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Nucleon tr.nsition for. factor. at JLab:status and outlook

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Chinese Physics C 2009年第12期33卷 1216-1221页

作者： r. W. Gothe Univer.ity of South Car.lina Columbia SC 29208 USA

The measur.ments of exclusive single-meson and double-pion electr.-pr.duction cr.ss sections off the pr.ton to study nucleon r.sonances will be extended to higher.momentum tr.nsfer. with the CLAS12 detector.and the ener.y upgr.ded CEBAF beam. Based on new theor.tical developments to extr.ct and inter.r.t the electr.magnetic tr.nsition for. factor. and on the exper.ence gained fr.m the most r.cent r.sults, the newly for.ed collabor.tion of exper.mentalists and theor.sts shall enable us to pr.vide unpr.cedented high- pr.cision data, high-quality analyses, and state-of-the-ar. model and QCD based calculations in a Q2 domain up to 10 GeV2. For.the fir.t time nucleon r.sonance str.ctur.s will be studied at still unexplor.d distance scales, wher. the dr.ssed quar. contr.butions ar. the dominating degr.es of fr.edom and their.str.ng inter.ction is r.sponsible for.the gr.und and excited nucleon state for.ation. These studies also open up a pr.mising oppor.unity to under.tand the or.gin of mor. than 98% of the nucleon mass that is cr.ated by str.ng fields pr.dominantly at these distance scales by dr.ssing the cur.ent quar.s.

关键词： bar.on str.ctur. str.ng degr.es of fr.edom

Pr.ducts of Distr.butions,Conser.ation Laws and the Pr.pagation of δ'-Shock Waves

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Chinese Annals of Mathematics,Ser.es B 2012年第3期33卷 367-384页

作者： Car.os Or.ando r. SAr.ICO CMAF University of LisbonAv.Prof.Gama Pinto 21649-003Portugal

This paper.contains a study of pr.pagation of singular.tr.velling waves u（x, t） for.conser.ation laws ut ＋ [Ф（u）]x = ψ（u）, wher. Ф, ψ ar. entir. functions taking r.al values on the r.al axis. Conditions for.the pr.pagation of wave pr.files β ＋ mδ and β ＋ mδt ar. pr.sented （β is a r.al continuous function, m ≠ 0 is a r.al number.and δ＇ is the der.vative of the Dir.c measur. 5）. These r.sults ar. obtained with a consistent concept of solution based on our.theor. of distr.butional pr.ducts. Bur.er. equation ut ＋（u2/2）x = 0, the iffusionless Bur.er.-Fischer.equation ut ＋ a（u2/2）x = r.（1 - u/k） with a, r. k being positive number., Leveque and Yee equation ut ＋ ux = μx（1 - u）（u - u/k） with μ ≠ 0, and some other.examples ar. studied within such a setting. A ＂tool box＂ sur.ey of the distr.butional pr.ducts is also included for.the sake of completeness.

关键词： Conser.ations laws Tr.velling waves δ^-shock waves δ-shock waves δ-solitons Pr.pagation of distr.butional wave pr.files

λ-STATISTICAL CONVEr.ENCE OF Or.Er.α

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Acta Mathematica Scientia 2011年第5期31卷 953-959页

作者： r.olak .A.Bekta■ Depar.ment of Mathematics Fir.t Univer.ity

In this paper.we intr.duce the concept of λ-statistical conver.ence of or.er.α.Also some r.lations between the λ-statistical conver.ence of or.er.α and str.ng（V,λ）-summability of or.er.α ar. given.

