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SPONTANEOUS POLARIZATION AND THE DISTRIBUTION OF INTERNAL STRESS AND ELECTRIC FIELDS AROUND A TRIPLE POINT

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Acta Mechanica Solida Sinica 2000年第1期13卷 1-8页

作者： Zhang Ying (department of Materials Science,xiamen {2.,xiamen 361005,china) xiamen Univ Dept Mat Sci Xiamen 361005 Peoples R China

In this article, distributions of internal stress and internal electric fields around a triple point of ferroelectric polycrystals generated by the spontaneous deformation and spontaneous polarization were investigated. It was found that when all three grains consist of a single domain, the internal stresses and the internal electric fields do not vanish. Though it may be determined according to the principle of energy, the spontaneous configuration will not be unique without involving other conditions due to the symmetry of the crystal structure.

关键词： spontaneous polarization internal stress internal electric field electric domain

On the Number of Fair Triangulations

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Acta Mathematica Sinica,English Series 2000年第1期16卷 79-84页

作者： Han Ren department of mathematics,{2. university,{2. 361005,P.R.chinaYanpei Liu department of mathematics,Northern JiaoTong university,Beijin 100044,P.R.china department of mathematics Xiamen University Xiamen 361005 P.R. China department of mathematics Northern JiaoTong University Beijin 100044 P.R. China

In this paper a special kind of triangulated maps on the sphere called fair triangulations is enumerated with the size of maps as ***,the number of several other kinds of triangulations are enumerated as well.

关键词： Map Triangulation Enumeration Lagrangian inversion

Secondary pollution from sediment and red tide occurrence

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Journal of Environmental Sciences 1995年第1期7卷 115-120页

作者： Chen Cimei Li Yueling Wu Yuduan department of Ocaeanography,xiamen {2., xiamen 361005,china Dept of Oceanography Xiamen Univ Xiamen China China

ＳｅｃｏｎｄａｒｙｐｏｌｌｕｔｉｏｎｆｒｏｍｓｅｄｉｍｅｎｔａｎｄｒｅｄｔｉｄｅｏｃｃｕｒｒｅｎｃｅＣｈｅｎＣｉｍｅｉ；ＬｉＹｕｅｌｉｎｇ；ＷｕＹｕｄｕａｎＤｅｐａｒｔｍｅｎｔｏｆＯｃａｅａｎｏｇｒａｐｈｙ，Ｘｉａｍ... 详细信息

ＳｅｃｏｎｄａｒｙｐｏｌｌｕｔｉｏｎｆｒｏｍｓｅｄｉｍｅｎｔａｎｄｒｅｄｔｉｄｅｏｃｃｕｒｒｅｎｃｅＣｈｅｎＣｉｍｅｉ；ＬｉＹｕｅｌｉｎｇ；ＷｕＹｕｄｕａｎＤｅｐａｒｔｍｅｎｔｏｆＯｃａｅａｎｏｇｒａｐｈｙ，ＸｉａｍｅｎＵｎｉｖｅｒｓｉｔｙ，ｘｉａｍ...

关键词： sediment secondary pollution red tide.

Disequilibria between ^(2.0)Po and ^(2.0)Pb in surface waters of the southern South china Sea and their implications

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Science china Earth Sciences 2006年第1期49卷 103-112页

作者： YANG Weifeng, HUANG Yipu1,2. CHEN Min1,2. ZHANG Lei, LI Hongbin, LIU Guangshan1,2.& QIU Yusheng1,2.1. department of Oceanography, xiamen university,{2., china 2. State Key Laboratory of Marine Environmental Science, xiamen university,{2., china 1. department of Oceanography Xiamen University Xiamen 361005 China 2. State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Activities of the naturally occurring radionuclides, ^(2.0)Pb and ^(2.0)Po,were measured in both dissolved ( 0.45 μm) phases from surfacewaters of the southern South china Sea. The average activity of particulate ^(2.0)Pb, 0.2. Bq/m^3 (n= 2.), accounted for about 12. of the total ^(2.0)Pb, which corresponds with values of open *** ^(2.0)Po, with an average activity of 0.43 Bq/m^3, accounted for about 40% of the total^(2.0)Po, which was much higher than those of open and eutrophic oceans. The residence times oftotal ^(2.0)Po and ^(2.0)Pb in surface waters estimated from an irreversible steady-state model were0.82.a and 1.16 a, respectively. The consistently high fractionation factor calculated either byscavenging rate constants (5.42. or K_d values (6.69) suggested that a significant fractionationoccurred between ^(2.0)Po and ^(2.0)Pb during their removal from solution to particles and that thetwo radionuclides had different biogeochemical cycling pathways in the oligotrophic South china ***, our results indicated that there exist different fractionation mechanisms between^(2.0)Po and ^(2.0)Pb in different marine environments: in eutrophic ocean, plankton detritus andfecal pellets are the main carrier of ^(2.0)Po and ^(2.0)Pb, by which ^(2.0)Po and ^(2.0)Pb havebeen scavenged and removed; while in oligotrophic ocean, microbes could become the main carrier of^(2.0)Po and fractionate ^(2.0)Po and ^(2.0)Pb significantly as a result of scarce plankton detritusand fecal pellets. These results suggest the use of ^(2.0)Po to trace marine biogeochemicalprocesses relating to microbial activities and the cycling of sulfur group elements (S, Se, Te andPo).

