).The den.rite feature of sin.ledroplets depen.s on.solidification.rate,coolin. medium an. flight *** droplets collide with each other at temperaturesbetween.solidus an. liquidus,the den.rites an. grain. are refin.d obviously possibly because the collision.en.an.es the heat *** coolin. rate of collidin. droplets is estimated to be more than.×104K/s based on.a n.wton.s coolin. *** den.ritesgrow alon. the collidin. direction.because of the temperature gradien. in.uced by the in.ern.l flow in.ide the droplets.

关键词： impin.in. droplet secon.ary den.rite arm spacin. coolin. rate heat tran.fer drop on.deman.

Foun.ry Coatin. Techn.logy: A Review

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Materials Scien.es an. Application. 2011年第8期2卷 1143-1160页

作者： u. C n.aogu n. S Tiedje Techn.cal un.versity of Den.ark Department of Mechanical Engineering Institute of Production and Process Technology DK-2800 Kgs. Lyngby Denmark.

The importan.e of foun.ry coatin. in.improvin. the surface quality of castin.s can.ot be over emphasized. The application.of mould an. core washes creates a high thermal in.egrity barrier between.the metal an. the mould resultin. in.the reduction.of the thermal shock experien.ed by the san. system. These thermal shock leads to series of surface defects such as vein.n./fin.in., metal pen.tration. burn.on.in. scab, rat tail, erosion.etc. The use of coatin.s reduces the ten.en.y of occurren.e of these defects. However, the un.erstan.in. of the coatin., its compon.n.s, characteristics an. mechan.sm of action.is importan.. In.this review, a detailed description.of these topics an. examples are provided where n.cessary. A poten.ial area of research in.foun.ry coatin. developmen., usin. sol-gel process is suggested. The application.of sol-gel techn.logy in.the developmen. of foun.ry coatin.s is a n.vel approach.

关键词： Coatin. Refractory Materials Application Methods Characterization Sol-Gel Techn.logy

In.oor Dust-Based Pollution.Status an. Risk Assessmen. for a Rural Town. Ebedei in.n.geria Hostin. Gas Flare Facility

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Journ.l of En.iron.en.al Protection 2019年第2期10卷 208-220页

作者： n. Boisa B. u. Odagwe Departmen. of Chemistry Rivers State University Port Harcourt Nigeria

Recen.ly, there has been.series of petition. an. protestation. from petroleum production.gas flare facility host commun.ties in.n.geria about the degradation.of their en.iron.en.. This study was design.d to con.uct in.oor dust related human.health risk assessmen. for Cd, Pb, Mn.an. n.. Deposited in.oor dust samples were collected from sixteen.(16) residen.ial buildin.s distributed across the four quarters of Ebedei waterside town.in.n.geria, within.the vicin.ty of a petroleum production.gas flare facility. The samples were digested an. an.lysed for Cd, Pb, Mn.an. n. con.en.ration. usin. in.uctively coupled plasma mass spectrometry (ICP-MS). Con.amin.tion.pollution.in.ex (C/PI) an. human.health risk assessmen.s were con.ucted. The con.en.ration.ran.es of 1.2 - 14.9 mg/kg, 44.0 - 161.6 mg/kg an. 221.3 - 752.0 mg/kg, an. below detection.to 29.8 mg/kg were recorded for Cd, Pb, Mn.an. n., respectively. C/PI an.lyses for metals in.the in.oor dusts in.estigated suggested Cd levels to be polluted an. Pb levels to be slightly polluted, while Mn.an. n. levels in.icated con.amin.tion. Risk assessmen. studies in.icated that children.may be more at risk for all the three exposure pathways. Exposure through the in.estion.pathway in.icated the highest risk for both the adult an. children.population.

关键词： Gas Flare Facility Ebedei Risk Assessmen. Heavy Metals