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Geotectonica et Metallogenia 2001年第1期25卷 65-66页

作者： CHEN Guo neng (department of earth {2.,{3., guangzhou 510275, China) department of earth {2. Zhongshan UniversityGuangzhou 510275China

Unlike the magma intrusion model,the in- situ melting hypothesis advanced in the lastdecade regards the upper crustas a closed system,and granite as the resultof the materialswithin system changing from order (protolith) to disorder (melts) and to new order(granite) with the variations of entropy of the *** various geological and geochemi-cal data from the Mesozoic granitesof southeast China are explained logically and systemical-ly by the hypothesis,concluding that they should be originated from the melting of *** to the hypothesis,melts generated from in- situ melting are of layer- likewithin the crustand batholithsare the protruding parts of the uppersurface of the layer (de-fined as the Melting Interface,MI for short) .On the basis the author tries to discuss thesource of heatfor the Mesozoic crustal melting in southeast China.

关键词： FORMATION OF THE CRUSTAL MELTING LAYER AND ITS RELATIONS TO THE DEFORMATION OF CONTINENTAL CRUST ITS

An adaptive spatial clustering method for automatic brain MR image segmentation

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Progress in Natural Science:Materials International 2009年第10期19卷 1373-1382页

作者： Jingdan Zhang,Daoqing Dai Center for Computer Vision and department of Mathematics,Sun Yat-Sen(zhongshan) {2.,{3. 510275,China [a]Center for Computer Vision and department of Mathematics Sun Yat-Sen (Zhongshan) University Guangzhou 510275 China

In this paper,an adaptive spatial clustering method is presented for automatic brain MR image segmentation,which is based on a competitive learning algorithm-self-organizing map(SOM).We use a pattern recognition approach in terms of feature generation and classifier ***,a multi-dimensional feature vector is constructed using local spatial ***,an adaptive spatial growing hierarchical SOM(ASGHSOM) is proposed as the classifier,which is an extension of SOM,fusing multi-scale segmentation with the competitive learning clustering algorithm to overcome the problem of overlapping grey-scale intensities on boundary ***,an adaptive spatial distance is integrated with ASGHSOM,in which local spatial information is considered in the clustering process to reduce the noise effiect and the classification *** proposed method is validated by extensive experiments using both simulated and real MR data with varying noise level,and is compared with the state-of-the-art algorithms.

关键词： Self-organizing map Growing hierarchical SOM Adaptive spatial distance Image segmentation MR images

Periodic Number for Anosov Maps

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Acta Mathematica Sinica,English Series 1997年第2期13卷 169-174页

作者： Sun Wenxiang (department of Computer Science,zhongshan {2.,{3. 510275,China) department of Computer Science Zhongshan University

Let X be a compact metric space and let f:X→X be an Anosov map,i.e.,an expansive selfmap with the pseudoorbit tracing property(***)(see Lemma 1).If Nn(f) denotes the number of fixed points of f^n which we name here the n-periodic number then we prove in the case as n tends to infinity that n^M ≤N_n(f)≤H^n,where M and H are two positive integers.

关键词： Specification property POTP Anosov map

THE CHARACTERISTIC OF MARINE ENVIRONMENT IN LINGDINGYANG ESTUARY

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Chinese Geographical Science 2001年第2期11卷 155-162页

作者： CHEN Bing-lu1, ZHANG Yun-ni2. CHEN Xin-geng1, WANG Zhi-gang1, YANG Guang-xing1 (1.Institute of Environmental Science, zhongshan university, guangzhou 510275, P. R. China 2. {2. of Environmental Science, zhongshan university, guangzhou 510275 Institute of Environmental Science Zhongshan University Guangzhou P. R. China department of Environmental Science Zhongshan University Guangzhou P. R. China

Hydrologic features, load of main pollutants and current condition of water quality in Lingdingyang Estuary are discussed by references and monitoring data. Affected by topography, runoff and tide, its dynamic condition is very complicated. Different water areas have different hydrologic features. The topography under the water of Lingdingyang Estuary is higher in the northwest than that in the southeast. The shoal alternates with the deep trough within the bay .The distribution of the salinity and the contents of the mud and the main pollutants tally with the topography tendency. Change in water quality goes through four stages. Current condition of water quality is fairly good. Inorganic nitrogen is the primary pollutant, and then phosphorus. Rich in nutrition of nitrogen and phosphorus become a more and more prominent problem.

关键词： Lingdingyang Estuary hydrologic features load of pollutant water quantity

Global Approximately Controllability and Finite Dimensional Exact Controllability of Semilinear Heat Equation in R^N

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Acta Mathematicae Applicatae Sinica 2003年第3期19卷 459-466页

作者： Bo Sun, Yi Zhaodepartment of Mathematics, zhongshan university,{2., China department of Mathematics Zhongshan University Guangzhou 510275 China

We prove the approxomate controllability and finite dimensional exact controllability of semilinear heat equation in R N with the same control by introducing the weighted Soblev spaces.

