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1Reconstruction of precipitation variation from tree rings in recent 1000 years in Delingha, Qinghai显示文摘Using seven well-replicated Qilian juniper (Sabina przewalskii Kom.) ring-width chronologies developed at Zongwulong and Shalike Mts. in the northeastern part of the Qaidam Basin annual precipitation from previous July to current June in the recent 1000 years was re- constructed for Delingha. The reconstruction can capture 63.1% of precipitation variance and the equation was stable over time. For the reconstructed precipitation, wet periods occurred in AD1520—1633 and 1933—2001, whereas dry intervals in 1429—1519 and 1634—1741. In ad- dition, the magnitude in precipitation variation was lower before 1430 with about 15 mm, but it increased to 30 mm during the period of 1430 to 1850. After 1850, the precipitation variance de- creased again. In contrast to the increase in temperature, a decrease in annual precipitation was evident since the 1990s. The agreement in low-frequency variation between the reconstruction and the glacier accumulation and particulate content in Dunde ice cores during the recent several hundred years suggested that the precipitation reconstructed in this study was rather reliable, and represented a regional signal. This 1000-year reconstruction could benefit our understanding of climatic variation in decadal to century-scale in this region, and provide basic data to climate models and to prediction of future climate in the 21st century.SHAO Xuemei1, HUANG Lei1, LIU Hongbin2, LIANG Eryuan1, FANG Xiuqi3 & WANG Lili1 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. National Climate Center, Beijing 100081, China 3. Beijing Normal University, Beijing 100875, China 2005Science China Earth Sciences2005,48,7:113
2On adjacent-vertex-distinguishing total coloring of graphs显示文摘In this paper, we present a new concept of the adjacent-vertex-distinguishing total coloring of graphs (briefly, AVDTC of graphs) and, meanwhile, have obtained the adjacent-vertex-distinguishing total chromatic number of some graphs such as cycle, complete graph, complete bipartite graph, fan, wheel and tree.ZHANG Zhongfu, CHEN Xiang’en, LI Jingwen, YAO Bing, LU Xinzhong & WANG Jianfang College of Mathematics and Information Science, Northwest Normal University, Lanzhou 730070, China Department of Computer, Lanzhou Normal College, Lanzhou 730070, China Institute of Applied Mathematics, Lanzhou Jiaotong University, Lanzhou 730070, China College of Information and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, China 2005Science China Mathematics2005,48,3:173
3Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China显示文摘Under the impact of climatic warming, the glaciers in the High Asia in China have been retreating continuously with negative glacial mass balance in recent several decades. The retreat became more intensive in the past 10 years. The spatial pattern of the glacial retreat in the High Asia in China is that the smallest magnitude of retreat is in the inland of the Tibetan Plateau, the magnitude increases from the inland to the margin of the Tibetan Plateau, and the largest magnitude at the margin of the Tibetan Plateau. The glacial retreat in the High Asia in China has an important impact on the water resource of the arid regions in Northwest China. This study shows that the glacial retreat in the 1990s has caused an increase of 5.5% in river runoff in Northwest China. In the Tarim River basin, the increase of river runoff is higher than 5.5%.YAO Tandong 1,2 ,WANG Youqing 2 ,LIU Shiying 2,1 ,PU Jianchen 2,1 ,SHEN Yongping 2 & LU Anxin 2,1 1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100029,China 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China 2004Science China Earth Sciences2004,47,12:117
4Design of a new dynamical core for global atmospheric models based on some efficient numerical methods显示文摘A careful study on the integral properties of the primitive hydrostatic balance equations for baroclinic atmosphere is carried out, and a new scheme todesign the global adiabatic model of atmospheric dynamics ispresented. This scheme includes a method of weighted equal-areamesh and a fully discrete finite difference method with quadraticand linear conservations for solving the primitive equationsystem. Using this scheme, we established a new dynamical corewith adjustable high resolution acceptable to the availablecomputer capability, which can be very stable without anyfiltering and smoothing. Especially, some important integralproperties are kept unchanged, such as the anti-symmetries of thehorizontal advection operators and the vertical convectionoperator, the mass conservation, the effective energy conservationunder the standard stratification approximation, and so on. Somenumerical tests on the new dynamical core, respectively regardingits global conservations and its integrated performances inclimatic modeling, incorporated with the physical packagesfrom the Community Atmospheric Model Version 2 (CAM2) of NationalCenter for Atmospheric Research (NCAR), are included.WANG Bin, WAN Hui, Jl Zhongzhen, ZHANG Xin, YU Rucong, YU Yongqiang & LIU HongtaoState Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China Department of Computational Mathematics, Academy of Mathematics and System Sciences, Peking University, Beijing 100871, China 2004Science China Mathematics2004,47,z1:92
5Source mechanism of strong aftershocks (M_s≥5.6) of the 2008/05/12 Wenchuan earthquake and the implication for seismotectonics显示文摘Dozens of >M5, hundreds of >M4, and much more >M3 aftershocks occurred after the 2008/05/12 Wenchuan earthquake, which were well recorded by permanent and portable seismic stations. After relocated with P arrival, the >M3 aftershocks show two trends of distribution, with most of the aftershocks located along the north-east strike consistent with Longmenshan fault system, yet there is a north-west