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Tr.nsactions of Nonfer.ous Metals society of China 2017年第5期27卷 986-997页

作者： r. ambigai, s s. Pr.BHU Depar.ment of Mechanical Engineer.ng SRM University Chennai 603203 India

The tr.bological behaviour.of gr.vity die stir.cast LM6alloy with gr.phite(Gr.and silicon nitr.de nanopar.icles was ***?Gr.si3N4hybr.d composite,Al?si3N4nanocomposite and Al?Gr.nanocomposites wer. separ.tely fabr.cated to investigate their.fr.ctional and wear.char.cter.stics under.dr. sliding *** was used to ensur. the unifor. pr.sence of nano si3N4and gr.phite in the cast.L9or.hogonal ar.ay method was chosen to conduct the exper.ments to study the effect of differ.nt applied loads(20,30and40N)and sliding distances(1,2and3km).The r.sults showed that the r.spective wear.r.te and coefficient of fr.ction(COF)decr.ased by25%and15%for.hybr.d composite when compar.d with those of Al?si3N4nanocomposite wher.as the wear.r.te and COF of Al?Gr.was found to be ver. *** micr. Vicker. har.ness of the hybr.d composite was14%mor. than that of the simple nanocomposite and ther. was not much notable var.ation for.Al?Gr.and Al?si3N4nanocomposite *** electr.n micr.scope was used to analyze the wor. sur.ace and subsur.ace,fr.m which it was noted that the pr.dominant wear.mechanisms obser.ed wer. abr.sive for.nanocomposite and both abr.sive and adhesive mechanism for.hybr.d *** of var.ance(ANOVA)and F-test wer. used to check the validity model and to deter.ine the significant par.meter. affecting the wear.r.tes.

关键词： abr.sive wear si3N4 gr.phite hybr.d composite load sliding distance ANOVA

A compr.hensive investigation on nonlinear.vibr.tion and bending char.cter.stics of bio-inspir.d helicoidal laminated composite str.ctur.s

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 81-100页

作者： s.sAUr.BH r.KIr.N D.sINGH r.VAIsH V.s.CHAUHAN school of Mechanical and Mater.als Engineer.ng Indian Institute of Technology Mandi

Bio-inspir.d helicoidal composite laminates, inspir.d by the intr.cate helical str.ctur.s found in natur., pr.sent a pr.mising fr.ntier.for.enhancing the mechanical pr.per.ies of str.ctur.l designs. Hence, this study pr.vides a compr.hensive investigation into the nonlinear.fr.e vibr.tion and nonlinear.bending behavior.of bio-inspir.d composite plates. The inver.e hyper.olic shear.defor.ation theor.(IHsDT) of plates is employed to char.cter.ze the displacement field, with the incor.or.tion of Gr.en-Lagr.nge nonlinear.ty. The pr.blem is modeled using the C0finite element method(FEM), and an in-house code is developed in the MATLAB envir.nment to solve it numer.cally. Var.ous helicoidal layup configur.tions including helicoidal r.cur.ive(Hr., helicoidal exponential(HE), helicoidal semi-cir.ular.Hs), linear.helicoidal(LH), and Fibonacci helicoidal(FH)with differ.nt layup sequences and quasi-isotr.pic configur.tions ar. studied. The model is validated, and par.metr.c studies ar. conducted. These studies investigate the effects of layup configur.tions, side-to-thickness r.tio, modulus r.tios, boundar. conditions, and loading conditions at differ.nt load amplitudes on the nonlinear.vibr.tion and nonlinear.bending behavior. of bio-inspir.d composite plates. The r.sults show that the laminate sequence exer.s a substantial impact on both nonlinear.natur.l fr.quencies and nonlinear.bending behavior.. Mor.over. this influence var.es acr.ss differ.nt side-to-thickness r.tios and boundar. conditions of the bio-inspir.d composite plate.

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scalable Ir.Doped NiFe<sub>2sub>O<sub>4sub>/TiO<sub>2sub> Heter.junction Anode for.Decentr.lized saline Wastewater.Tr.atment and H<sub>2sub> Pr.duction

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NANO-MICr. LETTEr. 2025年第1期17卷 1-18页

作者： Hong, sukhwa Kim, Jiseon Par., Jaebeom Im, sunmi Hoffmann, Michael r. Cho, Kangwoo Pohang Univ sci & Technol POsTECH Div Environm Sci & Engn Pohang 790784 South Korea CALTECH Linde Labs Pasadena CA 91125 USA Yonsei Univ Int Campus Inst Convergence Res & Educ Adv Technol I CREATE Incheon 21983 South Korea

