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响应面方法在奥氏体不锈钢与铜合金异种材料摩擦焊接头的抗拉强度最大化和界面硬度最小化中的应用(英文)

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t.ansact.ons of Nonferrous Met.ls Societ. of China 2013年第8期23卷 2250-2259页

作者： G. VAIRAMANI t. senthil kumar S. MALARVIZHI V. BALASUBRAMANIAN Depart.ent.of Mechanical Engineering Seshasayee Institute of Technology Depart.ent.of Mechanical Engineering Anna University of ChennaiTiruchirappalli Campus Cent.e for Mat.rials Joining & Research (CEMAJOR) Department of Manufacturing EngineeringAnnamalai University

在奥氏体不锈钢与铜合金异种材料摩擦焊接过程中,采用响应面方法优化摩擦焊接工艺参数,以获得抗拉强度最大和界面硬度最小的焊接接头。采用三因素、五水平中心复合正交矩阵来确定实验条件。得到20个焊接接头,测定了焊接接头的抗拉强度... 详细信息

在奥氏体不锈钢与铜合金异种材料摩擦焊接过程中,采用响应面方法优化摩擦焊接工艺参数,以获得抗拉强度最大和界面硬度最小的焊接接头。采用三因素、五水平中心复合正交矩阵来确定实验条件。得到20个焊接接头,测定了焊接接头的抗拉强度和界面硬度。采用方差分析(ANOVA)方法来确定起显著作用的、主要的及相互作用的参数,使用回归分析得到经验关系模型。用设计专家软件构造响应图和等高线图来优化摩擦焊接工艺参数。用得到的经验关系模型可以有效地预测焊接接头的抗拉强度和界面硬度,其置信水平达95%。从形成的等高线图可以得到所需的摩擦焊接的最佳条件。

关键词：摩擦焊接奥氏体不锈钢铜合金抗拉强度界面硬度响应面方法

Opt.mizing pulsed current.gas t.ngst.n arc welding paramet.rs of AA6061 aluminium alloy using Hooke and Jeeves algorit.m

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中国有色金属学会会刊：英文版 2008年第5期18卷 1028-1036页

作者： S.BABU t.senthil kumar V.BALASUBRAMANIAN Cent.e for Mat.rials Joining Research (CEMAJOR) Department of Manufacturing EngineeringAnnamalai UniversityAnnamalai Nagar-608 002Tamil NaduIndia Depart.ent.of Aut.mobile t.chnology Bharathidasan Institute of TechnologyAnna UniversityTiruchirappalli-620 016Tamil NaduIndia

t.ough t.e preferred welding process t. weld aluminium alloy is frequent.y const.nt.current.gas t.ngst.n arc welding (CCGt.W),it.result.d in grain coarsening at.t.e fusion zone and heat.affect.d zone(HAZ).Hence,pulsed current.gas t.ngst.n arc welding(PCGt.W) was performed,t. yield finer fusion zone grains,which leads t. higher st.engt. of AA6061 (Al-Mg-Si) aluminium alloy *** order t. det.rmine t.e most.influent.al cont.ol fact.rs which will yield minimum fusion zone grain size and maximum t.nsile st.engt. of t.e joint.,t.e t.adit.onal Hooke and Jeeves pat.ern search met.od was *** experiment. were carried out.based on cent.al composit. design wit. 31 runs and an algorit.m was developed t. opt.mize t.e fusion zone grain size and t.e t.nsile st.engt. of pulsed current.gas t.ngst.n arc welded AA6061 aluminium alloy *** result. indicat. t.at.t.e peak current.(Ip) and base current.(IB) are t.e most.significant.paramet.rs,t. decide t.e fusion zone grain size and t.e t.nsile st.engt. of t.e AA6061 aluminum alloy joint..

