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He,Ne and Ar isotop.c comp.sition of Fe-Mn crusts from the western and central p.cific Ocean and imp.ications for their g.nesis

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Science China Earth Sciences 2007年第6期50卷 857-868页

作者： g. p. glasby Dep.rtment of g.ochemistry GZG Goldschmidtstrasse 1 D-37077 Gttingen Germany

The noble g.s nuclide abundances and isotop.c ratios of the up.ost layer of Fe-Mn crusts from the western and central p.cific Ocean have been determined. The results indicate that the He and Ar nuclide abundances and isotop.c ratios can be classified into two typ.s: low 3He/4He typ. and hig. 3He/4He typ.. The low 3He/4He typ. is characterized by hig. 4He abundances of 191×10?9 cm3·STp.g.1 on averag., with variable 4He, 20Ne and 40Ar abundances in the rang. (42.8?421)×10?9 cm3·STp.g.1, (5.40?141)×10?9 cm3·STp.g.1, and (773?10976)×10?9 cm3·STp.g.1, resp.ctively. The hig. 3He/4He samp.es are characterized by low 4He abundances of 11.7×10?9 cm3·STp.g.1 on averag., with 4He, 20Ne and 40Ar abundances in the rang. of (7.57?17.4)×10?9 cm3·STp.g.1, (10.4?25.5)×10?1 cm3·STp.g.1 and (5354?9050)×10?9 cm3·STp.g.1, resp.ctively. The low 3He/4He samp.es have 3He/4He ratios (with R/RA ratios of 2.04?2.92) which are lower than those of MORB (R/R A=8±1) and 40Ar/36Ar ratios (447?543) which are hig.er than those of air (295.5). The hig. 3He/4He samp.es have 3He/4He ratios (with R/R A ratios of 10.4?12.0) slig.tly hig.er than those of MORB (R/R A=8±1) and 40Ar/36Ar ratios (293?299) very similar to those of air (295.5). The Ne isotop.c ratios (20Ne/22Ne and 21Ne/22Ne ratios of 10.3?10.9 and 0.02774?0.03039, resp.ctively) and the 38Ar/36Ar ratios (0.1886?0.1963) have narrow rang.s which are very similar to those of air (the 20Ne/22Ne, 21Ne/22Ne, 38Ar/36Ar ratios of 9.80, 0.029 and 0.187, resp.ctively), and cannot be differentiated into different g.oup.. The noble g.s nuclide abundances and isotop.c ratios, tog.ther with their reg.onal variability, sug.est that the noble g.ses in the Fe-Mn crusts orig.nate p.imarily from the lower mantle. The low 3He/4He typ. and hig. 3He/4He typ. samp.es have noble g.s characteristics similar to those of HIMU (Hig. U/p. Mantle)-and EM (Enriched Mantle)-typ. mantle material, resp.ctively. The low 3He/4He typ. samp.es with HIMU-typ. noble g.s isotop.c rati

关键词： Fe-Mn crusts noble g.ses isotop. g.ochemistry mantle heterog.neity p.cific Ocean

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Op.imisation of laser welding.p.rameters for welding.of p.2 material using. Tag.chi based g.ey relational analysis

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Defence Technolog.（防务技术） 2016年第4期12卷 343-350页

作者： Shanmug.rajan B. Rishabh SHRIVASTAVA Sathiya p. Buvanashekaran g. Welding.Research Institute Bharat Heavy Electricals Ltd. Tiruchirappalli 620014 Tamil Nadu India g. India Technolog. Centre Bangalore India Dep.rtment of p.oduction Eng.neering NIT Tiruchirappalli India

Creep.streng.h enhanced ferritic(CSEF) steels are used in advanced p.wer p.ant systems for hig. temp.rature ap.lications. p.2(Cr–W–Mo–V)steel, classified under CSEF steels, is a candidate material for p.p.ng. tubing. etc., in ultra-sup.r critical and advanced ultra-sup.r critical boiler ap.lications. In the p.esent work, laser welding.p.ocess has been op.imised for p.2 material by using.Tag.chi based g.ey relational analysis(g.A).Bead on p.ate(BOp. trials were carried out using.a 3.5 k W diffusion cooled slab CO_2 laser by varying.laser p.wer, welding.sp.ed and focal p.sition. The op.imum p.rameters have been derived by considering.the resp.nses such as dep.h of p.netration, weld width and heat affected zone(HAZ) width. Analysis of variance(ANOVA) has been used to analyse the effect of different p.rameters on the resp.nses. Based on ANOVA, laser p.wer of 3 k W, welding.sp.ed of 1 m/min and focal p.ane at-4 mm have evolved as op.imised set of p.rameters. The resp.nses of the op.imised p.rameters obtained using.the g.A have been verified exp.rimentally and found to closely correlate with the p.edicted value.? 2016 China Ordnance Society. p.oduction and hosting.by Elsevier B.V. All rig.ts reserved.

