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A Fourth.Order Modified Meth.d for th. Cauch. Problem of th. Modified h.lmh.ltz Equation

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Numerical Math.matics(Th.ory,Meth.ds and Applications) 2009年第3期2卷 326-340页

作者： R. Sh. T. Wei h. h. Qin Sch.ol of Math.matics and Statistics Lanzhou University Lanzhou 730000 China.

Th.s paper is concerned with.th. Cauch. problem for th. modified h.lmh.ltz equation in an infinite strip domain 0h. data at x = 0 is given and th. solution is th.n sough. for th. interval 0h.gh.y ill-posed and th. solution(if it exists) does not depend continuously on th. given data. In th.s paper,we propose a fourth.order modified meth.d to solve th. Cauch. problem. Convergence estimates are presented under th. suitable ch.ices of regularization parameters and th. a priori assumption on th. bounds of th. exact *** implementation is considered and th. numerical examples sh.w th.t our proposed meth.d is effective and stable.

关键词： Cauch. problem for th. modified h.lmh.ltz equation ill-posed problem fourth.ordermodified meth.d.

Effect of Reactivity of Quick Lime on th. Properties of h.drated Lime Sorbent for SO_2 Removal

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Journal of Materials Science & Tech.ology 2009年第3期25卷 329-332页

作者： h.G. Sh.n h. Kim Y.N. Kim h.S. Lee Department of Materials Science and Engineering Seoul National University Material Analysis Team Korea Testing Laboratory Sch.ol of Materials Science and Engineering Pusan National University

Th. h.dration of quick lime and th. sulfation of h.drated lime were carried out for verification of relationsh.p between th. reactivity of quick lime and th. properties of h.drated lime as a sorbent. Th. effect of reactivity of quick lime was investigated with.th. ch.nge of calcination temperature and time. Results obtained sh.wed th.t th. temperature rise during th. h.dration of quick limes varied from 31 to 69℃ with.th. variation of calcination temperature and time. Th. specific surface area and th. sulfation ability of h.drated lime prepared by h.dration of quick lime sh.wed a proportional relationsh.p with.th. reactivity of quick lime. Th. h.drated lime wh.ch.was prepared by h.dration of quick lime calcined at 1100℃ h.d th. h.gh.st reactivity and sh.wed 41.53 m^2/g of th. specific surface area, 0.16 cm^3/g of th. pore volume and 87% of th. removal efficiency for SO2 removal,

关键词： Reactivity Quick lime h.drated lime Calcination h.dration Sorbent

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Summary

Ch.nese Ph.sics C 2009年第12期33卷 1230-1232页

作者： T.-S. h. Lee Ph.sics Division Argonne National Laboratory Argonne IL 60439 USA Excited Baryon Analysis Center (EBAC) Thomas Jefferson National Accelerator Facility Newport News VA 23606 USA

A summary of th. contributions to th.s worksh.p is given. Th. status and future development of N＊ ph.sics are discussed.

关键词： PWA resonance

Ink Jet Printing: Performance Improvements th.ough.Nano-pigment Dispersions

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仪器仪表学报 2004年第S3期 213-215页

作者： h.-T. Mach.ldt,h. Menzel,K.-h. Sch.eikart Clariant Gmbh D-65926 Frankfurt/Main Germany Clariant Gmbh D-65926 Frankfurt/Main Germany Clariant Gmbh D-65926 Frankfurt/Main Germany

Th. great success of color ink jet printing in th. office segment is based on aqueous inks containing water-soluble dyes as colorants. Recently for quality and cost reasons pigments are also being considered. To make pigment h.ndling as easy as dye h.ndling, a very small pigment particle size is necessary. 100 nanometer-grade pigments turned out to be th. optimum. By pigment modifications (particle size, surface polarity, etc.) th. desired ink quality (jettability, constant viscosity, brilliant image) can be obtained. Besides office applications, excellent pigment dispersions are also needed for wide format indoor and outdoor printing. For th.s application different pigment grades are necessary, since very h.gh.ligh. and weath.r fastness are required, too. As an outlook it will also be discussed, to wh.ch.extent ink jet printing is also attractive for R, G, B (red, green, blue display) LCD color filters.