关键词： South china Sea, 2.0Po, 2.0Pb, disequilibria, scavenging.

REMOVABLE EARS OF 1-EXTENDABLE GRAPHS

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Journal of Systems Science & Complexity 2010年第2期23卷 372-378页

作者： Shaohui ZHAI Xiaofeng GUO department of mathematics and Physics Xiamen University of Technology Xiamen 361024 China. School of Mathematical Sciences Xiamen University Xiamen 361005 China.

Carvalho, Lucchesi and Murty proved that any 1-extendable graph G different from K2.and C2. has at least A（G） edge-disjoint removable ears, and any brick G distinct from K4 and C6 has at least A（G） - 2.removable edges, where A（G） denotes the maximum degree of G. In this paper, we improve the lower bounds for numbers of removable ears and removable edges of 1-extendable graphs. It is proved that any 1-extendable graph G different from K2.and C2. has at least x′（G） edge-disjoint removable ears, and any brick G distinct from Ka and Ce has at least x′（G） - 2.removable edges, where x′（G） denotes the edge-chromatic number of G. Key words 1-extendable graphs, removable ear, removable edge.

关键词： 1-extendable graphs removable ear removable edge.

Rotation-invariant Target Detection Using a Hybrid Optical Circular Harmonic Joint Transform Correlator with DC Bias

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Chinese Journal of Lasers 1999年第1期8卷 50-55页

作者： HUANG Xiaojing (department of Basic Science, Fisheries College, Jimei university, {2. 36102., china)HUANG Xianlie (department of Physics, xiamen university, xiamen 361005, china) 集美大学渔业学院福建厦门 361021 厦门大学物理系福建厦门

１ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｒｏｔａｔｉｏｎｉｎｖａｒｉａｎｔｐａｔｅｒｎｒｅｃｏｇｎｉｔｉｏｎ，ｔｈｅｓｐａｔｉａｌｍａｔｃｈｅｄｃｏｒｅｌａｔｏｒｉｓｏｆｔｅｎｕｓｅｄｂｙｔａｋｉｎｇａｃｉｒｃｕｌａｒｈａｒ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｒｏｔａｔｉｏｎｉｎｖａｒｉａｎｔｐａｔｅｒｎｒｅｃｏｇｎｉｔｉｏｎ，ｔｈｅｓｐａｔｉａｌｍａｔｃｈｅｄｃｏｒｅｌａｔｏｒｉｓｏｆｔｅｎｕｓｅｄｂｙｔａｋｉｎｇａｃｉｒｃｕｌａｒｈａｒｍｏｎｉｃｃｏｍｐｏｎｅｎｔ（ＣＨ...

关键词： optical pattern recognition circular harmonic function joint transform correlator

_b-EQUATION ON COMPLEX MANIFOLDS

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Acta Mathematica Scientia 1997年第3期17卷 262-268页

作者：钟同德 Institute of mathematics Xiamen University Xiamen 361005 China

By using Koppelman-Leray kernel and under suitable condition the integral representation formula of equation on complex manifolds is obtained.

关键词： complex manifolds Strictly pseudoconvex domain ■-equation

INFLUENCE OF MOLECULAR WEIGHT OF CHITIN AND ITS THREE DERIVATIVES ON CRITICAL CONCENTRATION OF LYOTROPIC LIQUID CRYSTALLINE PHASE TRANSITION

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Chinese Journal of Polymer Science 2000年第1期18卷 15-17页

作者： Yan-ming Dong Jian-wei Wang Qing Yuan department of Materials Science, xiamen university,{2., china xiamen Univ Dept Mat Sci Xiamen 361005 Peoples R China

The critical concentration of lyotropic liquid crystalline phase transition for chitin derivatives was determined using a polarization microscope. The influence of molecular weight on critical concentration of liquid crystalline solution for chitin, chitosan, cyanoethyl chitosan and propionyl chitin successively increases as the chain rigidity decreases. Therefore it can be used as an indicator of the chain rigidity.

关键词： chitin chitosan lyotropic liquid crystalline polymer critical concentration molecular weight

Multi-channel analyzer controlled by applet and flash

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Nuclear Science and Techniques 2002年第4期13卷 202-204页

作者： HUANG Wen-Da(department of Physics, xiamen university,{2.) department of Physics Xiamen University 福建 Xiamen 361005

Both java applet and flash were applied to emulate virtual panel of multi-channel pulse height analyzer (MCA), and Microsoft IE browser was used to control MCA through internet to measure the γ-ray energy spectrum of 137Cs. It Was shown that most of the work completed by applet can be done by flash too, and with flash, more beautiful panel of the remote controlled instruments can be easily designed.

关键词：多道脉冲分析器闪光控制实验