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The Einstein-Khler Metric on the Third Cartan-Hartogs Domain

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Acta Mathematica Sinica,English Series 2008年第10期24卷 1703-1712页

作者： Wen Juan ZHANG wei ping yin Department of Mathematics Beijing Institute of Technology Beijing 100081 P. R. China Department of Mathematics Capital Normal University Beijing 100037 P. R. China

In this paper we discuss the Einstein-Kahler metric on the third Cartan-Hartogs domain Y111（n, q; K）. Firstly we get the complete Einstein Kahler metric with explicit form on Y111（n, q; K） in the case of K=q/2 ＋ 1/q-1. Secondly we obtain the holomorphic sectional curvature under this metric and get the sharp estimate for this holomorphic curvature. Finally we prove that the complete Einstein-Kahler metric is equivalent to the Bergman metric on Y111（n, q; K） in case of K=q/2＋1/q-1.

关键词： Einstein Kahler metric holomorphic sectional curvature holomorphic automorphism group

The equivalence on classical metrics

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Science China Mathematics 2007年第2期50卷 183-200页

作者： wei-ping yin An WANG School of Mathematical Sciences Capital Normal UniversityBeijing 100037China

In this paper we study the complete invariant metrics on Cartan-Hartogs domains which are the special types of Hua domains. Firstly, we introduce a class of new complete invariant metrics on these domains, and prove that these metrics are equivalent to the Bergman metric. Secondly, the Ricci curvatures under these new metrics are bounded from above and below by the negative constants. Thirdly, we estimate the holomorphic sectional curvatures of the new metrics, and prove that the holomorphic sectional curvatures are bounded from above and below by the negative constants. Finally, by using these new metrics and Yau’s Schwarz lemma we prove that the new metrics are equivalent to the Einstein-K?hler metric. That means that the Yau’s conjecture is true on Cartan-Hartogs domains.

关键词： Bergman metric Einstein-Kahler metric Cartan-Hartogs domain equivalence on classical metrics

A New Flavone Glycoside from Epimedium koreanum

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Chinese Chemical Letters 2006年第10期17卷 1328-1330页

作者： Hai Yan ZHANG Tian Zeng ZHAO wei ping yin Ming Jian WU Chemistry Department Zhengzhou University Zhengzhou 450052 Key Laboratory of Natural Products Henan Academy of Science Zhengzhou 450002 Chemical Engineering ＆ Pharmaceutics College Henan University of Science and Technology Luoyang 471003

A novel flavone glycoside named 3＇＇＇-carbonyl-2＇＇-β-L-quinovosyl icariside Ⅱ was isolated from the aerial parts of Epimedium koreanum. Its chemical structure was elucidated on the basis of spectral analysis.

关键词： Epimedium koreanum aerial parts flavone glycoside 3'''-carbonyl-2'''-β-L-quinovosylicariside II.

Two novel nortriterpenes from the roots of Phlomis umbrosa

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Chinese Chemical Letters 2008年第10期19卷 1228-1230页

作者： Pu Liu Li ying Li Rui Qi Niu wei ping yin Tian Zeng Zhao Chemical Engineering ＆ pharmaceutical College Henan University of Science and Technology Luoyang 471003 China Key Laboratory of Natural Products Henan Academy of Sciences Zhengzhou 450052 China

Two novel 28-noroleanane-derived spirocyclic triterpenoids with unusual skeleton structures, phlomisone （1）, phlomistetraol A （2）, were isolated from the roots of Phlomis umbrosa. Their structures were elucidated by spectroscopic methods, including 1D, 2D nuclear magnetic resonance （NMR）, high-resolution mass spectrometry （HR-MS）.

关键词： Phlomis umbrosa Nortriterpenes

A Novel Sesquiterpene Polyol Ester from Celastrus Angulatus and its Antitumor Activities

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Chinese Chemical Letters 1999年第6期10卷 487-490页

作者： wei ping yin Tian Zeng ZHAO Ling Jie GAO Da Peng ZOU Jian Xun KANG(Institute of Chemistry,Henan Academy of Sciences Zhengzhou 450003 Centre of Instrumental Analysis. Zhengzhou University. Zhengzhou 450052) Institute of Chemistry Henan Academy of Sciences Zhengzhou 450003 China Centre of Instrumental Analysis Zhengzhou University Zhengzhou 450052 China

A new sesquiterpene polyol ester was isolated from the leaves of Celastrus angulatus. Its structure was determined as 1 (beta), 2 (beta), 9 (a) -triacetoxy-8 (a) -((a) -hydroxyl-isobutyryloxy)-15-benzoyloxy-4 (a) -hydroxy-dihydroagarofuran by means of NMR, MS and IR spectral analysis. Preliminary biological study on antitumor activity revealed that this compound showed strong nonselective cytotoxicity against four of the NCI panel cell lines.