关键词：脉冲电流钨电极惰性气体保护焊铝合金颗粒尺寸

Synt.esis,charact.rizat.on and sint.ring behavior influencing mechanical,t.ermal and physical propert.es of pure cordierit. and cordierit.-ceria

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Journal of Advanced Ceramics 2015年第1期4卷 22-30页

作者： Marikkannan senthil kumar Ayyasamy ELAYA PERUMAL t.R.VIJAYARAM School of Mechanical Building and Sciences VIT UniversityChennai-600127Tamil Nadu StateIndia Depart.ent.of Mechanical Engineering Anna UniversityChennai-600025Tamil Nadu StateIndia

t.e st.dy of cordierit. ceramic is t.e need of t.e hour in present.t.chnological world for various advanced engineering ***,which has relat.vely poor mechanical propert.es,has induced t.e use of various dopant. t. st.dy t.e improvement.in mechanical *** of seeking new mat.rials wit. good mechanical propert.es has revived t.e research on ceria doped *** research conduct.d on pure cordierit. and ceria doped cordierit. ceramics has invest.gat.d t.e result. of charact.rizat.on and st.died t.eir *** cordierit. and cordierit.-ceria(CeO_(2))composit. ceramics synt.esized for various st.ichiomet.ic composit.on(5-20 wt.)were compact.d at.240 MPa and sint.red bet.een 600℃and 1350℃for 3 *** charact.rizat.on t.chniques used in t.is st.dy were X-ray diffract.on(XRD),t.ermogravimet.ic(t.)analysis and Fourier t.ansform infrared(Ft.R).t.e densit. was calculat.d using t.e Archimedes *** of t.e ceria addit.on on cordierit.’s mechanical propert.es such as hardness,flexural st.engt. and fract.re t.ughness and on t.ermal propert.es as t.ermal expansion was *** result. confirmed t.e presence of cordierit. and ceria in t.e samples heat.t.eat.d at.1350℃.Result. of Ft.R and t. analyses revealed t.e format.on of cordierit. and t.e effect.of ceria *** mechanical propert.es st.died were found t. be encouraging and confirmed t.e suit.bilit. of cordierit.-ceria as an alt.rnat. mat.rial for cordierit..

关键词： cordierit. ceria(CeO_(2)) t.mperat.re phase t.ansformat.on propert.es

Growt. of ZnSe∶Mn Nanocryst.ls from Vapour Phase

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Journal of Rare Eart.s 2006年第Z1期24卷 111-114页

作者： O senthil kumar K Balkis Ameen S Soundeswaran t.Rajasekharan R Dhanasekaran Cryst.l Growt. Cent.e Anna University Chennai-600 025 India Defence Metallurgical Research Laboratory Hyderabad-500 058 India Crystal Growth Centre Anna University Chennai-600 025 India Defence Metallurgical Research Laboratory Hyderabad-500 058 India Crystal Growth Centre Anna University Chennai-600 025 India

ZnSe∶Mn nanocryst.ls were grown by chemical vapour t.ansport.met.od using t.e mat.ix of SiO2 aerogels. t.e cubic st.uct.re of t.e nanocryst.ls was confirmed by powder X-ray diffract.on (XRD) and elect.on diffract.on (ED) st.dies. t.e size of t.e cryst.ls was observed using t.ansmission elect.on microscope (t.M). t.e oxidat.on st.t. of Mn in ZnSe nanocryst.l was found using elect.on spin resonance (ESR) spect.um. t.e room t.mperat.re luminescence measurement. show t.e peaks corresponding t. bot. bandgap of t.e mat.rial and Mn in ZnSe.

关键词： Ⅱ-Ⅵ semiconduct.rs nanocryst.lline mat.rials elect.on spin resonance

Effect.of Pulsed Current.t.G Welding Paramet.rs on Pit.ing Corrosion Behaviour of AA6061 Aluminium Alloy

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Journal of Mat.rials Science & t.chnology 2007年第2期23卷 223-229页

作者： t.senthil kumar V.Balasubramanian M.Y.Sanavullah S.Babu Depart.ent.of Aut.mobile t.chnology Bharathidasan UniversityTiruchirappalli 620 024India Depart.ent.of Manufact.ring Engineering Annamalai UniversityAnnamalainagar 608 002India Principal V.M.K.V.Engineering CollegeSalem 636 308India

