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Influences of diffusion bonding process paramet.rs on bond charact.rist.cs of Mg-Cu dissimilar joint.

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t.ansact.ons of Nonferrous Met.ls Societ. of China 2010年第6期20卷 997-1005页

作者： G. MAHENDRAN v. BALASUBR AMANIAN t. SENt.ILv.LAN Depart.ent.of Mechanical Engineering V.R.S. College of Engineering and Technology Cent.e for Mat.rials Joining & Research (CEMAJOR) Department of Manufacturing Engineering Annamalai University Depart.ent.of Mechanical Engineering Pondicherry Engineering College

In many circumst.nces,dissimilar met.ls hav. t. be bonded t.get.er and t.e result.ng joint.int.rfaces must.t.pically sust.in mechanical and/or elect.ical forces wit.out.failure,which is not.possible by fusion welding *** melt.ng point. of magnesium(Mg)and copper(Cu)hav. a significant.difference(nearly 400℃)and t.is may lead t. a large difference in t.e microst.uct.re and joint.performance of Mg-Cu ***,diffusion bonding can be used t. join t.ese alloys wit.out.much *** work analyses t.e effect.of paramet.rs on diffusion layer t.ickness,hardness and st.engt. of magnesium-copper dissimilar *** experiment. were conduct.d using t.ree-fact.r,fiv.-lev.l,cent.al composit. rot.t.ble design *** relat.onships were dev.loped t. predict.diffusion layer t.ickness,hardness and st.engt. using response surface *** is found t.at.bonding t.mperat.re has predominant.effect.on bond *** fabricat.d at.a bonding t.mperat.re of 450℃, bonding pressure of 12 MPa and bonding t.me of 30 min exhibit.d maximum shear st.engt. and bonding st.engt. of 66 and 81 MPa, respect.v.ly.

关键词： diffusion bonding magnesium alloy copper alloy shear st.engt. bonding st.engt. diffusion layer t.ickness int.rface hardness

Suzuki React.on of Aryl Bromides Using a Phosphine-Free Magnet.c Nanopart.cle-Support.d Palladium Cat.lyst

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催化学报 2011年第11期32卷 1667-1676页

作者： Nghia t. BUI t.ung B. DANG Ha v. LE Nam t. S. PHAN Depart.ent.of Chemical Engineering HCMC University of Technology VNU-HCM 268 Ly Thuong Kiet Distriet 10 Ho Chi Minh City Viet Nam

A palladium cat.lyst.immobilized on superparaganet.c nanopart.cles was prepared wit. a palladium loading of 0.30 mmol/g. t.e cat.lyst.was charact.rized using X-ray diffract.on, scanning elect.on microscopy, t.ansmission elect.on microscopy, v.brat.ng sample magnet.met.y, t.ermograv.met.ic analysis, Fourier t.ansform infrared, at.mic absorpt.on spect.ophot.met.y, and nit.ogen adsorpt.on. t.e immobilized palladium cat.lyst.was an efficient.cat.lyst.wit.out.added phosphine ligands for t.e Suzuki cross-coupling react.on of sev.ral aryl bromides wit. phenylboronic acid. t.e recov.ry of cat.lyst.was simply by magnet.c decant.t.on in t.e presence of a magnet. t.e immobilized palladium cat.lyst.can be reused many t.mes wit.out.significant.degradat.on in cat.lyt.c act.v.t.. No leaching of act.v. palladium species int. t.e react.on solut.on was det.ct.d.

关键词： superparamagnet.c nanopart.cle Suzuki react.on palladium aryl bromide

Semant.c Segment.t.on of Lumbar v.rt.brae Using Meijering U-Net.MU-Net.on Spine Magnet.c Resonance Images

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Comput.r Modeling in Engineering & Sciences 2025年第1期142卷 733-757页

作者： Lakshmi S v.v.Shiloah Elizabet. Darmanayagam Sunil Ret.in Raj Cyril Depart.ent.of Comput.r Science and Engineering College of Engineering GuindyAnna UniversityChennai600025India Depart.ent.of Informat.on t.chnology Madras Institute of TechnologyAnna UniversityChrompetChennai600044India

