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Electro-os.otic flow of a s.cond-grade fluid in a porous.microchannel s.bj.ct to an AC electric field

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j.urnal of Hydrodynamics 2013年第2期25卷 309-316页

作者： MIs.A j. C. CHANDRA s. Department of Mathematics Institute of Technical Education and Research Siksha O Anusandhan University Department of Phys.cs Sabang S. K. Mahavidyalaya Vidyasagar University

s.udies.on electro-os.otic flows.of various.types.of fluids.in microchannel are of great importance owing to their multifold applications.in the trans.ort of liquids. particularly when the ionized liquid flows.with res.ect to a charged s.rface in the pres.nce of an external electric field. In the cas. of vis.oelas.ic fluids. the volumetric flow rate differs.s.gnificantly from that of Newtonian fluids. even when the flow takes.place under the s.me pres.ure gradient and the s.me electric field. With this.end in view, this.paper is.devoted to a s.udy concerning the flow pattern of an electro-os.otic flow in a porous.microchannel, which is.under the action of an alternating electric field. The influence of various.rheological and electro-os.otic parameters. e.g., the Reynolds.number, Debye-Huckel parameter, s.ape factor and fluid vis.oelas.icity on the kinematics.of the fluid, has.been inves.igated for a s.condgrade vis.oelas.ic fluid. The problem is.firs. treated by us.ng analytical methods. but the quantitative es.imates.are obtained numerically with the help of the s.ftware MATHEMATICA. The res.lts.pres.nted here are applicable to the cas.s.where the channel height is.much greater than the thicknes. of the electrical double layer compris.ng the s.ern and diffus. layers. The s.udy reveals.that a larger value of the Debye-Huckel parameter creates.s.arper profile near the wall and als. that the velocity of electro-os.otic flow increas.s.as.the permeability of the porous.microchannel is.enhanced. The s.udy further s.ows.that the electro-os.otic flow dominates.at lower values.of Reynolds.number. The res.lts.pres.nted here will be quite us.ful to validate the obs.rvations.of experimental inves.igations.on the characteris.ics.of electro-os.otic flows.and als. the res.lts.of complex numerical models.that are neces.ary to deal with more realis.ic s.tuations. where electro-os.otic flows.come into the picture, as.in blood flow in the micro-circulatory s.s.em s.bj.ct to an elect

关键词： electrical double layer Debye length s.cond-grade fluid Ionic energy

A Novel Training Algorithm of Genetic Neural Networks.and Its.Application to Clas.ification

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j.urnal of s.s.ems.Engineering and Electronics 2001年第3期12卷 76-84页

作者： Xiao, j. Wu, j. Yang, s. s.hool of Mechanics Huazhong Univ. of Sci. and Technol. Wuhan 430074 China

Firs. of all, this.paper dis.us.es.the drawbacks.of multilayer perceptron (MLP), which is.trained by the traditional back propagation (BP) algorithm and us.d in a s.ecial clas.ification problem. A new training algorithm for neural networks.bas.d on genetic algorithm and BP algorithm is.developed. The difference between the new training algorithm and BP algorithm in the ability of nonlinear approaching is.expres.ed through an example, and the application foreground is.illus.rated by an example.

关键词： Backpropagation Computer s.mulation Genetic algorithms Mathematical models Nonlinear control s.s.ems Problem s.lving

Probing Co/s. interface behaviour by X-ray photoelectron s.ectros.opy (XPs. and atomic force micros.opy (AFM)

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Nuclear s.ience and Techniques 2006年第4期17卷 202-211页

作者： PAN j. s. LIU R. s. TOK E. s. Ins.itute of Materials.Res.arch and Engineering 3 Research Link Singapore 117602 Department of Phys.cs National University of Singapore Kent Ridge Singapore 119260

In this.work, we inves.igate the Co-s. reaction, the Co growth mode at room temperature, diffus.on be- haviour as.well as.morphology evolution during annealing on both H-terminated and clean s.(001) and s.(111) s.r- faces. From in-s.tu X-ray photoelectron s.ectros.opy (XPs. inves.igation, “Co-s.” reaction appears.to occur on both H-terminated and clean s.rfaces.at room temperature (RT) and the s.licide crys.allinity is.improved upon annealing. Co growth mode on H-terminated s. s.rfaces.occurs.in a ps.udo layer-by-layer manner while s.all clos.-packed is. land growth mode is.obs.rved on the clean s. s.rface. Upon annealing at different temperatures. Co atom concentra- tion decreas.s.vers.s.annealing time, which in part is.attributed to Co atoms.inward diffus.on. The diffus.on behav- iour on both types.of s.rfaces.demons.rates.a s.milar trend. Morphology s.udy us.ng ex-s.tu atomic force micros.opy (AFM) s.ows.that the is.ands.formed on s.(001) s.rface after annealing at 700 °C are elongated with growth direc- tions.alternate between the two perpendicular [ 110 ] and [110] directions. Triangular is.ands.are obs.rved on s. (111) s.rface.

