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无心电图同步,采用高螺距双源CT行全主动脉CTA检查:初步经验

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国际医学放射学杂志 2012年第2期 191-192页

作者： M.Beeres B.Schell A.Mastragelopoulos e.herrmann J.M.Kerl T.Gruber-Rouh 李艳辉 Department of Diagnostic and Interventional Radiology Clinic of the Goethe UniversityHaus 23C UGTheodor-Stern-Kai 760590 FrankfurtGermany

目的研究无心电图同步,采用高螺距双源CT行全主动脉CTA检查的可行性、影像质量和辐射剂量。方法每组40例病人接受CTA检查,第1组采用16层CT扫描,第2组采用双源CT的常规单源扫描,第3组采用双源CT的3.0

关键词： CT血管成像主动脉高螺距双源CT 辐射剂量运动伪影

应用新型探头瞬时弹性成像对肥胖病人非酒精性脂肪肝进行无创性分期

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国际医学放射学杂志 2010年第6期 591-592页

作者： M.Friedrich-Rust H.Hadji-Hosseini S.Kriener e.herrmann I.Sircar A.Kau 何岸苇 Department of Internal Medicine 1 Johann Wolfgang Goethe-University HospitalTheodor-Stern-Kai 760590Frankfurt am MainGermany.Mireen

目的瞬时弹性成像(Te)在非酒精性脂肪肝(NAFLD)和脂肪肝(NASH)病人的肝纤维化分期中已显示出显著的结果,而25%的肥胖病人使用标准Te探头时不能检查出上述病变。这项研究的目的是评价一种新型的XL

关键词：超声纤维扫描肝脏活检脂肪肝非酒精性脂肪肝

Intense atmospheric pollution modifies weather: a case of mixed biomass burning with fossil fuel combustion pollution in eastern China

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Intense atmospheric pollution modifies weather: a case of mi...

长三角臭氧和细颗粒污染及其对区域污染控制和污染-气候相互作用的启示:SORPeS观测站最新进展

第八届全国优秀青年气象科技工作者学术研讨会

作者： A.J.Ding C.B.Fu X.Q.Yang J.N.Sun T.Petj V.-M.Kerminen T.Wang Y.Xie e.herrmann L.F.Zheng W.Nie Q.Liu X.L.Wei M.Kulmala Institute for Climate and Global Change Research & School of Atmospheric Sciences Nanjing University Department of Physics University of Helsinki Department of Civil and environmental engineering The Hong Kong Polytechnic University Shenzhen Meteorological Bureau

The influence of air pollutants, especially aerosols,on regional and global climate has been widely investigated,but only a very limited number of studies report their impacts on everyday weather. In this work, we present for the first time direct（observational） evidence of a clear effect of how a mixed atmospheric pollution changes the weather with a substantial modification in the air temperature and *** using comprehensive measurements in Nanjing, China,we found that mixed agricultural burning plumes with fossil fuel combustion pollution resulted in a decrease in the solar radiation intensity by more than 70 %, a decrease in the sensible heat by more than 85 %, a temperature drop by almost10 K, and a change in rainfall during both daytime and nighttime. Our results show clear air pollution–weather interactions, and quantify how air pollution affects weather via air pollution–boundary layer dynamics and aerosol–radiation–cloud feedbacks. This study highlights cross-disciplinary needs to investigate the environmental, weather and climate impacts of the mixed biomass burning and fossil fuel combustion sources in east China.

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长三角臭氧和细颗粒污染及其对区域污染控制和污染-气候相互作用...

肝纤维化分期声辐射脉冲成像作用的Meta分析

十一届全国气溶胶会议暨第十届海峡两岸气溶胶技术研讨会

作者：丁爱军符淙斌杨修群孙鉴泞聂玮谢郁宁齐西蒙 e.herrmann T.Pet?j? V.-M.Kerminen M.Kulmala 南京大学气候与全球变化研究院/大气科学学院 Dept.of Physics University of Helsinki

南京大学气候与全球变化研究院与芬兰赫尔辛基大学合作于2009年起在南京大学仙林校区建立和发展了地球系统区域过程观测试验基地(SORPeS),该基地致力于研究地表物理过程、大气化学-气候相互作用、生态系统-大气相互作用和水文过程及水... 详细信息

