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    题名 作者 年代 出处 被引量
1CO_2浓度变化和气候变化对中国陆地生态系统净初级生产及其平衡的影响(英文)显示文摘本文应用陆地生态系统模型(TEM,4.0)对中国陆地生态系统在目前气候下的净初级生产力,以及在CO2浓度增加和气候变化后的净初级生产力的变化进行了预测。气候变化模型采用三种大气环流模型生成,即:GISS、GFDL和OSU模型。在当前气候条件和CO2浓度(312.5×10-6)下,TEM模型预测中国陆地生态净初级生产力为3,653TgC·a-1(1012gC·a-1)。温带常绿阔叶林是生产力最高的生物区,占有中国净初级生产力的最大比例。NPP的空间格局主要与降水量和温度的空间分布相关联。中国陆地生态系统的年净初级生产力对CO2浓度和气候的变化敏感。在陆地区域尺度上,其年净初级生产力仅在CO2浓度上升至519×10-6的情况下可增加6.0%(219TgC·a-1)。在气候变化而无CO2浓度变化的条件下,净初级生产力的响应在GISS气候方案下表现为1.5%(54.8TgC·a-1)的降低,在GFDL-q气候方案下表现为8.4%(306.9TgC·a-1)的增加。在气候和CO2浓度均发生变化的情况下,净初级生产力有较大程度的增加,在GISS气候方案下的增加比例为18.7%(683TgC·a-1),在GFDL-q气候?Xiao 1,2 , X., J.M.Melillo 1, D.W.Kicklighter 1, Y.Pan 1, A.D.McGuire 3 and J.Helfrich 1 ( 1The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA 02543, USA) ( 2 The Joint Program on the Science and Policy of Globa 1998植物生态学报1998,22,2:35
2INITIAL VALUE PROBLEMS FOR SECOND ORDER IMPULSIVE INTEGRO-DIFFERENTIAL EQUATIONS IN BANACH SPACES显示文摘INITIALVALUEPROBLEMSFORSECONDORDERIMPULSIVEINTEGRO┐DIFFERENTIALEQUATIONSINBANACHSPACES**GUODAJUN*AbstractManuscriptreceivedJu...GUO DAJUN *Department of Mathematics,Shandong Universty,Jinan 250100,Shandong,China. **Project supported by the National Natural Science Foundation of China and the Doctoral Program Foundation of the State Education Commission of China. 1997Chinese Annals of Mathematics,Series B1997,18,4:28
3中国成人乙型肝炎免疫预防技术指南显示文摘一、引言 乙型肝炎(乙肝)是由乙肝病毒(HBV)引起的以肝脏损坏为主要病变的传染病,全球均有分布,但我国是HBV感染率较高的国家。我国自1992年起在全国实施新生儿接种乙肝疫苗工作,并将乙肝疫苗纳入儿童计划免疫管理。1992和2006年我国开展了两次乙肝血清流行病学调查,Chinese Prevention Medicine Association,National Immunization Program,Chinese Center for Disease Control and Prevention 2012中国病毒病杂志2012,2,1:22
4Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning,Northeast China显示文摘A multituberculate skeleton from the Lower Cretaceous Yixian Formation at Dawangzhangzi, Lingyuan City, Liaoning Province, Northeast China, provides new morphological information for early multituberculates. The specimen is the holotype of Sinobaatar lingyuanensis gen. et sp. nov. It has a narrow skull that lacks the superorbital crest or postorbital process. The dental formula is 3·?·5·2/1·0·3·2. The dental morphology, especially that of cheek teeth, of S. lingyuanensis is similar to that of Eobaatar, which places it in the family Eobaataridae. The postcranial skeleton of Sinobaatar is similar to that of other multituberculates. As in Holotheria, Metatarsal V of Sinobaatar articulates only with the cuboid and has no contact with the calcaneus, which probably represents the primitive condition of multituberculates. Nine carpals of Sinobaatar resemble those of Zhang-heotherium, except the centrale being larger than the trape-zoid. The dental features of Sinobaatar show again that eo-baatarids areHU Yaoming & WANG YuanqingInstitute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 10044, China American Museum of Natural History, New York, NY 10024, USA Biology Program (Ecology, Evolutionary Biology, and Behavio 2002Chinese Science Bulletin2002,47,11:17
51997年全国艾滋病哨点监测报告显示文摘1997年,全国HIV监测哨点共调整为60个,分布在27个省(自治区、直辖市)。性病门诊哨点和长卡哨点中只检出极少数HIV感染者。1997年,在3个暗娼哨点中的检出率约为1%~2%,而1996年同期仅为不到0.5%;在12个吸毒哨点中有7个哨点(包括2个新增哨点)报告了HIV感染者,而在1996年同期8个哨点中有3个哨点报告了感染者。新疆自治区报告了83例(20.8%)感染者,而在前几年同期同一哨点只有32例(8.0%)。在大部分吸毒监测哨点中的静注比例正不断增加或保持一个较高水平。暗娼人群中有60%从不使用避孕套。该监测结果表明,局部地区吸毒者中HIV感染率在不断上升,HIV波及的地区在不断地增多,HIV感染已开始向性乱人群扩散;可引起HIV流行的危险因素在不断增加。Department of Disease Control,Ministry of Health,People′s Republic of China 1 Center for AIDS Surveillance,Chinese Academy of Preventive Medicine 2 Group of National HIV Sentinel Surveillance Program (Written by Qu Shuquan 2,Sun Xinhua 1,Zheng X 1998中国性病艾滋病防治1998,4,4:15