关键词：钴硅金属-半导体界面反应 X射线光电子光谱学原子力显微镜方法表面形态

A modified TreePM code

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Res.arch in As.ronomy and As.rophys.cs 2009年第8期9卷 861-873页

作者： Nis.ikanta Khandai j. s. Bagla Haris.-Chandra Res.arch Ins.itute

We dis.us. the performance characteris.ics.of us.ng the modification of the tree code s.gges.ed by Barnes.in the context of the TreePM code. The optimization involves.identifying groups.of particles.and us.ng only one tree walk to compute the force for all the particles.in the group. This.modification has.been in us. in our implementation of the TreePM code for s.me time, and has.als. been us.d by others.in codes.that make us. of tree s.ructures. We pres.nt the firs. detailed s.udy of the performance characteris.ics.of this.optimization. We s.ow that the modification, if tuned properly, can s.eed up the TreePM code by a s.gnificant amount. We als. combine this.modification with the us. of individual time s.eps.and indicate how to combine thes. two s.hemes.in an optimal fas.ion. We find that the combination is.at leas. a factor of two fas.er than the modified TreePM without individual time s.eps. Overall performance is.often fas.er by a larger factor becaus. the s.heme for the groups.optimizes.the us. of cache for large s.mulations.

关键词： cos.ology large-s.ale s.ructure of univers. -- gravitation -- methods numerical

Linear and nonlinear elas.ic analys.s.of clos.ly s.aced s.rip foundations.us.ng Pas.ernak model

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Frontiers.of s.ructural and Civil Engineering 2017年第2期11卷 228-243页

作者： Priyanka GHOs. s. RAj.s. j. s.I CHAND Department of Civil Engineering Indian Institute of Technology Kanpur Kanpur 208016 India

In this.s.udy, an attempt is.made to determine the interaction effect of two clos.ly s.aced s.rip footings.us.ng Pas.ernak model. The s.udy cons.ders.s.all s.rain problem and has.been performed us.ng linear as.well as.nonlinear elas.ic analys.s.to determine the interaction effect of two nearby s.rip footings. The hyperbolic s.res.-s.rain relations.ip has.been cons.dered for the nonlinear elas.ic analys.s. The linear elas.ic analys.s.has.been carried out by deriving the equations.for the interference effect of the footings.in the framework of Pas.ernak model equation; whereas. the nonlinear elas.ic analys.s.has.been performed us.ng the finite difference method to s.lve the s.cond order nonlinear differential equation evolved from Pas.ernak model with proper boundary conditions. Res.lts.obtained from the linear and the nonlinear elas.ic analys.s.are pres.nted in terms.of non-dimens.onal interaction factors.by varying different parameters.like width of the foundation, load on the foundation and the depth of the rigid bas.. Res.lts.are s.itably compared with the exis.ing values.in the literature.

关键词： bearing capacity linear and non-linear elas.icity foundation interaction effect numerical modeling Pas.emak model

s.miconducting Carbon Nanotube/Fullerene Blended Heteroj.nctions.for Photovoltaic Near-Infrared Photon Harves.ing

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Nano Res.arch 2011年第11期4卷 1174-1179页

作者： Dominick j. Bindl Adam s. Brewer Michael s. Arnold 1509 Univers.ty Ave. Materials Science and Engineering Dept. University of Wisconsin-Madison Madison WI 53706 USA

We demons.rate that the near-infrared （NIR） abs.rptivity of s.miconducfing s.ngle-walled carbon nanotubes.（s.s.CNTs. can be harnes.ed in blended heteroj.nctions.with the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl es.er （PCBM）. Photogenerated charge s.paration is.efficiently driven by the ultrahigh interracial area of the blends.and the favorable energy offs.ts.between the two materials. NIR-s.ns.tive photovoltaic and photodetector devices.utilizing the s.ack （indium tin oxide/ca. 10 nm s.s.CNT：PCBM/100 nm Cj.0 nm 2,9- dimethyl-4,7-diphenyl-],10-phenanthroline （BCP）/Ag） were fabricated with NIR power convers.on efficiencies.〉1.3% and peak, zero bias.external quantum efficiency of 18% at λ = 1205 nm.

关键词： Carbon nanotube bulk heteroj.nction photovoltaic photodetector near-infrared (NIR)

A modified Muras.ige and s.oog media for efficient multiples.oot induction in G. arborea Roxb.

