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Direct CP violation in hadronic B decays

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Science china(Physics,Mechanics & Astronomy) 2006年第3期49卷 357-366页

作者： HONG Bihai1,2.& Lü Caidian3 1. Department of Physics, Lishui university, Lishui 32.000,china 2. Department of Physics, {2. Jiaotong university, {2. 2.0030, china 3. Institute of High Energy Physics, Beijing 100049,china Department of Physics Lishui University Lishui China Department of Physics Shanghai Jiaotong University Shanghai China Institute of High Energy Physics Beijing China

There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on kT factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories.

关键词： CP violation hadronic B decay factorization.

JACOBI SPECTRAL APPROXIMATIONS TO DIFFERENTIALEQUATIONS ON THE HALF LINE

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Journal of Computational Mathematics 2000年第1期18卷 95-112页

作者： Ben-yu Guo(Department of Mathematics, shanghai Normal university, shanghai 2.02.4, china)(COM2.AC, Pohang university of Science and Technology, Pohang, Korea) 上海师范大学上海 200234

Presents a study which investigated some Jacobi approximations which are used for numerical solutions of differential equations on the half line. Application of the approximations to problems on unbounded domains; Alg... 详细信息

关键词： Jacobi spectral approximations differential equations on the half line stability and convergence

Local connectivity of Julia sets for a family of biquadratic polynomials

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Science china Mathematics 2007年第10期50卷 1477-1492页

作者： Jing L~(1+) Wei-yuan QIU~2.~1 Department of Basic Education,shanghai Maritime university,shanghai 2.0000,china ~2.Department of Mathematics,Fudan university,shanghai 2.0433,china Department of Basic Education Shanghai Maritime University Shanghai China Department of Mathematics Fudan University Shanghai China

The local connectivity of Julia sets for the family of biquadratic polynomials f_c(z)= (z^2.2.^2.z^2.with a parameter c is *** is proved that for any parameter c,the boundary of the immediately attracting domain of f_... 详细信息

关键词： biquadratic polynomials Julia sets local connectivity

Induced electromagnetic stirring behavior in a resistance spot weld nugget

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Science china(Technological Sciences) 2010年第5期53卷 1271-1277页

作者： LI YongBing1,LIN ZhongQin1,2.LAI XinMin1,2.CHEN GuanLong1,2.& ZHANG Ke3 1 shanghai Key Laboratory of Digital Autobody Engineering,shanghai Jiao Tong {2.,shanghai 2.02.0,china 2.State Key Laboratory of Mechanical System and Vibration,shanghai Jiao Tong {2.,shanghai 2.02.0,china 3 Welding Engineering Institute,shanghai Jiao Tong {2.,shanghai 2.02.0,china shanghai Key Laboratory of Digital Autobody Engineering Shanghai Jiao Tong University Shanghai China State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai China Welding Engineering Institute Shanghai Jiao Tong University Shanghai China

A multi-physics hybrid numerical model,which couples electric,magnetic,thermal and flow fields,was used to investigate electromagnetic stirring behavior in a resistance spot weld *** differences of two kinds of different excitation inputs,i.e.,a sinusoidal current and its root-mean-square(RMS) value,were studied to examine if they could produce equivalent electromagnetic stirring effects in the weld *** showed that the two types of current inputs could produce almost identical fluid flow and heat transfer patterns and consistent evolution of flow and thermal fields in the *** the end of the welding cycles,the maximum flow velocity and temperature between the two inputs differed by 11.6% and 0.3%,***,the RMS current can be assumed to produce an approximately equivalent electromagnetic stirring effect with the sinusoidal current,and can be used in the future research to greatly improve the solution efficiency of the electromagnetic stirring behavior in the resistance spot weld nugget.

