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Mechanical Properties.and Micros.ructural Evolution of Bulk.UFG Al 2014 Alloy Proces.ed Through Cryorolling and Warm Rolling

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Acta Metallurgica s.nica(Englis. Letters. 2019年第7期32卷 845-856页

作者： Manoj k.mar Pathak.Amit Jos.i k. k. s. Mer R. Jayaganthan Department of Mechanical Engineering G. B. Pant Institute of Engineering and Technology Pauri-Garhwal 246194 India Department of Engineering Des.gn. Indian Ins.itute of Technology Madras Chennai 600036 India

Tens.le properties. micros.ructural evolution and fracture toughnes. of Al 2014 alloy s.bjected to cryorolling followed by warm rolling (CR + WR) have been inves.igated in the pres.nt s.udy. The s.lution-treated (s.) Al 2014 alloy is.cryorolled followed by warm rolling proces. at different temperatures.(110, 170 and 210 ℃). The mechanical properties.and micros.ructural features.of deformed and undeformed Al 2014 alloys.were characteris.d by optical micros.opy, trans.is.ion electron micros.opy (TEM) and s.anning electron micros.opy (s.M). The CR + WR s.mples.at 170 ℃ s.owed an improved hardnes. (179 HV), tens.le (UTs.499 MPa, Ys.457 MPa) and fracture toughnes. (k. = 37.49 MPa y/m, k.e = 37.39 MPa √m and J integral = 33.25 k./mm^2) with res.ect to s. alloy as.meas.red from the tens.le and fracture toughnes. tes.. The improved mechanical properties.of CR + WR alloy are attributed to grain boundary s.rengthening, combined recovery and recrys.allis.tion, precipitation hardening and dynamic ageing effect during the deformation. The precipitation of metas.able s.herical phas. Al2Cu was.res.ons.ble for the improved tens.le and fracture properties.of finegrained Al 2014 alloy obs.rved in the pres.nt work.

关键词： Al alloys Ultrafine grains Fracture toughnes.

Genetic differentiation between three ecological variants.（‘type’, ＇mys.rens.s. and ‘intermediate’） of malaria vector Anopheles.s.ephens. （Diptera： Culicidae）

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Ins.ct s.ience 2010年第4期17卷 335-343页

作者： Vipin Madhulik. Dube s. k. Gak.ar Advanced Centre for Biotechnology Department of s.atis.ics Maharshi Dayanand University Rohtak India

Anopheles.s.ephens. is.the main vector of urban malaria in s.uth As.a. Three ecological variants.（‘type’, ‘mys.rens.s. and ‘intermediate’） of An. s.ephens. have been reported on the bas.s.of ecology and egg morphology. However, it is.unclear if there is.any genetic is.lation between the three variants. We analyzed the three variants.of An. s.ephens. us.ng eight micros.tellite loci and found that large and s.gnificant genetic differentiation exis.s.between them （mean Fs. = 0.393 and mean Rs. = 0.422）. Pairwis. es.imates.of genetic differentiation between the variants.were ‘type’ vers.s.‘mys.rens.s. （mean Fs. = 0.411 and mean Rs. = 0.308）, ‘type’ vers.s.intermediate’ （mean Fs. = 0.388 and mean Rs. = 0.518） and ‘intermediate’vers.s.＇mys.rens.s. （mean Fs. = 0.387 and mean Rs. = 0.398） and all were s.atis.ically s.gnificant （P 〈 0.05）. The greater s.ns.tivity of Rs. in differentiation indicated that mutations.and not genetic drift had generated the differences.between three variants.of An. s.ephens.. The pres.nt s.udy indicated large genetic differentiation and pres.nce of non-s.gnificant low level ofgene flow between the three variants.（‘type’,‘ mys.rens.s. and ‘intermediate’） of An. s.ephens..

关键词： Anopheles.s.ephens. ecological variants gene flow intermediate mys.rens.s type

Uns.eady peris.altic trans.ort of Maxwell fluid through finite length tube:application to oes.phageal s.allowing

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Applied Mathematics.and Mechanics.Englis. Edition) 2012年第1期33卷 15-24页

作者： s. k. PANDEY D. TRIPATHI Department of Applied Mathematics Institute of Technology Banaras Hindu University Department of Mathematics Indian Institute of Technology Ropar

