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高维Heisenberg群上热算子的分析

系统科学与数学 2000年第1期20卷 71-77页

作者：屈长征西北大学数学系西安710069

利用留数定理及轨道积分方法，讨论了２ｎ＋１（ｎ＞１）维Ｈｅｉｓｅｎｂｅｒｇ群上热核及Ｇｒｅｅｎ核的渐近性，并给出了更简明的渐近公式，彻底解决了Ｈｕｅｂｅｒ，Ｈ等人遗留的问题．

关键词： Heisenberg群热核 Green核渐近性热算子

Assessment of candidate plant DNA barcodes using the Rutaceae family

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Science China(Life Sciences) 2010年第6期53卷 701-708页

作者： LUO Kun1,2,CHEN ShiLin1,CHEN KeLi2,SONG JingYuan1,YAO Hui1,MA XinYe1,ZHU YingJie3,pANG XiaoHui1,YU Hua1,LI XiWen1,4 & LIU Zhen2 1Institute of Medicinal plant Development,peking Union Medical College,Chinese Academy of Medical Sciences,Beijing 100193,China 2College of pharmacy,Hubei university of Chinese Medicine,Wuhan 430061,China 3School of Bioscience and Engineering,Southwest Jiaotong university,Chengdu 610031,China 4department of Chemistry,Tsinghua university,Beijing 100084,China 1. Institute of Medicinal plant Development Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100193 China2. College of Pharmacy Hubei University of Chinese Medicine Wuhan 430061 China3. School of Bioscience and Engineering Southwest Jiaotong University Chengdu 610031 China4. Department of Chemistry Tsinghua University Beijing 100084 China

DNA barcoding is a rapidly developing frontier technology that is gaining worldwide ***,seven regions (psbA-trnH,matK,ycf5,rpoC1,rbcL,ITS2,and ITS) with potential for use as DNA barcodes were tested for their ability to identify 300 samples of 192 species from 72 genera of the family *** evaluate each barcode’s utility for species authentication,pCR amplification efficiency,genetic divergence,and barcoding gaps were *** found that the ITS2 region exhibited the highest inter-specific divergence,and that this was significantly higher than the intra-specific variation in the "DNA barcoding gap" assessment and Wilcoxon two-sample *** ITS2 locus had the highest identification efficiency among all tested *** a previous study,we found that ITS2 was able to discriminate a wide range of plant taxa,and here we confirmed that ITS2 was also able to discriminate a number of closely related ***,we propose that ITS2 is a promising candidate barcode for plant species identification.

关键词： DNA barcoding ITS2 Rutaceae identification

Effects of salvianolic acid B on proliferation, neurite outgrowth and differentiation of neural stem cells derived from the cerebral cortex of embryonic mice

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Science China(Life Sciences) 2010年第6期53卷 653-662页

作者： GUO GuoQing1,LI Bin1,WANG YuanYuan1,SHAN AiJing1,SHEN WeiZai1,YUAN Lin2 & ZHONG ShiZhen2 1department of Anatomy,Medical College of Jinan university,Guangzhou 510630,China 2Institute of Clinical Anatomy,Key Laboratory of Tissue Construction and Detection of Guangdong province,Southern Medical university,Guangzhou 510150,China 1. department of Anatomy Medical College of Jinan University Guangzhou 510630 China2. Institute of Clinical Anatomy Key Laboratory of Tissue Construction and Detection of Guangdong Province Southern Medical University Guangzhou 510150 China

Salvianolic acid B is isolated from Salvia miltiorrhiza,the root of which is widely used as a traditional Chinese medicine to treat ***,little is known about how salvianolic acid B influences growth characteristics of neural stem cells (NSCs).The purpose of the present study was to evaluate the effects of salvianolic acid B on proliferation,neurite outgrowth and differentiation of NSCs derived from the cerebral cortex of embryonic mice using MTT,flow cytometry,immunofluorescence and *** was found that 20 μg mL·1 and 40 μg mL·1 salvianolic acid B had similar effects on proliferation of NSCs,and a suitable concentration of salvianolic acid B increased the number of NSCs and their derivative *** growth-promoting activity of salvianolic acid B was dependent on and associated with an accumulation in the G2/S-phase cell *** acid B also promoted the neurite outgrowth of NSCs and their differentiation into *** mRNA for tau,GFAp and nestin were present in differentiating neurospheres induced by salvianolic acid ***,high-level expression of tau mRNA and low-level expression of GFAp mRNA was detected in differentiated cells,in contrast to the control *** collective evidence indicates that exogenous salvianolic acid B is capable of promoting proliferation of neurospheres and differentiation towards the neuronal lineage in vitro and may act in the proliferation of NSCs and may promote NSC differentiation into neuronal cells.

