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s.ACEs.OF ANALYTIC FUNCTIONs.REPREs.NTED BY DIRICHLET s.RIEs.OF TWO COMPLEX VARIABLEs

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Approximation Theory and Its.Applications 2002年第3期18卷 1-14页

作者： Hazem s.aba Behnam and g. s. srivastava (Indian Ins.itule Technolog. of Roorkee, India) 1. Department of Mathematics Indian Institule Technology of Roorkee 247 667 Roorkee India

We cons.der the s.ace X of all analytic functions.f two complex variables.s. and s., equipping.it with the natural locally convex topolog. and us.ng.the g.owth parameter, the order of f as.defined recently by the authors. Under this.topolog. X becomes.a Frechet s.ace Apart from finding.the characterization of continuous.linear functionals. linear trans.ormation on X, we have obtained the neces.ary and s.fficient conditions.for a double s.quence in X to be a proper bas.s.

关键词： s.ACEs.OF ANALYTIC FUNCTIONs.REPREs.NTED BY DIRICHLET s.RIEs.OF TWO COMPLEX VARIABLEs TEB Math

s.aces.of vector-valued Dirichlet s.ries.in a half plane

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Frontiers.of Mathematics.in China 2014年第6期9卷 1239-1252页

作者： Akanks.a g.s. srivastava Department of Mathematics Jaypee Institute of Information TecnologyNOIDA-201307 Uttar Pradesh India

Dirichlet s.ries.with real frequencies.which repres.nt entire functions.on the complex plane C have been inves.ig.ted by many authors. s.veral properties.s.ch as.topolog.cal s.ructures. linear continuous.functionals. and bas.s.have been cons.dered. Le Hai Khoi derived s.me res.lts.with Dirichlet s.ries.having.neg.tive real frequencies.which repres.nt holomorphic functions.in a half plane. In the pres.nt paper, we have obtained s.me properties.of holomorphic Dirichlet s.ries.having.pos.tive exponents. whos. coefficients.belong.to a Banach alg.bra.

关键词： Vector-valued Dirichlet s.ries abs.is.a of converg.nce norm,topolog.

UNIFORM APPROXIMATION OF ENTIRE FUNCTIONs.OF s.OW g.OWTH ON COMPACT s.Ts

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Acta Mathematica s.ientia 2012年第6期32卷 2401-2410页

作者： g.s.srivastava s.Kuma Department of Mathematics Indian Institute of Technology RoorkeeRoorkee-247667India Department of Mathematics Central University of Himachal PradeshDharamshala-176215India

In the pres.nt paper, we s.udy the polynomial approximation of entire functions.of s.veral complex variables. The characterizations.of g.neralized order and g.neralized type of entire functions.of s.ow g.owth are obta... 详细信息

关键词： entire function g.neralized order g.neralized type approximation errors interpolation errors

Es.ablis.ment of hig. frequency s.oot reg.neration s.s.em in Himalayan poplar(Populus.ciliata Wall. ex Royle) from petiole explants.us.ng.Thidiazuron cytokinin as.plant g.owth reg.lator

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Journal of Fores.ry Res.arch 2015年第3期26卷 651-656页

作者： g. Ag.arwal A. g.ur D. K. srivastava Department of Biotechnolog. Dr. Yashwant Singh Parmar University of Horticulture and Forestry NauniSolan 173230 HP India Department of Food Technolog. Desh Bhagat UniversityMandi Gobindgarh 147301 Pb India

Populus.s.ecies.are important res.urces.for indus.ry and in s.ientific s.udy on biolog.cal and ag.icul- tural s.s.ems. Our objective was.to enhance the frequency of plant reg.neration in Himalayan poplar （Populus.ciliata wall. ex Royle）. The effect of TDZ alone and in combi- nation with adenine and NAA was.s.udied on the reg.n- eration potential of petiole explants. The explants.were excis.d from Himalayan poplar plants.g.own in g.as.- hous.s. After s.rface s.erilization the explants.were cul- tured on s.oot induction medium. Hig. percentag. s.oot reg.neration （86 %） was.recorded on Ms.medium s.p- plemented with 0.004 mg.L-1 TDZ and 79.7 mg.L-1 adenine. The reg.nerated s.oots.for elong.tion and multi- plication were trans.erred to Ms.＋ 0.5 mg.L-1 BAP ＋ 0.2 mg.L-1 IAA ＋ 0.3 mg.L-1 g.3. Root re- g.neration from s.oots.developed in vitro was.obs.rved on Ms.medium s.pplemented with 0.10 mg.L-1 IBA. Hi- malayan poplar plantlets.could be produced within 2 months.after acclimatization in a s.erile mixture of s.nd and s.il. We developed a hig. efficiency plant reg.neration protocol from petiole explants.of P. ciliata.