61996年中国艾滋病哨点监测报告显示文摘我国自1995年开始在23个省(自治区、直辖市)的42个哨点中对性传播疾病(STDs)门诊就诊者、暗娼、吸毒者和长途卡车司机四类人群进行监测,当年监测结果显示,在监测哨点所在的城市中,被监测的STDs门诊就诊者、暗娼、吸毒者和长途卡车司机人群中HIV感染率均很低,但存在广泛传播的危险性。1996年第一轮共监测10085人,发现HIV感染者35例。其中在STDs门诊就诊者中发现HIV感染者1例,在吸毒者中发现HIV感染者34例(其中新疆32例);第二轮监测11909人,发现HIV感染者72例,其中在暗娼人群中发现1例,在吸毒人群中发现71例(其中新疆69例)。1996年监测结果表明,在哨点所在的城市中,尽管被监测的STDs门诊就诊者、暗娼和长途卡车司机人群中HIV感染率仍很低,但我国HIV流行形势已发生改变,HIV感染的流行已不仅仅局限于云南吸毒者中,在其它地区已开始在吸毒者中流行,个别地区该人群中HIV感染率上升很快。Department of Disease control.Ministry of Health,People′s Republic of China 1 Center for AIDS Surveillance,Chinese Academy of Preventive Medicine 2 Group of National HIV sentinel surveillance program (Written by Qu Shuquan 2,Sun Xinhua 1,Zheng Xiwen 1997中国性病艾滋病防治1997,3,5:12
7Boundary Layer Theory and the Zero-Viscosity Limit of the Navier-Stokes EquationWeinan E Department of Mathematics and Program in Applied and Computational Mathematics,Princeton University,USA 2000Acta Mathematica Sinica,English Series2000,16,2:10
8An electron microscopic-cytochemical localization of plasma membrane Ca^(2+)-ATPase activity in poplar apical bud cells during the induction of dormancy by short-day photoperiods显示文摘Plasma membrane (PM) Ca2+-ATPase activity in poplar apical bud meristematic cells during short-day (SD)-induced dormancy development was examined by a cerium precipitation EM-cytochemical method. Ca2+-ATPase activity, indicated by the status of cerium phosphate precipitated grains, was localized mainly on the interior face (cytoplasmic side) of the PM when plants were grown under long days and reached a deep dormancy. A few reaction products were also observed on the nuclear envelope.When plant buds were developing dormancy after 28 to 42 d of SD exposure, almost no reaction products were present on the interior face of the PM. In contrast, a large number of cerium phosphate precipitated grains were distributed on the exterior face of the PM. After 70 d of SD exposure, when buds had developed a deep dormancy, the reaction products of Ca2+-ATPase activity again appeared on the interior face of the PM. The results seemed suggesting that two kinds of Ca2+-ATPases may be present on the PM during the SD-induced dormancy in poplar.One is the Ca2+-punlping ATPase, which is located on the interior face of the PM, for maintaining and restoring the Ca2+homeostasis. The other might be an ecto-Ca2+-ATPase, which is located on the exterior face of the PM, for the exocytosis of cell wall materials as suggested by the fact of the cell wall thickening during the dormancy developlnent in poplar.JIAN LING CHENG JI HONG LI PAUL H LI TONY HH CHEN(Tel: 1612 624 1757 Fax: +1612 624 4941 E-mail: lixxx008@tc.umn.edu)(1Laboratory of Plant Hardiness, Department of Horticultural Science and Plant Biological Sciences Program, University of Minnesota, 2000Cell Research2000,10,2:9
9Basic and translational aging research in China: present and future显示文摘The percentage of elderly people in the world is increasing at an unprecedented pace;so it is in China, which has the world s largest population and a high ratio of the seniors (aged 60 and above) to working-age adults. The growing elderly population is presenting a major social challenge. Accordingly, it is not only imperative as a national strategic demand but also promises great scientific values to understand the biological process of aging, explore the mystery of healthy aging, delay the aging process, and treat the age-related diseases. This Perspective summarizes past and present advances of the basic and translational aging research in China and offers perspectives on future endeavors in this area.Xiaojuan He Moshi Song Jing Qu Yansu Guo Heqi Cao Ruijuan Sun Guang-Hui Liu Yong Shen Major Program Expert Group 2019Protein & Cell2019,10,7:8