关键词： Celastrus angulatus sesquiterpene polyol ester NMR antitumor activities

k＜1时Cartan-Hartogs域上的极值问题

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数学学报（中文版） 2007年第4期50卷 881-886页

作者：苏简兵殷慰萍徐州师范大学数学科学学院徐州221116 首都师范大学数学科学学院北京100037

本文讨论两种类型的极值问题,其中一种类型的极值问题可以认为是复平面上经典的Schwarz引理在高维的一个推广;另一种类型的极值是某空间上的度量,可以用来考虑域的双全纯等价分类问题．在本文中,k＜1时Cartan-Hartogs域与单位超球间的... 详细信息

本文讨论两种类型的极值问题,其中一种类型的极值问题可以认为是复平面上经典的Schwarz引理在高维的一个推广;另一种类型的极值是某空间上的度量,可以用来考虑域的双全纯等价分类问题．在本文中,k＜1时Cartan-Hartogs域与单位超球间的极值与极值映照被得到。

关键词：极值问题 Cartan-Hartogs域最大内切椭球

路氏乳杆菌JCM1081黏附相关蛋白的初步鉴定

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中华微生物学和免疫学杂志 2006年第6期26卷 539-543页

作者：王斌魏银萍袁静唐欢魏泓第三军医大学基础部实验动物学教研室重庆400038 西南大学生命科学院

目的研究路氏乳杆菌(Lactobacillus reuteri,也称罗伊氏乳杆菌)JCM1081菌体表面蛋白对其黏附HT-29细胞的影响。方法将路氏乳杆菌JCM1081菌体进行胰蛋白酶、蛋白酶K处理;用氯化锂和盐酸胍对乳杆菌表面的蛋白进行抽提,进行SDS-PAGE后与黏... 详细信息

目的研究路氏乳杆菌(Lactobacillus reuteri,也称罗伊氏乳杆菌)JCM1081菌体表面蛋白对其黏附HT-29细胞的影响。方法将路氏乳杆菌JCM1081菌体进行胰蛋白酶、蛋白酶K处理;用氯化锂和盐酸胍对乳杆菌表面的蛋白进行抽提,进行SDS-PAGE后与黏蛋白受体进行Western blot,并对杂交阳性蛋白进行质谱分析鉴定。结果路氏乳杆菌JCM1081菌体经胰蛋白酶、蛋白酶K处理后,其对HT-29细胞的黏附力显著下降(P<0．01);用氯化锂去除路氏乳杆菌JCM1081菌体外表面的S层蛋白后,路氏乳杆菌JCM1081对HT-29细胞的黏附力无显著变化;Western blot结果显示相对分子质量(Mr)为29×103和14×103的两种菌体表面蛋白与黏蛋白受体杂交中出现了强阳性;质谱分析结果显示29×103蛋白与路氏乳杆菌ATCC55730的h0793蛋白相似性高达71．1％。结论路氏乳杆菌JCM1081菌体表面的蛋白参与了乳杆菌的黏附,其中29×103和14×103的两种胞壁表面蛋白能够特异地识别黏蛋白受体并与之结合,29×103蛋白属ABC转运蛋白家族。

关键词：乳杆菌黏附 S层蛋白表面蛋白

Acute and chronic excitotoxicity in ischemic stroke and late-onset Alzheimer's disease

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Neural Regeneration Research 2025年第7期20卷 1981-1988页

作者： Shan ping Yu Emily Choi Michael QJiang Ling wei Department of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and Alzheimer's disease are common neurological disorders and often occur in the same *** comorbidity of the two neurological disorders represents a grave health threat to older *** review presents a brief background of the development of novel concepts and their clinical *** activity of glutamatergic N-methyl-D-aspartate receptors and N-methyl-D-aspartate receptor-mediated Ca^(2+)influx is critical for neuronal *** ischemic insult induces prompt and excessive glutamate release and drastic increases of intracellular Ca^(2+)mainly via N-methyl-D-aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked neuronal cell death in the ischemic core is dominated by necrosis within a few hours and days known as acute ***,mild but sustained Ca^(2+)increases under neurodegenerative conditions such as in the distant penumbra of the ischemic brain and early stages of Alzheimer's disease are not immediately toxic,but gradually set off deteriorating Ca^(2+)-dependent signals and neuronal cell loss mostly because of activation of programmed cell death *** on the Ca^(2+)hypothesis of Alzheimer's disease and recent advances,this Ca^(2+)-activated“silent”degenerative excitotoxicity evolves from years to decades and is recognized as a unique slow and chronic *** N-methyl-D-aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-D-aspartate receptor activity and is neuroprotective against both acute and chronic *** stroke and Alzheimer's disease,therefore,share an N-methyl-D-aspartate receptor-and Ca^(2+)-mediated mechanism,although with much different time *** is thus proposed that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for individuals who are susceptible to sporadic late-onset Alzheimer's disease and Alzheimer's disease-related

关键词： Ca^(2+)hypothesis cognitive deficits hyperactivity late-onset Alzheimer's disease neurodegeneration N-methyl-D-aspartate receptors N-methyl-D-aspartate receptor subunits pathogenesis preventive treatment

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基于Cookie的网盘资源在线溯源方法

通信学报 2016年第12期37卷 77-85页

作者：林海伦李焱王伟平岳银亮林政中国科学院信息工程研究所北京100093 国家计算机网络应急技术处理协调中心北京100029

网盘作为一种基于互联网的信息传播载体,其所分享的敏感资源已经在网络流量中占有越来越多的比例,因此,获取网盘资源的分享链接对于网络安全有着重要的意义。提出了一种高效可扩展的基于Cookie的网盘资源溯源方法—Cookie Tracing。该... 详细信息

网盘作为一种基于互联网的信息传播载体,其所分享的敏感资源已经在网络流量中占有越来越多的比例,因此,获取网盘资源的分享链接对于网络安全有着重要的意义。提出了一种高效可扩展的基于Cookie的网盘资源溯源方法—Cookie Tracing。该方法通过在海量的HTTP会话中建立Cookie与HTTP会话的索引表来实现网盘资源和下载网盘资源的跳转链的关联,同时通过累计散列算法加快溯源结果的验证。实验结果表明,所提方法具有较好的性能和可扩展性。

关键词：网盘资源分享链接 URL跳转链 Cookie HTTP会话