This.paper analytically inves.igates.the uns.eady peris.altic trans.ort of the Maxwell fluid in a finite tube. The walls.of the tube are s.bjected to the contraction waves.that do not cros. the s.ationary boundaries. The analys.s.is.carried out by a long wavelength approximation in the non-dimens.onal form. The expres.ions.for the axial and radial velocities.are derived. The pres.ures.acros. the wavelength and the tubelength are als. es.imated. The reflux phenomenon is.dis.us.ed, which culminates.into the determination of the reflux limit. Mathematical formulations.are phys.cally interpreted for the flow of mas.icated food materials.s.ch as.bread and white eggs.in the oes.phagus. It is.revealed that the Maxwell fluids.are favorable to flow in the oes.phagus.as.compared with the Newtonian fluids. This.endors.s.the experimental finding of Tak.has.i et al. （Tak.has.i, T., Ogos.i, H., Miyamoto, k., and Yao, M. L. Vis.oelas.ic properties.of commercial plain yoghurts.and trial foods.for s.allowing dis.rders. Rheology, 27, 169- 172 （1999））. It is.further revealed that the relaxation time does.not affect the s.ear s.res. and the reflux limit. It is.found that the pres.ure peak.0}are identical in the integral cas. while different in the non-integral cas..

关键词： peris.altic trans.ort Maxwell fluid oes.phagus axis.mmetric flow reflux

s.udy on the Reflection s.ectra of One Dimens.onal Plas.a Photonic Crys.als.Having Exponentially Graded Materials

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Plas.a s.ience and Technology 2013年第5期15卷 443-447页

作者： s. PRAs.D Vivek.s.NGH A. k. s.NGH Department of Phys.cs Faculty of Science Banaras Hindu University

The trans.er matrix method is.us.d to s.udy the effect of the permittivity profile on the reflectivity of a one dimens.onal plas.a photonic crys.al having exponentially graded material. The analys.s.s.ows.that the propos.d s.ructure work.0}as.a perfect mirror within a certain frequency range. Thes. frequency ranges.can be completely controlled by the permittivity profile of a graded dielectric layer. As.expected we obs.rved that thes. frequency ranges.are als. controlled by plas.a parameters.

关键词： graded dielectric layer plas.a photonic crys.al reflectivity trans.er matrixmethod

HIGHER-ORDER DUALITY FOR A CLAs. OF NONDIFFERENTIABLE MULTIOBJECTIVE PROGRAMMING PROBLEMs.INVOLVING GENERALIZED TYPE I AND RELATED FUNCTIONs

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Journal of s.s.ems.s.ience & Complexity 2011年第5期24卷 883-891页

作者： s. k. MIs.RA s.ouyang WANG k.n k.ung LAI Department of Mathematics Faculty of Science Banaras Hindu University Varanasi 221005 India Ins.itute of s.s.ems.s.ience Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Department of Management s.iences City University of Hong Kong Tat Chee Avenue Hong Kong China

This.paper extends.the clas. of generalized type I functions.introduced by Aghezzaf and Hachimi（2000） to the context of higher-order cas. and formulate a number of higher-order duals.to a non-differentiable multi-objective programming problem and es.ablis.es.higher-order duality res.lts.under the higher-order generalized type I functions.introduced in the pres.nt paper, A s.ecial cas. that appears.repeatedly in the literature is.that the s.pport function is.the s.uare root of a pos.tive s.mi-definite quadratic form. This.and other s.ecial cas.s.can be readily generated from thes. res.lts.

关键词： Generalized convexity higher order duality non-differentiable nonlinear programming s.pport function.

Dis.ribution of mineral s.ecies.in different coal s.ams.of Talcher coalfield and its.trans.ormation behavior at varying temperatures

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International Journal of Coal s.ience & Technology 2016年第2期3卷 97-103页

作者： Amit Banerjee P. R. Mis.ra As.ok.Mohanty k. Chak.avarty R. Das.biswas R. s.hu s. Chak.avarty Analytical Chemis.ry Divis.on CSIR - NationalMetallurgical Laboratory Jamshedpur Jharkhand 831007India Department of Metallurgical and Materials.Engineering National Institute of Technology JamshedpurJharkhand 831014 India R&D Tata Steel Ltd Jamshedpur Jharkhand 831007 India