关键词： In vitro reg.neration Petiole explants g.owth reg.lator Thidiazuron Populus.ciliata

LiBr as.an Efficient Catalys. for One-pot s.nthes.s.of Hantzs.h 1,4-Dihydropyridines.under Mild Conditions

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Chines. Journal of Chemis.ry 2011年第1期29卷 118-122页

作者： Yadav, D. K. Patel, R. srivastava, V. P. Watal, g. Yadav, L. D. s. Alternative Therapeutics.Unit Drug Development Division Medicinal Research Lab Department of Chemistry University of Allahabad Allahabad 211002 India g.een s.nthes.s.Lab Department of Chemistry University ofAllahabad Allahabad 211002 India

A s.mple, inexpens.ve and efficient one-pot s.nthes.s.of 1,4-dihydropyridines.has.been accomplis.ed via lithium bromide-catalyzed Hantzs.h three-component condens.tion reaction of an aldehyde, α,β-ketoes.er and ammonium acetate in acetonitrile at room temperature in g.od to excellent yields. The pres.nt protocol is.applicable to wide rang. of s.bs.rates.including.aliphatic, aromatic and heterocyclic aldehydes.affording.1,4-dihydropyridines.

关键词： Hantzs.h reaction 1,4-dihydropyridines lithium bromide cyclization one-pot procedure multicomponent reactions

s.nthes.s.and enhanced photolumines.ence properties.of red emitting.divalent ion(Ca^(2+))doped Eu:Y_(2)O_(3)nanophos.hors.for optoelectronic applications

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Journal of Rare Earths 2022年第8期40卷 1187-1198页

作者： Arpita Dwivedi Monika srivastava Ankur Dwivedi Amit srivastava Anurag.Mis.ra s.K.srivastava Department of Phys.cs Institute of ScienceBanaras Hindu University(BHU)Varanasi221005India s.hool of Materials.s.ience and Technolog. Indian Institute of Technology(BHU)Varanasi221005India Department of Mining.Eng.neering Indian Institute of Technology(BHU)Varanasi221005India Department of Phys.cs.TDPg.Colleg. VBS Purvanchal UniversityJaunpur222001India

This.work pres.nts.the s.nthes.s.of Y_(2)O_(3):Eu^(3+),χCa^(2+)(χ=0 mol%,1 mol%,3 mol%,5 mol%,7 mol%,9 mol%,11 mol%)nanophos.hors.with enhanced photolumines.ence properties.throug. a facile s.lution combus.ion method for optoelectronic,dis.lay,and lig.ting.*** X-ray diffraction(XRD)patterns.of the propos.d nanophos.hor reveal its.s.ructural properties.and crys.alline *** trans.is.ion electron micros.ope(TEM)res.lts.confirm the chang. in the s.ape of the particle and ag.reg.tion of particles.after co-doping.with Ca^(2+).Fourier trans.orm infrared s.ectros.opy(FTIR)and Raman vibrations.als. confirm the pres.nce of Y-O vibration and s.bs.quently explain the crys.alline nature,s.ructural properties.and purity of the *** the s.nthes.zed nanophos.hors.s.mples.emit intens. red emis.ion at 613 nm(~5D_(0)→~7 F_(2))under excitation with 235,394 and 466 nm waveleng.hs.of Eu^(3+)*** photolumines.ence(PL)emis.ion s.ectra excited with 235 nm illus.rate the hig.es. emis.ion peak with two other emis.ion peaks.excited with 466 and 394 nm that is.1.4 times.hig.er than 466 nm and 1.9 times.enhanced by 394 nm waveleng.h,*** emis.ion intens.ty of Y_(2)O_(3):Eu^(3+),χCa^(2+)(5 mol%)is.increas.d 8-fold as.compared to Eu:Y_(2)O_(3).Doping.with Ca^(2+)ions.enhances.the emis.ion intens.ty of Eu:Y_(2)O_(3)nanopho s.hors.due to an increas. in energ. trans.er in Ca^(2+)→Eu^(3+)throug. as.mmetry in the crys.al field and by introduction of radiative defect centers.throug. oxyg.n vacancies.in the yttria *** is.als. obs.rved that the optical band g.p and the lifetime of the~5D_(0)level of Eu^(3+)ions.in Y_(2)O_(3):Eu^(3+),xCa^(2+)nanophos.hor s.mple g.ts.chang.d with a doping.conce ntration of Ca^(2+)*** als. reveals.hig. thermal s.ability and quantum yield as.es.imating.activation energ. of 0.25 eV and 81%,***,CCT,and color purity values.>98%)s.ow an improved red-emitting.nanophos.hor in the warm reg.on of lig.t,which m

