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Chinese Science Bulletin 1999年第S2期44卷 230-232页

作者： WANG Zuwei~1, ZHANG Haihua~2, YAO Dongliang~2 and ZHOU Yongzhang~3.1. department of Geography, Tianjin Normal university, Tianjin 3.0071, china 2. {3. Institute of Geochemistry, Chinese Academy of sciences, {3. 510640, china 3. department of earth sciences, zhongshan university, guangzhou 510275, china eeszhou@*** department of Geography Tianjin Normal University Tianjin 300071 China guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China department of earth sciences Zhongshan University Guangzhou 510275 China

THE altered deformation zone type Au (Ag) deposits share an important part from the precious metallicore deposits in the Yunkai area, South china. Their formation is a history of poly-stage evolution. Pre- liminary source strata, Calidoniam metamorphism, Indosinian-Yanshanian ductile shear deformation andassociated hydrotheraml alteration all play certain roles in the history. This note discusses the geochemical conditional of the hydrothermal fluids during mineralization. Two representative ore deposits, the Pangxidong Ag(Au) deposit and Hetai Au deposits are selectedfor this study. They are hosted in altered ductile shear zones. Wall-rock hydrothermal alteration is bothspatially and temporally associated with the development of the ductile shear system. Silicification occurred throughout the whole alteration process. There are three groups of quartz: thepredeformational quartz, the early stage hydrothermal quartz, and the late stage hydrothermal quartz asso-

关键词： precious metallic deposit fluid inclusions mineralizing fluid South china.

Geochemical behavior of elements at fossil sea floor water/sediment interface

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Chinese Science Bulletin 1999年第S2期44卷 232-233页

作者： ZHANG Haihua~1, XIA Yu~1, WANG Zuwei~2 and ZHOU Yongzhang~3.1. guangzhou Institute of Geochemistry, Chinese Academy of Science, guangzhou 510640, china 2. {3. of Geography, Tianjin Normal university, Tianjin 3.0071, china 3. department of earth sciences, zhongshan university, guangzhou 510275, china guangzhou Institute of Geochemistry Chinese Academy of Science Guangzhou 510640 China department of Geography Tianjin Normal University Tianjin 300071 China department of earth sciences Zhongshan University Guangzhou 510275 China

THIS note deals with the geochemical behavior of elements near the water/sediment interface of a fossil seafloor. The Nandan-Hechi basin, located in northwest Guangxi, Southern china, is selected for exemplified study. It is an elongated basin, and developed on a Caledonian basement. Its Devonian strata hosthydrtothermally sedimentary formations, and are typical of the intra-platformal basin facies sediments oversouthern china. A steady sedimentary sequence may be observed, commonly going from carboniferouspelite at bottom, upward through bedded chert, thickly banded argillaceous limestone, thinly bandedsiliceous limestone and small lensiod argillaceous limestone in the middle, to coarse lensoid siliceousand/or argillaceous limestone at the top. The chert and some argillaceous limestone are related to hydrothermally sedimentary origin. The present study focuses on the lensoid argillaceous limestone formation. This formation contains the following characteristic sedimentary structures: small lensoid structure,vermiform structure, wave-shaped banded structure, massive structure, white framboid structure, andcage netting structure.

关键词： water/sediment interface sedimentation periodicity sedimentary geochemistry basin.

ON THE MODULI NUMBER OF PLANE CURVE SINGULARITIES WITHONE CHARACTERISTIC PAIR

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Chinese Annals of Mathematics,Series B 1999年第4期20卷 407-412页

作者： CHEN HAO(department of Mathematics, zhongshan university, guangzhou 510275,{3.) zhongshan Univ Dept Math Guangzhou 510275 Peoples R China

The author gives another linear-algebraic proof of the famous result of Zariski, Delorme,Briancon- Granger- Maisonobe about the moduli number of plane curve singularities with the same topological type as Xa + Yb = 0 (i.e.,with one characteristic pair). Since the original proof depends very much on the division theorem of Briancon, it cannot be generalized to higher dimensions. It is hopeful that the proof here will be applied to the higher dimensional cases.

关键词： Moduli number Plane curve Singularity Characteristic pair

ID-WAVELETS METHOD FOR HAMMERSTEIN INTEGRAL EQUATIONS

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Journal of Computational Mathematics 1998年第6期16卷 499-508页

作者： Xian-biao Wang Wei Lin (department of Mathematics, zhongshan university, guangzhou 510275,{3.) zhongshan Univ Dept Math Canton 510275 Peoples R China

The numerical solutions to the nonlinear integral equations of Hammerstein-type y(t) = f(t) + integral(0)(1)k(t, s)g(s, y(s))ds, t is an element of [0,1] are investigated. A degenerate kernel scheme basing on ID-wavelets combined with a new collocation-type method is presented. The Daubechies interval wavelets and their main properties are briefly mentioned. The rate of approximation solution converging to the exact solution is given. Finally we also give two numerical examples.