10中国太湖1950年以来主要环境的变化和迅速富营养化的开始显示文摘太湖是我国第三大淡水湖,面积2350km2,位于长江三角洲(面积35000km2)的中部,自6000年前太湖形成以来,湖泊经历了几个主要变化。1950年以前,太湖最明显的变化发生在海侵和湖盆大小。海侵是太湖形成的主要原因。太湖形成后,在不同的干燥和湿润时期,湖盆经历了由一系列的小湖或统一湖盆之间的波动。但一般来说,近2000年以来,湖盆的大小在增大。然而1950年以后,为适应人口的增长,许多浅水地带被改造成农田和鱼塘。50年代以来,对湖盆和流域的进一步利用导致湖泊发生了一些变化。在这个阶段太湖的主要变化是:1)对排水流域、湖泊生态和营养状况具有重大影响的堤坝的修筑和湖岸的改造;2)始于1983/1984年湖泊的迅速富营养化。湖泊迅速富营养化的主要原因是由于工业、农业和城市化的迅速增长,导致未经处理的废水排入湖盆。每年这些营养物大量排入,对湖泊的营养状况影响甚重,在低水位时尤其如此。William Y.B.Chang(Center for Great Lakes and Aquatic Sciences and School of Natural Resources and Environment,the University of Michigan,Ann Arbor,Michigan 48109,U.S.A.andDivision of International Programs National Science Foundation,Foundation,Arlington, 1996古生物学报1996,35,2:8
11Mitochondrial DNA A1555G mutation screening using a testing kit method and its significance in preventing aminoglycoside-related hearing loss显示文摘To report a new screening method for mitochondrial DNA 1555A→G mutation and the results of genotype analysis in 19 maternal inherited deafness pedigrees. Method Five hundred and forty-six non-syndromic neuro-sensory hearing loss patients were tested for 1555A→G mutation using a new compact testing kit, which allows clear distinction between wild type and 1555 A→G mutated mtDNAs. Results Nineteen subjects among the 546 patients (3.48%) were found to carry mtDNA A1555G mutation. The results were confirmed by sequencing in an ABI 3100 Avant sequencer. Conclusions Maternal inherited deafness families are a frequently seen in outpatient group. The detection of mtDNA 1555 A→G mutation with a low cost, ready to use detection kit is needed and suitable in China for large scale screening and preventive testing before usage of aminoglycoside antibiotics.LIU Xin,1 DAI Pu,1* HUANG Deliang,1 YUAN Huijun,1 LI Weiming,1 YU Fei,1 ZHANG Xin,1 KANG Dongyang,1 CAO Juyang,1 YANG Weiyan,1 HAN Dongyi,1 JIN Zhengce2, GUAN Minxin3 1. Department of Otolaryngology, Chinese PLA General Hospital, Beijing, China2. Weihai Aomaier Gene Technological CO.,LTD.,Weihai,Shandong 264200, China.3. Division and Program in Human Genetics and Center for Hearing and Deafness Research, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA 2006Journal of Otology2006,1,1:7
12Molecular pathogenetic mechanism of maternally inherited deafness显示文摘GUAN Min - XinDivision and Program in Human Genetics and Center for Hearing and Deafaess Research,Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, Universityof Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA 2003中华耳科学杂志2003,1,3:6
13The high order Schwarz-Pick lemma on complex Hilbert balls显示文摘In this paper we prove a high order Schwarz-Pick lemma for holomorphic mappings between unit balls in complex Hilbert spaces.In addition,a Schwarz-Pick estimate for high order Fréchet derivatives of a holomorphic function f of a Hilbert ball into the right half-plane is obtained.DAI ShaoYu1,2,CHEN HuaiHui1 & PAN YiFei3,4 1Department of Mathematics,Nanjing Normal University,Nanjing 210097,China 2Department of General Study Program,Jinling Institute of Technology,Nanjing 211169,China 3School of Mathematics and Informatics,Jiangxi Normal University,Nanchang 330022,China 4Department of Mathematical Sciences,Indiana University-Purdue University Fort Wayne,Fort Wayne,IN 46805-1499,USA 2010Science China Mathematics2010,53,10:6