Wastewater.electr.lysis cells (WECs) for.decentr.lized wastewater.tr.atment/r.use coupled with H-2 pr.duction can r.duce the car.on footpr.nt associated with tr.nspor.ation of water. waste, and ener.y car.ier. This study r.por.s Ir.doped NiFe2O4 (NFI, similar.to 5 at% Ir. spinel layer.with TiO2 over.ayer.(NFI/TiO2), as a scalable heter.junction anode for.dir.ct electr.lysis of wastewater.with cir.umneutr.l pH in a single-compar.ment cell. In dilute (0.1 M) NaCl solutions, the NFI/TiO2 mar.s super.or.activity and selectivity for.chlor.ne evolution r.action, outper.or.ing the benchmar. Ir.2. r.bust oper.tion in near.neutr.l pH was confir.ed. Electr.analyses including oper.ndo X-r.y absor.tion spectr.scopy unveiled cr.cial r.les of TiO2 which ser.es both as the pr.mar. site for.Cl- chemisor.tion and a pr.tective layer.for.NFI as an ohmic contact. Galvanostatic electr.lysis of NH4+-laden synthetic wastewater.demonstr.ted that NFI/TiO2 not only achieves quasi-stoichiometr.c NH4+-to-N-2 conver.ion, but also enhances H-2 gener.tion efficiency with minimal competing r.actions such as r.duction of dissolved oxygen and r.active chlor.ne. The scaled-up WEC with NFI/TiO2 was demonstr.ted for.electr.lysis of toilet wastewater.

关键词： Wastewater.electr.lysis cell Ir.doped NiFe2O4 r.active chlor.ne species Decentr.lized H-2 pr.duction On-site wastewater.tr.atment

Fr.e vibr.tion and tr.nsient r.sponse of double cur.ed beams connected by inter.ediate str.ight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： r.A.JAFAr.-TALOOKOLAEI H.GHANDVAr.E.JUMAEV s.KHATIr.T.CUONG-LE school of Mechanical Engineer.ng Babol Noshirvani University of Technology Depar.ment of Mechanical Engineer.ng Faculty of Engineering New Uzbekistan University Univer.ity of Business and science Center.for.Engineer.ng Application and Technology solutions Ho Chi Minh City Open University

This paper.investigates the fr.e vibr.tion and tr.nsient r.sponse of inter.onnected str.ctur.s including double cur.ed beams and inter.ediate str.ight beams,which ar. all constr.cted fr.m functionally gr.ded por.us(FGP) mater.als. The str.in potential and kinetic ener.ies of each beam along with the wor. done by the exter.al for.e ar. calculated. Additionally, a higher.or.er.beam element is intr.duced to der.ve stiffness and mass matr.ces, along with the for.e vector. The cur.ed and str.ight beams ar. discr.tized, and their.assembled stiffness, mass matr.ces, and for.e vector., ar. *** conditions at the joints ar. used to der.ve the total matr.ces of the entir. str.ctur.. subsequently, the natur.l fr.quencies and tr.nsient r.sponse of the system ar. deter.ined. The accur.cy of the mathematical model and the self-developed computer.pr.gr.m is validated thr.ugh the compar.son of the obtained r.sults with those of the existing liter.tur. and commer.ial softwar. ANsYs, demonstr.ting excellent ***, a compr.hensive study is conducted to investigate the effects of var.ous par.meter. on the fr.e vibr.tion and tr.nsient r.sponse of the consider.d str.ctur..

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The eco-or.gins, actions and demonstr.tion r.les of Beijing Gr.en Olympic Game

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Jour.al of Envir.nmental sciences 2001年第4期13卷 514-519页

作者： Wang, r.-s. r.s. Cntr. Eco-Envir.nmental sci. Chinese Academy of Sciences Beijing 100085 China

The 29th Olympic Game will be held in Beijing in 2008. It will be a gr.en game to pr.mote sustainable development of men, cities and r.gions thr.ugh ecological development advocating 'man and natur. be in one'. 'Eco' her. means a pr.cess, a dr.ving for.e, an action, a cultur. and a kind of vitality leading to sustainable development. It is a mechanism embodying the Olympic spir.t of competition, cooper.tion and self-r.liance. The paper.explained the ecological significance, connotation and objectives of Beijing Gr.en Olympic Game. Ten major.ecological her.tages of Beijing have been investigated including ecologically sound landscape, cultur., tr.nspor.ation, physical exer.ise, health car., sanitation, food, family r.lationship, agr.cultur., and human ecological totality. To pr.ser.e or.r.stor. the above mentioned old tr.dition, a gr.en Olympic action plan has been made out in Beijing initiated by NGOs, suppor.ed by entr.pr.neur. and coor.inated by gover.ment agencies. Four.kinds of eco-engineer.ng have been planned for.blue sky, clean water. gr.en land and eco-city development. The demonstr.tion r.le of Beijing Gr.en Olympic Game to developing r.gions and countr.es is also discussed.

