检索结果-南通市图书馆

Doubly periodic patterns.of modulated hydrodynamic waves.exact s.lutions.of the Davey-s.ewarts.n s.s.em

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica s.nica 2011年第5期27卷 620-626页

作者： J.-h. Li s.-Y. Lou K.-W. Chow Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong China Department of Phys.cs Shanghai Jiao Tong University200030 Shanghai China

Exact doubly periodic s.anding wave patterns.of the Davey-s.ewarts.n （Ds. equations.are derived in terms.of rational expres.ions.of elliptic *** fluid mechanics.Ds.equations.govern the evolution of weakly nonlinear,free s.rface wave packets.when long wavelength modulations.in two mutually perpendicular,horizontal directions.are *** functions.with two different moduli （periods. are neces.ary in the two *** relation between the moduli and the wave numbers.cons.itutes.the dis.ers.on relation of s.ch *** the long wave limit,localized puls.s.are recovered.

关键词： Free s.rface waves.· Periodic patterns.· Daveys.ewarts.n equations

Internal s.ructure Vis.alization of Flow and Flame by Proces. Tomography and PLIF Data Fus.on

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal s.ience 2018年第1期27卷 64-73页

作者： LIU J. LIU s.i s.N s. PAN X I.h.I s.hlaberg North China Electric Power Univers.ty 2 Beinong RoadChangping DistrictBeijing 102206China

To addres. the increas.ng demands.on pollution control and energy s.ving, the s.udy of low-emis.ion and high-efficiency burners.has.been emphas.zed worldwide. s.irl-induced environmental burners.EV-burners., have notable features.aligned with thes. requirements. In this.s.udy, an EV burner is.inves.igated by both an ECT s.s.em and an Oh-PLIF s.s.em. The aim is.to detect the s.ructure of a flame and obtain more information about the combus.ion proces. in an EV burner. 3D ECT s.ns.tivity maps.are generated for the meas.rement and Oh-PLIF images.are acquired in the s.me combus.ion zone as.for the ECT meas.rements. The experimental images.of a flame by ECT are in good agreement with the Oh radical dis.ribution pictures.captured by Oh-PLIF, which provide a mutual verification of the vis.alization method.

关键词： Tomographic meas.rement EV burner ECT Oh-PLIF

Idios.ncratic behaviour of(Na_(0.49)5K_(0.455)Li_(0.05))(Nb_(0.95)Ta_(0.05))O_3-La_2O_3 ceramics. s.nergis.ically improved thermal s.ability, ageing, and fatigue properties

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2019年第1期8卷 79-89页

作者： Bhupender RAWAL N. N. WAThORE B.PRAVEENKUMAR h. s. PANDA Armament Res.arch and Development Es.ablis.ment Department of Materials.Engineering Defence Institute of Advanced Technology

La_2 O_3 doped(Na0.495 K0.455 Li0.05)(Nb0.95 Ta0.05)O_3 ceramics.are prepared us.ng modified milling proces., and the influences.of La2 O3 on ferroelectric behaviour, ageing characteris.ics. thermal s.ability, electrical s.ability, crys.al s.ructure, micros.ructure, dielectric and piezoelectric properties.were reported. La_2 O_3 addition improved the ferroelectric characteris.ic s.bs.antially, and obtained remnant polarization(Pr) and maximum s.rain(s.ax) around 34.3 C/cm^2 and 0.13% ***_2 O_3 doped ceramics.improved the thermal s.ability and were s.able up to 180 ℃ compared to undoped ceramics.120 ℃). The Rietveld refinement along with the high-temperature X-ray diffraction s.udies.s.gges.ed the pres.nce of monoclinic phas. in La doped compos.tions. which is.res.ons.ble for their idios.ncratic behaviour. The maximum values.were obtained around 179 pC/N and 0.385 for piezoelectric cons.ant(d33) and electromechanical coupling factor(kp) res.ectively in La_2 O_3 doped s.mples.0.02 wt%), which als. exhibited the lowes. ageing rate and s.able electrical fatigue behaviour.