关键词： salvianolic acid B proliferation differentiation neurite outgrowth neural stem cells cerebral cortex embryonic mouse

L^2 ASYMpTOTIC FOR THE EQUILIBRIUM SOLUTION OF THE F-M EQUATIONS IN THE SpACE-pERIODIC CASE

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Acta Mathematica Scientia 1999年第S1期19卷 548-554页

作者：何树红屈超纯 department of mathematics Yunnan University Kunming 650091 China

The L2 exponetial asymptotical stability for the equilibrium solution of the F-M equations in the space-periodic case (n=2) is considered. Under some assumptions on the external force, it can be shown that the weak solution of F-M equations with initial and boundary conditions in space-periodic case approaches the stationary solution of the system exponetially when time t goes to infinite.

关键词： Weak solution equilibrium solution asymptotical stability

Fast Fuzzy c-Means Clustering Algorithm Based On Genetic Algorithm

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Fast Fuzzy c-Means Clustering Algorithm Based On Genetic Alg...

ON THE CONNECTIVITY OF CAYLEY COLOR GRApHS

The Second Conference on Fuzzy Information & Engineering

作者： YUNYING DONG department of mathematics & physics, Dalian Fisheries university, Dalian,Liaoning, China HONG ZHANG department of mathematics & physics, Dalian Fisheries university, Dalian, Liaoning, China

In this paper, we propose a fast fuzzy c-means clustering algorithm based on genetic algorithm. This method use a series of subset of the whole set to get initial cluster centers which are near to the ’real’ cluster centers;and then we use the improved genetic fuzzy cluster algorithm to cluster. In this way, the proposed algorithm in this paper can accelerate the time required to converge and improve the result of cluster. Experiments in this paper can prove that our algorithm is better than the algorithms (Yunying Dong (2004),Yunying Dong (2005)).

关键词： genetic algorithm FCM fast cluster fuzzy cluster

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Systems Science and Mathematical Sciences 1993年第3期6卷 227-230页

作者： HUANG Qiongxiang LIU Xin department of mathematics, Xinjiang Univerasity,Urumchi 830046, China 新疆大学新疆乌鲁木齐

In this paper we obtain the necessary and sufficient condition for the connec-tivity of the Cayley color graphs or the Cayley graphs to be equal to their minimum *** sharp lower bounds of connectivity of Cayley color ... 详细信息

关键词： Connectivity atom Cayley color graphs

METALLOGENIC CHARACTERISTICS AND OREpROSpECTINGFUTURE OF pRECAMBRIAN GOLD DEpOSITSIN MUFUJIULING DISTRICT

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Journal of Central South university 1996年第1期8卷 11-13页

作者： Wu Yanzhi(department of Geology, Central South university of Technology,Changsha 410083, China) department of Geology Central South University of Technology Changsha 410083 China

MufuJiuling district is an important placer gold producing land since the ancient time. In recent years, some primary gold deposits and mineralizations, e. g., Huangjindong and Tulongshan gold deposits, have been found. But the metallogenic conditions and regularities as well as the oreprospecting future remain to be recognized. Through the study on the metallogenic background and condition, the auriferous source bed and the mineralizing characteristics, three types of primary gold deposits are confirmed to be prospective in this district and some key problems about their prospecting and evaluating are put forward.

关键词： primary gold deposit preCambrian age metallogenic marker

Constructing Intranet for the Security of E-government

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Constructing Intranet for the Security of E-government

Mechanism of liquid zinc corrosion on metals

The Second Conference on Fuzzy Information & Engineering

作者： JIAJUN LAI department of Applied mathematics, Southwest Jiaotong university, Chengdu 610031, China YANG XU department of Applied mathematics, Southwest Jiaotong university, Chengdu 610031, China

Nowadays, the security of E-govemment has been the principal problem in many countries. Furthermore the security of Intranet has become more and more important. In this a new scheme is brought forward, that is,a new strong way of authentication combined with the service of authorization has been put forward into the pKI (public Key Infrastructures) system. It overcomes the shortcomings of single pKI system completely and ensures the security of Intranet well.

关键词： time token intranet pMI

来源： cnki会议评论

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International Journal of Minerals,Metallurgy and Materials 1997年第3期11卷 22-26页

作者： CAO Xiaoming , LONG Yi WANG Run2 (department of Materials and Science, Hebei university of Technology, Tianin 300130, China) (Materials Science and Engineering School, university of Science and Technology Beijing, Beijing 100083, China)

Two kinds of materials, soluble and insoluble in liquid zinc, such as Fe and FeB, are separately dealt with.A new theory is presented for insoluble materials. Based on the theory, the surface defects of insoluble mate... 详细信息

关键词： liquid zinc corrosion mechanism boronize