trend around the epicenter. It seems that substantially more aftershocks occur in regions with crystalline bedrocks. Then we collected waveform data from National Digital Seismograph Network and regional seismograph network of China, and employed 'Cut and Paste' method to obtain focal mechanisms and depths of the big aftershocks (M≥5.6). While most of those aftershocks show thrust mechanism, there are some strike slip earthquakes in the northern-most end of the rupture. Focal mechanisms show that the events located on the southern part of central Beichuan-Yingxiu Fault (BY) are mainly thrust earthquakes, which is consistent with initial mechanism of the main shock rupture. In the north part the aftershocks along the BY are also dominated by thrust slip, which is quite different from the right slip rupture of the main shock. Around Qingchuan-Pingwu Fault, the focal mechanisms are dominated by right-slip rupture with large depths (~18 km). So we suspected that in the north part the main shock might rupture on two faults: Beichuan Fault and Qingchuan-Pingwu Fault. The complex pattern of aftershock mechanisms argues for presence of a complicated fault system in the Longmenshan area.ZHENG Yong1,2,MA HongSheng3,Lü Jian4,NI SiDao5,LI YingChun6 & WEI ShengJi2 1 Institute of Geodesy and Geophysics,Chinese Academy of Sciences,Wuhan 430077,China 2 Institute of Geophysics,Chinese Earthquake Administration,Beijing 100086,China 3 Institute of Earthquake Science,Chinese Earthquake Administration,Beijing 100086,China 4 Earthquake Administration of Jiangxi Province,Nanchang 330039,China 5 School of Earth and Space Science,University of Science and Technology of China,Hefei 230026,China 6 Earthquake Administration of Jiangsu Province,Nanjing 210014,China 2009Science China Earth Sciences2009,52,6:100
6SHEsis,a powerful software platform for analyses of linkage disequilibrium,haplotype construction,and genetic association at polymorphism loci显示文摘In multiloci-based genetic association studies of complex diseases, a powerful and high efficient tool for analyses oflinkage disequilibrium (LD) between markers, haplotype distributions and many chi-square/p values with a large numberof samples has been sought for long. In order to achieve the goal of obtaining meaningful results directly from raw data,we developed a robust and user-friendly software platform with a series of tools for analysis in association study withhigh efficiency. The platform has been well evaluated by several sets of real data.Yong Yong SHI1,2, Lin HE2,3,*1Bio-X Life Science Research Center, Shanghai Jiao Tong University, Shanghai, China 2Institute for Nutritional Sciences, Shanghai Institute of Biological Sciences, Chinese Academy of Sciences, Shanghai,China 3NHGG, Bio-X Center, Shanghai Jiao Tong University, Shanghai, China 2005Cell Research2005,15,2:375