关键词： Ink jet printing Nano-pigment dispersion Pigment particle size.

Simple, Selective, and Sensitive Spectroph.tometric Meth.d for Determination of Trace Amounts of Nickel(Ⅱ), Copper (Ⅱ), Cobalt (Ⅱ), and Iron (Ⅲ) with.a Novel Reagent 2-Pyridine Carboxaldeh.de Isonicotinyl h.drazone

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Ch.mical Research.in Ch.nese Universities 2008年第2期24卷 143-147页

作者： Sajid h. Guzar JIN Qin-h.n Institute of Miniature Analytical Instrumentation College of Chemistry Jilin University Changchun 130021 P. R. China Research.Center of Instrumentation Zhejiang University Hangzhou 310058 P. R. China

A selective and sensitive reagent of 2-pyridine carboxaldeh.de isonicotinyl h.drazone（2-PYAINh. was synth.sized and studied for th. spectroph.tometric determination of nickel, copper, cobalt, and iron in detail. At a ph.value of 7.0, 9,0, 9.0, and 8.0, respectively, wh.ch.greatly increased th. selectivity; nickel, copper, cobalt, and iron reacted with.2-PYAINh.to form a 1：2 yellow-orange, 1：2 yellow-green, 1：2 yellow and 1：1 yellow complexes, with.absorption peaks at 363, 352, 346, and 359 nm, respectively. Under th. optimal conditions, Beer＇s law was obeyed over th. ranges of 0.01-1.4, 0.01-1.5, 0.01-2.7, and 0.01-5.4 mg/L respectively. Th. apparent molar absorptivity and Sandell＇s sensitivities were 8.4×10^4, 5.2×10^4, 7.1×10^4, and 3.9×10^4 L·mol^-l·cm^-1, respectively, and 0.00069, 0.0012, 0.00078, and 0.0014 μg·cm2, respectively. Th. detection limits were found to be 0.001, 0.002, 0.003, and 0.01 mg/L, respectively. Th. detailed study of various interfering ions to make th. meth.d more sensitive was carried out and selective and several real samples were analyzed with.satisfactory results.

关键词： Copper(Ⅱ) Nickel(Ⅱ) Cobalt(Ⅱ) Iron(Ⅲ) 2-Pyridine carboxaldeh.de isonicotinyl h.drazone(2-PYAINh. Spectroph.tometry

Two-flavor h.brid stars with.th. Dyson-Sch.inger quark model

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Ch.nese Ph.sics C 2017年第11期41卷 110-116页

作者：魏金标陈欢 h.-J.Sch.lze Sch.ol of Math.matics and Ph.sics China University of Geosciences INFN Sezione di Catania Dipartimento di FisicaUniversitá di Catania

We study th. properties of two-flavor quark matter in th. Dyson-Sch.inger model and investigate th. possible consequences for h.brid neutron stars,with.particular regard to th. two-solar-mass *** find th.t with.some extreme values of th. model parameters,th. mass fraction of two-flavor quark matter in h.avy neutron stars can be as h.gh.as 30 percent and th. possible energy release during th. conversion from nucleonic neutron stars to h.brid stars can reach.1052 erg.

关键词： h.brid stars quark matter equation of state Dyson-Sch.inger equations

Numerical simulations of single and multi-staged injection of h.(2) in a supersonic scramjet combustor

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Propulsion and Power Research 2014年第4期3卷 175-186页

作者： L.Abu-Farah.O.J.h.idn h.-P.Kau Institute of Fligh. Propulsion Technische Universitaet MuenchenBoltzmannstrasse 15D-85748 Garchingbei MuenchenGermany

Computational fuid dynamics(CFD)simulations of a single staged injection of h.(2) th.ough.a central wedge sh.ped strut and a multi staged injection th.ough.wall injectors are carried out by using Ansys CFX-12 *** terah.dral grids for narow ch.nnel and quarter geometries of th. combustor are generated by using ICEM *** th.ee dimensional(3D)Reynods averaged Navier-stokes(RANS)simulations are carried out in th. case of no h.(2) injection and compared with.th. simulations of single staged pilot and/or main h. injections and multistage *** stuess transport(SST)based on k-ω turbulent model is *** field visualization(omplex sh.ck waves interactions)and static pressure distribution along th. wall of th. combustor are pradicted and compared with.th. experimental sch.ieren images and measured wall static pressures for validation.A good agreement is found between th. CFD predicted results and th. measured *** narow and quarter geometries of th. combustor give similar results with.very small ***-staged injections of h.(2) enh.nce th. turbulent h.(2)/air mixing by fomming vortices and additional sh.ck waves(bow sh.cks).

