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Sensitivity of precipitation statistics to urban growth in a subtropical coastal megacity cluster

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Journal of Environmental Sciences 2017年第9期29卷 6-12页

作者： Christopher claus Holst Johnny C.l.Chan Chi-Yung Tam School of Energy and Enuironment City Uniuersity of liong KongHong KongChina Guy Carpenter Asia-Pacific Climate Impact Centre City Uniuersity of Hong KongHong KongChina Earth System Science Programme The Chinese Uniuersity of Hong KongHong KongChina

This short paper presents an investigation on how human activities may or may not affect precipitation based on numerical simulations of precipitation in a benchmark case with modified lower boundary conditions, representing different stages of urban development in the model. The results indicate that certain degrees of urbanization affect the likelihood of heavy precipitation significantly, while less urbanized or smaller cities are much less prone to these effects. Such a result can be explained based on our previous work where the sensitivity of precipitation statistics to surface anthropogenic heat sources lies in the generation of buoyancy and turbulence in the planetary boundary layer and dissipation through triggering of convection. Thus only mega cities of sufficient size, and hence human-activity-related anthropogenic heat emission, can expect to experience such effects. In other words, as cities grow, their effects upon precipitation appear to grow as well.

关键词： Urban precipitation Micro climate sensitivity Urbanization

Optimal choice of Reed-Solomon codes to protect against queuing losses in wireless networks

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The Journal of China Universities of Posts and Telecommunications 2009年第3期16卷 71-83页

作者： claus Bauer Dolby laboratories 100 Potrero Avenue San Francisco

This article proposes algorithms to determine an optimal choice of the Reed-Solomon forward error correction （FEC） code parameters （n,k） to mitigate the effects of packet loss on multimedia traffic caused by buffer overflow at a wireless base station. A network model is developed that takes into account traffic arrival rates, channel loss characteristics, the capacity of the buffer at the base station, and FEC parameters. For Poisson distributed traffic, the theory of recurrent linear equations is applied to develop a new closed form solution of low complexity of the Markov model for the buffer occupancy. For constant bit rate （CBR） traffic, an iterative procedure is developed to compute the packet loss probabilities after FEC recovery.

关键词： FEC packet loss buffer occupancy Markov model

单航天器激光天文动力学空间计划（ASTROD Ⅰ）

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单航天器激光天文动力学空间计划（ASTROD Ⅰ）

Sums of Five Almost Equal Prime Squares

中国宇航学会深空探测技术专业委员会第一届学术会议

作者：严俊倪维斗李广宇陶金河马月华包纲夏炎柳磊赵海斌潮见幸江包芸黄超光黄天衣罗俊周泽兵汤俊雄聂玉昕魏志义王海涛吴季吴雪君须重明熊耀恒张书练张杨张元仲叶贤基 Hansjrg Dittus claus lmmerzahl Jean Franois Mangin Achim Peters Albrecht Rüdiger tienne Samain Stephan Schiller Diana Shaul Timothy Sumner Pierre Touboul Andreas Wicht 中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台中国科学院紫金山天文台清华大学物理系中山大学力学系中国科学院高能物理研究所南京大学天文系华中科技大学物理系华中科技大学物理系北京大学电子学系中国科学院物理研究所中国科学院物理研究所南京航空航天大学测量与控制工程系中国科学院空间科学与应用中心南京师范大学物理系南京师范大学物理系中国科学院国家天文台云南天文台清华大学精密仪器系中国科技大学天文与应用物理系中国科学院理论物理研究所南洋科技大学制造工程学院 Center for Applied Space Technology and Microgravity Univ.of BremenGermany Center for Applied Space Technology and Microgravity Univ.of BremenGermany CERGA Observatoire de la Cote D’AzurGrasseFrance Department of Experimental Physics University of BerlinBerlinGermany Max-Planck-Institut für Gravitationsphysik GrchingGermany CERGA Observatoire de la Cote D’AzurGrasseFrance Department of Exp.Physics University of DüsseldorfDüsseldorfGermany Imperial College LondonUK Imperial College LondonUK ONERA Chatillon CedexFrance Department of Exp.Physics University of DüsseldorfDüsseldorfGermany

单航天器激光天文动力学空间计划（ASTROD I）是激光天文动力学空间计划（ASTROD: Astrodynamical Space Test of Relativity using Optical Devices）的第一步。ASTROD I空间计划概念是:使用一个在太阳轨道上的无拖曳航天器与地面站以... 详细信息

单航天器激光天文动力学空间计划（ASTROD I）是激光天文动力学空间计划（ASTROD: Astrodynamical Space Test of Relativity using Optical Devices）的第一步。ASTROD I空间计划概念是:使用一个在太阳轨道上的无拖曳航天器与地面站以双向激光干涉跟踪和脉冲计时测距的方法,精确地探讨天文动力学,检测相对论与时空基本定律,改进棵测引力波的灵敏度以及更准确地测定太阳、行星和小行星的参数。ASTROD I在天文动力学和检测相对论与时空基本定律方面, 精确度将比现在提高3个数量级;在测定太阳、行星和小行星参数方面,精确度将比现在提高1 -3个数量级。ASTROD I对引力波的探测灵敏度,也可以比现在的射电波追踪航天器的探测方法稍作提高。航天器可由长征四号乙（CZ-4B）运载火箭发射,从低绕地转移轨道直接进入绕日轨道,经由金星引力助推两次,于发射后三百七十天抵达太阳对面从事相对论Shapiro效应测量。乐观的发射日期可在2012年、2013年或2015年。单航天器激光天文动力学空间计划的推动,可以对重要关键技术如无拖曳航天、弱光锁相、空间光通讯等的发展起到带头作用。本计划正在进行第一阶段顸研究,主要由中国和欧洲的德国、英国和法国科学家合作进行。

关键词：天文动力学空间计划激光测距相对论检测太阳系测量

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Acta Mathematica Sinica,English Series 2005年第4期21卷 833-840页

作者： claus BAUER Dolby laboratories 100 Potrero AvenueSan FranciscoCA94103USA

let Pi, 1≤i≤5, be prime numbers. It is proved that every integer N that satisfies N=5 （mod 24） can be written as N=p1^2＋p2^2＋P3^2＋p4^2 ＋p5^2, where │√N5-Pi│≤N^1/2-19/850＋∈.