关键词： Laser Welding Op.imisation Tag.chi p.2

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Synthesis and Characterization of Some Lanthanide(Ⅲ) Comp.exes with 4-[N-(2-methoxybenzylimine)formyl]-2, 3-dimethyl-1-p.enyl-3-p.azolin-5-one

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Journal of Rare Earths 2007年第6期25卷 670-673页

作者： g. Rijulal p. Indrasenan Dep.rtment of Chemistry University of Kerala Kariavattom Campus Trivandrum-695 581 Kerala India

A series of seven novel lanthanide（Ⅲ ） nitrato comp.exes with 4-[ N-（2-methoxybenzylimine）formyl] 1-2, 3- dimethyl-1-p.enyl-3-p.azolin-5-one （2mbfa）, were synthesized. These comp.exes were characterized by elemental analysis, molecular mass determination, conductance and mag.etic moment measurements, IR, UV-visible, and ^13CNMR sp.ctral studies, In these comp.exes, the Schiff base, 2mbfa, acts as neutral bidentate lig.nd by utilizing.the carbonyl oxyg.n and azomethine nitrog.n as donor sites. All the three nitrate ions are also coordinated unidentately with 7 coordination for the lanthanide（Ⅲ） ions with a tentative monocap.ed octahedral g.ometry for the comp.exes. All the seven lanthanide（Ⅲ） comp.exes have a g.neral formula, [ Ln（2mbfa）：（NO3）3 ].

关键词： synthesis characterization lanthanide(Ⅲ) comp.exes Schiff bases rare earths

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Studies on some lanthanide（Ⅲ） comp.exes with 4-hydroxyantip.rine

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Journal of Rare Earths 2008年第3期26卷 315-319页

作者： g. Rijulal p. Indrasenan Dep.rtment of Chemistry University of Kerala Kariavattom Campus Trivandrum -695 581 Kerala India

Seven new lanthanide（Ⅲ） comp.exes with 4-hydroxyantip.rine were synthesized. These comp.exes were characterized by elemental analysis, molar conductance, mag.etic moment measurements, FT-IR, electronic and 1HNMR sp.ctra, X-ray p.wder diffraction, and thermog.avimetric studies. The lig.nd, 4-hydroxyantip.rine （hap., contained carbonyl oxyg.n and hydroxyl oxyg.n as p.tential donor sites. On coordination, dep.otonation occurred and as a result, hap.acted as a monobasic bidentate lig.nd. A coordination number 6 was assig.ed to the lanthanide（Ⅲ） ions in these comp.exes with orthorhombic structure. All the comp.exes were thermally stable-150℃ and underwent decomp.sition in three stag.s with the formation of Ln2O3 as the final residues.

关键词： synthesis lanthanide(Ⅲ) comp.exes 4-hydroxyantip.rine rare earths

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JUSTIFICATION OF A TWO-DIMENSIONAL NONLINEAR SHELL MODEL OF KOITER'S TYp.

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Chinese Annals of Mathematics,Series B 2001年第2期22卷 129-144页

作者： p. g. CIARLET A. ROQUEFORT Laboratoire d'Analyse Numérique Université Pierre et Marie Curie 4 Place Jussieu 75005 Paris France

A two-dimensional nonlinear shell model "of Koiter’s typ." has recently been p.op.sed by the first author. It is shown here that, according.to two mutually exclusive sets of assump.ions bearing.on the associated manifold of admissible inextensional disp.acements, the leading.term of a formal asymp.otic exp.nsion of the solution of this two-dimensional model, with the thickness as the "small’ p.rameter, satisfies either the two-dimensional equations of a nonlinearly elastic "membrane" shell or those of a nonlinearly elastic "flexural" shell. These conclusions being.identical to those recently drawn by B. Miara, then by V. Lods and B. Miara, for the leading.term of a formal asymp.otic exp.nsion of the solution of the equations of three-dimensional nonlinear elasticity, ag.in with the thickness as the "small" p.rameter, the nonlinear shell model of Koiter’s typ. considered here is thus justified, at least formally.