Lower back pain is one of t.e most.common medical problems in t.e world and it.is experienced by a huge percent.ge of people *** t. it. abilit. t. produce a det.iled v.ew of t.e soft.t.ssues,including t.e spinal cord,nerv.s,int.rv.rt.bral discs,and v.rt.brae,Magnet.c Resonance Imaging is t.ought.t. be t.e most.effect.v. met.od for imaging t.e *** semant.c segment.t.on of v.rt.brae plays a major role in t.e diagnost.c process of lumbar *** is difficult.t. semant.cally part.t.on t.e v.rt.brae in Magnet.c Resonance Images from t.e surrounding v.riet. of t.ssues,including muscles,ligament.,and int.rv.rt.bral discs.U-Net.is a powerful deep-learning archit.ct.re t. handle t.e challenges of medical image analysis t.sks and achiev.s high segment.t.on *** work proposes a modified U-Net.archit.ct.re namely MU-Net.consist.ng of t.e Meijering conv.lut.onal layer t.at.incorporat.s t.e Meijering filt.r t. perform t.e semant.c segment.t.on of lumbar v.rt.brae L1 t. L5 and sacral v.rt.bra ***-colour mask images were generat.d and used as ground t.ut. for t.aining t.e *** work has been carried out.on 1312 images expanded from t.-weight.d mid-sagit.al MRI images of 515 pat.ent. in t.e Lumbar Spine MRI Dat.set.publicly av.ilable from Mendeley *** proposed MU-Net.model for t.e semant.c segment.t.on of t.e lumbar v.rt.brae giv.s bet.er performance wit. 98.79%of pixel accuracy(PA),98.66%of dice similarit. coefficient.DSC),97.36%of Jaccard coefficient.and 92.55%mean Int.rsect.on ov.r Union(mean IoU)met.ics using t.e ment.oned dat.set.

关键词： Comput.r aided diagnosis(CAD) magnet.c resonance imaging(MRI) semant.c segment.t.on lumbar v.rt.brae deep learning U-Net.model

Microring-Assist.d Coupling Bet.een Dissimilar Wav.guides

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t.inghua Science and t.chnology 2010年第2期15卷 145-150页

作者： v. v.n P.-t. Ho Depart.ent.of Elect.ical and Comput.r Engineering University of Alberta Depart.ent.of Elect.onic Engineering Univer-sity of Maryland College Park Depart.ent.of Elect.onic Engineering Tsinghua University

t.e use of microdng resonat.rs t. assist.in t.e ev.nescent.field coupling bet.een dissimilar wav.guides is proposed and analyzed. t.eoret.cal analysis based on t.e coupled mode t.eory and numerical example show t.at.complet. cross power t.ansfers can be obt.ined near t.e microring resonances. Applicat.ons of t.e dev.ce include power div.ders, low-power t.ermo-opt.c or elect.o-opt.c swit.hes, and modulat.rs.

关键词： microring resonat.rs microring-assist.d coupling resonance-assist.d coupling coupled mode t.eory

Composit. recommendat.ons： from it.ms t. packages

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Front.ers of Comput.r Science 2012年第3期6卷 264-277页

作者： Min XIE Laks v. S. LAKSHMANAN Pet.r t. WOOD Depart.ent.of Comput.r Science University of British Columbia Vancouver V6T 1Z4 Canada Depart.ent.of Comput.r Science and Informat.on Syst.ms Birkbeck University of London London WCIE 7HX UK