关键词： induced magnetic field electromagnetic stirring resistance spot welding fluid flow heat transfer

An Approximate Solution Technique Depending on an Artificial Parameter: A Special Example

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Communications in Nonlinear Science and Numerical Simulation 1998年第2期3卷 40-45页

作者： Jihuan HE (shanghai university, shanghai Institute of Applied Mathematics and Mechanics, shanghai 2.0072. china) shanghai university Shanghai Institute of Applied Mathematics and Mechanics Shanghai 200072 China

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｌａｓｔｔｗｏｄｅｃａｄｅｓｗｉｔｈｔｈｅｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｎｏｎｌｉｎｅａｒｓｃｉｅｎｃｅ，ｔｈｅｒｅｈａｓａｐｐｅａｒｅｄｅｖｅｒｉｎｃｒｅａｓｉｎｇｉｎｔ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｌａｓｔｔｗｏｄｅｃａｄｅｓｗｉｔｈｔｈｅｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｎｏｎｌｉｎｅａｒｓｃｉｅｎｃｅ，ｔｈｅｒｅｈａｓａｐｐｅａｒｅｄｅｖｅｒｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｏｆｓｃｉｅｎｔｉｓｔｓ...

关键词： perturbation methods homotopy Duffing equation nonlinearity

Origin of Chinese ancient glasses——study on the earliest Chinese ancient glasses

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Science china Technological Sciences 2006年第6期49卷 701-713页

作者： GAN Fuxi1,2. CHENG Huansheng1 & LI Qinghui2.1. Fudan university, 2.0 Handan Road, shanghai 2.0433,{2. 2. shanghai Institute of Optics and Fine Mechanics, CAS, P.O. Box 800-2.1, shanghai 2.1800,{2. Fudan university Shanghai China shanghai Institute of Optics and Fine Mechanics CAS Shanghai China

The earliest Chinese ancient glasses before the West Han Dynasty (2.0 BC) from different regions are studied. The glass samples were unearthed from Hunan, Hubei, Yunnan, Sichuan, Guizhou, Guangdong and Xinjiang of china. The chemical composition of these glasses samples is analyzed by proton induced X-ray emission (PIXE) technique, energy dispersive X-ray fluorescence (EDXRF) method and inductively coupled plasma atomic emission spectrometry (ICP-AES). It is shown that the glass chemical compositions belong to barium-lead silicate BaO-PbO-SiO2. potash soda lime silicate K2. (Na2.)-CaO-SiO2.(K2./Na2.>1), soda potash lime silicate Na2. (K2.)-CaO-SiO2.(K2./Na2.2.-SiO2.glass systems, respectively. The origins of the earliest Chinese ancient glasses are discussed from the archaeological and historical points of view. These four types of Chinese ancient glasses were all made in Chinese territory using local raw materials. The glass preparation technology was related to the Chinese ancient bronze metallurgy and protoporcelain glaze technology. The glass technology relationship between the East and the West is analyzed at the same time.

关键词： ancient glass glass origin chemical composition analysis.

Stearic acid protects primary cultured cortical neurons against oxidative stress

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Acta Pharmacologica Sinica 2007年第3期28卷 315-326页

作者： Ze-jian WANG~2.Cui-ling LIANG~3 Guang-mei LI~2.Cai-yi YU~2.Ming YIN~(2.4)2.School of Pharmacy,shanghai Jiao Tong university,shanghai 2.0030,china 3 Institute of Population Studies,East china Normal university,shanghai 2.0062.china School of Pharmacy Shanghai Jiao Tong University Shanghai China Institute of Population Studies East China Normal University Shanghai China

Aim:To observe the effects of stearic acid against oxidative stress in primarycultured cortical ***:Cortical neurons were exposed to glutamate,hydrogen peroxide（H2.2.,or NaN3insult in the presence or absence of *** viability of cortical neurons was determined by MTT assay and *** antioxidant enzymes activity[superoxide dismutases（SOD）,glutathione peroxidase（GSH-Px）,and catalase（CAT）] and lipid peroxidation incultured cortical neurons were evaluated using commercial kits.{3-[l（p-chloro-benzyl）-5-（isopropyl）-3-t-butylthiondol-2.yl]-2.2.dimethylpropanoic acid,Na}[MK886;5 μmol/L;a noncompetitive inhibitor of proliferator-activated receptor（PPAR）α],bisphenol A diglycidyl ether（BADGE;100 μmol/L;an antagonist ofPPARγ）,and cycloheximide（CHX;30 μmol/L,an inhibitor of protein synthesis）were tested for their effects on the neuroprotection afforded by stearic *** blotting was used to determine the PPARγprotein level in cortical ***:Stearic acid dose-dependently protected cortical neurons againstglutamate or H2.2.injury and increased glutamate uptake in cultured *** protection was concomitant to the inhibition of lipid peroxidation and to thepromotion activity of Cu/Zn SOD and CAT in cultured cortical *** effects were completely blocked by BADGE and *** with H2.2.for 2. h,the expression of the PPARγprotein decreasedsignificantly（P2.2.n the expression of PPARγcan be attenuated by stearic ***:Stearic acid can protect corticalneurons against oxidative stress by boosting the internal antioxidant *** neuroprotective effect may be mainly mediated by the activation of PPARγandnew protein synthesis in cortical neurons.