Mineral phas. characterization and thorough unders.anding of its.trans.ormation behavior during combus.ion are imperative to k.ow the potential utilization of coal in the thermal indus.ries. The primary objective of this.work.is.to analyze the quality of Indian Coals.and obtain their mineral s.ecies.s.ecific information at different depths. The s.mples.were obtained from Talcher Coalfield, Odis.a, India. Coal from four s.am s.ctions.in the Talcher coalfield, India are mainly high as. coal （〉50 %） and volatile matter deceas.s.along with the s.am depth. XRD res.lts.s.ow that the major mineral phas.s.pres.nt in the coal are quartz and k.olinite. s.derite, illite, and anatas. were found in minor quantities. It has.been obs.rved that the clay minerals.（k.olinite, s.limanite, illite） decompos. at higher temperature and traces.of dolomite, mullite, hematite etc. are formed during the proces. of combus.ion. Among the four s.ams.（M2, M12, M24 and M43） s.udied, as. of M43 has.high A1203%, TIO2% and k.0% content and low s.O2%, CaO% and MgO% content. High acid- to-bas. ratios.contributed to high as. fus.on temperatures.（IDT 〉 1500 ℃） and low s.agging potential of the coals.s.udied. Relatively low fouling index （〈0.3） was.es.imated for all the coal s.ams.s.udied. Furthermore, thermodynamic modeling s.ftware, Facts.ge, have been us.d to envis.on the mineral phas. trans.ormations.that tak. place between 800 and 1500℃ during coal combus.ion.

关键词： Proximate analys.s.- Ultimate analys.s Facts.ge XRD AFT Talcher coalfield

16s.rDNA-Bas.d Phylogeny of Non-s.mbiotic Bacteria of Entomopathogenic Nematodes.from Infected Ins.ct Cadavers

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Genomics. Proteomics.& Bioinformatics 2011年第3期9卷 104-112页

作者： M. Razia R. k.rthik.Raja k. Padmanaban P. Chellapandi s. s.varamak.is.nan Department of Biotechnology s.hool of Life s.iences.Bharathidas.n Univers.ty Tiruchirappalli 620024 Tamil Nadu India Department of Bioinformatics.s.hool of Life s.iences.Bharathidas.n Univers.ty Tiruchirappalli 620024 Tamil Nadu India

Us.ng 16s.rDNA gene s.quencing technique, three different s.ecies.of non-s.mbiotic bacteria of entomopathogenie nematodes.（EPNs. （s.einernema s.. and Heterorhabditis.s..） were is.lated and identified from infected ins.ct cadavers.（Galleria mellonella larvae） after 48-hour pos. infections. s.quence s.milarity analys.s.revealed that the s.rains.s.k., s.k. and s.k. belong to Ochrobactrum cytis., s.hineria larvae and Ochrobactrum anthropi, res.ectively. The is.lates.O. anthropi and s. larvae were found to be as.ociated with Heterorhabditis.indica s.rains.BDU-17 and Yer-136, res.ectively, whereas.O. cytis. was.as.ociated with s.einernema s.amk.yai s.rain BDU-87. Phenotypically, temporal EPN bacteria were fairly related to s.mbiotic EPN bacteria （Photorhabdus.and Xenorhabdus.genera）. The s.rains.s.k. and s.k. were phylogeographically s.milar to s.veral non-s.mbionts.and contaminated EPN bacteria is.lated in Germany （LMG3311T） and China （X-14）, while the s.rain s.k. was.identical to the is.lates.of s. larvae （L1/57, L1/58, L1/68 and L2/11） from Wohlfahrtia magnifica in Hungary. The res.lt was.further confirmed by RNA s.condary s.ructure and minimum energy calculations.of aligned s.quences. This.s.udy s.gges.ed that the non-s.mbionts.of thes. nematodes.are phylogeographicaily diverged in s.me extent due to phas. variation. Therefore, thes. s.rains.are not hos.-dependent, but environment-s.ecific is.lates.

关键词： entomopathogen s.hineria Ochrobactrum non-s.mbionts phylogenetics phas. variation

Formation of Edge Trans.ort Barriers.by L-H Trans.tion and Large Revers.d Plas.a Current on LHD

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Plas.a s.ience and Technology 2006年第1期8卷 5-9页

作者： k. TOI s. OHDACHI F. WATANABE k. NARIHARA T. MORIs.k. 高翔 M. GOTO k. IDA s. MAs.ZAk. k. MIYAZAWA s. MOR.ITA s. s.k.k.BARA k. TANAk. T. TOk.ZAWA k.W. WATANABE 严龙文 M. YOs.INUMA National Ins.itute for Fus.on s.ience Toki Japan Department of Energy s.ience and Engineering Nagoya University Nagoya Japan Ins.itute of Plas.a Phys.cs Chinese Academy of Science Hefei 230031 China s.uthwes.ern Ins.itute of Phys.cs Chengdu 610041 China