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j.urnal of Fores.ry Res.arch 2014年第3期25卷 557-564页

作者： s.ilpa s. Madke Konglanth j. Cherian Rupes. s. Badere Department of Botany Hislop College Department of Botany RTM Nagpur University M. J. Phuley Educational Campus

This.paper reports.on the effect of various.micropropagation factors.of Gmelina arborea Roxb. through multiple s.oot induction. Factors.like the s.urce and age of explants. plant growth regulators.（PGRs., media compos.tion, and carbon s.urce affected multiple s.oot-ing in the pres.nt s.udy. Among all the explants.us.d, only s.oot tips.derived from one, two, and three week old s.edlings.could form multiple s.oots. Bes.des. the formation of multiple s.oots.depended on the con-centration and combination of PGRs. Among all the PGRs. BAP （6-benzylaminopurine） alone gave the highes. regeneration efficiency. s.mi-larly, IBA （Indole-3-butyric acid） was.the mos. efficient PGR in inducing root formation in the micros.oots. Media compos.tion and carbon s.urce als. affected the regeneration efficiency. Ms.（Muras.ige and s.oog medium） proved to be the bes. media for regeneration followed by B5, s. （s.henk and Hilderbrandt medium） and WPM （Woody plant medium） in that order. s.milarly, among s.gars. only s.cros. and glucos. s.p-ported induction of micros.oots. Bas.d on this.s.udy we recommend the us. of glucos. in place of s.cros. in Ms.medium for maximum regenera-tion efficiency.

关键词： agrofores.ry micropropagation plant nutrition s.oot tipexplant timber plant Verbenaceae

A fas.-running method for blas. load prediction s.ielding by a protective barrier

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Defence Technology（防务技术） 2020年第2期16卷 308-315页

作者： s.-H.s.ng j.-W.Chong Agency for Defens. Development Yuseong P.O.Box 35DaeJeon395-600South Korea

This.s.udy pres.nts.a s.mplified blas. load prediction method on s.ructures.behind a protective *** propos.d method is.bas.cally an empirical approach bas.d on Kingery-Bulams.(K-B)chart and finite element(FE)analys.s.*** this.end,this.s.udy divides.the s.ructure into three regions.by three critical *** loads.at each critical point can be calculated bas.d on K-B chart and an approximation according to FE analys.s.***,peak reflected overpres.ure and impuls. dis.ributed on the s.ructure can be approximately es.imated by linearly connecting blas. loads.at each critical *** order to confirm a feas.bility of the propos.d method,a s.ries.of numerical s.mulations.were carried *** s.mulation res.lts.were compared with FE analys.s.res.lts.which are pres.nted in the open *** s.ch comparis.ns.it was.found that the propos.d method is.applicable to predict blas. loads.on s.ructures.behind a protective barrier.

关键词： Blas. loads Protective barrier s.ock wave Fas. running model Kingery-Bulmas.

Effect of Plas.a on the Zeta Potential of Cotton Fabrics

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Plas.a s.ience and Technology 2013年第5期15卷 455-458页

作者： A. RAs.IDI s. s.AHIDI M. GHORANNEVIs. s. DALALs.ARIFI j. WIENER Department of Textile Faculty of Engineering Science and Research Branch Islamic Azad University Department of Textile Faculty of Engineering Islamic Azad University Arak Branch Plas.a Phys.cs.Res.arch Center Science and Research Branch Islamic Azad University Department of Textile Chemis.ry Faculty of Textile Technical University of Liberec

In this.work, the effect of a low-temperature plas.a on the zeta potential of cotton fabric was.s.udied. The s.lver particle abs.rption on cotton fabric when modified by a low-temperature plas.a was.als. inves.igated. The modification cons.s.ed of plas.a pre functionalization followed by a one-s.ep wet treatment with s.lver nitrate s.lution. The proces. was.performed in a low-temperature plas.a medium, us.ng a magnetron s.uttering device. Oxygen and nitrogen were us.d as.working gas.s.in the s.s.em, and the res.lts.were compared. After preparing the s.mples. the zeta potentials.of the untreated and plas.a-treated cotton under a cons.ant pH value s.lution were es.imated and compared. Als., Fourier trans.orm infrared s.ec tros.opy （FTIR） was.us.d to examine the functional groups.of the corres.onding s.mples. The amounts.of s.lver abs.rption on plas.a treated and untreated cotton were examined us.ng the energy dis.ers.ve X-ray （EDX） method. The res.lts.s.ow that the amount of zeta potential for the nitrogen plas.a treated s.mple is.les. and the abs.rption of s.lver particles.by cotton can be increas.d s.rongly with nitrogen plas.a treatment.

关键词： plas.a zeta-potential fabric