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THEORY AND METHOD OF ELIMINATING NUMERICAL OSCILLATION OF DIFFUSION-DRIFT EQUATION

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Chinese Science Bulletin 1991年第15期36卷 1253-1256页

作者：何野曹国祥王元明 Center of Microelectronics Southeast University Nanjing 210018 PRC Department of Mathematics and Mechanics Southeast University Nanjing 210018 PRC

I. INTRODUCTIONThe classical model of semiconductor device is a convection-diffusion one. When the convective term (or drift term) dominates over the diffusive one, wiggles will appear in the numerical solution if one uses classical finite element method, finite difference method or finite box method. The phenomenon is caused by the 'negative diffusion' arising from the numerical discretization method. In order to control wiggles and improve the accuracy of the humeri-

关键词： oscillation numerical theory diffusion-drift model variation.

STUDIES ON THE ORIGIN OF SNOWBALL TEXTURE IN TANTALUM GRANITE

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Chinese Science Bulletin 1992年第1期37卷 48-51页

作者：邹海波徐洪武周新民 Department of Earth Sciences Nanjing University Nanjing 210008 PRC

Snowball texture is a unique texture developed in Tantalum granite with rare metal mineralization. That the small lath albite crystals are skirting around the quartz (sometimes orthoclase)phenocrysts and parallel to the growth faces of the quartz oikocryst is its character. This texture is particularly found in lepidolite-albite granite belt

关键词： Snowball texture Tantalum granite dissipative structure.

STUDY ON EXPERIMENTAL GEOCHEMISTRY OF Au, Sb AND W IN WATER-ROCK INTERACTION OF OPEN LOW-TEMPERATURE SYSTEM

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Chinese Science Bulletin 1992年第9期37卷 768-772页

作者：牛贺才马东升 Department of Earth Sciences Nanjing University Nanjing 210008 PRC

The stratabound gold deposits with element association of Au-Sb-W, Au-Sb, and single Au represented by the Woxi, Xichong and Mobin gold deposits respectively are widely distributed in the Proterozoic group in west Hunan Province, China. The studies on their mineral assemblage, wall-rock alteration and the physicochemical conditions under which they formed reveal that they all should belong to moderate-to low-temperature deposits and their principal mineralization was generated under low-temperature condition.

关键词： experimental geochemistry water rock interaction metallogenesis gold deposit

CALCULATION OF DEEP CRUSTAL HEAT GENERATION FROM SEISMIC SOUNDING DATA

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Chinese Science Bulletin 1992年第21期37卷 1822-1826页

作者：江屹华江集旸 Department of Earth Sciences Nanjing University Nanjing 210008 PRC Institute of Geology Academia Sinica Beijing 100029 PRC

The knowledge of radiogenic heat generation distributed in the crust is indispensable for the interpretation of terrestrial heat flow patterns and for the calculation of geothermal models; therefore, it is a key to understanding the heat flow division in the crust and upper mantle, and the thermal state of the lithosphere. The heat generation in uppermost crust is usually calculated by determining the contents of heat production elements U, Th and K

关键词： seismie velocity heat generation heat flow Shicheng-Hui’an section

POST-BURIAL CONTRACTION CRACKS IN PRECAMBRIAN ACRITARCHS

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Chinese Science Bulletin 1991年第5期36卷 400-403页

作者：张忠英刘双 Department of Earth Sciences Nanjing University Nanjing 210008 PRC

Recently, we delved into Precambrian shale-facies microfossils of China by observation from petrographic thin sections. After having examined a large number of thin sections cut parallel to lamination under the light ... 详细信息

关键词： Precambrian acritarch post-burial contraction crack.

Study of Coenzyme B_(12) Model Compounds——CNDO/2 Calculation of C_2H_5Co (SB) and RCo (salen) L Complexes

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Chinese Science Bulletin 1994年第12期39卷 1007-1010页

作者：韩德艳陈慧兰缪强俞马宏倪浩唐雯霞 Department of Chemistry State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210008 PRC Department of ChemistryHubei Normal UniversityHuangshi 435002PRC Department of Chemistry State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210008 PRC Department of Chemistry State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210008 PRC Department of ChemistryNanjing University of Science and TechnolgyNanjing 210014PRC

To synthesize and study the relation between structure and characteristics of Co-Cbond of coenzym B12 model compounds, it is an effective way to understand the fac-tors which can influence the stabilities of Co-C bond and the mechanism of mutasecatalyzed substrate rearrangement. Unfortunately knowledge about micro reaction mecha-nism of the model compounds is limited. W. N. Lipscomb calculated the

关键词： coenzyme B12 model compound Co - C bond bond order CNDO/2.

QUASILINEAR MODEL IN PHARMACOKINETICS

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Chinese Science Bulletin 1991年第20期36卷 1746-1750页

作者：丁勇 Department of Biomathematics Nanjing Medical College Nanjing 210029 PRC

In classical linear pharmacokinetics, elimination rate of drugs is regarded as a constant, so elimination of drugs is independent of dose. But recent studies have showed that it is not true for some drugs. Levy found in 1965 that the elimination of salicylamide is dosedependent and its biological half-life increases with dose. To account for this phenomenon,

关键词： quasilinear model elimination rate dose heparin.

MECHANICAL BEHAVIOUR AND INTERFACIAL PERFORMANCE OF STEEL FIBER REINFORCED SILICA FUME HIGHSTRENGTH CONCRETE

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Science China Mathematics 1992年第5期35卷 607-617页

作者：孙伟严云 Department of Civil Engineering Southeast University Nanjing 210018 PRC

In this paper, the flexural, split tensile, impact and fatigue performance of steel fiberreinforced silica fume high-strength concrete (SIFUMHSC) under static and dynamic loadsare studied. The effect of the amount of silica fume on its performance, the strengtheningeffects of silica fume particle artd steel fiber afld their composite effect are discussed. Testresults indicate to a full extent that different amounts of silica fume substituting for cementcan remarkably improve the static and dynamic mechanical behaviour of steel fiberr einforcedSIFUMHSC with other conditions unchanged and that the main reason for the change is thatthe addition of silica fume brings about a double interfacial strengthening effect of fiber-cement matrix and aggregate-cement matrix, thus improving the structure and characteristicsof the interface. When the addition of silica fume is adequate, the H_v-d, I_a-d and CHAS--dcurves tend to be horizontal, with differences disappearing between the interfacial layer andmatrix, so that the size and number of crack sources in the interfacial zone and the wholematrix become smaller and less, and strengthening effects are better deve1oped. This is thekey to the desired performance of steel fiber reinforced SIFUMHSC.

关键词： steel fiber silica fume fatigue strength high-strength concrete interfacial layer.

Characteristics of Elemental and Clay Mineralogical Composition of Some Primitive Soils From George Island, Antarctica

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Chinese Science Bulletin 1994年第17期39卷 1481-1484页

作者：潘根兴成杰民 Department of Natural Resources and Environment Sciences Nanjing Agricultural University Nanjing 210095 PRC

Following the study on the basic physicochemical properties of some primitive soils from George. Island, Antarctica, here the authors present further data of elemental and clay mineral composition in an attempt to ill... 详细信息

关键词： clay mineralogy elemental composition primitive soils Antarctica.