关键词： Prime numbers Exponential sums l-functions

large sieve inequality with sparse sets of moduli applied to Goldbach conjecture

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Frontiers of Mathematics in China 2017年第2期12卷 261-280页

作者： claus BAUER Dolby laboratories Beijing 100020 China

We use the large sieve inequality with sparse sets of moduli to prove a new estimate for exponential sums over primes. Subsequently, we apply this estimate to establish new results on the binary Goldbach problem where... 详细信息

关键词： Three primes theorem exponential sums over primes sparse set ofmodules

The Short local Algebras of Dimension 6 with Non-projective Reflexive Modules

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Communications in Mathematics and Statistics 2023年第2期11卷 195-227页

作者： claus Michael Ringel Fakultät für Mathematik Universität BielefeldPO Box 10013133501 BielefeldGermany

let A be a finite-dimensional local algebra over an algebraically closed field,let J be the radical of *** modules we are interested in are the finitely generated left *** are always reflexive,and an algebra is self-injective iff allmodules are *** discuss the existence of non-projective reflexive modules in case A is not *** assume that A is short(this means that J^(3)=0).In a joint paper with Zhang Pu,it has been shown that 6 is the smallest possible dimension of A that can occur and that in this case the following conditions have to be satisfied:J^(2)is both the left socle and the right socle of A and there is no uniform ideal of length *** present paper is devoted to showing the converse.

关键词： Short local algebra Reflexive module Gorenstein-projective module Bristle Atom Bar Bristle-bar layout

Determination of sex by jasmonate^FA

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Journal of Integrative Plant Biology 2020年第2期62卷 162-164页

作者： claus Wasternack Department of Molecular Signal Processing Leibniz Institute of Plant BiochemistryHalle(Saale)D‐06120Germany laboratory of Growth Regulators Institute of Experimental Botany AS CR&Palacky UniversityOlomoucCZ‐78371Czech Republic

Jasmonic acid (JA) and some of its derivatives are important signals in plant stress responses such as biotic or abiotic stresses during alteration of the environment and are signals in several developmental processes such as trichome development, growth/defense balance, root growth, senescence, or light signaling (Wasternack and Hause 2013).

关键词： Determination sex jasmonate

Chronic hepatitis B in 2014: Great therapeutic progress, large diagnostic deficit

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World Journal of Gastroenterology 2014年第33期20卷 11595-11617页

作者： claus Niederau Katholisches Klinikum Oberhausen GmbH St. Josef Hospital Klinik für Innere Medizin Akademisches Lehr-krankenhaus der Universit?t Duisburg-Essen 46045 Oberhausen Germany

This review analyzes progress and limitations of diagnosis, screening, and therapy of patients with chronic hepatitis B infection. A literature review was carried out by framing the study questions. Vaccination in early childhood has been introduced in most countries and reduces the infection rate. Treatment of chronic hepatitis B can control viral replication in most patients today. It reduces risks for progression and may reverse liver fibrosis. The treatment effect on development of hepatocellular carcinoma is less pronounced when cirrhosis is already present. Despite the success of vaccination and therapy chronic hepatitis B remains a problem since many infected patients do not know of their disease. Although all guidelines recommend screening in high risk groups such as migrants, these suggestions have not been implemented. In addition, the performance of hepatocellular cancer surveillance under real-life conditions is poor. The majority of people with chronic hepatitis B live in resource-constrained settings where effective drugs are not available. Despite the success of vaccination and therapy chronic hepatitis B infection remains a major problem since many patients do not know of their disease. The problems in diagnosis andscreening may be overcome by raising awareness, promoting partnerships, and mobilizing resources.

关键词： Chronic hepatitis B HBsAg Screening liv-er cirrhosis Hepatocellular cancer Entecavir Tenofovi Telbivudine Adefovir lamivudine Interferon

Representation theory of Dynkin quivers. Three contributions

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Frontiers of Mathematics in China 2016年第4期11卷 765-814页

作者： claus Michael RINGEl Fakultat fiir Mathematik Universitat Bielefeld P. O. Box 100 131 D-33501 Bielefeld Germany Department of Mathematics Shanghai Jiao Tong University Shanghai 200240 China

The representations of the Dynkin quivers and the corresponding Euclidean quivers are treated in many books. These notes provide three building blocks for dealing with representations of Dynkin （and Euclidean） quivers. They should be helpful as part of a direct approach to study representations of quivers, and they shed some new light on properties of Dynkin and Euclidean quivers.

关键词： Quiver Dynkin quiver Euclidean quiver the exceptional vertices of a Dynkin quiver representations of quivers thin representations filtrations of vector spaces conical representations of star quivers Auslander- Reiten quiver thick subcategories perpendicular subcategories one-point extension antichains of a poset antichains of an additive category simplifi- cation hammocks the 2-4-8 property the magic Freudenthal-Tits square