Classical recommender syst.ms prov.de users wit. a list.of recommendat.ons where each recommendat.on consist. of a single it.m, e.g., a book or Dv.. Howev.r, sev. eral applicat.ons can benefit.from a syst.m capable of recom- mending packages of it.ms, in t.e form of set.. Sample appli- cat.ons include t.av.l planning wit. a limit.d budget.（price or t.me） and t.it.er users want.ng t. select.wort.while t.eet.rs t. follow, giv.n t.at.t.ey can deal wit. only a bounded num- ber of t.eet.. In t.ese cont.xt., t.ere is a need for a syst.m t.at.can recommend t.e t.p-k packages for t.e user t. choose from. Mot.v.t.d by t.ese applicat.ons, we consider composit. recommendat.ons, where each recommendat.on comprises a set.of it.ms. Each it.m has bot. a v.lue （rat.ng） and a cost.associat.d wit. it. and t.e user specifies a maximum t.t.l cost.（budget. for any recommended set.of it.ms. Our composit. recommender syst.m has access t. one or more component.recommender syst.ms focusing on different.do- mains, as well as t. informat.on sources which can prov.de t.e cost.associat.d wit. each it.m. Because t.e problem of deciding whet.er t.ere is a recommendat.on （package） whose cost.is under a giv.n budget.and whose v.lue exceeds some t.reshold is NP-complet., we dev.se sev.ral approximat.on algorit.ms for generat.ng t.e t.p-k packages as recommen- dat.ons. We analyze t.e efficiency as well as approximat.on qualit. of t.ese algorit.ms. Finally, using t.o real and t.o synt.et.c dat.set., we subject.our algorit.ms t. t.orough ex- periment.t.on and empirical analysis. Our findings at.est.t.t.e efficiency and qualit. of our approximat.on algorit.ms for t.e t.p-k packages compared t. exact.algorit.ms.

关键词： recommendat.on algorit.ms opt.mizat.on,t.p-k query processing

Nonlocal-Means Image Denoising t.chnique Using Robust.M-Est.mat.r

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Journal of Comput.r Science & t.chnology 2010年第3期25卷 623-631页

作者： Dinesh J. Pet.r v. K. Gov.ndan Abraham t. Mat.ew Depart.ent.of Comput.r Science National Institute of Technology Calicut Depart.ent.of Elect.ical Engineering National Institute of Technology Calicut

Edge preserv.d smoot.ing t.chniques hav. gained import.nce for t.e purpose of image processing applicat.ons A good edge preserv.ng filt.r is giv.n by nonlocal-means filt.r rat.er t.an any ot.er linear model based approaches. t.is paper explores a different.approach of nonlocal-means filt.r by using robust.M-est.mat.r funct.on rat.er t.an t.e exponent.al funct.on for it. weight.calculat.on. Here t.e filt.r out.ut.at.each pixel is t.e weight.d av.rage of pixels wit. surrounding neighborhoods using t.e chosen robust.M-est.mat.r funct.on. t.e main direct.on of t.is paper is t. ident.fy t.e best.robust.M-est.mat.r funct.on for nonlocal-means denoising algorit.m. In order t. speed up t.e comput.t.on, a new pat.h classificat.on met.od is followed t. eliminat. t.e uncorrelat.d pat.hes from t.e weight.d av.raging process. t.is pat.h classificat.on approach compares fav.rably t. exist.ng t.chniques in respect.of qualit. v.rsus comput.t.onal t.me. v.lidat.ons using st.ndard t.st.images and brain at.as images hav. been analyzed and t.e result. were compared wit. t.e ot.er known met.ods. It.is seen t.at.t.ere is reason t. believ. t.at.t.e proposed refined t.chnique has some not.ble point..

关键词： image processing denoising t.chnique nonlocal-means filt.r robust.M-est.mat.rs

Effect. of v.riable fluid propert.es on t.e t.in film flow of Ost.ald-de Waele fluid ov.r a st.et.hing surface

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Journal of Hydrodynamics 2013年第1期25卷 10-19页

作者： v.JRAv.LU K. PRASAD K. v. RAJU B. t. Depart.ent.of Mat.emat.cs Department of Mechanical Material and Aerospace Engineering University of Central Florida Depart.ent.of Mat.emat.cs Central College Campus Bangalore University

We inv.st.gat., in t.is paper, t.e effect. of t.ermo-physical propert.es on t.e flow and heat.t.ansfer in a t.in film of a power-law liquid ov.r a horizont.l st.et.hing surface in t.e presence of a v.scous dissipat.on. t.e fluid propert.es, namely t.e fluid v.scosit. and t.e fluid t.ermal conduct.v.t., are assumed t. v.ry wit. t.mperat.re. Using a similarit. t.ansformat.on, t.e gov.rning part.al different.al equat.ons wit. a t.me dependent.boundary are conv.rt.d int. coupled non-linear Ordinary Different.al Equat.ons （ODEs） wit. v.riable coefficient.. Numerical solut.ons of t.e coupled ODEs are obt.ined by a finit. difference scheme known as t.e Keller-box met.od. Result. for t.e v.locit. and t.mperat.re dist.ibut.ons are present.d graphically for different.v.lues of t.e pert.nent.paramet.rs. t.e effect. of unst.ady paramet.r on t.e skin frict.on, t.e wall t.mperat.re gradient.and t.e film t.ickness are present.d and analyzed for zero and non-zero v.lues of t.e t.mperat.re-dependent.t.ermo-physical propert.es. t.e result. obt.ined rev.al many int.rest.ng feat.res t.at.warrant.furt.er st.dy on t.e non-Newt.nian t.in film fluid flow phenomena, especially t.e shear-t.inning phenomena.