关键词： oxidative stress receptors peroxisome prolilferator-activated neurons antioxidants

cvhA Gene of Streptomyces hygroscopicus 10-2. Encodes a Negative Regulator for Mycelia Development

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Acta Biochimica et Biophysica Sinica 2006年第4期38卷 271-280页

作者： Heng-An WANG~(1,2.) Lei QIN~(2.) Ping LU~(1*) Zhi-Xuan PANG~2.Zi-Xin DENG~(3*) Guo-Ping ZHAO~(2.) 1 Biotechnology Institute,School of Agriculture and Biology,shanghai Jiaotong university,shanghai 2.1101,china 2.Laboratory of Molecular Microbiology,Institute of Plant Physiology and Ecology,shanghai Institute for Biological Sciences,Chinese Academy of Sciences,shanghai 2.0032.china 3 Bio-X Life Science Research Center,shanghai Jiaotong university,shanghai 2.0030,china. Biotechnology Institute School of Agriculture and Biology Shanghai Jiaotong UniversityShanghai 201101 China Laboratory of Molecular Microbiology Institute of Plant Physiology and Ecology Shanghai Institute for Biological Sciences Chinese Academy of SciencesShanghai 200032 China Bio-X Life Science Research Center Shanghai Jiaotong UniversityShanghai 200030 China.

A five-gene cluster cvhABCDE was identified from Streptomyces hygroscopicus *** thefirst gene of this cluster,cvhA encoded a putative sensor histidine kinase with a predicted sensor domainconsisting of two trans-membrane segments at the N-terminus and a conserved HATPasecdomain at the *** C-terminus polypeptide of CvhA expressed in Escherichia coli was purified and shown to beautophosphorylated with [γ-32.]ATP in *** phosphoryl group was acid-labile and basic-stable,whichsupported histidine as the phosphorylation *** obvious difference of mycelia development was ob-served between the null mutant of cvhA generated by targeted gene replacement and the wild-type parentalstrain 10-2. grown on solid soya flour medium with 2.-8% glucose or sucrose,but the cvhA mutant couldform much more abundant aerial mycelia and spores than the wild-type strain on solid soya flour mediumsupplemented with 6%-8% mannitol,6%-8% sorbitol,4%-6% mannose,or 4%-6% *** pheno-type was complemented by the cloned wild-type cvhA gene,and no difference was observed for growthcurves of the cvhA mutant and the wild strain in liquid minimal medium with the tested sugars at a concen-tration of 4%,6% and 8%.We thus propose that CvhA is likely a sensor histidine kinase and negativelyregulates the morphological differentiation in a sugar-dependent manner in *** 10-2..

关键词： sensor histidine kinase aerial mycelia sugar metabolism

Numerical Solution of Heat Tranfer Problemwith Flow and Solidification in Round BilletContinuous Casting of Steel

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Communications in Nonlinear Science and Numerical Simulation 1999年第3期4卷 236-239页

作者： Jiahong GUO(shanghai Institute of Applied Mathematics and Mechanics, shanghai {2.,shanghai 2.0072. china)Xin HONG(College of Material Science, shanghai {2., shanghai 2.0072. china) shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China College of Material Science Shanghai University Shanghai 200072 China

IntroductionThetechnologyofc***g,***,itisimportallttostudythep... 详细信息

IntroductionThetechnologyofc***g,***,itisimportallttostudythep...

关键词： heat transfer flow and solidification round billet continuous casting