关键词： Semilinear heat equation controllability

Research on the dynamics of the South China Sea opening:Evidence from analogue modeling

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Science China earth sciences 2006年第10期49卷 1053-1069页

作者： SUN Zhen1,2. ZHOU Di1, ZHONG Zhihong3. XIA Bin2. QIU Xuelin1, ZENG Zuoxun4 & JIANG Jianqun5 1. CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of sciences, {3. 5103.1, China 2. CAS Key Laboratory of Marginal Sea Geology, {3. Institute of Geochemistry, Chinese Academy of sciences, {3. 510640, China 3. department of Technology, Shenzhen Branch of CNOOC, {3. 5102.0, China 4. Faculty of earth sciences, China {13. of Geosciences, Wuhan 43.074, China 5. Hainan Oil & Gas Exploration Company, Liaohe Oilfield PetroChina, Panjin 12.010, China 1. CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. CAS Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China 3. department of Technology Shenzhen Branch of CNOOC Guangzhou 510240 China 4. Faculty of earth sciences China University of Geosciences Wuhan 430074 China 5. Hainan Oil & Gas Exploration Company Liaohe Oilfield PetroChina Panjin 124010 China

Independent of Indochina extrusion, the South China Sea experienced a process from passive continental rifting to marginal sea drifting. According to the fault patterns in the Beibu Gulf basin and the Pearl River Mouth basin, the continental rifting and early spreading stage from 3.0}to 2. Ma were controlled by extensional stress field, which shifted clockwise from southeastward to south southeastward. From 2. Ma on, the sea spread in NW-SE direction and ceased spreading at around 15.5 Ma. Integrated geological information with the assumption that the South China Sea developed along a pre-Cenozoic weakness zone, we did analogue experiments on the South China Sea evolu- tion. Experiments revealed that the pre-existing weakness zone goes roughly along the uplift zone between the present Zhu-1 and Zhu-2.depression. The pre-existing weakness zone is composed of three segments trending NNE, roughly EW and NEE, respectively. The early opening of the South China Sea is accompanied with roughly 15° clockwise rotation, while the SE sub-sea basin opened with SE extension. Tinjar fault was the western boundary of the Nansha block (Dangerous Ground), while Lupar fault was the eastern boundary of the Indochina, NW-trending rift belt known as Zengmu basin developed between above two faults due to block divergent of Indochina from Nansha. In the experiment, transtensional flower structures along NW-trending faults are seen, and slight inversion occurs along some NE-dipping faults. The existence of rigid massifs changed the orientations of some faults and rift belt, and also led to deformation concentrate around the massifs. The rifting and drifting of the South China Sea might be caused by slab pull from the proto South China Sea subducting toward Borneo and/or mantle flow caused by India-Asia collision.

关键词： South China Sea, rifting and drifting, clockwise rotation, analogue modeling, rigid massifs.

Two new diterpenoids from the marine Soft coral Clavularia viridis

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Chinese Journal of Chemistry 1992年第2期10卷 155-160页

作者： SU,Jing-Yu ZHONG,Yong-Li ZENG,Long-Mei department of Chemistry,zhongshan {2.,{3. 510275 department of Chemistry Zhongshan University Guangzhou 510275

Two new dolabellane diterpenoids named clavudiol B(2.and clavirolide F(5),have been iso- lated from the soft coral Clavularia viridis,collected from Xisha Islands in the South China *** structures have been determined... 详细信息

关键词： Two new diterpenoids from the marine Soft coral Clavularia viridis ppm

Intramolecular aromatic-ring stacking interaction of ternary Zn(UTP)L^(2.) complexes

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Chinese Science Bulletin 1997年第14期42卷 1172-1175页

作者： LE Xueyi, WU Fuhai, SONG Fenyun and Jl Liangnian1.department of Chemistry, zhongshan university,{2., China State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of {3., Lanzhou 73.000, China 2. department of Hygienics, Guangdong Pharmaceutical School, guangzhou 5102.4, China department of Chemistry Zhongshan University Guangzhou 510275 China

THE mechanism of the action of the classic platinum antitumor drugs can be interpreted accord-ing to their bidentate, bifunctional interaction with the DNA of the tumor cell, resulting in in-hibition of the DNA replication. Recently, it was found that a new class of compounds withthe general formula cis-[Pt（NH3./sub>）2./sub>（N-het）Cl]Cl（N-het is a heteroaromatic N-base like pyri-dine） show effective antitumor activities. However, two possible mechanisms of action

关键词： stacking interaction ternary complexes heteroaromatic N-bases UTP4- stability constants.

Synthesis and Crystal Structure of trans(N)-(1,10-Phenanthroline)-bis (DL-Al aninato)-Cobalt( Ⅲ ) Chloridetrihydrate

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Chemical Research in Chinese Universities 1993年第3期9卷 220-224页

作者： YE Bao-hui, ZENG Tian-xian, HAN Ping and JI Liang-nian (department of Chemistry, zhongshan university, {2., {3.)

The title compound was synthesized by the reaction of cis-[Co(phen)2.l2.Cl·3.2. with DL-alanine at pH = 8, and isolated using a column chromatographic method. Its crystal structure was determined. The crystal structure belongs to mono-clinic system, space group P2./c, with a = 0. 9549(6) nm, b=2.3.46(8) nm, c= 1.0782.4) nm, β=114.13.3.°? Z = 4, Dc= 1. 50 g/cm3. The final refinement converged to R = 0. 047 for 3.0}6 independent observed reflections. In the octahedral coordination sphere formed by the cobalt atom and the coordinate atoms, N, O of DL-alan-inato ligands are in the configuration of trans-N ,N form.

关键词： Phenanthroline Alanine Cobalt( Ⅲ ) complex Crystal structure

PERTURBATIONS OF A KIND OF DEGENERATE QUADRATIC HAMILTONIAN SYSTEM WITH SADDLE-LOOP

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Chinese Annals of Mathematics,Series B 2002年第1期23卷 85-94页

作者： ZHAO YULIN,WU XIAOMING,ZHU SIMING department of Mathematics. zhongshan university,{2.. China. E-mail: mcszyl@*** department of Mathematics Zhongshan University Guangzhou 510275 China

The authors investigate a kind of degenerate quadratic Hamiltonian systems with saddle-loop. Under quadratic perturbations, it is proved that the perturbed system has at most two limit cycles in the finite plane. The ... 详细信息

关键词： Limit cycles Quadratic systems Abelian integrals