关键词： Shell model Koiter's typ. Justfication

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A cavitation ag.ressiveness index within the Reynolds averag.d Navier Stokes methodolog. for cavitating.flows

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Journal of Hydrodynamics 2015年第4期27卷 579-586页

作者： KOUKOUVINIS p. BERg.LES g. g.VAISES M. Dep.rtment of Eng.neering.and Mathematical Science City University London

The p.p.r p.op.ses a methodolog. within the Reynolds averag.d Navier Stokes（RANS） solvers for cavitating.flows cap.ble of p.edicting.the flow reg.ons of bubble collap.e and the p.tential ag.ressiveness to material damag.. An ag.ressiveness index is introduced, called cavitation ag.ressiveness index（CAI） based on the total derivative of p.essure which identifies surface areas exp.sed to bubble collap.es, the index is tested in two known cases documented in the op.n literature and seems to identify reg.ons of p.tential cavitation damag..

关键词： cavitation ag.ressiveness index(CAI) cavitation erosion multip.ase cavitating.flows

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The ap.licability of soil flushing.technolog. in a metallurg.cal p.ant

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International Journal of Coal Science & Technolog. 2018年第1期5卷 70-77页

作者： p. p. Manca p. Caredda g. Orru DICAAR Department of Civil Engineering Environmental and Architecture University of Cagliari Cagliari Italy

Soil flushing.technolog. is an ＇in situ＇ remediation technique involving.the injection of a liquid solution. Ap.lications of the soil flushing.technique dep.nd on the leachability of the p.llutants and the environmental comp.tibility and total volumes of the solutions used. Therefore, exp.riments should consider these asp.cts by simulating.the real p.enomenon and using.the most suitable reag.nts for the leachability of the different mineralog.cal forms p.esent. Thirty- one laboratory tests were carried out （in batch and becker） to the comp.ete exhaustion of the leaching.cap.city according.to p. measurements. The reaction kinetics were studied by p.oducing.more than 300 solution samp.es during.which the p.incip.l heavy metal concentrations, p. and Eh were measured. Leaching.solutions containing.various concentrations of hydrochloric, sulp.uric, nitric and acetic acids were used. Mercury was leached using.p.tassium iodide and acetic acid （p. 2）. Analytes such as arsenic, cadmium, mercury, lead, selenium and zinc p.oved to be leachable in the investig.ted soil layer. However, hig. removal efficiencies could be obtained using.different typ.log.cal solutions, concentrations and volumes. The p.p.r discusses the ap.licability of the soil flushing.technique for different heavy metal contents and p. conditions of the flushing.solution.

关键词： Soil flushing Metallurg.cal p.ant Heavy metal leaching

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Kr and Xe isotop.c comp.sitions of Fe-Mn crusts from the western and central p.cific Ocean and imp.ications for their g.nesis

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Acta Oceanolog.ca Sinica 2014年第8期33卷 26-33页

作者： BU Wenrui SHI Xuefa LI Li ZHANg.Ming.ie g.p.glasby LIU Jihua Key Laboratory of Marine Sedimentolog. & Environmental g.olog. First Institute of OceanographyState Oceanic Administration School of Resources and Environment Lanzhou University Dep.rtment of g.ochemistry Geowissenschafliches Zentrum der Universitat G?ttingen (GZG)G?ttingen 37077Germany

Kr and Xe nuclide abundance and isotop.c ratios of the up.ermost layer of Fe-Mn Crusts from the western and central p.cific Ocean have been determined. The results indicate that the Kr and Xe isotop.c comp.si-tions, like that of He, Ne and Ar, can be classified into two typ.s： low3He/4He typ. and hig.3He/4He typ.. The low3He/4He typ. crusts have low84Kr and132Xe abundance, while the hig.3He/4He typ. crusts have hig.84Kr and132Xe abundance. The82Kr/84Kr ratios of the low3He/4He typ. crusts are lower than that of the air, while the83Kr/84Kr and86Kr/84Kr ratios are hig.er than those of the air. The Kr isotop.c ratios of the hig.-er3He/4He typ. crusts are quite similar to those of the air. The128Xe/132Xe,130Xe/132Xe and131Xe/132Xe ratios of the low3He/4He typ. samp.e are distinctly lower than those of the air, whereas the129Xe/132Xe,134Xe/132Xe and136Xe/132Xe ratios are hig.er than those of the air. The low3He/4He typ. samp.es have the diag.ostic characteristics of the MORB, with excess129, 131, 132, 134, 136Xe relative to130Xe comp.red with the solar wind. The128Xe/132Xe,130Xe/132Xe and131Xe/132Xe ratios of the hig.3He/4He typ. samp.es are slig.tly hig.er than those of the air, and the129Xe/132Xe,134Xe/132Xe and136Xe/132Xe ratios are qiute similar to those of the air. The noble g.ses in the Fe-Mn crusts are derived from the lower mantle, and they are a mixture of lower mantle p.imitive comp.nent, radiog.nic comp.nent and subduction recycled comp.nent. The helium isotop.c ra-tios of the low mantle reservoir are p.edominantly controlled by p.imitive He （3He） and U and Th radiog.nic decayed He （4He）, but the isotop.c ratios of the heavier noble g.ses, such as Ar, Kr and Xe, are controlled to different extent by recycling.of subduction comp.nents. The difference of the noble isotop.c comp.sitions of the two typ. crusts is the result of the difference of the noble isotop.c comp.sition of the mantle source reservoir underneath the seamounts the crusts occurred, the noble g.s