南京大学气候与全球变化研究院与芬兰赫尔辛基大学合作于2009年起在南京大学仙林校区建立和发展了地球系统区域过程观测试验基地(SORPeS),该基地致力于研究地表物理过程、大气化学-气候相互作用、生态系统-大气相互作用和水文过程及水循环。站点位于南京东郊、长三角西部的下风向区域背景地区,具有很好的区域代表性。通过近2年的连续观测,本研究获得了长三角西部地区臭氧和细颗粒物PM2.5及其相关前体物的季节变化特征,发现了该地区臭氧、细颗粒污染的重要控制因子、天气过程及区域相互影响。本研究还发现在长三角地区高污染环境下也能出现频繁的新粒子生成事件,并提出了区别于国外清洁环境的主要限制因子。研究同时发现该地区不同类型来源的高浓度颗粒物污染会实质性的改变天气乃至区域气候。2012年6.10观测到的秸秆燃烧引起的高浓度气溶胶污染会导致天气预报对气温的严重高估和降水的"误报",多种计算机模型均不能重现该极端污染天气条件下的实际气温和降水分布。秸秆燃烧烟羽与城市及区域人为污染的混合,进而通过复杂的大气边界层-污染-云和辐射的正反馈机制影响大气结构以及降水。基于此,课题组将于2013/14两年在生物质燃烧的多发季节在SOePeS站点进行两期加强观测,针对此问题进行进一步研究。

关键词： SORPeS观测基地区域代表性生物质燃烧反馈机制新粒子生成

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国际医学放射学杂志 2014年第1期 87-87页

作者： J.Nierhoff A.A.C.Ortiz e.herrmann S.Zeuzem M.Friedrich-Rust 宋振虎 Institute of Biostatistics and Mathematical Modelling Faculty of Medicine J.W.Goethe University Theodor-Stern-Kai 7 60590 Frankfurt am Main Germany

目的声辐射脉冲(ARFI)是基于超声弹性成像的方法之一,可集成于常规超声设备中。本研究对已发表的有关原创论文和摘要进行Meta分析以评估ARFI在肝脏纤维

关键词： ARFI 弹力成像纤维化期肝活检肝脏硬度

Almost nonnegative curvature operator and cohomology rings

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Frontiers of Mathematics in China 2016年第5期11卷 1259-1274页

作者： Martin herrmann Fakultat fur Mathematik Karlsruher Institut fur Technologie Kaiserstraβe 89-93 76133 Karlsruhe Germany

We give a survey of results on the construction of and obstructions to metrics of almost nonnegative curvature operator on closed manifolds and results on the cohomology rings of closed, simply-connected manifolds with a lower curvature and upper diameter bound. The latter is motivated by a question of Grove whether these condition imply finiteness of rational homotopy types. This question has answers by F. Fang-X. Rong, B. Totaro and recently A. Dessai and the present author.

关键词： Nonnegative curvature homogeneous spaces curvature operator almost nonnegative curvature

Calculating pH-dependent free energy of proteins by using Monte Carlo protonation probabilities of ionizable residues

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Protein & Cell 2012年第3期3卷 230-238页

作者： Qiang Huang Andreas herrmann State Key Laboratory of Genetic engineering School of Life SciencesFudan UniversityShanghai 200433China Department of Biology Molecular BiophysicsHumboldt University of Berlin10115 BerlinGermany

Protein folding,stability,and function are usually in-fluenced by *** free energy plays a fundamental role in analysis of such pH-dependent ***-trostatics-based theoretical framework using dielectric solvent continuum model and solving Poisson-Boltzm-ann equation numerically has been shown to be very successful in understanding the pH-dependent ***,in this approach the exact computation of pH-dependent free energy becomes impractical for proteins possessing more than several tens of ioni-zable sites(e.g.>30),because exact evaluation of the partition function requires a summation over a vast number of possible protonation *** we present a method which computes the free energy us-ing the average energy and the protonation probabili-ties of ionizable sites obtained by the well-established Monte Carlo sampling *** key feature is to calculate the entropy by using the protonation *** used this method to examine a well-studied protein(lysozyme)and produced results which agree very well with the exact *** to the optimum pH of maximal stability of proteins and pro-tein-DNA interactions have also resulted in good agreement with experimental *** examples recommend our method for application to the elucidation of the pH-dependent properties of proteins.

关键词： protein protonation protein electrostatics pH-dependent free energy Poisson-Boltzmann equation Monte Carlo simulation

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