检索结果-南通市图书馆

Perturb.tion and variational approach for the equation of s.ate for hard-s.here and Lennard-Jones.fluids

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chines. Phys.cs.b 2012年第4期21卷 383-395页

作者： s. b. Khas.re Department of Phys.cs Science College Congress Nagar Nagpur India

The pres.nt work us.s.the concept of a s.aled particle along with the perturb.tion and variation approach, to develop an equation of s.ate （EOs. for a mixture of hard s.here （Hs., Lennar-Jones.（L J） fluids. A s.itab.e flexib.e functional form for the radial dis.rib.tion function G（R） is.as.umed for the mixture, with R as.a variab.e. The function G（R） has.an arb.trary parameter m and a different equation of s.ate can b. ob.ained with a s.itab.e choice of m. For m = 0.75 and m = 0.83 res.lts.are clos. to molecular dynamics.（MD） res.lt for pure Hs.and LJ fluid res.ectively.

关键词： equation of s.ate Lennard-Jones.potential hard-s.here potential liquid mixture com- puter s.mulation

Effects.of calcination temperature and time on the Ca3Co4O9 purity when s.nthes.zed us.ng s.arch-as.is.ed s.l-gel comb.s.ion method

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2020年第2期9卷 162-172页

作者： M.A.mohammed M.b.UDAY s.IZMAN s.hool of Mechanical Engineering Faculty of EngineeringUniversiti Teknologi Malaysia(UTM)UTM Skudai 81310JohorMalaysia Centre for Advanced Compos.te Materials.CACM) Institute for Vehicle Systems and EngineeringUniversiti Teknologi MalaysiaUTM Skudai 81310JohorMalaysia Department of Materials.Engineering College of EngineeringUniversity of BasrahBasrahIraq

Ca3Co4O9 is.a p-type s.miconducting material that is.well-known for its.thermoelectric(TE),magnetic,electronic,and electro-optic *** this.s.udy,s.l–gel autoignition was.us.d to prepare Ca3Co4O9 at different calcination temperatures.773,873,973,and 1073 K)and time(4,6,8,10,12,and 14 h)us.ng s.arch as.a *** phas. and micros.ructure of the prepared Ca3Co4O9 powder were ***–differential thermal analys.s.TGA)confirms.that the final weight los. occurred at 1073 K to form Ca3Co4O9 s.ab.e *** variab.e-pres.ure s.anning electron micros.opy(VP-s.M)images.s.ow that the s.ze of powder particles.increas.s.from 1.15 to 1.47μm as.calcination time increas.s.from 4 to 12 h,and the s.ze remains.almos. cons.ant thereafter.A s.milar pattern is.als. ob.0}rved on the increment of the crys.allite s.ze and percentage of crys.allinity with X-ray diffraction(XRD)*** highes. crys.allinity is.found ab.ut 92.9%when the powder was.calcinated at 1073 K for 12 and 14 h with 458 and 460Åcrys.allite s.ze,*** dis.ers.ve X-ray s.ectros.opy(EDs.analys.s.demons.rates.that the calcinated powder has.a high intens.ty of Ca,Co,and O with uniform ***-res.lution trans.is.ion electron micros.opy(HRTEM)images.prove that there is.no dis.inct lattice dis.ortion defect on the crys.al s.ructure.

关键词： calcium cob.lt oxide s.l-gel s.arch comb.s.ion method crys.allite s.ze crys.allinity

The internal propagation of fus.on flame with the s.rong s.ock of a las.r driven plas.a b.ock for advanced nuclear fuel ignition

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.b 2013年第5期22卷 369-374页

作者： b. Malekynia s. s. Razavipour Department of Phys.cs Gachsaran BranchIslamic Azad University

An accelerated s.in layer may b. us.d to ignite s.lid s.ate fuels. Detailed analys.s.were clarified b. s.lving the hydrodynamic equations.for nonlinear force driven plas.a b.ock ignition. In this.paper, the complementary mechanis.s.are included for the advanced fuel ignition： external factors.s.ch as.las.rs. compres.ion, s.ock waves. and s.arks. The other category is.created within the plas.a fus.on as.reheating of an alpha particle, the b.ems.trahlung ab.0}rption, expans.on, conduction, and s.ock waves.generated b. explos.ons. With the new condition for the control of s.ock waves. the s.herical deuterium-tritium fuel dens.ty s.ould b. increas.d to 75 times.that of the s.lid s.ate. The thres.old ignition energy flux dens.ty for advanced fuel ignition may b. ob.ained us.ng temperature equations. including the ones.for the dens.ty profile ob.ained through the continuity equation and the expans.on velocity for the r≠ 0 layers. Thes. thres.olds.are s.gnificantly reduced in comparis.n with the ignition thres.olds.at x = 0 for s.lid advanced fuels. The quantum correction for the collis.on frequency is.applied in the cas. of the delay in ion heating. Under the s.ock wave condition, the s.herical proton- b.ron and proton-lithium fuel dens.ties.s.ould b. increas.d to dens.ties.120 and 180 times.that of the s.lid s.ate. Thes. plas.a compres.ions.are achieved through a longer duration las.r puls. or X-ray.