关键词： Fe-Mn crusts Kr and Xe isotop.s mantle reservoir p.cific Ocean subduction recycling

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Modelling.evolution of bed p.ofile and g.ain size distribution in unsurveyed rivers

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International Journal of Sediment Research 2009年第2期24卷 127-144页

作者： p. RONCO g. FASOLATO g. DiSILVIO Dep.rtment of Hydraulic Maritime Environmental and Geotechnical EngineeringUniversity of Padua Dep.rtment of Hydraulic Maritime Environmental & Geotechnical EngineeringUniversity of Padua

The water flow and sediment transp.rt equations have been linearized and analytically solved under the hyp.thesis of quasi-equilibrium conditions. This solution p.rmits to reconstruct the river bathymetry from p.animetric data,the only ones available from satellite imag.s for most of the larg. rivers of the world. The linearized quasi-equilibrium solution p.ovides a criterion to evaluate the accuracy of the ap.roximate(uniform-flow) model,comp.red to the reg.lar(steady-flow) model. For non-equilibrium conditions,a further constraint on time resolution should be added,which is however g.nerally satisfied for long.term morp.olog.cal simulations. The uniform-flow solution p.esents many advantag.s which become crucial for long.term numerical comp.tations at watershed scale. The article p.ovides a detailed numerical comp.rison of the accuracy and resolution of both steadyand uniform-flow models,with an ap.lication to the evolution of the lower Zambezi River,which confirms the theoretical criterion. The accuracy of the uniform-flow solution ap.ears to imp.ove when the river is schematized with a coarse comp.tational g.id althoug.,of course,with a corresp.nding.loss of sp.tial resolution.

关键词： Morp.olog.cal data One-dimensional model Sediment transp.rt Long.term morp.odynamics Bathymetric survey Sp.ce resolution

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Op.imal Su-Do-Ku based interconnection scheme for increased p.wer outp.t from p. array under p.rtial shading.conditions

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Frontiers in Energ. 2015年第2期9卷 199-210页

作者： p. SRINIVASA RAO p. DINESH g. SARAVANA ILANg. C. NAg.MANI Dep.rtment of Electrical and Electronics Eng.neering National Instituteof Technology Tiruchirappalli 620015 India

p.rtial shading.is a common p.enomenon in p. arrays. They drastically reduce the p.wer outp.t because of mismatch losses, which are reliant on the shap. of the shade as well as the locations of shaded p.nels in the array. The p.wer outp.t can be imp.oved by distributing.the shade over various rows to maximize the current entering.the node. A Su-Do-Ku config.ration can be used to rearrang. the p.ysical locations of the p. modules in a total cross tied p. array with the electrical connections left unchang.d. However, this arrang.ment increases the leng.h of the wire required to interconnect the p.nels thus increasing.the line losses. In this p.p.r, an imp.oved Su-Do-Ku arrang.ment that reduces the leng.h of the wire required for the connection is p.op.sed. The system is desig.ed and simulated in a Matlab/Simulink environment for various shading.p.tterns and the efficacies of various arrang.ments are comp.red. The results p.ove that the p.wer outp.t is hig.er in the p.op.sed imp.oved Su-Do- Ku reconfig.ration technique comp.red to the earlier p.op.sed Su-Do-Ku technique.

关键词： array config.ration mismatch losses p.rtialshading line losses Su-Do-Ku arrang.ment

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