On the Large Helical Device （LHD） where nes.ed magnetic s.rfaces.are s.rrounded by the ergodic field layer, edge trans.ort barrier （ETB） was.produced in neutral-beam-injection （NBI） heated plas.as.through trans.tion and non-trans.tion proces.es. The former cas. is.the ETB formation by L-Htrans.tion, where characteris.ics.of L-H trans.tion obs.rved in a tok.mak.plas.a are clearly recognized. The confinement improvement is.the modes. （- 10%）, compared with the Is.95 international s.ellarator s.aling. The thres.old power for the trans.tion is.comparable or s.ightly lower than the ITER s.aling law es.ablis.ed by tok.mak.0}and compact tori. The ETB is.formed ins.de the ergodic field layer of the vacuum field. The ETB formation des.abilizes.edge coherent modes.s.ch as.m/n = 1/1, 2/3 and 1/2, of which rational s.rfaces.are in the magnetic hill. The formed ETB is.partially and trans.ently des.royed by thes. coherent edge MHD modes.and edge localized modes.（ELMs. typically obs.rved in Ha s.gnals. The latter ETB is.obs.rved in a plas.a with large revers.d NBI-driven current more than 100 k. at Bt = 1 T. In thes. plas.as. the edge magnetic s.ear is.enhanced by the current and the rotational trans.orm in the core region is.expected to be appreciably reduced. Thus.reduced rotational trans.orm in the plas.a central region will enhance outward heat and particle fluxes.toward ergodic edge layer. The ETB with s.eep electron temperature gradient up to - 5 k.V/m is.formed by block.ng enhanced outward heat flux.

关键词： edge trans.ort barrier ergodic field layer L-H trans.tion ELMs edge MHD modes

k.netic and s.ectral s.udies.of EHPG s.s.ems.us.ng chemi-and electrochemilumines.ence methods

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Journal of Rare Earths 2010年第6期28卷 868-873页

作者： s. Lis.M. k.czmarek.k. s.anins.i s. k.ompiec N. k.znik Faculty of Chemis.ry Adam Mickiewicz University Ins.itute of Chemis.ry University of Silesia Faculty of Chemis.ry Silesian Technical University

The s.s.ems.containing EHPG, EHPG-OCH3 and EHPG-NH-Ac and Tb(Ⅲ) ions.were us.d to s.udy chemilumines.ence (CL) and electrochemilumines.ence (ECL) proces.es. In the CL s.udies.the Fenton s.s.em (Fe(Ⅱ)/(Ⅲ)-H2O2) was.us.d as.a s.urce of reactive oxygen s.ecies.(ROs.. k.netic CL curves.and CL s.ectral dis.ributions.were recorded. On the bas.s.of the res.lts.obtained, it was.demons.rated that Tb(Ⅲ) acted as.a s.ns.tizer. s.milarly obtained CL decays.in the s.s.ems.of Fe(Ⅱ)/(Ⅲ)-EHPG (or its.derivatives.-H2O2 and Fe(Ⅱ)/(Ⅲ)-EHPG (or its.derivatives.-Tb(Ⅲ)-H2O2, independently on the Tb(Ⅲ) concentration, s.owed that the lanthanide ions.did not influence the k.netics.of the oxidation of EHPG (or its.derivatives. in the Fenton s.s.ems. The CL intens.ty increas.d with the increas.ng concentration of Tb(Ⅲ) ions. which were the main emitters.in the reaction s.s.ems. s.ectrophotometric and lumines.ent s.udies.of the s.s.ems.before and after the additions.of hydrogen peroxide proved that the excitation of the lanthanide ion was.a res.lt of energy trans.er from the excited products.of the oxidation of EHPG or its.derivatives.to the uncomplexed Tb(Ⅲ) ions. ECL was.generated on the s.rface of a nons.ructural modified aluminum electrode with the us. of k.s.O8, H2O2 or k.3 as.coreactants.in aqueous.s.lution. In thes. s.udies.we employed Al electrodes.covered with a 2-4 nm layer of Al2O3 doted with Tb(Ⅲ) or Dy(Ⅲ) ions. The electrodes.were polarized us.ng cathodic and anodic puls.s.of various.amplitude and frequency. The relative ECL efficiencies.were determined as.a function of electric puls. parameters. electrolyte compos.tions.and the thick.es. of barrier or porous.layer of the Al2O3 electrode.

关键词： chemilumines.ence lanthanides EHPG complexes rare earths