Medium st.engt. aluminium alloy （Al-Mg-Si alloy） has gat.ered wide accept.nce in t.e fabricat.on of light.weight.st.uct.res requiring a high st.engt.-t. weight.rat.o, such as t.ansport.ble bridge girders, milit.ry vehicles, road t.nkers and railway t.ansport.syst.ms. t.e preferred welding process for aluminium alloy is frequent.y t.G （t.ngst.n inert.gas） welding due t. it. comparat.vely easier applicabilit. and bet.er *** t.e case of single pass t.G welding of t.inner sect.on of t.is alloy, t.e pulsed current.has been found beneficial due t. it. advant.ges over t.e convent.onal cont.nuous current.process. t.e use of pulsed current.paramet.rs has been found t. improve t.e mechanical propert.es of t.e welds compared t. t.ose of cont.nuous current.welds of t.is alloy due t. grain refinement.occurring in t.e fusion zone. A mat.emat.cal model has been developed t. predict.pit.ing corrosion pot.nt.al of pulsed current.t.G welded AA6061 aluminium *** experiment.l design has been used t. opt.mize t.e experiment.l condit.ons. Analysis of variance t.chnique has been used t. find out.t.e significant.pulsed current.paramet.rs. Regression analysis has been used t. develop t.e model. Using t.e developed model pit.ing corrosion pot.nt.al values have been est.mat.d for different.combinat.ons of pulsed current.paramet.rs and t.e result. are analyzed in det.il.

关键词： Pulsed current t.ngst.n inert.gas welding Medium st.engt. aluminium alloy Pit.ing corrosion Design of experiment. Analysis of variance

Memory and machine at.ribut.s-based profiling and ellipt.c curve crypt.graphy-based mult.-level aut.ent.cat.on for t.e securit. of Int.rnet.of t.ings

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Int.rnat.onal Journal of Int.lligent.Comput.ng and Cybernet.cs 2017年第2期10卷 241-256页

作者： Vivek V.Jog senthil Murugan,t. Depart.ent.of Comput.r Science and Engineering Vel Tech Dr.RR&Dr.SR Technical UniversityChennaiIndia

Purpose-Due t. t.e connect.vit. of t.e mult.ple devices and t.e syst.ms on t.e same net.ork,rapid development.has become possible in Int.rnet.of t.ings(Iot.)for t.e last.***,Iot.is most.y affect.d wit. severe securit. challenges due t. t.e pot.nt.al vulnerabilit.es happened t.rough t.e mult.ple connect.vit. of sensors,devices and *** order t. handle t.e securit. challenges,lit.rat.re present. a handful of securit. prot.cols for *** purpose of t.is paper is t. present.a t.reat.profiling and ellipt.c curve crypt.graphy(ECC)-based mut.al and mult.-level aut.ent.cat.on for t.e securit. of *** work cont.ins t.o securit. at.ribut.s like memory and machine-relat.d at.ribut.s for maint.ining t.e profile ***,t.e profile t.ble st.res t.e value aft.r encrypt.ng t.e value wit. ECC t. avoid st.rage resilience using t.e proposed ***,t.ree ent.t.es like,Iot.device,server and aut.orizat.on cent.e(AC)performs t.e verificat.on based on seven levels mut.ally t. provide t.e resilience against.most.of t.e widely accept.d ***,DPWSim is ut.lized for simulat.on of Iot.and verificat.on of proposed prot.col t. show t.at.t.e prot.col is secure against.passive and act.ve ***/met.odology/approach-In t.is work,t.e aut.ors have present.d a t.reat.profiling and ECC-based mut.al and mult.-level aut.ent.cat.on for t.e securit. of *** work cont.ins t.o securit. at.ribut.s like memory and machine-relat.d at.ribut.s for maint.ining t.e profile ***,t.e profile t.ble st.res t.e value aft.r encrypt.ng t.e value wit. ECC t. avoid st.rage resilience using t.e proposed ***,t.ree ent.t.es like,Iot.device,server and AC performs t.e verificat.on based on seven levels mut.ally t. provide t.e resilience against.most.of t.e widely accept.d ***-DPWSim is ut.lized for simulat.on of Iot.and verificat.on of t.e proposed prot.col t. show t.at.t.is prot.col is secure against.passive and act.ve ***,at

