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Petrology,geochronology,and geophysical characterization of Mesoproterozoic rocks in central Illinois,USA

Geoscience Frontiers 2020年第2期11卷 581-596页

作者： jared t.freiburg John HMcBride David HMalone Hannes ELeetaru Illinois State Geological Survey Prairie Research InstituteUniversity of Illinois at Urbana-Champaign615 E.Peabody DriveChampaignIL 61820USA University of Greifswald Institute of Geography and GeologyFriedrich-Ludwig-Jahn Str.17aD-17489 GreifswaldGermany Department of Geological Sciences Brigham Young UniversityProvoUT84602USA Department of Geography Geologyand the EnvironmentCampus Box 4400Illinois State UniversityNormalIL61790-4400USA

the Precambrian basement rocks of the Eastern Granite-Rhyolite Province(EGRP)in central Illinois(midcontinent region of North America)exhibit a complex history of early volcanism,granite emplacement,and intrusion of mafic rocks.A comprehensive suite of dedicated petrographic analyses,geophysical logs,and drill core from four basement-penetrating wells,two-dimensional and three-dimensional seismic reflection data,and U-Pb age data from the Illinois Basin–Decatur Project(IBDP)and Illinois Carbon Capture Storage(ICCS)Project site provide new constraints for interpreting the Precambrian basement of the Illinois *** new data reveal the basement to be compositionally and structurally complex,having typical EGRP felsic volcanic rocks intruded by the first reported gabbro in the Precambrian basement in ***(n?29)from rhyolite give a U-Pb weighted mean average age of 14679 ***(n?3)from a gabbro dike that intrudes the rhyolite yield a concordia age of 107312 Ma,which corresponds to Grenville-age extension and represents the first Grenville-age rock in Illinois and in the EGRP.A high-resolution three-dimensional seismic reflection volume,coincident with the four wells,provides a context for interpreting the petrological data and implies a high degree of heterogeneity for basement rocks at the IBDP–ICCS site,as also shown by the drill *** occurrence of Grenville-age gabbro is related to a prominent bowl-like structure observed on local two-dimensional seismic reflection profiles and the three-dimensional volume that is interpreted as a deep-seated mafic sill ***,heterogeneities such as the brecciated EGRP rhyolite and later gabbro intrusion observed in the basement lithology at the IBDP–ICCS may reflect previously unknown distal elements of the 1.1 Ga Midcontinent Rift in the EGRP and more likely Grenville-age extension.

关键词： Eastern granite-rhyolite province Mesoproterozoic Carbon storage Reflection seismology Zircon U-Pb geochronology Illinois

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On a Problem of the Goldbach-Waring type

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Acta Mathematica Sinica,English Series 1998年第2期14卷 223-234页

作者： Claus Bauer (Mathematisches Institut,Universitt.freiburg,Albertstrasse 23b,79104 freiburg,Germany) Universitat.freiburg 德国

Let E（X）=[{N≤X;N≠p12+p23+p34+p45 for any primes pi}|.It is proved in this paper that there exists a positive constant δ>0 such that E（X）《δX1-δ which improves a result of prachar.

关键词： Goldbach-Waring problem Exponential sum Exceptional zero

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Development and Application of Micromechanical Models for Ductile Fracture

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金属热处理学报 1997年第3期 67-74页

作者：孙东志

材料微观力学模型可应用于研究各种不同材料，如结构钢，中子辐照脆化焊接材料，球墨铸铁和铝合金等的韧性断裂。因为这些模型是依据韧性断裂微观机制的物理描述而建立起来的，所以其应用不受特定负荷条件和试样（或零部件）几何形状的... 详细信息

材料微观力学模型可应用于研究各种不同材料，如结构钢，中子辐照脆化焊接材料，球墨铸铁和铝合金等的韧性断裂。因为这些模型是依据韧性断裂微观机制的物理描述而建立起来的，所以其应用不受特定负荷条件和试样（或零部件）几何形状的限制。与Ｊ积分的概念不同，微观力学模型可以用来估算如铁素体和奥氏体这样在融合线上性能变化梯度很大的材料界面上的裂纹萌生和传播行为。本文提出了一种结合试验数据和计算模拟确定微观力学参数的方法，并演示了应用微观力学模型预测实际构件整体性能和断裂行为的可能性。

关键词：微观力学模型韧性断裂性能预测

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Visualization and quantification of water movement in porous cement-based materials by real time thermal neutron radiography:theoretical analysis and experimental study

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Science China(technological Sciences) 2010年第5期53卷 1198-1207页