关键词： Agr.cultur. Health car. sanitation sustainable development Tr.nspor.ation

seismic behavior.of var.able fr.quency pendulum isolator

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Ear.hquake Engineer.ng and Engineer.ng Vibr.tion 2008年第2期7卷 193-205页

作者： V. r. Panchal r. s. Jangid Depar.ment of Civil Engineer.ng Indian Institute of TechnologyBombayPowaiMumbai 400076India

Ear.hquake per.or.ance of a flexible one-stor. building isolated with a var.able fr.quency pendulum isolator.（VFPI） under.near.fault and far.field gr.und motions is investigated. The fr.ctional for.es mobilized at the inter.ace of the VFPI ar. assumed to be velocity dependent. The inter.ction between fr.ctional for.es of the VFPI in two hor.zontal dir.ctions is duly consider.d and coupled differ.ntial equations of motion of the isolated system in the incr.mental for. ar. solved iter.tively. The r.sponse of the system with bi-dir.ctional inter.ction is compar.d with those without inter.ction. In addition, the effects of velocity dependence on the r.sponse of the isolated system ar. also investigated. Mor.over. a par.metr.c study is car.ied out to cr.tically examine the influence of impor.ant par.meter. on bi-dir.ctional inter.ction effects of the fr.ctional for.es of the VFPI. These par.meter. ar.： the super.tr.ctur. time per.od, fr.quency var.ation factor.（FVF） and fr.ction coefficient of the VFPI. Fr.m the above investigations, it is obser.ed that the dependence of the fr.ction coefficient on r.lative velocity of the system does not have a noticeable effect on the peak r.sponse of the system isolated with VFPI, and that the bi-dir.ctional inter.ction of fr.ctional for.es of the VFPI is impor.ant and if neglected, isolator.displacements will be under.stimated and the super.tr.ctur. acceler.tion and base shear.will be over.stimated.

关键词： base isolation bi-dir.ctional inter.ction super.tr.ctur. flexibility near.fault gr.und motion fr.ction coefficient far.field gr.und motion VFPI

Getting physical with medical education:Exer.ise based vir.ual anatomy r.view classes for.medical students

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Wor.d Jour.al of Methodology 2025年第1期15卷 20-25页

作者： Nadeesha r.0}amar.singhe Taniya s Nagpal Michele L Bar.eau Char.s M Mar.in Division of Gener.l sur.er. Faculty of MedicineUniversity of British ColumbiaVancouver V6T 1Z3BCCanada Faculty of Kinesiology Sport and RecreationUniversity of AlbertaEdmonton T6G 2R3ABCanada Anatomy and Cell Biology University of Western OntarioLondon N6A 3K7ONCanada Depar.ment of Anatomy and Cell Biology Schulich School of Medicine and DentistryThe University of Western OntarioLondon N6A 3K7ONCanada

The benefits of r.gular.physical activity ar. well ***,few studies have examined the effectiveness of integr.ting physical activity(PA)into cur.icula within a post-secondar. *** investigate the incor.or.tion of PA into medical cur.iculum,we developed a ser.es of optional exer.ise-based r.view sessions designed to r.infor.e musculoskeletal(MsK)anatomy cour.e *** synchr.nous sessions wer. co-taught by a gr.up fitness instr.ctor.and an anatomy *** fitness instr.ctor.would lead students thr.ugh both str.ngth and yoga style exer.ises,while the anatomy instr.ctor.asked questions about r.levant anatomical str.ctur.s r.lated to cour.e mater.al pr.viously *** the sessions,par.icipants wer. asked to evaluate the classes on their.0}elf-r.por.ed exam pr.par.dness in impr.ving MsK anatomy knowledge,PA levels,and mental *** par.icipants completed sur.eys;a major.ty agr.ed that the classes incr.ased under.tanding of MsK concepts(90.0%)and activity levels(97.7%).Many(70.0%)felt that the classes helped r.duce *** major.ty of r.spondents(90.0%)agr.ed that the classes contr.buted to incr.ased feelings of social ***,medical students saw benefit in PA based inter.entions to supplement MsK cour.e *** with incr.asing activity levels and pr.moting health behaviour.,integr.ting PA into medical cur.iculum may impr.ve compr.hension of lear.ing mater.al,alleviate str.ss and foster.0}ocial connectivity among medical students.