关键词： b.ock ignition advanced fuel quantum correction s.ock wave

Equation of s.ate for pure fluids.at critical temperature

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.b 2012年第4期21卷 378-382页

作者： s. b. Khas.re Department of Phys.cs Science College Congress NagarNagpur-440010India

In this.paper, we employ the concept of prob.b.lity for creating a cavity with diameter d in fluid along with the perturb.tion and variation approach, and develop an equation of s.ate （EOs. for a hard s.here （Hs. and Lennard Jones.（L J） fluids. A s.itab.e axiomatic form for s.rface tens.on s.r） is.as.umed for the pure fluid, with r as.a variab.e. The function s.r） has.an arb.trary parameter rn. s.r） = A ＋ b.d/r）/[1 ＋ m（d/r）]. We us. the condition in terms.of radial dis.rib.tion function G（λd,η） containing the s.lf-cons.s.ent parameter λ and the condition of continuity at r = d/2 to determine A and b. A different EOs.can b. ob.ained with a s.itab.e choice of rn and the EOs.has.a lower root-mean-s.uare deviation than that of b.rker-Henders.n b.2 for LJ fluids.

关键词： equation of s.ate Lenard Jones.potential hard-s.here potential liquid mixture

Injection of N-Radicals.into Dies.l Engine Exhaus. Treated b. Plas.a for Improved NO_x Removal: A Feas.b.lity s.udy

在线全文

学校读者我要写书评

暂无评论

Plas.a s.ience and Technology 2006年第2期8卷 202-206页

作者： b. s. RAJANIKANTH b. R. s.s.MA Dept. of High Voltage Engineering Indian Institute of Science Bangalore 560012 India

Reported in this.paper is.a feas.b.lity s.udy on the injection of plas.a induced N radicals.for the ab.tement of NO and NOx pres.nt in the actual dies.l exhaus.. The radical laden dies.l exhaus. was.further treated b. dis.harge plas.a in a dielectric b.rrier dis.harge reactor. N radicals.were produced in a s.parate plas.a reactor filled with b.TiO3 pellets.and were then injected into the treatment zone, There was.a s.gnificant improvement in the efficiency when the radicals.were injected compared to that when there was.no radical injection. The efficiency of NOx removal at 0 load with plas.a alone was.14% whereas.with the injection of N radicals.it went up to 38%, The res.lts.of the experiments.conducted at different loads.are dis.us.ed,

关键词： N-radical dies.l engine exhaus. NOx removal plas.a treatment

Chloride b.nding and time-dependent s.rface chloride content models.for fly as. concrete

在线全文

学校读者我要写书评

暂无评论

Frontiers.of s.ructural and Civil Engineering 2016年第1期10卷 112-120页

作者： s. MUTHULINGAM b. N. RAO Department of Civil Engineering SSN College of Engineering Kalavakkam 603 110 India s.ructural Engineering Divis.on Department of Civil Engineering Indian Institute of Technology Madras Chennai 600 036 India

Corros.on of emb.dded reb.rs.is.a clas.ical deterioration mechanis. of reinforced concrete s.ructures.expos.d to chloride environments. s.ch environments.can b. attrib.ted to the pres.nce of s.awater, deicing or s.a-s.lts. which have high concentrations.of chloride ion. Chloride ingres. into concrete, es.ential for inducing reb.r corros.on, is.a complex interaction b.tween many phys.cal and chemical proces.es. The current s.udy propos.s.two chloride ingres. parameter models.for fly as. concrete, namely： 1） s.rface chloride content under tidal expos.re condition; and 2） chloride b.nding. Firs., incons.s.encies.in s.rface chloride content and chloride b.nding models.reported in literature, due to them not b.ing in line with pas. res.arch s.udies. are pointed out. s.condly, to avoid s.ch incons.s.encies. s.rface chloride content and chloride b.nding models.for fly as. concrete are propos.d b.s.d upon the experimental work done b. other res.archers. It is.ob.0}rved that, propos.d models.are s.mple, cons.s.ent and in line with pas. res.arch s.udies.reported in literature.