作者： ZHANG Peng1,WIttMANN F H1,2,ZHAO tieJun1,LEHMANN E3 & JIN ZuQuan1 1 Center for Durability & Sustainability Studies of Shandong Province,Qingdao technological University,Qingdao 266033,China 2 Aedificat Institute freiburg,freiburg D-79100,Germany 3 Department of Spallation Neutron Source(ASQ),Paul Scherrer Institute,Villigen PSI CH-5232,Switzerland Center for Durability & Sustainability Studies of Shandong Province Qingdao Technological University Qingdao China Aedificat Institute freiburg Freiburg Germany Department of Spallation Neutron Source (ASQ) Paul Scherrer Institute Villigen PSI Switzerland

Water movement in porous cement-based materials is of great importance when studying their deterioration processes and *** traditional methods based on mass changes,electricity or nuclear magnetic resonances are available for studying water transport in cement-based *** this research,an advanced technique *** neutron radiography was utilized to achieve visualization and quantification of time dependent water movement including water penetration and moisture vapor in porous cement-based materials through theoretical analysis and experimental *** thermal neutrons ex-perience a strong attenuation by hydrogen,neutron radiography exhibits high sensitivity to small amounts of water.A neutron transmission analysis for quantitative evaluation of raw radiographic measurements was developed and optimized based on point scattered functions(PScF).the determinations of the real time and space dependent water penetration into uncracked and cracked mortar samples,as well as the drying process have been presented in this *** is illustrated that thermal neutron radiography can be a useful research tool for visualization and quantification of water movement in porous building *** obtained results will help us to better understand deteriorating processes of cement-based materials and to find ways to improve their durability.

关键词： thermal neutron radiography visualization quantification water penetration moisture diffusion cement-based materials

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tHE ROLE OF FIRE IN FORESt DYNAMICS IN DAXINGANLING REGION

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Journal of Forestry Research 1990年 36-41页

作者： JOHANN G. GOLDAMMERfreiburg University, freiburg F.R. GermanyDi XueyingNortheast Forestry University, Harbin 150040, P.R. China

Recent fire statisties and preliminary fire history data suggest that fire has beenhistorically responsible for maintaining the vegetative communities up to present In Daxinganling re-gion. Forest types,and even tree species,are dependent on the degree of fire intensity,fire size,depthof burn and fire *** samples of larch,birch and spruce forest were studied interms of speeies composition as determined by fire frequency which mainly depends on toporgraphyand site conditions .Intervals between fires range between 6 and 170 years.

关键词： FIRE ECOLOGY FIRE HIStORY FIRE REGIMES DAXINGANLING NORtHEAStERN CHINA

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铁钴三核原子簇氢化物HFe2Co(CO)9PR和HFe2Co(CO)9Se的合成

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化学学报 1985年第1期43卷 30-34页

作者：刘树堂 Honrath,U. 弗赖堡大学化学系西德弗赖堡内蒙古大学化学系

Co(CO)PR(R=NEt,t-Bu,Ph)与Na[Fe(CO)]在tHF中反应,合成了以有机膦作μ-配位体的新型铁钴三核原子簇羰基氢化物HFeCo(CO)PR.又用高压法合成FeCO(CO)Se,它与Na[Fe(CO)]在tHF中反应,得到另一个以硒作μ3-配位体的新型铁钴三核原子簇羰基... 详细信息

Co(CO)PR(R=NEt,t-Bu,Ph)与Na[Fe(CO)]在tHF中反应,合成了以有机膦作μ-配位体的新型铁钴三核原子簇羰基氢化物HFeCo(CO)PR.又用高压法合成FeCO(CO)Se,它与Na[Fe(CO)]在tHF中反应,得到另一个以硒作μ3-配位体的新型铁钴三核原子簇羰基氢化物HFeCo(CO)Se.上述合成的原子簇化合物在极性溶剂中按酸式电离成一价阴离子,再与(PPN)Cl反应生成[FeCo(CO)PPh](PPN),[FeCo(CO)PBu-t](PPN)和[FeCo(CO)Se](PPN)盐.

关键词：氢化物 HFe2Co 氢化合物溶剂针状晶体 CO 原子簇 PR

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On invariant sets in Lagrangian graphs

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Science China Mathematics 2010年第12期53卷 3095-3098页

作者： CUI XiaoJun 1,2, & ZHAO Lei 3,4 1 Department of Mathematics, Nanjing University, Nanjing 210093, China 2 Mathematisches Institut, Albert-Ludwigs-Universita¨t, freiburg im Breisgau 79104, Germany 3 ASD, IMCCE, Paris Observatory, Paris 75014, France 4 Department of Mathematics, Paris 7 University, Paris 75013, France Department of Mathematics Nanjing University Nanjing China Mathematisches Institut Albert-Ludwigs-Universität Freiburg im Breisgau Germany ASD IMCCE Paris Observatory Paris France Department of Mathematics Paris 7 University Paris France

In this exposition, we show that the Hamiltonian is always constant on a compact invariant connected subset which lies in a Lagrangian graph provided that the Hamiltonian and the graph are sufficiently smooth. We also provide some counterexamples to show that if the Hamiltonian function is not smooth enough, then it may be non-constant on a compact invariant connected subset which lies in a Lagrangian graph.