7慢性乙型肝炎防治指南显示文摘慢性乙型肝炎是我国常见的慢性传染病之一,严重危害人民健康.为进一步规范慢性乙型肝炎的预防、诊断和治疗,中华医学会肝病学分会和中华医学会感染病学分会组织国内有关专家,在参考国内外最新研究成果的基础上,按照循证医学的原则,制订了<慢性乙型肝炎防治指南>(以下简称<指南>).其中推荐的意见所依据的证据共分为3个级别5个等次[1],文中以括号内斜体罗马数字表示.Chinese Society of Hepatology and Chinese Society of Infectious Diseases,Chinese Medical Association. 42 Dongsi Xidajie,Beijing 100710,China 2005中华肝脏病杂志2005,13,12:1932
8非酒精性脂肪性肝病诊疗指南显示文摘非酒精性脂肪性肝病(NAFLD)是指除外酒精和其他明确的损肝因素所致的,以弥漫性肝细胞大泡性脂肪变为主要特征的临床病理综合征,包括单纯性脂肪肝以及由其演变的脂肪性肝炎(NASH)和肝硬化,胰岛素抵抗和遗传易感性与其发病关系密切。随着肥胖和糖尿病的发病率增加,NAFLD现已成为我国常见的慢性肝病之一,严重危害人民健康。为进一步规范NAFLD的诊断、治疗和疗效评估,中华医学会肝病学分会脂肪肝和酒精性肝病学组组织国内有关专家,在参考国内外最新研究成果的基础上,按照循证医学的原则,制定了《非酒精性脂肪性肝病诊疗指南》(以下简称(《指南》)。其中推荐的意见所依据的证据共分为3个级别5个等次,文中以括号内斜体罗马数字表示,推荐意见的证据分级,参见Ⅸ酒精性肝病诊疗指南》表1。Fatty Liver and Alcoholic Liver Disease Study Group of the Chinese Liver Disease Association. 2006中华肝脏病杂志2006,14,3:1509
9酒精性肝病诊疗指南显示文摘酒精性肝病是由于长期大量饮酒所致的肝脏疾病。初期通常表现为脂肪肝,进而可发展成酒精性肝炎、酒精性肝纤维化和酒精性肝硬化,严重酗酒时可诱发广泛肝细胞坏死甚或肝功能衰竭,该病是我国常见的肝脏疾病之一,严重危害人民健康。为进一步规范酒精性肝病的诊断和治疗,中华医学会肝病学分会脂肪肝和酒精性肝病学组组织国内有关专家,在参考国内外最新研究成果的基础上,按照循证医学的原则,制订了本《指南》。其中推荐的意见所依据的证据等级共分为3个级别5个等次,见表1,文中以括号内斜体罗马数字表示。Fatty Liver and Alcoholic Liver Disease Study Group of the Chinese Liver Disease Association. 2006中华肝脏病杂志2006,14,3:271
10肝衰竭诊疗指南显示文摘肝衰竭是临床常见的严重肝病症候群,病死率极高。多年来,各国学者对肝衰竭的定义、分类、诊断和治疗等问题不断进行探索,但迄今尚无一致意见。2005年美国肝病学会发布了对急性肝衰竭处理的建议,国内迄今尚无肝衰竭的诊断治疗指南。为适应临床工作需要,规范我国肝衰竭的诊断和治疗活动,中华医学会感染病学分会和中华医学会肝病学分会组织国内有关专家,制订了我国第一部《肝衰竭诊疗指南》(以下简称《指南》)。本指南的制定遵守了循证医学原则,借鉴了国内外最新研究成果,力求与国际接轨。其中推荐意见所依据的证据共分为3个级别5个等级(表1),文中以括号内斜体罗马数字表示。Liver Failure and Artificial Liver Group, Chinese Society of Infectious Diseases, Chinese Medical Association 2006中华肝脏病杂志2006,14,9:827
11肝纤维化中西医结合诊疗指南显示文摘肝纤维化在国际疾病分类(ICD-10)中可作为一种病名(K74-001),但主要是一种组织病理学概念。肝纤维化指肝组织内细胞外基质(ECM)成分过度增生与异常沉积,导致肝脏结构或(和)功能异常的病理变化,结构上表现为肝窦毛细血管化与肝小叶内以及汇管区纤维化;功能上可以表现为肝功能减退、门静脉高压等。其形成机制主要由于肝炎病毒、乙醇、药物与毒物、血吸虫、代谢和遗传、胆汁淤积、自身免疫性肝病等多种损伤因素长期慢性刺激肝脏,使肝窦内肝星状细胞的活化,胶原等ECM成分代谢失衡,生成大于降解,促使肝脏ECM沉积与组织结构重构。Liver Disease Committee,Chinese Association of Integrative Medicine. 2006中华肝脏病杂志2006,14,11:269
12肝衰竭诊疗指南显示文摘Liver Failure and Artficial Liver Group,Chinese Society of Infectious Diseases,Chinese Medical Association 2006实用肝脏病杂志2006,9,6:188
13非酒精性脂肪性肝病诊疗指南显示文摘Fattly Liver and Alcoholic Liver Disease Study Group of the Chinese Liver Disease Association. 2007实用肝脏病杂志2007,10,1:145
14瑞舒伐他汀治疗中国高胆固醇血症患者疗效和安全性的随机双盲多中心对照研究显示文摘目的评价瑞舒伐他汀治疗中国高胆固醇血症患者的疗效和安全性。方法采用随机、双盲、多中心研究。患者经6周筛选后符合 LDL-C≥4.14 mmol/L(160 mg/dl),<6.50 mmol/L(250 mg/dl)、TG<4.52 mmol/L(400 mg/dl)者以2:1随机接受瑞舒伐他汀10 mg/d 或阿托伐他汀10mg/d 治疗。12周后瑞舒伐他汀组 LDL-C 未达到 ATPⅢ治疗目标者,予瑞舒伐他汀20 mg 延续治疗8周。结果 304例进入随机治疗阶段,瑞舒伐他汀10 mg/d 组201例,阿托伐他汀10 mg/d 组103例。意向治疗人群290例,符合方案人群263例。瑞舒伐他汀组治疗12周后血 LDL-C 显著下降,下降幅度为45.6%,显著大于阿托伐他汀组的39.0%(P<0.001)。瑞舒伐他汀组患者 LDL-C 达标率也较阿托伐他汀组(78.0%比72.7%)有增高趋势,且在高危人群中优势更为明显(56.5%比35.0%),但差异未达到统计学意义。瑞舒伐他汀降低 TG(-22.8%)以及升高 HDL-C(+6.6%)和ApoA-1(+12.5%)的幅度与阿托伐他汀组差别无统计学意义(分别为-16.6%,+4.3%和+9.8%)。29例患者接受20 mg/d 瑞舒伐他汀延续治疗,22例完成治疗患者中10例(45.5%)LDL-C达标。研究中未发现药物相关的严重不良反应事件。结论本组研究显示瑞舒伐他汀10 mg 降低LDL-C 的疗效优于同等剂量的阿托伐他汀,治疗3个月安全性与之类似。Rosuvastatin Registration Clinical Trial Group.Cardiovascular Institute and Fu Wai Hospital,Peking Union Medical College and Chinese Academy of Medical Science,Beijing 100037,China 2007中华心血管病杂志2007,35,3:117