关键词： nonlinear integral equation interval wavelets degenerate kernel

PREPARATION　OF　NANOCOMPOSITE　BINARY　GADOLINIUM　ALLOYS　AND　THEIR　ENHANCED　MAGNETIC　ENTROPY　CHANGE

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中国有色金属学会会刊：英文版 1996年第3期6卷 86-91页

作者： Zhang Jieli Shao Yuanzhi(department ofphysics, zhongshan university, guangzhou 510275) zhongshan UNIV DEPT PHYSGUANGZHOU 510275PEOPLES R CHINA

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ＰＲＥＰＡＲＡＴＩＯＮＯＦＮＡＮＯＣＯＭＰＯＳＩＴＥＢＩＮＡＲＹＧＡＤＯＬＩＮＩＵＭＡＬＬＯＹＳＡＮＤＴＨＥＩＲＥＮＨＡＮＣＥＤＭＡＧＮＥＴＩＣＥＮＴＲＯＰＹＣＨＡＮＧＥ￥ＺｈａｎｇＪｉｅｌｉ；ＳｈａｏＹｕａｎｚｈｉ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓ...

关键词： nanocomposites magnetic refrigeration rare earth

The Influence of Minimal Subgroups on the Structure of Finite Groups

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Acta Mathematica Sinica,English Series 2000年第1期16卷 63-70页

作者： Yanming Wang Mathematics department,zhongshan university,{3. 510275,P.R.china Mathematics department Zhongshan University Guangzhou 510275 P.R. China

Let G be a finite *** question how the properties of its minimal subgroups influence the structure of G is of considerable interest for some *** this paper we try to use c-normal condition on minimal subgroups to char... 详细信息

关键词： c-normal subgroup Supersolvable Nilpotent Generalized Fitting subgroup

The Isotone Mappings on Ockham Algebras

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Acta Mathematica Sinica,English Series 1996年第1期12卷 43-48页

作者： Fang Jie department of Mathematics zhongshan university guangzhou, {3. china 中山大学数学系广东广州

In this paper we shall describe some algebraic concepts of Ockham algebras. We show that, if L, M∈K1,1 then H（S（L）,S（M））≌S（H（L,M））.

关键词： Isotone (Ockham) Isomorphism

A Generalization of Hall-Higman's Reduction Theorem

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Acta Mathematica Sinica,English Series 1995年第1期11卷 74-80页

作者： Wang Yanming department of Mathematics zhongshan university guangzhou,{3. china harm.showa-u.ac.jp

In this paper,we generalize the Hall-Higman’s reduction theorem by dropping the restrictive hypothesis(丨G丨,丨H丨)=1 and determine the detailed structure of G.

关键词： Hall A Generalization of Hall-Higman’s Reduction Theorem

On a problem of Skiba from the Kourovka Notebook

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Science china Mathematics 2004年第1期47卷 96-103页

作者： WANG Yanming & WEI HuaquanLingnan College and School of Mathematics, zhongshan university, guangzhou 510275, china School of Mathematics, zhongshan university, guangzhou 510275, china department of Mathematics, Guangxi Teacher’s College, Nanning 53.001, china 1. Lingnan College and School of Mathematics Zhongshan University 510275 Guangzhou China 2. School of Mathematics Zhongshan University 510275 Guangzhou China 3. department of Mathematics Guangxi Teacher’s College 530001 Nanning China

In this paper, we give a positive answer to a recent open problem of Skiba in Kourovka Notebook without using the odd order theorem and other deep theorems. Some of the techniques are improved.

关键词： supersolvable group c-supple merited subgroup complemented subgroup generalized fitting subgroup saturated formation

Roles of urban vegetation on balance of carbon and oxygen in guangzhou, china

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Journal of Environmental sciences 2003年第2期15卷 155-159页

作者： GUAN Dong-sheng, CHEN Yu-juan (department of Environmental Science, zhongshan university, guangzhou 510275,{3.. department of Environmental Science Zhongshan University Guangzhou 510275 China

The plant biomass and net primary production(NPP) of urban vegetation in guangzhou were estimated by dimension analysis, tree truck volume, and harvest methods as well as relationship between biomass and NPP and so on. The biomass and NPP were respectively 2875150t and 1058122 t/a. They were respectively 3.2495t and 64948 t/a in the built-up area and 2482655t and 993.47 t/a in the unbuilt-up area. It would make plant biomass, especially NPP decline obviously, if the unbuilt-up area were changed to the built-up area. The carbon content of plant was 13.8649 for the total and 13.78 t/hm 2 for the mean, and amounts of carbon fixed and oxygen made by urban vegetation were respectively 4.80 t/(hm 2·a) and 12.79 t/(hm 2·a) for the mean and 462624 t/a and 123.43. t/a for the total, which were equal to 1.45 times and 1.04 times of those by human breathing. However, they were only equal to 7.61% and 4.97% of amount of carbon released and oxygen consumption in urban guangzhou. The biomass and NPP of urban vegetation in guangzhou only corresponded to 7.8% and 47.3. of those of southern subtropical evergreen broad-leaf forest in Dinghu Mountain. Therefore, the roles of guangzhou urban vegetation in balance of carbon and oxygen would be increased greatly if it could be conserved and improved in some way.

关键词： urban vegetation carbon oxygen balance guangzhou