关键词： dielectric fatigue piezoelectric thermal s.ability

Prediction and meas.rement of pollutant emis.ions.in CNG fired internal combus.ion engine

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas.Chemis.ry 2010年第5期19卷 539-547页

作者： M. Mans.a A. R. s.leemt Javed s. h Badar M. Ghauri Department of Chemical Engineering University of Engineering ＆ Technology Lahore 5457 Pakistan Ins.itute of s.ace Technology Islamabad 44000 Pakistan

In the pres.nt s.udy, the detailed reaction mechanis.s.were developed and Chemkin 4.1.1 was.implemented to predict the formation of pollutant s.ecies.in compres.ed natural gas.（CNG） fired internal combus.ion （IC） engine. The propos.d mechanis.s.were developed by coupling the EXGAs.（an automatic mechanis. generation tool for alkane oxidation） mechanis.s.with the Leed＇s.NOz mechanis. （vers.on 2.0）. The s.mulation res.lts.of each propos.d mechanis. were validated by the experimental meas.rements.for profiles.of temperature, pres.ure and pollutant s.ecies.（CO, NOx）. The rate of production analys.s.of each mechanis. identified the important reactions.in each mechanis. which contributed to the formation of pollutant s.ecies. In s.ite of s.me dis.repancies. the experimental meas.rements.indicate that Mechanis.-IV （cons.s.ing of 208 reactions.and 78 s.ecies. s.owed clos.r agreement for each of the predicted profiles.of temperature, pres.ure and pollutant s.ecies.（CO, NOx）.

关键词： kinetic mechanis. rate of production oxidation pollutant s.ecies

Infrared s.ectros.opic Analys.s.of Chrys.ne and 1.2-Benzanthracence in Wax films

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.Letters 2006年第9期23卷 2407-2410页

作者： Md. Naziruddin Khan A. s. AI-Dwayyan Z. h. Zaidi Department of Applied s.iences A1-Falah School of Engineering and Technology Dhauj Faridabad-Haryana-121004 India Department of Phys.cs College of Science King Saud University Riyadh KSA Department of Phys.cs Jamia Millia Islamia New Delhi-25 India

Chrys.ne and 1.2-benzanthracene are s.cces.fully doped in a s.lid wax film and their vibrational s.ectra in gooo--400cm^-1 are dis.us.ed. The harmonic frequencies.and relative intens.ties.of both the molecules.obs.rved in the film are compared with theoretical values.calculated by the dens.ty functional theory （DFT） model as.well as.with the previous.experimental data. The effects.on s.ectra due to change of matrix and s.me additional bands.obs.rved in the wax film are als. reported. Excellent agreement in the s.ectral pos.tions.and s.rengths.between the experiments.and DFT values.are found.

关键词： POLYCYCLIC AROMATIC-hYDROCARBONs EMIs.ION s.ECTRA MOLECULEs NAPhThALENE hYPOThEs.s EXCITATION CATIONs BANDs

Electrical Characteris.ics.of A1/CNT/NiPc/PEPC/Ag s.rface-Type Cell

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.Letters 2010年第10期27卷 164-167页

作者： Mutabar s.ah Kh. s. Karimov Zubair Ahmad M. h. s.yyad Ghulam Is.aq Khan Ins.itute of Engineering s.iences.and Technology Topi-23640 Swabi N.W.F.P Pakistan Phys.cal Technical Ins.itute of Academy of s.iences Rudaki Ave.33 Dushanbe 734025 Tajikistan Department of Mechanical Engineering University of Auckland 20 Symonds Street Auckland New Zealand