15睡眠呼吸暂停人群高血压患病率的多中心研究显示文摘目的调查我国睡眠呼吸暂停人群高血压患病情况和影响因素。方法纳入2004至2006年全国20家三甲医院呼吸内科门诊就诊的2297例患者,男:女为1310:211,均经过询问病史、体格检查和多导睡眠监测。统一使用中华医学会呼吸病学分会睡眠呼吸疾病学组编制的《睡眠呼吸暂停与高血压发病情况问卷调查表》对受试者进行问卷和规范的血压测量。应用 SPSS 11.0软件包进行数据分析,采用 X^2检验比较高血压患病率。结果呼吸暂停低通气指数(AHI)<5次/h 组(213例)的高血压患病率(23.5%)明显低于 AHI≥5次/h 组(2084例)的高血压患病率(49.3%);阻塞性睡眠呼吸暂停低通气综合征(OSAHS)人群的高血压患病率为56.2%(569/1012);有高血压家族史人群的高血压患病率为63.7%(450/706),明显高于无家族史者39.4%(627/1591)的患病率;AHI≥5次/h 组的高血压患病几率是 AHI<5次/h 组的3倍(OR=3.167,95%CI 为2.953~5.426,P<0.01);受试人群的高血压患病率随 AHI 增加而增加,自 AHI 16~20次/h 起患病率增高幅度明显加大,AHI 66~70次/h 以后呈下降趋势。经计算得出公式:高血压患病率=0.3199+0.0042×AHI;高血压患病的 OR 值=1.018+0.017×AHI,同时,受试者的高血压患病率随睡眠最低血氧饱和度的减低而明显增高,随嗜睡指数增高而明显增高。受试人群的 AHI 为独立于年龄、性别、体重指数和高血压家族史之外的高血压危险因素。结论睡眠呼吸暂停人群的高血压患病率明显高于无睡眠呼吸暂停人群,睡眠呼吸暂停与高血压患病率有密切的相关关系,是独立于年龄、体重指数和高血压家族史的高血压患病危险因素。Sleep Breathing Disorder Group of Respiratory Diseases Branch,Chinese Medical Association 2007中华结核和呼吸杂志2007,30,12:123
16我国面临快速增长的终末期肾病治疗负担显示文摘目的报告2008年我国终末期肾脏病维持性透析患病率和发病率,并估计未来维持性透析的趋势。方法中国医院协会血液净化中心管理分会制定调查表,以透析登记软件及纸质版形式下发至各省、自治区和直辖市的血液净化中心管理分会/血液净化质量控制中心,收集各透析室的数据,包括2007年底和2008年底患者数量,以及2008年新进入透析的患者数量;患者的性别和年龄构成;导致终末期肾脏病(ESRD)的原因以及所有死亡患者的原因。分析2007和2008年底ESRD的点患病率、2008年ESRD发病率、ESRD病因以及死亡原因构成。结果全国31个省、自治区和直辖市中,27个应答。2007年底,共报告65074例ESRD患者,点患病率为每百万人口51.7;2008年底患者数增至102863例,点患病率为每百万人口79.1,患病率增长52.9%。2008年ESRD新患者数为45423例,发病率每百万人口36.1。ESRD的病因依次为肾小球肾炎(45%)、糖尿病(19%)、高血压(13%)、多囊肾病(2%)和其他或未知(20%)。ESRD主要死亡原因是心血管疾病(31%)、中风(20.3%)、感染(19.9%)和其他(28.8%)。结论虽然我国ESRD的患病率显著低于其他亚洲国家和地区,但发病率极高,未来几年患病率也将快速增加,从而增加我国ESRD的治疗负担。Li Zuo M.D.1 and Mei Wang M.D.2 for Chinese Society of Blood Purification Institute of Nephrology,Peking University First 1 Hospital Institute of Nephrology,Peking University People’s Hospital 2 2010中国血液净化2010,,1:145
17慢性乙型肝炎防治指南(2010 年版)显示文摘为规范慢性乙型肝炎的预防、诊断和治疗,中华医学会肝病学分会和感染病学分会于2005年组织国内有关专家制订了《慢性乙型肝炎防治指南》。近5年来,国内外有关慢性乙型肝炎的基础和临床研究取得很大进展,为此我们对该指南进行更新。Chinese Society of Hepatology and Chinese Society of Infectious Diseases,Chinese Medical Association 2011传染病信息2011,24,1:95
18慢性乙型肝炎防治指南(2010年版)显示文摘为规范慢性乙型肝炎的预防、诊断和治疗,中华医学会肝病学分会和感染病学分会于2005年组织国内有关专家制订了《慢性乙型肝炎防治指南》[1]。近5年来.国内外有关慢性乙型肝炎的基础和临床研究取得了很大进展.为此我们对该防治指南进行了更新。Chinese Society of Hepatology and Chinese Society of Infectious Diseases,Chinese Medical Association. 2011胃肠病学2011,16,6:111
19Spatiotemporal variations of vegetation cover on the Chinese Loess Plateau(1981―2006):Impacts of climate changes and human activities显示文摘Spatiotemporal variations of Chinese Loess Plateau vegetation cover during 1981-2006 have been investigated using GIMMS and SPOT VGT NDVI data and the cause of vegetation cover changes has been analyzed, considering the climate changes and human activities. Vegetation cover changes on the Loess Plateau have experienced four stages as follows: (1) vegetation cover showed a continued increasing phase during 1981―1989; (2) vegetation cover changes came into a relative steady phase with small fluctuations during 1990―1998; (3) vegetation