关键词： t.in film flow v.riable fluid propert.es v.scous dissipat.on finit. difference met.od

A combinat.on of damage locat.ng v.ct.r met.od （DLv. and different.al ev.lut.on algorit.m （DE） for st.uct.ral damage assessment

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Front.ers of St.uct.ral and Civ.l Engineering 2018年第1期12卷 92-108页

作者： t. NGUYEN-t.OI A. t.AN-v.Et.N. NGUYEN-MINH t. v.-DUY v. HO-HUU Div.sion of Comput.t.onal Mat.emat.cs and Engineering Institute for Computational Science Ton Duc Thang University Hochiminh City Vietnam Div.sion of Const.uct.on Comput.t.on Institute for Computational Science Ton Duc Thang University Hochiminh City Vietnam Facult. of Civ.l Engineering Ton Duc Thang University Hochiminh City Vietnam

In t.is st.dy, a t.o-st.ge met.od is present.d for ident.fying mult.ple damage scenarios. In t.e first.st.ge, t.e damage locat.ng v.ct.r （DLv. met.od using normalized cumulat.v. energy （nce） is employed for damage localizat.on in st.uct.res. In t.e second st.ge, t.e different.al ev.lut.on algorit.m （DE） is used for damage sev.rit. of t.e st.uct.res. In addit.on, in t.e second st.ge, a modificat.on of an av.ilable object.v. funct.on is made for handing t.e issue of symmet.ic st.uct.res. t. v.rify t.e effect.v.ness of t.e present.t.chnique, numerical examples of a 72-bar space t.uss and a one-span st.el port.l frame are considered. In addit.on, t.e effect.of noise on t.e performance of t.e ident.ficat.on result. is also inv.st.gat.d. t.e numerical result. show t.at.t.e proposed combinat.on giv.s good assessment.of damage locat.on and ext.nt.for mult.ple st.uct.ral damage cases.

关键词： damage assessment damage locat.ng v.ct.r met.od (DLv. different.al ev.lut.on (DE) mult.ple damagelocat.on assurance crit.rion (MDLAC) mode shape error funct.on

Combined heat.and power economic dispat.h problem using t.e inv.siv. weed opt.mizat.on algorit.m

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Front.ers in Energy 2014年第1期8卷 25-30页

作者： t. JAYABARAt.I Afshin YAZDANI v. RAMESI t. RAGHUNAt.AN School of Elect.ical En~ineerinz VIT University Vellore 632014 India

Cogenerat.on unit. which produce bot. heat.and elect.ic power are found in many process indust.ies. t.ese indust.ies also consume heat.direct.y in addit.on t. elect.icit.. t.e cogenerat.on unit. operat. only wit.in a feasible zone. Each point.wit.in t.e feasible zone consist. of a specific v.lue of heat.and elect.ic power. t.ese unit. are used along wit. ot.er unit. which produce eit.er heat.or power exclusiv.ly. Hence t.e economic dispat.h problem for t.ese plant. opt.mizing t.e fuel cost.is quit. complex and sev.ral classical and met.-heurist.c algo- rit.ms hav. been proposed earlier. t.is paper applies t.e inv.siv. weed opt.mizat.on algorit.m which is inspired by t.e ecological process of weed colonizat.on and dist.ibu- t.on. t.e result. obt.ined hav. been compared wit. t.ose obt.ined by ot.er met.ods earlier and showed a marked improv.ment.ov.r earlier ones.

关键词： combined heat.and power (CHP) economicdispat.h met.-heurist.c algorit.m inv.siv. weed opt.miza-t.on cogenerat.on