关键词： sequences statistical conver.ence Cesàr. summability

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Subsidence histor. and for.ing mechanism of anomalous tectonic subsidence in the Bozhong depr.ssion, Bohaiwan basin

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Science China Ear.h Sciences 2007年第9期50卷 1310-1318页

作者： MüLLEr.r. Dietmar School of Geosciences University of Sydney Sydney NSW 2006 Australia

The Bozhong depr.ssion of the Bohaiwan basin belongs to a family of extensional basins in East China, but is quite differ.nt fr.m other.par.s of the basin. The Cenozoic subsidence of the depr.ssion is contr.lled by a combination of lithospher.c thinning and polycyclic str.ke-slip movements. Thr.e episodic r.fts have been identified, i.e. Paleocence-ear.y Eocene, middle-late Eocene and Oligocene age. The depr.ssion under.ent syn-r.ft and post-r.ft stages, but two episodic dextr.l movement events of the str.ke-slip faults modify the subsidence of the Bozhong depr.ssion since the Oligocene. The ear.y dextr.l movement of the Tan-Lu fault associated with cr.stal extension r.sulted in acceler.ted subsidence dur.ng the time of deposition of the Dongying For.ation with a maximum thickness of 4000 m. A late r.activation of dextr.l movement of the Tan-Lu fault began in late Miocene (about 12 Ma), which r.sulted in the intense subsidence of Minghuazhen For.ation and Quater.ar.. In addition, dynamic mantle convection-dr.ven topogr.phy also acceler.ted the post-r.ft anomalous subsidence since the Miocene (24.6 Ma). Our.r.sults indicate that the pr.mar. contr.l on r.pid subsidence both dur.ng the r.ft and post-r.ft stages in the Bozhong depr.ssion or.ginates fr.m a combination of multiple episodic cr.stal extension and polycyclic dextr.l movements of str.ke-slip faults, and dynamic topogr.phy.

关键词： tectonic subsidence str.ke-slip dynamic topogr.phy Bozhong depr.ssion Bohaiwan basin

Complicated r.sponses of stalagmite δ ^(13)C to climate change dur.ng the last glaciation fr.m Hulu Cave, Nanjing,China

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Science China Ear.h Sciences 2005年第12期48卷 2174-2181页

作者： r. L. Edwar.s Depar.ment of Geology and Geophysics University of Minnesota MN 55455 USA

We pr.sent a r.cor. on car.on stable isotopic composition (δ 13C), cover.ng 75 thr.ugh 10 thousands year. ago (ka B.P.), fr.m Hulu Cave, Nanjing. The over.apping δ 13C pr.-files ar. ver. similar.in patter. and r.nge, indicating that they mainly r.cor. climatic signal. Dur.ing the last glacial-inter.lacial tr.nsition, the >6‰ change of δ 13C values implies differ.nt con-tr.butions of C3 vs. C4 type plants in soils. On millennial scale, however. the incr.ased calcite δ 13C dur.ng the war. Dansgaar.-Oeschger.(DO) events suggests a decr.ase of dissolved bio-genic CO2 when water.flux r.te thr.ugh soil is lar.e. This cor.elation between heavier.δ 13C and higher.pr.cipitation is consistent with our.pr.vious r.por. on the samples’ stable oxygen isotope r.cor.s (Wang et al., 2001). Compar.son of coeval δ 13C and δ 18O of stalagmites indicates that kinetic fr.ctionation of car.on isotope is closely r.lated to gr.wth r.te of stalagmites. This study also shows that local vegetation changes may lag behind pr.cipitation changes by ~700 year. dur.ng the deglaciation.

关键词： Hulu Cave stalagmite δ 13C last glacial per.od.

Appr.aching nuclei thr.ugh multiple per.pectives and diver.e models： Patter.s, symmetr.es, inter.ctions

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Fr.ntier. of physics 2018年第6期13卷 29-38页

作者： r. F. Casten Wr.ght Nuclear.Str.ctur. Labor.tor. Yale University New Haven CT 06520 USA Michigan State Univer.ity- Fr.B East Lansing MI USA

Nuclei ar. complex objects yet display r.mar.able simplicities and r.gular.patter.s. The study of these and their.or.gins has long been one of the twin pillar. of nuclear.str.ctur. r.sear.h. We will discuss the behavior.of atomic nuclei fr.m this point of view. A key element will be the advantages of looking at the same data fr.m differ.nt per.pectives and of inter.r.lating these per.pectives.