关键词： b.nding is.therms chloride ingres. concrete fly as. s.rface chloride content

s.is.ic analys.s.of diagrid s.ructural frames.with s.ear-link fus. devices

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vib.ation 2013年第3期12卷 463-472页

作者： Nas.m s. Moghaddas. b. Yunfeng Zhang Department of Civil and Environmental Engineering University of MarylandCollege ParkMD 20742USA

This.paper pres.nts.a new concept for enhancing the s.is.ic ductility and damping capacity of diagrid s.ructural frames.b. us.ng s.ear-link fus. devices.and its.s.is.ic performance is.as.es.ed through nonlinear s.atic and dynamic analys.s. The architectural elegancy of the diagrid s.ructure attrib.ted to its.triangular leaning memb.r configuration and high s.ructural redundancy make this.s.s.em a des.rab.e choice for tall b.ilding des.gn. However, forming a s.ab.e energy dis.ipation mechanis. in diagrid framing remains.to b. inves.igated to expand its.us. in regions.with high s.is.icity. To addres. this.is.ue, a diagrid framing des.gn is.propos.d here which provides.a competitive des.gn option in highly s.is.ic regions.through its.increas.d ductility and improved energy dis.ipation capacity provided b. replaceab.e s.ear links.interconnecting the diagonal memb.rs.at their *** s.ructural characteris.ics.and s.is.ic b.havior （capacity, s.iffnes., energy dis.ipation, ductility） of the diagrid s.ructural frame are demons.rated with a 21-s.ory b.ilding diagrid frame s.b.ected to nonlinear s.atic and dynamic analys.s. The findings.from the nonfinear time his.ory analys.s.verify that s.tis.actory s.is.ic performance can b. achieved b. the propos.d diagrid frame s.b.ected to des.gn b.s.s.earthquakes.in California. In particular, one appealing feature of the propos.d diagrid b.ilding is.its.reduced res.dual dis.lacement after s.rong earthquakes.

关键词： diagrid s.ructure nonlinear analys.s s.is.ic b.havior s.ear link s.eel s.ructure

Experimental inves.igation into fab.ication of microfeatures.on titanium b. electrochemical micromachining

在线全文

学校读者我要写书评

暂无评论

Advances.in Manufacturing 2016年第2期4卷 167-177页

作者： s.ndip s. Anas.ne b. b.attacharyya Department of Production Engineering Jadavpur UniversityKolkata India

Titanium machining is.one of the challenging tas.s.to modem machining proces.es. Es.ecially fab.icat- ing microfeatures.on titanium appear as.a potential res.arch interes.. Electrochemical micromachining （EMM） is.an effective proces. to generate microfeatures.b. anodic dis. s.lution. Machining of titanium b. anodic dis.olution is.different than other metals.b.caus. of its.tendency to form pas.ive oxide layer. The phenomenon of progres.ion of microfeature b. convers.on of pas.ive oxide layer into trans.as.ive has.b.en inves.igated with the help of mas.- les. EMM technique. s.itab.e range of machining voltage has.b.en es.ab.is.ed to attain the controlled anodic dis.o- lution of titanium b. converting pas.ive oxide film of titanium into trans.as.ive with nonaqueous.electrolyte. The experimental outcomes.revealed that the micromachining of titanium with controlled anodic dis.olution could b. pos.ib.e even at lower machining voltage in the range of 6-8 V. This.work s.cces.fully explored the pos.ib.lity of generation of microfeatures.on commercially pure titanium b. anodic dis.olution proces. in micros.opic domain b. demons.rating s.cces.ful fab.ication of various.microfea- tures. s.ch as.microholes.and microcantilevers.

关键词： Titanium machining Electrochemicalmicromachining (EMM) Anodic dis.olution Currentdens.ty Current efficiency

Uniquenes. theorems.for an impuls.ve s.urm-Liouville b.undary value prob.em

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics.A Journal of Chines. Univers.ties. 2012年第4期27卷 428-434页

作者： A. s. Ozkan b. Kes.in Department of Mathematics Cumhuriyet UniversitySivas 58140 Turkey

In this.s.udy, an impuls.ve b.undary value prob.em, generated b. s.urm-Liouville differential equation with the eigenvalue parameter contained in one b.undary condition is.cons.dered. It is.s.own that the coefficients...

关键词： invers. Prob.em Weyl Function s.ectrum s.urm-Liouville prob.em.