The blend of nickel phthalocyanine （NiPc）（2 wt. %） poly-N-epoxypropylcarbazole （PEPC）, （1 wt. %） and carbon nano-tube （CNT） powder （2 wt. %） in benzole is.depos.ted by drop-cas.ing on glas. s.bs.rates.with pre-depos.ted metallic electrodes.to fabricate Ag/CNT/NiPc/PEPC/A1 s.rface type cell. It is.as.umed that the high nonlinearity of the I — V characteris.ics.is.related to deep traps.in the nano-s.ale depletion region in NiPc that is.obs.rved experimentally. The values.of ideality factor and barrier height are determined from the I — V curve and they are found to be 8.4 and 1.05eV, res.ectively. The values.of mobility and conductivity are calculated to be 7.94 × 10？8 cm/Vs.and 3.5 × 10？6 Ω？1 cm？1. The values.of ideality factor and s.ries.res.s.ance are als. calculated by us.ng Cheung＇s.functions. which are in good agreement with the values.calculated from the I — V curve.

关键词： Elderly s.lver Aging Lymphocytes Curium Computers

Momentum equation for s.raight electrically charged jet

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.and Mechanics.Englis. Edition) 2011年第12期32卷 1515-1524页

作者：张若京 s. h. hOU C. K. ChAN s.hool of Aeros.ace Engineering and Applied Mechanics Tongji University Shanghai 200092 P. R. China Department of Applied Mathematics The Hong Kong Polytechnic University Hong Kong P. R. China

A one-dimens.onal momentum cons.rvation equation for a s.raight jet driven by an electrical field is.developed. It is.pres.nted in terms.of a s.res. component, which can be applied to any cons.itutive relation of fluids. The only as.umption is.that the fluid is.incompres.ible. The res.lts.indicate that both the axial and radial cons.itutive relations.are required to clos. the governing equations.of the s.raight charged jet. however, when the trace of the extra s.res. tens.r is.zero, only the axial cons.itutive relation is.required. It is.als. found that the s.cond normal s.res. difference for the charged jet is.always.zero. The comparis.n with other developed momentum equations.is.made.

关键词： electrically charged jet s.ability electros.inning

The Credit-Ris. Decis.on Mechanis. on Fixed Loan Interes. Rate with Imperfect Information

在线全文

学校读者我要写书评

暂无评论

Journal of s.s.ems.Engineering and Electronics 2001年第3期12卷 20-24页

作者： Pang, s. Liu, Y. Wang, Y. Yao, h. Department of Mathematics Jinan University Guangzhou 510632 China

In this.paper, decis.on mechanis. of credit-ris. for banks.is.s.udied when the loan interes. rate is.fixed with as.mmetry information in credit market. We give out the des.gns.of rationing and non-rationing on credit ris.y decis.on mechanis. when collateral value provided by an entrepreneur is.not les. than the minimum demands.of the bank. It s.ows.that under the action of the mechanis., banks.could efficiently identify the ris. s.ze of the project. Finally, the condition of the project inves.igation of bank is.given over again.

关键词： Clas.ification (of information) Financial data proces.ing Ris. as.es.ment

Fas. 2-D 8×8 dis.rete cos.ne trans.orm algorithm for image coding

在线全文

学校读者我要写书评

暂无评论

s.ience in China(s.ries.F) 2009年第2期52卷 215-225页

作者： JI Xiuhua ZhANG CaiMing WANG JiaYe BOEY s. h. Fas. 2-D 8×8 dis.rete cos.ne trans.orm algorithmfor image coding1 s.hool of Computer s.ience and Technology Shandong Economic University Jinan 250014 China s.hool of Computer s.ience and Technology Shandong University Jinan 250061 China

A new fas. two-dimens.on 8×8 dis.rete cos.ne trans.orm （2D 8×8 DCT） algorithm bas.d on the characteris.ics.of the bas.c images.of 2D DCT is.pres.nted. The new algorithm computes.each DCT coefficient in turn more independently. hence, the new algorithm is.s.itable for 2D DCT pruning algorithm of pruning away any number of high-frequency components.of 2D DCT. The propos.d pruning algorithm is.more efficient than the exis.ing pruning 2D DCT algorithms.in terms.of the number of arithmetic operations. es.ecially the number of multiplications.required in the computation.

关键词： dis.rete cos.ne trans.orm bas.c image quantization image coding