14An Internal State Variable Model for the Low Temperature Tempering of Low Alloy Steels显示文摘An internal state variable (ISV) framework is used to predict the rate and degree of strain relaxation associated with the stage I, low temperature tempering of martensite. A single variable tracks the change in volume between the tempered an untempered structures. The rate at which this occurs is taken to be a function of martensite fraction, temperature, degree of tempering, and carbon concentration. Experimental dilatometty data is used to both fit and validate the model.Mark T. Lusk, Young-Kook Lee, Herng-Jeng Jou, William H. Elliott, Gerard M Ludtka 1.Materials Science Program, Division of Engineering, Colorado School of Mines, Golden, CO. U.S. 80401 2.Questek Innovations LCC, 1801 Maple Avenue, Evanston, IL, U.S. 602 2000Journal of Shanghai Jiaotong university(Science)2000,5,1:5
15Paeoniflorin protects cells from GalN/TNF-α-induced apoptosis via ER stress and mitochondria-dependent pathways in human L02 hepatocytes显示文摘Paeoniflorin (PF ) 是从 Paeonia lactiflora 的根提取的主要有效部件之一,它临床上被使用了在未知的内在的 mechanismremain 的繁体中文药,而是细节对待肝炎。现在的学习被设计在 d-galactosamine (GalN ) 和肿瘤坏死因素上调查 PF 的保护的效果的机制 --(TNF-) 用人的 L02 hepatocytes 导致了房间 apoptosis。我们 PF 能稀释的 resultsconfirmed GalN/TNF -- 以一种剂量依赖者方式的导致的 apoptotic 房间死亡。mitochondrialmembrane 潜力和细胞内部的 Ca 2+ 集中的骚乱的混乱被 PF 也恢复。西方的污点分析表明 GalN/TNF- 导致了一个 numberof 签名 endoplasmic 蜂窝胃的激活(嗯) 压力和 mitochondrial 标记,当 PF 预告的处理在他们上有显著 dose-dependentsuppression 时。另外, PF 的 anti-apoptotic 效果被 caspase-3/9activities 的抑制进一步在 L02 房间证实。这些调查结果建议那 PF 能有效地禁止与调整调停人有关的 hepatocyte apoptosis 和内在的 mechanismis 在嗯压力和线粒体依赖者小径。Zequn Jiang Funding This work was supported by grants from the National Natural Science Foundation of China (81072777 and 81273638) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).Weiping Chen Xiaojing Yan Lei Bi Sheng Guo Zhen Zhan 2014Acta Biochimica et Biophysica Sinica2014,46,5:5
16七年制高等医学教育教学质量与学位授予质量检查总结报告显示文摘Organized by the Higher Education Department of the State Education Commission and theAcademic Degree Committee of the State Council,an inspection and evaluation of the instructionand academic degree award of 7-year program in clinical medicine and stomatological medicine of15 medical colleges and universities had been conducted for 30 days by 79 medical education expertsand scholars.The result shows that 42l graduates possess the designed qualifications in thecomprehensive quality morally,intellectually and physically.The experience of running 7-yearprogram has promoted the educational reform and development with an overall improvement ofeducational quality of these medical colleges and universities.The Inspection Party of the Instruction and Academic Degree Award Quality of 7-Year Higher Medical Education Program 1996中国高等医学教育1996,,2:4
17National Public Health Surveillance in China: Implications for Public Health in China and the United States显示文摘Study Objective:Throughout the world, political developments have brought new demands to communities to prevent and intervene in the incidence of infectious and noninfectious conditions.Historically, these developments have required new and more effective public health surveillance ac tivities. This report describes public health surveillance practice in the People’s Republic of China,making comparisons with selected aspects of surveillance