关键词： Securit. Aut.ent.cat.on Int.rnet.of t.ings(Iot. Manufact.ring syst.ms Net.orked cont.ol DNA comput.ng Ellipt.c curve crypt.graphy(ECC) Profile t.ble

Brain t.mor Segment.t.on t.rough Level Based Learning Model

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Comput.r Syst.ms Science & Engineering 2023年第1期44卷 709-720页

作者： K.Dinesh Babu C.senthil Singh Depart.ent.of Elect.onics and Communicat.on Engineering Adhi College of Engineering and Technology631605India Depart.ent.of Elect.onics and Communicat.on Engineering Infant Jesus College of EngineeringVallanaduThoothukudi628851India

Brain t.mors are pot.nt.ally fat.l presence of cancer cells over a human brain,and t.ey need t. be segment.d for accurat. and reliable planning of *** process must.be carried out.in different.regions based on which t.e st.ges of cancer can be accurat.ly *** pat.ent. exhibit.a different.level of challenge in t.rms of cancer or t.mors det.ct.on as t.e Magnet.c Resonance Imaging(MRI)images possess varying sizes,shapes,posit.ons,and *** scanner used for sensing t.e locat.on of t.mors cells will be sub-ject.d t. addit.onal prot.cols and measures for accuracy,in t.rn,increasing t.e t.me and affect.ng t.e performance of t.e ent.re *** t.is view,Convolut.onal Neural Net.orks deliver suit.ble models for efficient.segment.t.on and t.us delivered promising *** previous st.at.gies and models failed t. adhere t. diversit. of sizes and shapes,proving t. be a well-est.blished solut.on for det.ct.ng t.mors of bigger *** t.nd t. be smaller in size and shape during t.eir premat.re st.ges and t.ey can easily evade t.e algorit.ms of Convolut.onal Neural Net.ork(CNN).t.is proposal int.nds t. furnish a det.iled model for sensing early st.ges of cancer and hence perform segment.t.on irrespect.ve of t.e current.size and shape of *** size of net.orks and layers will lead t. a significant.weight.ge when mult.ple kernel sizes are involved,especially in mult.-resolut.on *** t.e ot.er hand,t.e proposed model is designed wit. a novel approach including a dilat.d convolut.on and level-based learning *** t.e convolut.on process is dilat.d,t.e process of feat.re ext.act.on deals wit. mult.scale object.ve and level-based learning eliminat.s t.e short.oming of previous models,t.ereby enhancing t.e qualit. of smaller t.mors cells and *** level-based learning approach also encapsulat.s t.e feat.re recon-st.uct.on processes which highlight. t.e sensing of small-scale t.mors ***,segment.ng t

关键词： Glioma det.ct.on segment.t.on smaller t.mour growt. machine learning feat.re analysis

In vit.o and in vivo ant.cancer act.vit. of Indigofera cassioides ***. DC.

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Asian Pacific Journal of t.opical Medicine 2011年第5期4卷 379-385页

作者： Raju senthil kumar Balasubramanian Rajkapoor Perumal Perumal Nat.ral Product. Laborat.ry Swamy Vivekanandha College of PharmacyTiruchengoduTamilnaduIndia Depart.ent.of Pharmacology Dayanandha Sagar College of PharmacyBangaloreIndia Depart.ent.of Pharmaceut.cal Chemist.y JKK Nataraja College of PharmacyKomarapalayamTamilnaduIndia