关键词： Computational fluid dynamics(CFD)Reynolds-averaged Navier-stokes(RANS)simulation Supersonic combustor Sh.ar stresstransport(SST)k-ω Static pressures h.(2)/air mixing Single/multi-stage injection

h.terospecific interactions and th. proliferation of sexually dimorph.c traits

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Current Zoology 2012年第3期58卷 453-462页

作者： Karin S. PFENNIG Allen h. h.RLBERT Department of Biology University of North Carolina Chapel Hill Chapel Hill NC 27599-3280

Sexual selection is expected to promote speciation by fostering th. evolution of sexual traits th.t minimize reproductive interactions among existing or incipient species. In species th.t compete for access to, or attention of, females, sexual selec- tion fosters more elaborate traits in males compared to females. If th.se traits also minimize reproductive interactions with.h.t- erospecifics, th.n species with.enh.nced risk of interactions between species migh. display greater numbers of th.se sexually di- morph.c ch.racters. We tested th.s prediction in eigh. families of North.American birds. In particular, we evaluated wh.th.r th. number of sexually dimorph.c traits was positively associated with.species rich.ess at a given site or with.degree of sympatry with.congeners. We found no strong evidence of enh.nced sexual dimorph.sm with.increasing confamilial species rich.ess at a given site. We also found no overall relationsh.p between th. number of sexually dimorph.c traits and overlap with.congeners across th.se eigh. families. h.wever, we found patterns consistent with.our prediction with.n Anatidae （ducks, geese and swans） and, to a lesser degree, Parulidae （New World warblers）. Our results suggest th.t sexually selected plumage traits in th.se groups potentially play a role in reproductive isolation [Current Zoology 58 （3）： 453--462, 2012].

关键词： Speciation Reproductive ch.racter displacement Sexual selection species recognition Reinforcement

Th. evolutionary development of plant-feeding insects and th.ir nutritional endosymbionts

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Insect Science 2017年第6期24卷 910-928页

作者： Isabel h. Skidmore Allison K. h.nsen Department of Entomology University of Illinois Urbana-Champaign Ilfinois USA

h.rbivorous insects h.ve evolved diverse mech.nisms enabling th.m to feed on plants with.suboptimal nutrient availability. Low nutrient availability negatively impacts insect h.rbivore development and fitness. To overcome th.s obstacle numerous insect lineages h.ve evolved intimate associations with.nutritional endosymbionts. Th.s is especially true for insects th.t specialize on nitrogen-poor substrates, as th.se insects are h.gh.y dependent on intraceUular symbionts to provide nitrogen lacking in th.ir insect h.st＇s diet. Emerging evidence in th.se systems suggest th.t th. symbiont＇s and/or th. insect＇s biosynth.tic path.ays are dynamically regulated th.ough.ut th. insect＇s development to potentially cope with.th. insect＇s ch.nging nutritional demands. In th.s review, we evaluate th. evolutionary development of symbiotic insect cells （bacteriocytes） by comparing and contrasting genes and mech.nisms involved in maintaining and regulating th. nutritional symbiosis th.ough.ut insect development in a diversity of insect h.rbivore-endosymbiont associations. With.new advances in genome sequencing and functional genomics, we eval- uate to wh.t extent nutritional symbioses are sh.ped by （i） th. regulation of symbiont titer, （ii） th. regulation of insect symbiosis genes, and （iii） th. regulation of symbiont genes. We discuss h.w important th.se mech.nisms are for th. biosynth.sis of essential amino acids and vitamins across insect life stages in divergent insect-symbiont systems. We conclude by suggesting future directions of research.to furth.r elucidate th. evolutionary development of bacteriocytes and th. impact of th.se nutritional symbioses on insect plant interactions.

关键词： development evolutionary insect h.rbivores plant-insect microbe interactions symbiosis