in the United States with respect to collec tion, analysis, diasemination, and use of data. Main results: In both the People’s Republic of China and the United States, political change has affected health, and multiple surveillance system are used in public health practice. Surveillance of acute infectious diseases based on the reporting of legally notifiable diseases and the use of vital records for surveillance have the longest established history in both countries. In both countries, da ta from the surveillance systems have been used to affect public health policy.Conclusions: In comparing surveillance practices in there countries, we find similarities in con ditions reported and in the dissemination of the data. At the same time, legal, aseial, cultural, and economic differences between the nations have affected the practice of surveillance in analysis and evaluation. We make explicit recommendations for improvement and evaluation of systems in both countries including sentinel surveillance system and data quality measures in China and computer networking and data analysis in the UnitedYANG GONG-HUAN DONNA F. STROUP AND STEPHEN B. THACKER (Institute of Epidemiology and Microbiology, Chinese Academy of Preventive Medicine, 27 Nan Wei Rd., Beijing 100050, China Epidemiology Program Office (Mail Stop C08 ),Centers for Disease Control 1997Biomedical and Environmental Sciences1997,10,1:4
18中国数学规划学科发展概述显示文摘数学规划又称数学优化,是运筹学的一个重要分支.它主要研究在一定约束条件下,如何求一个实数或者整数变量的实函数的最大值或者最小值.它是运筹学和管理科学中最常用的一种建模工具和求解问题的方法,在工程、经济和金融等领域有非常广泛的应用.首先简单介绍数学规划的发展历史、应用领域及其主要研究方向;然后简述数学规划的发展现状和在中国的发展进程;最后,讨论数学规划若干研究前沿问题与研究展望.The Mathematical Programming Branch of Operations Research Society of China 2014运筹学学报2014,18,1:4
19CATALYTIC RESEARCH FOR CLEAN ENERGY AND ULTRA-CLEAN FUELS IN THE 21^(st) CENTURY Future Perspectives显示文摘本文系由大连理工大学王祥生教授 (本刊编委 )和郭新闻教授约请美国宾州大学宋春山博士撰写的“2 1世纪清洁能源和超清洁燃料催化研究的未来展望”述评。在本文中笔者系统而扼要地回顾了 2 0世纪全球能源消耗及供求的情况 ,展望了 2 1世纪催化研究面临的机遇 ,着重讨论了清洁能源 ,对催化而言应把综合和有效利用能源作为研究方向。笔者结合美国情况介绍了许多有用的统计数字 ,重点结合自己的研究工作比较全面地阐述了能源燃料工业对催化研究的需求及其机遇。它包括了清洁运输燃料、重油轻质化增产中间馏分油、制氢和燃料电池、天然气利用、天然气液化、替代燃料的发展、煤的综合利用、专用化学品的合成以及CO2 的转化和利用等。煤既作为生产清洁燃料的原料 ,又作为生产专用化学品的资源 ,把在炼油化工中已经取得卓越成果的催化技术、分子筛催化过程转移到煤化工领域 ,笔者对此提出了比较完整的方案。这些对于读者都有很大的帮助。Chun-shan SONG (Clean Fuels and Catalysis Program, The Energy Institute, and Department of Energy & Geo-Environmnetal Engineering, Pennsylvania State University, 209 Academic Projects Building, University Park, PA 16802, USA) 2002石油学报(石油加工)2002,18,6:4
20Effects of Internal Flow on Vortex-Induced Vibration and Fatigue Life of Submarine Pipelines显示文摘- With the rapid development of the offshore oil industries, submarine oil / gas pipelines have been widely used. Under the complicated submarine environmental conditions, the dynamic characteristics of pipelines show some new features due to the existence of both internal and external flows. The paper is intended to investigate the vortex-induced vibration of the suspended pipeline span exposed to submarine steady flow. Especially, the effects of the flow inside the pipeline are taken into account. Its influences on the amplitude of pipeline response, and then on the fatigue life, are given in terms of the velocity of the internal flow.Shen Zhonghan and Zhao Qiang Professor, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080Applied and Computation Analysis and Modeling (ACAM) Program, Louisiana Tech University, PO Box 3827, LA 71272, USA 1996China Ocean Engineering1996,11,3:3
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