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INCOHERENT SCATTERING FROM A MAGNETIZED PLASMA

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作者： Bin Wang Department of physics. fudan university shanghai 2004.3 P. R. china

＜正＞We discuss the relation between bulk de Sitter spacetime and the corresponding conformal field theory at the boundary, in the framework of the exact quasinormal mode spectrum. We show that the quasinormal mode spectrum corresponds exactly to the spectrum of thermal excitations of Conformal Field Theory at the past boundary I-, together with the spectrum of a Conformal Field Theory at the future boundary I+.

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Science in china,Ser.A 1987年第6期30卷 601-606页

作者：陆全康陈虹王文华尹琦 Department of physics fudan university shanghai

Incoherent scattering is determined by the spectral density of electron-density fluctuations. The scattering spectrum has previously been calculated for the plasma with respect to the Coulomb interactions. On the basis of complete electromagnetic interactions of plasma, a general expression for the electrondensity fluctuations and the spectrum of laser wave scattering from a magnetized plasma is derived.

关键词： test INCOHERENT SCATTERING FROM A MAGNETIZED PLASMA

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Ta_2O_5/Ta界面分析的新模型

物理学报 1989年第11期38卷 1771-1777页

作者：陆明张强基复旦大学现代物理研究所

对Ta_2O_5/Ta样品界面区的深度剖面曲线进行了研究。基于离子溅射引起影响层存在的考虑,提出一种解释该曲线的新模型。通过此模型能很好地拟合实验曲线,并反映了溅射过程中的离子混合效应、原子堆积效应及相应的特征参数。样品由阳极氧... 详细信息

对Ta_2O_5/Ta样品界面区的深度剖面曲线进行了研究。基于离子溅射引起影响层存在的考虑,提出一种解释该曲线的新模型。通过此模型能很好地拟合实验曲线,并反映了溅射过程中的离子混合效应、原子堆积效应及相应的特征参数。样品由阳极氧化法制得,其厚度为500埃。表面分析在PHI-590型扫描俄歇微探针上完成,所有测量均在室温下进行。研究表明:深度剖面曲线并不符合误差函数分布;影响层的厚度为30—50埃,它是进行深度剖面分析时,决定元素俄歇信号强度的第一位重要因素;深度剖面分析的分辨率由离子混合效应和原子堆积效应的折衷结果而决定。

关键词： Ta2O5/Ta 界面分析模型

DYNAMICS IN A CLASS OF NEURON MODELS

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Annals of Differential Equations 2009年第1期25卷 67-73页

作者： Wang Junping (Dept. of Math. and physics, shanghai university of Electric Power, shanghai 200090) Ruan Jiong (School of Math. Sciences,{4., shanghai 2004.3) Dept. of Math. and physics Shanghai University of Electric Power Shanghai 200090 School of Math. Sciences Fudan University Shanghai 200433

In this paper, we investigate the dynamics in a class of discrete-time neuron mod-els. The neuron model we discussed, defined by such periodic input-output mapping as a sinusoidal function, has a remarkably larger memory capacity than the conven-tional association system with the monotonous function. Our results show that the orbit of the model takes a conventional bifurcation route, from stable equilibrium, to periodicity, even to chaotic region. And the theoretical analysis is verified by numerical simula...

关键词： discrete-time neuron model periodic activation function periodic-doubling bifurcation anti-integrable limit method chaos

Impact of the closure of Indonesian seaway on climate: A numerical modeling study

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Chinese Science Bulletin 2003年第S2期48卷 88-93页

作者： YU Yongqiang, ZHOU Zuyi & ZHANG Xuehong 1. LASG, Institute of Atmospheric physics, Chinese Academy of Sciences, Beijing 100029, china: 2. Laboratory of Marine Geology, Tongji university, shanghai 200092 china Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China Tongji Univ Lab Marine Geol Shanghai 200092 Peoples R China

Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14.MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the effect of the north shift of Australian continent onthe tropical oceanic circulation, especially the formation ofthe western Pacific warm pool. The numerical experimentsof the individual OGCM forced by the modern atmosphericcirculation indicate that the closure of Indonesian passageresults in warming in the tropical Pacific Ocean and coolingin the tropical Indian Ocean; furthermore, it also results inchange in source of the Indonesian Through Flow (ITF) wa-ter, e.g. ITF mainly originates from the south Pacific at 14.aBP, but it mainly originates from the north Pacific *** coupled model shows similar results as the individualOGCM qualitatively.

关键词： Indonesian Through Flow (ITF) Western Pacific Warm Pool Australian Plate Paleo-oceanography.