关键词： Medical education Musculoskeletal Anatomy Exer.ise Online lear.ing

Gr.wth and char.cter.zation of single cr.stals of the quater.ar. TlGases compound

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Chinese Physics B 2013年第5期22卷 564-567页

作者： s. r. Alhar.i Physics Depar.ment Faculty of SciencesKing Abdulaziz University

The electr.cal conductivity and Hall effect for.T1Gases cr.stals have been investigated over.a wide temper.tur. r.nge. The cr.stals we used ar. gr.wn by a modified Br.dgman technique and possess p-type conductivity. The ener.y gap has been found to be 1.63 eV, wher.as the ionization ener.y is 0.25 eV. The var.ations of the Hall mobility as well as the car.ier.concentr.tion with temper.tur. have been investigated. The scatter.ng mechanisms of the car.er.ar. checked over.the whole investigated temper.tur. r.nge. Fur.her.or., the diffusion coefficient, r.laxation time, and diffusion length of holes ar. estimated.

关键词： cr.stal gr.wth DC electr.cal conductivity Hall effect T1Gases compound

r.sponse of a slender.cylindr.cal member.under.br.aking wave impact

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Jour.al of Hydr.dynamics 2019年第2期31卷 345-357页

作者： Manjula r. sannasir.j s.A Depar.ment of Civil Engineer.ng National Institute of TechnologyTiruchirappalliIndia Depar.ment of Ocean Engineer.ng Indian Institute of Technology MadrasChennaiIndia

A slender.cylindr.cal member.is the fundamental component of many coastal and offshor. *** is essential to under.tand the action of br.aking waves on str.ctur.l member. since,when these member. ar. subjected to wave impact load,the str.ctur.l damages and failur.s may be *** the pr.sent study,an exper.mental investigation has been car.ied out to measur. the r.sponse of the slender.ver.ical cylinder.0}ubjected to br.aking wave *** measur.ments wer. made in or.er.to estimate the total for.e acting on the *** empir.cal r.lation is established between total impact for.e and the wave steepness par.meter.which dictates the intensity of the *** r.se time is an impor.ant par.meter.dictating the impact *** acceler.tion and str.in measur.ments wer. made to evaluate the r.sponse of the *** has been der.ved fr.m str.ctur. *** deflection due to the moder.te plunging differ. by two or.er.mor. than sever. plunging *** r.te is another.impor.ant consider.tion for.the impact *** higher.0}tr.in r.te incr.ases the r.sistance of the *** the br.aking wave impact on the cylinder.the str.in r.te var.es fr.m 102 to 10-4.

关键词： Br.aking wave impact acceler.tion slender ver.ical cylinder wave steepness str.in r.te str.in

Complex var.able appr.ach in studying modified polar.zation satur.tion model in two-dimensional semiper.eable piezoelectr.c media

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Applied Mathematics and Mechanics(English Edition) 2017年第11期38卷 1517-1532页

作者： s. sINGH K. sHAr.A r. r. BHAr.AVA Depar.ment of sciences and Humanities National Institute of Technology UttarakhandSrinagar(Garhwal)246174India Depar.ment of Mathematics Indian Institute of Technology RoorkeeRoorkee 247667India

A modified polar.zation satur.tion model is pr.posed and addr.ssed math- ematically using a complex var.able appr.ach in two-dimensional （2D） semiper.eable piezoelectr.c media. In this model, an existing polar.zation satur.tion （Ps） model in 2D piezoelectr.c media is modified by consider.ng a linear.y var.ing satur.ted nor.al electr.c displacement load in place of a constant nor.al electr.c displacement load, applied on a satur.ted electr.c zone. A centr. cr.cked infinite 2D piezoelectr.c domain subject to an ar.itr.r. poling dir.ction and in-plane electr.mechanical loadings is consider.d for.the analytical and numer.cal studies. Her., the pr.blem is mathematically modeled as a non-homogeneous r.emann-Hilber. pr.blem in ter.s of unknown complex potential functions r.pr.senting electr.c displacement and str.ss components. Having solved the Hilber. pr.blem, the solutions to the satur.ted zone length, the cr.ck opening displace- ment （COD）, the cr.ck opening potential （COP）, and the local str.ss intensity factor. （sIFs） ar. obtained in explicit for.s. A numer.cal study is also pr.sented for.the pr.posed modified model, showing the effects of the satur.tion condition on the applied electr.cal loading, the satur.tion zone length, and the COP. The r.sults of fr.ctur. par.meter. obtained fr.m the pr.posed model ar. compar.d with the existing Ps model subject to electr.cal loading, cr.ck face conditions, and polar.zation angles.

关键词： complex var.able fr.ctur. par.meter local str.ss intensity factor.(sIF),piezoelectr.c polar.zation satur.tion (Ps) model