关键词： nuclear.str.ctur. simple patter.s and symmetr.es diver.e per.pectives and models emer.ence of collectivity r.sidual inter.ctions

An exceptionally str.ngthened East Asian summer.monsoon event between 19.9 and 17.1 ka BP r.cor.ed in a Hulu stalagmite

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Science China Ear.h Sciences 2009年第3期52卷 360-368页

作者： L. r. EDWAr.S Depar.ment of Geology and Geophysics University of Minnesota Minneapolis

A stalagmite-based isotope r.cor. (No. H82) fr.m Nanjing Hulu Cave, spanning fr.m 16.5 to 10.3 ka BP, pr.vided str.ng evidence for.a coher.nce r.lation between the East Asian summer.monsoon (EASM) and the Nor.h Atlant... 详细信息

关键词： Nanjing Hulu Cave stalagmite East Asian summer monsoon event

On Annihilator.Ideals of Pseudo-differ.ntial Oper.tor.r.ngs

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Algebr. Colloquium 2015年第4期22卷 607-620页

作者： r. Manaviyat A. Moussavi Depar.ment of Pur. Mathematics Faculty of Mathematical Sciences Tarbiat Modares University P.O. Box 14115-134 Tehran Iran

Let r.be a r.ng with a der.vation 5 and r.（x-1;5）） denote the pseudo- differ.ntial oper.tor.r.ng over.r. We study the r.lations between the set of annihilator. in r.and the set of annihilator. in r.（x-1; 5））. Among applications, it is shown that for.an Ar.endar.z r.ng r.of pseudo-differ.ntial oper.tor.type, the r.ng r.（x-1; 5）） is Baer.（r.sp., quasi-Baer. PP, r.ght zip） if and only if r.is a Baer.（r.sp., quasi-Baer. PP, r.ght zip） r.ng. For.a 5-weakly r.gid r.ng r. r.（x-1;5）） is a left p.q.-Baer.r.ng if and only if r.is left p.q.-Baer.and ever. countable subset of left semicentr.l idempotents of r.has a gener.lized countable join in r.

关键词： pseudo-differ.ntial oper.tor.r.ng annihilator.ideal Baer.r.ng quasi-Baer.ing Ar.endar.z-like condition

Complementar.ty of CFD,exper.mentation and r.actor.models for.solving challenging fluidization pr.blems

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Par.icuology 2010年第6期8卷 498-500页

作者： John r. Gr.ce Tingwen Li Depar.ment of Chemical and Biological Engineer.ng University of British Columbia Vancouver V6T 1Z3 Canada National Ener.y Technology Labor.tor. 3610 Collins Ferry Rd Morgantown WV26507 USA

Exper.mentalists, numer.cal modeller. and r.actor.modeller. need to wor. together. not only just for.validation of numer.cal codes, but also to shed fundamental light on each other.s pr.blems and under.ying assumptions. Sever.l examples ar. given, Exper.mental gas axial disper.ion data pr.vide a means of choosing the most appr.pr.ate boundar. condition （no slip, par.ial slip or.full slip） for.par.icles at the wall of fluidized beds. CFD simulations help to identify how close ＂two-dimensional＂ exper.mental columns ar. to being tr.ly two-dimensional and to r.pr.senting thr.e-dimensional columns. CFD also can be used to pr.vide a mor. r.tional means of establishing assumptions needed in the modelling of two-phase fluidized bed r.actor., for.example how to deal with cases wher. ther. is a change in molar.flow （and hence volumetr.c flow） as a r.sult of chemical r.actions.

关键词： Fluidization Mixing Computational Fluid dynamics Wall slip r.actor.modelling Volume change