Speciation of the elements and compositions on the surfaces of dust storm particles:The evidence for the coupling of iron with sulfur in aerosol during the long-range transport

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Chinese Science Bulletin 2005年第8期50卷 738-744页

作者： ZHANG Xingying1,2, ZHUANG Guoshun1,2,3, CHEN Jianmin2 & XUE Huaxin2 1. Center for Atmospheric Environment Study, Department of Chemistry, Beijing Normal university, Beijing 100875, china 2. Center for Atmospheric Chemistry Study, Department of Environ- mental Science and Engineering, fudan university, shanghai 2004.3, china 3. LAPC/NZC, Institute of Atmospheric physics, NZC/LAPC, Chinese Academy of Sciences, Beijing 100029, china Center for Atmospheric Environment Study Department of Chemistry Beijing Normal University Beijing 100875 China Center for Atmospheric Chemistry Study Department of Environmental Science and Engineering Fudan University Shanghai 200433 China LAPC/NZC Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The speciation of the elements on the surface of the particles collected during dust storm and non-dust storm in Beijing and Inner Mongolia was studied by XPS. The ma- jor species of iron on the surface were oxides, sulfate, silicate, FeOOH and minor part sorbed on SiO2/Al2O3. Sulfate is the dominant species of sulfur on the surface. SiO2 and Al2O3 are the main components of Si and Al on the surface respectively. One of the most important findings was that the Fe(II) (FeS and FeSO4. produced could account for up to 4..3% and 4..6% of the total Fe on the surface in the aerosol sample collected at that night and next day of the “peak” time of the dust storm occurring on March 20, 2002, while Fe2(SO4.3, one of the Fe(III) species on the surface decreased from 67.1% to 4..5% and 4..0% respectively. Both S and Fe en- riched on the surface of aerosol particles. Fe(II) accounted for 1.3%?5.3% of total Fe in bulk aerosol samples during dust storm. These results provided strong evidence to sup- port the hypothesis of the coupling between iron and sulfur in aerosols during the long-range transport, which would have important impact on the global biogeochemical cycle.

关键词：物种形成原理 XPS 大气悬浮物 Fe-S结合粒子集合

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氢在担载金属表面的吸附研究

物理学报 1993年第11期42卷 1816-1821页

作者：谢剑钧张涛路文昌河南师范大学物理系新乡453002 复旦大学物理系上海200433

应用格林函数方法在紧束缚近似下研究了氢在担载金属表面的吸附性质。采用自洽的Anderson-Newns吸附模型,对氢在Pt/ZnO,Cu/ZnO和Ni/ZnO三种担载式复合体系表面的吸附能△E、吸附态能级E_(ad)作了计算,并讨论了金属簿层在ZnO衬底上的沉... 详细信息

应用格林函数方法在紧束缚近似下研究了氢在担载金属表面的吸附性质。采用自洽的Anderson-Newns吸附模型,对氢在Pt/ZnO,Cu/ZnO和Ni/ZnO三种担载式复合体系表面的吸附能△E、吸附态能级E_(ad)作了计算,并讨论了金属簿层在ZnO衬底上的沉积厚度及金属-衬底相互作用对氢在该类复合体系表面的吸附性质的影响。计算表明,金属-衬底相互作用越强,氢在Pt(Cu,Ni)/ZnO体系表面的吸附能及电荷转移量越小。金属-衬底相互作用抑制了氢在金属表面的吸附。衬底对金属表面吸附性质的影响随金属层厚度的增加而减弱。

关键词：氢金属吸附格林函数

Assessment of Cancellous Bone Status Using the UltrasonicBackscattered Spectral Maximum Shift

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Assessment of Cancellous Bone Status Using the UltrasonicBac...

An ESR Study on Singlet Oxygen Photoproduction of the Meso-Tetrakis-(Substituted Phenyl) Porphine Derivatives

第2届世界华人生物医学工程研讨会

作者： De-an TWeiqi WangYuanyuan Wang (Department of Electronic Engineering fudan university shanghai 2004.3 china) ( State Key Laboratory of {4. Acoustics Nanjing university Nanjing 210093 china)

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Chemical Research in Chinese Universities 1990年第4期6卷 313-316页

作者： Chen Jiyao, -Lu Yameng, Chen Shiming and Cai Hualxin (Department of physics and Center of Analysis and Measurements, fudan university, shanghai)Xu Deyu and Wang Shaoyin (Research Laboratory of Antimalaria Pharmaceuticals, No. 2 Military Medical university, shanghai)

The ability of meso-tetrakis- (substituted phenyl) porphine derivatives for photo-generating singlet oxygen (O2) is studied by ESR spectrometry. The results show that the singlet oxygen yields of most of porphine derivatives are higher than that of HPD. It is also exhibited that the nature and structure of the substituent at the meso position are closely related to the photo-sensitizing ability of meso-tetrakis-(substituted phenyl) porphine.

关键词： Porphine Singlet oxygen ESR