cover declined rapidly during 1999―2001; and (4) vegetation cover increased rapidly during 2002―2006. The vegetation cover changes of the Loess Plateau show a notable spatial difference. The vegetation cover has obviously increased in the Inner Mongolia and Ningxia plain along the Yellow River and the ecological rehabilitated region of Ordos Plateau, however the vegetation cover evidently decreased in the hilly and gully areas of Loess Plateau, Liupan Mountains region and the northern hillside of Qinling Mountains. The response of NDVI to climate changes varied with different vegetation types. NDVI of sandy land vegetation, grassland and cultivated land show a significant increasing trend, but forest shows a decreasing trend. The results obtained in this study show that the spatiotemporal variations of vegetation cover are the outcome of climate changes and human activities. Temperature is a control factor of the seasonal change of vegetation growth. The increased temperature makes soil drier and unfavors vegetation growth in summer, but it favors vegetation growth in spring and autumn because of a longer growing period. There is a significant correlation between vegetation cover and precipitation and thus, the change in precipitation is an important factor for vegetation variation. The improved agricultural production has resulted in an increase of NDVI in the farmland, and the implementation of large-scale vegetation construction has led to some beneficial effect in ecology.XIN ZhongBao1,2, XU JiongXin1 & ZHENG Wei1, 2 1 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China 2008Science China Earth Sciences2008,51,1:112
20Value of ecosystem services in China显示文摘The function and services are the important components of the life-support system in theplanet, as well as the basic elements for sustainable development of environment and society. It is a must to evaluate it for incorporating it with the social-economic system. It is also an important approach to draw the public attention on the environmental and ecosystem conservation. In this study, the ecosystem function and services in China were estimated by employing the classification and economic parameters from Costanza et al. The type and area of terrestrial ecosystems were extracted from Vegetation Map of China (1:4 000 000), and then the distribution map of ecosystem services of China was drawn. According to our calculation, the total value of ecosystem services in China is 77 834.48×108 RMB yuan per annum. The value for terrestrial ecosystem is 56 098.46×108 yuan per annum, and that for marine ecosystem is 21 736.02×108 yuan per annum. The value of ecosystem services in China is 1.73 times biggerCHEN Zhongxin & ZHANG XinshiLaboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Current address: Institute of Natural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China 2000Chinese Science Bulletin2000,45,10:128
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