关键词： Lagrangian graph invariant set critical value

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miniSCIDOM: a scintillator-based tomograph for volumetric dose reconstruction of single laser-driven proton bunches

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High Power Laser Science and Engineering 2024年第2期12卷 41-50页

作者： A.Corvino M.Reimold E.Beyreuther F.-E.Brack F.Kroll J.Pawelke J.D.Schilz M.Schneider U.Schramm M.E.P.Umlandt K.Zeil t.Ziegler J.Metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany technische Universität Dresden DresdenGermany OncoRay–National Center for Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current affiliation:Institut Curie UniversitéPSLCNRS UMR3347OrsayFrance Current affiliation:Universitätsklinikum freiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of intense and short proton bunches on a micrometre scale,thus offering new experimental capabilities to research fields such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow for tailored volumetric dose deposition in a sample via single bunches to excite or probe specific sample *** rising number of such experiments indicates a need for diagnostics providing spatially resolved characterization of dose distributions with volumes of approximately 1 cm^(3) for single proton bunches to allow for fast online *** we present the scintillator-based miniSCIDOM detector for online single-bunch tomographic reconstruction of dose distributions in volumes of up to approximately 1 cm^(3).the detector achieves a spatial resolution below 500μm and a sensitivity of 100 *** detector performance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary focus is the characterization of the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate

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Comments on the paper: "Dispersion Calculation of Monomode Step-Index Weakly Guiding Fibers" by C. C. Fan et al.,Acta Electronica Sinica, Vol.10, No.1,pp. 8-15, Jan.1982

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电子学报 1983年第4期 111-112页

作者： B.P.PAL* and R.th.KERStENFraunhofer-Institut fur Physikalische Messtechnik, Heidenhofstrasse 8, D-7800 freiburg, Federal Republic of Germany

In the above publication dispersion calculations have been made for monomode step-index weakly guiding optical fibers. However, as explained below the approach followed in it was. approximate and therefore the conclusions drawn therefrom as regards the accuracy of the two sets of given approximate empirical formulas for prediction of zero dispersion wave-length was. not correct.

关键词： Dispersion Calculation of Monomode Step-Index Weakly Guiding Fibers Fan et al Acta Electronica Sinica by C

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欧洲几个协调测试中心的太阳模拟器标定

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控制工程（北京） 1999年第4期 32-37页

作者： W.Ley E.Plescher A.freiburg N.Nikolaizig A.Popovitch 郑克隆

欧洲一些测试中心,如EStEC(欧洲空间技术中心,荷兰)、IABG(工业设备管理中心,德国)和INtESPACE(空间环境工程试验中心,法国)采用不同方法描述太阳模拟器特性。本文对这些方法进行比较与评定,对总辐照度与光束均匀度的各种测量方法进行验... 详细信息

欧洲一些测试中心,如EStEC(欧洲空间技术中心,荷兰)、IABG(工业设备管理中心,德国)和INtESPACE(空间环境工程试验中心,法国)采用不同方法描述太阳模拟器特性。本文对这些方法进行比较与评定,对总辐照度与光束均匀度的各种测量方法进行验证,保证用户采用相同的标准对测试数据进行评估与解释。为了在太阳模拟器性能测量中能够采用适当的术语,对有关国际标准进行了调查,并将它们汇编成一个文件,以便在总辐照度和光束均匀度测量中使用。业已确定了一种国际标准作为绝对总辐照度的顶级参考标准,所有工作标准都对照它来标定。本文汇总了这几个测试中心描述太阳模拟器热特性的方法,对比了这些测试方法所采用的结构、试验体积和性能参数。讨论了测量与控制总辐照度参数的不同方法以及手动控制系统和闭环控制系统。就光束均匀度测量而言,这些测试中心采用了两种不同原理的扫描方法,即笛卡尔坐标法与极坐标法。为了比较现有的均匀度曲线,必须考虑数据采集、转换与处理的方法。因此,根据采集的三维综合数据集用计算机仿真来对不同方法进行分析评估。本文给出的结果可对光束均匀度进行比较,且数据评估对用户透明。结果概括在一个太阳模拟器标定程序之中。考虑到不同测试中心使用的设备与仪器各不相同,这份文件只涵盖这些协调测试中心测量总辐照度与光束均匀度的最起码的通用要求。

关键词：欧洲测试中心太阳辐射太阳模拟器标定

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