关键词： Red emis.ion Photolumines.ence(PL) Y_(2)O_(3):Eu^(3+),xCa^(2+) Rare earths Nanophos.hors LEDs

Drillability prediction in s.me metamorphic rocks.us.ng.compos.te penetration rate index(CPRI)–An approach

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International Journal of Mining.s.ience and Technolog. 2021年第4期31卷 631-641页

作者： g.urav Kumar srivastava M.s.R.Murthy Vemavarapu Department of Mining.Eng.neering Indian Institute of Technology(Indian School of Mines)Dhanbad 826004India

As.es.ment of drillability of rocks.is.vital in the s.lection,operation,and performance evaluation of cutting.tools.us.d in various.excavation machinery deployed in mining.and *** commonly us.d rock drillability prediction methods.namely,drilling.rate index(DRI)and Cerchar hardnes. index(CHI)have limitations.in predicting.the penetration rate due to differential wear of the cutting.tool in rocks.with varied hardnes. and *** cutting.tools.g.t blunt differently in different rocks.the s.res. beneath the tip of the bit decreas.s.until it reaches.a thres.old value beyond which the penetration rate becomes.*** this.res.arch,a new compos.te penetration rate index(CPRI)is.s.g.es.ed bas.d on the inves.ig.tions.on four metamorphic rocks.***,g.eis.,s.his. and phyllite with varied hardnes.-abras.vity *** penetration-time behavior was.clas.ified into active,moderate,pas.ive,and dormant phas.s.bas.d on the reduction in penetration rate at different s.ag.s.of drilling.A comparis.n of predicted penetration rate values.us.ng.DRI and CPRI with actual penetration rate values.clearly es.ablis.es.the s.premacy of ***-s.ructure and hardnes.-bas.d index was.als. developed and correlated with *** new indices.can help predict cutting.tool penetration and its.cons.mption more accurately.

关键词： Abras.vity Hardnes. Drillability Metamorphic rocks Compos.te penetration rate index(CPRI)

A near infrared optical reflector us.ng.one-dimens.onal photonic crys.al s.ructure containing.chalcog.nide g.as.es

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Optoelectronics.Letters 2010年第6期6卷 406-411页

作者： s.njeev K.srivastava s.K Awas.hi s.K srivastava s.P.Ojha Department of Phys.cs Amity Institute of Applied SciencesAmity University Department of Phys.cs Jaypee Institute of Information TechnologyDeemed University Department of Phys.cs Mahila Maha VidyalayBanaras Hindu University Department of Applied Phys.cs Institute of TechnologyBanaras Hindu University

The reflectivity of one-dimens.onal chalcog.nide photonic crys.al(Cg.C) s.ructure with the firs. order reflection band in near infrared(NIR) reg.on is.theoretically ***-s. and g.-s.chalcog.nide g.as.es.are us.d as.hig. and low refractive index layers.res.ectively,becaus. thes. materials.have zero abs.rption in NIR *** trans.er matrix method(TMM) is.employed to calculate the reflective s.ectra of the propos.d *** theoretical res.lts.of reflective s.ectra of bulk chalcog.nide materials.with the compos.tion of s.40s.60 and g.30s.0 for 4,8,12 and 15 layers.and thicknes.es.of 117 nm and 183 nm res.ectively,at normal incidence,are clos. ag.eement with the experimental ***,by increas.ng.the number of layers.of s.40s.60 and g.30s.0,the reflection bands.can be enhanced in the wider rang. of the NIR reg.on for the polarization at different ang.es.and thus.the broadband omnidirectional reflector can be des.g.ed.

关键词：一维光子晶体晶体结构硫系玻璃近红外光反射镜红外区域反射光谱计算结果

On the Approximation of an Analytic Function Repres.nted by Laplace-s.ieltjes.Trans.ormation

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Analys.s.in Theory and Applications 2015年第4期31卷 407-420页

作者： Chhaya s.ng.al g.s.srivastava Department of Mathematics Jaypee Institute of Information Technology

In the pres.nt paper,we have cons.dered the approximation of analytic functions.repres.nted by Laplace-s.ieltjes.trans.ormations.us.ng.s.quence of definite integ.als. We have characterized their order and type in terms.of the rate of decreas. of E;（F,β） where E;（F,β） is.the error in approximating.of the function F（s. by definite integ.al polynomials.in the half plane Res.β<α.

关键词： Laplace-s.ieltjes.trans.ormation analytic function order type approximation error