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Numerical study of rapid cyclogenesis over sea

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Acta Oceanologica Sinica 1989年第1期8卷 51-62页

作者： Du Jun and Yu Zhihao department of Atmospheric sciences, nanjing university, nanjing, china Dept. of Atmospheric sciences Nanjing Univ Nanjing China. China

A five-layer primitive equation model was used in the study of rapid cyclogenesis over sea. The numerical simulations show that'the Tibetan Plateau, large-scale baroclinicity and heat flux from the sea surface are the three important agents to produce cyclonic vorticity along the east coast of china. The diagnostic computation of a 24 h control simulation indicates that the nonlinear vorticity advec-tion, baroclinicity and diabatic heating are also responsible for the development of the extratropical cyclones over seas.

关键词： Numerical study of rapid cyclogenesis over sea over

In－situ　Thin　Layer　Spectroelectrochemical　Study　of　the　Redox　Mechanism　add　Intermediate　for　Vitamin　B_2　in　Aqueous　Solution

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Chinese Chemical Letters 1996年第9期7卷 825-828页

作者： Yong Jun MA Shi Min ZHU(department of Chemistry, nanjing university,nanjing,210093) department of Chemistry Nanjing University Nanjing 210093

The electrochemical reaction mechanism of Vitamin B2 on platinum electrode in acid aqueous solution has been studied by then layer cyclic voltammetry(TLCV) and thin layer spectroelectrochemistry (TLSEC).The results indicate that there is a redox process of VB2 via a semiquinone radical to dihydroflavin. The radical intermediate has been detected by in-situ UVSEC method for the first time.

关键词： Thin Layer Aqueous Intermediate

Extraction of the spectral information of terahertz signals using superconducting Josephson junction

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Science china(Technological sciences) 2010年第5期53卷 1247-1251页

作者： XU WeiWei,CHEN Jian,KANG Lin & WU PeiHeng department of Electronic Science & Engineering,nanjing university,nanjing 210093,china 1. department of Electronic Science & Engineering Nanjing University Nanjing 210093 China

Using YBa2Cu3O7-δ/MgO bicrystal Josephson junction,we have developed a setup for spectrum analyses of terahertz signals,up to 2.5 THz,with a frequency resolution of 3 *** junction works at liquid nitrogen temperature when the signal frequencies are low while for signals at 1.6 THz and 2.5 THz the junction is cooled to 6 *** signal processing(DSP) chips are made use of to build a data acquisition and processing system so that it can be compact,fast,and *** the completion of the relevant hardwares and softwares,the measurements are now automated.

关键词： Josephson junction THz wave spectrum detection DSP technology

Effects　of　copper，manganese　and　pH　on　the　growth　and　several　enzyme　activities　of　mycorrhizal　fungus　Cenococcum　geophilum　Fr．

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Journal of Environmental sciences 1996年第4期8卷 419-425页

作者： Kong Fanxiang Zhang Min(department of Environmental Science and Engineering, nanjing university,nanjing 210093,china) department of Environmental Science Nanjing University Nanjing 210093 China

he effects of various concentrations of copper,manganese and ph on the growth,protein content and several enzyme activities of mycorrhizal fungus Cenococcum geophilum Fr. Were *** results showed that high concentration of copper (20 mg/L)and low ph (3.0-4.0) inhibited the mycelial growth (dry weight), however, the protein content increased or not significantly reduced in mycelia after copper or manganese was applied. The activities of acid phosphatase and α-mannosidase were induced by high concentration of Mn (200-400 mg/L);but the activities of G6PDH, MTLDH and trehalase were inhibited by high content of copper(10-20 mg/L),both of the responses of these enzymes and mycelial growth under the presence of copper were correlative each other. Measurement of these enzyme activities might therefore provide a useful criterion for the evaluation of the fungitoxicity of soil contaminated by copper.

关键词： copper manganese ph mycorrhizal fungus enzyme activity.