Object.ve:t. evaluat. t.e ant.t.mor,cyt.t.xic and ant.oxidant.act.vit.es of met.anolic leaf ext.act.of Indigofera cassioides(MEIC) against.t.ansplant.ble t.mors and human cancer cell ***:MEIC was invest.gat.d for it. short.t.rm cyt.t.xicit. on EAC and DLA cells by t.ypan blue dye exclusion met.od and in vit.o cyt.t.xicit. on HeLa,HEp-2,HEpG-2,MCF-7, Ht.29,Vero and NIH 3t. cells by Mt. *** vivo ant.t.mor act.vit. was st.died on EAC and DLA t.mor bearing *** was assessed by monit.ring t.e mean survival t.me,effect.on hemat.logical paramet.rs,ant.oxidant.enzyme levels and solid t.mor ***:MEIC exhibit.pot.nt.in vit.o cyt.t.xicit. against.all t.e t.st.d cancer cell lines,but.it.was found t. be safe on normal *** ext.act.significant.y(P<.0.001) increase t.e mean survival t.me and also have a prot.ct.ve effect.on t.e hemopoiet.c syst.m at.t.e t.st.d dose levels(200 and 400 mg/kg). t.e ext.act.prevent.d lipid peroxidat.on and rest.red t.e ant.oxidant.enzymes cat.lase, superoxide dismut.se,glut.t.ione peroxidase and glut.t.ione-s-t.ansferase in t.e liver of t.mor cont.ol *** also significandy(P<.0.01) reduce t.e solid t.mor ***:t.e result. st.ongly support.t.at.MEIC shows pot.nt.ant.t.mor and cyt.t.xic effect. against.EAC,DLA and human cancer cell *** ext.act.prevent. lipid peroxidat.on and promot.s t.e enzymat.c ant.oxidant.defense syst.m in t.mor bearing animals which might.be due t. act.vit.es like scavenging of free radicals by t.e phyt.chemicals in MEIC.

关键词： Indigofera cassioides Cyt.t.xicit. Ant.t.mor Ant.oxidant Mean survival t.me Hemat.logical paramet.rs Solid t.mor volume

t.RFuzzy:t.ngent.al holoent.opy-enabled rough fuzzy classifier t. classificat.on of evolving dat. st.eams

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Journal of Cent.al Sout. Universit. 2017年第8期24卷 1789-1800页

作者： Jagannat. E.Nalavade t.senthil Murugan Depart.ent.of CSE Veltech Dr.RR&Dr.SR Technical UniversityChennaiIndia

t.e rapid development. in t.e fields of t.lecommunicat.on, sensor dat., financial applicat.ons, analyzing of dat. st.eams, and so on, increase t.e rat. of dat. arrival, among which t.e dat. mining t.chnique is considered a vit.l process. t.e dat. analysis process consist. of different.t.sks, among which t.e dat. st.eam classificat.on approaches face more challenges t.an t.e ot.er commonly used t.chniques. Even t.ough t.e classificat.on is a cont.nuous process, it.requires a design t.at.can adapt.t.e classificat.on model so as t. adjust.t.e concept.change or t.e boundary change bet.een t.e classes. Hence, we design a novel fuzzy classifier known as t.RFuzzy t. classify new incoming dat. st.eams. Rough set.t.eory along wit. t.ngent.al holoent.opy funct.on helps in t.e designing t.e dynamic classificat.on model. t.e classificat.on approach uses kernel fuzzy c-means(FCM) clust.ring for t.e generat.on of t.e rules and t.ngent.al holoent.opy funct.on t. updat. t.e membership funct.on. t.e performance of t.e proposed t.RFuzzy met.od is verified using t.ree dat.set., namely skin segment.t.on, localizat.on, and breast.cancer dat.set., and t.e evaluat.d met.ics, accuracy and t.me, comparing it. performance wit. HRFuzzy and adapt.ve k-NN classifiers. t.e experiment.l result. conclude t.at.t.RFuzzy classifier shows bet.er classificat.on result. providing a maximum accuracy consuming a minimal t.me t.an t.e exist.ng classifiers.

关键词：模糊分类器数据流分析粗糙集理论数据挖掘技术 fuzzy方法 k-NN分类分类模型模糊C均值