LIMIT CYCLES AND BIFURCATION CURVES FOR THE QUADRATIC DIFFERENTIAL SYSTEM (III)_(m=0) HAVING THREE ANTI-SADDLES (I)

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Chinese Annals of Mathematics,Series B 1996年第2期17卷 167-174页

作者： YE YANQIAN department of Mathematics, nanjing university, nanjing 210008, china. 南京大学数学系江苏南京

For the quadratic system: x=-y+δx + lx2 + ny2, y=x(1+ax-y) under conditions -10 the author draws in the (a, ()) parameter plane the global bifurcationdiagram of trajectories around O(0,0). Notice that when na2+l < 0 ... 详细信息

关键词： Quadrtic systen Anti-saddle Bifurcation curve Limit cycle

A COLUMN RECURRENCE ALGORITHM FOR SOLVING LINEAR LEAST SQUARES PROBLEM

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Journal of Computational Mathematics 1996年第4期14卷 301-310页

作者： J.X. Zhao(department of Mathematics, nanjing university, nanjing china) nanjing UNIV DEPT MATHNANJING 210008PEOPLES R CHINA

A new column recurrence algorithm based on the classical Greville method and modified Huang update is proposed for computing generalized inverse matrix and least squares solution. The numerical results have shown the ... 详细信息

关键词： Math A COLUMN RECURRENCE ALGORITHM FOR SOLVING LINEAR LEAST SQUARES PROBLEM ABS

A MODIFIED PROJECTION AND CONTRACTION METHOD FOR A CLASS OF LINEAR COMPLEMENTARITY PROBLEMS

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Journal of Computational Mathematics 1996年第1期14卷 54-63页

作者： B.S. He(department of Mathematics, nanjing university, nanjing, china) nanjing UNIV DEPT MATHNANJING 210008PEOPLES R CHINA

Recently, we have proposed an iterative projection and contraction (PC) method for a class of linear complementarity problems (LCP)([4]). The method was showed to be globally convergent, but no statement could be made about the rate of convergence. In this paper, we develop a modified globally linearly convergent PC method for linear complementarity problems. Both the method and the convergence proofs are very simple. The method can also be used to solve some linear variational inequalities. Several computational experiments are presented to indicate that the method is surprising good for solving some known difficult problems.

关键词： Th Pn A MODIFIED PROJECTION AND CONTRACTION METHOD FOR A CLASS OF LINEAR COMPLEMENTARITY PROBLEMS II

Occurrence of mixed-layer illite/smectite at temperature of 285℃ in an active hydrothermal system and its significance

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Chinese Science Bulletin 1997年第4期42卷 318-321页

作者： Jl Junfeng, P. R. L. Browne and LIU Yingjun1. department of earth sciences, nanjing university, nanjing 210093, china 2 Geothermal Institute and Geology department, university of Auckland, New Zealand department of earth sciences Nanjing University Nanjing China Geothermal Institute and Geology department University of Auckland New Zealand

THE progressive transformation of smectite into illite via mixed-layer illite/smectite (I/S) phases occurs during hydrothermal alteration, burial diagenesis and regional metamorphism. The proportion of illite or smectite (also indicated by their expandability) and ordering of I/S, interpreted by X-ray powder diffraction (XRD) profiles, have long been used as geothermometers in sedimentary basins. It is found that R=1 ordering mixed-layer I/S still exists

关键词： mixed-layer illite/smectite geothermometer hydrothermal system.

Proof of inseparable prime C~*-algebras A with RR(A)=0 being primitive C~*-algebras

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Chinese Science Bulletin 1999年第8期44卷 688-690页

作者： ZHANG Lunchuan and MA Jipudepartment of Mathematics , Beijing Normal university , Beijing 100875, china department of Mathematics , nanjing university, nanjing 210093, china department of Mathematics Beijing Normal University Beijing China department of Mathematics Nanjing University Nanjing China

First, that prime C~* -algebras with countable primitive ideals are all primitive C*-algebras is proved. Then the proof that prime C~* -algebras with property RR(A) = 0 are all primitive C~*-algebras is given.

关键词： prime C~*-algebras primitive C~*-algebras hereditary C~*-algebras open projection and close projection.