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军界谈不明飞行物

军界谈不明飞行物

RESEARcH ON THE EVALUATION METHOD OF FRIcTION AND LUBRIcATION IN DEEP DRAWING

作者：让-克洛德·布雷(j.c. Bourret)

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 439-445页

作者： D.N.He X.F.Yin H.Z.Thao D.Lv X.Y.Ruan j.L.cheng j.Y.jiang Shanghai jiao Tong University National Die&Mold CAD E.R.CShanghai 200030China Shanghai Vopkswagen Automotive company Ltd. Shanghai 201805China

The deformation characteristic of bland in deep drawing is discussed. It is pointed out that the friction and lubrication conditions in for drawing are different from that in mechanical motion or machine work or other plastic process. The common test methods in laboratories are analyzed. It shows that though all those test methods can test the friction coefficient, the probe test method is most suitable for the research of friction and lubrication and the process in deep drawing, for this method is identical with the actual work condition either from the test principle or deformation status of the blank. Last the successful application in the deep drawing simulator newly developed the the probe method are intro- duced in detail.

关键词： deep drawing probe test method friction and lubrication evaluation method

不同硫化程度的NR/BR共混胶的动态力学性能

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橡胶参考资料 1996年第3期26卷 41-46页

作者： c.L.Matteo j.j.Gonzalez j.G.Tischler 葛宁

在科学技术应用中使用弹性体共混胶对改善力学性能、提高使用寿命和使成本最优化是很有意义的。特别是在轮胎中使用NR、BR和SBR共混胶可降低胎面的滚动阻力。因此有必要对这些胶料的动态性能做出详尽的描述。

关键词：天然橡胶聚丁二烯橡胶共混胶硫化力学性能

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维普期刊数据库

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超级漫画素描技法.1,基础入门篇

contribution to the understanding of the performance differences between commercial current collectors in Li–S batteries

2012年

作者： c·c动漫社

本书是一本漫画技法书，是超级漫画素描技法升级版系列的第一本，讲解了漫画技法中的基础绘画知识。本书重点围绕漫画人物的基础画法进行探讨，从人物头部的绘制开始，到身体的绘制技巧。再到表情动作、服装道具，为读者展开一次漫画人... 详细信息

ISBN: (纸本)9787515303949

本书是一本漫画技法书，是超级漫画素描技法升级版系列的第一本，讲解了漫画技法中的基础绘画知识。本书重点围绕漫画人物的基础画法进行探讨，从人物头部的绘制开始，到身体的绘制技巧。再到表情动作、服装道具，为读者展开一次漫画人物的设定之旅，并在第六章总结性地加入对角色设计实例的解读。在最后一章，进一步补充讲解角色上色的基本技巧，使读者在学习之后，能够独立地设计角色，完完整整地创作出自己理想的漫画人物。

关键词：漫画素描技法人物画技法

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journal of Energy chemistry 2021年第11期30卷 295-306,I0007页

作者： A.Benitez F.Luna-Lama Acaballero E.Rodriguez-castellon j.Morales Dpto.Química Inorgánica e Ingeniería Química Instituto Universitario de Nanoquímica(IUNAN)Universidad de Córdoba14071 CórdobaSpain Dpto.de Química Inorgánica Cristalografía y MineralogíaFacultad de CienciasUniversidad de Málaga29071 MálagaSpain

Lithium–sulfur batteries have been recognised as highly promising next-generation batteries, due to their low cost and high theoretical energy density. Despite numerous advances in this technology over the last decade, its commercialisation is still a challenge that has not yet been achieved. Many efforts have been made to improve the problems that these batteries present, mainly by investigating different cathode manufacturing strategies, testing novel Li anodes, new additives in the electrolytes, and modified separators or interlayers. However, the characteristics of the current collectors used in the preparation of the electrodes have been rarely addressed. Three commercial collectors are commonly used in basic research on Li–S batteries: Al foil, carbon coated Al foil (Al-c), and carbon paper (gas diffusion layer, GDL). In this work, a detailed study of the electrochemical response of these commercial collectors has been carried out. The tests were carried out on two S composites formed by carbons of a different natures, commercial carbon black and synthetic N-doped graphene. In addition, the S impregnation method was different, using either melt diffusion at 155 ℃ or ethylenediamine as S solvent, respectively. In both systems, the results were similar – the electrodes supported on GDL delivered higher specific capacities than those supported on Al and Al-c, with minimal differences between the two. Of the different collector properties examined to explain this behaviour, namely Al corrosion, electrical conductivities, surface-level composition, and surface texture, only the latter had a significant effect in the performance of GDL-based electrodes. SEM images revealed a rough and cracked surface formed by the agglomerated carbon particles that give rise to a complex pore system, predominantly consisting of macropores. All of these features are beneficial for a better anchoring of the active material on the collector surface, in addition to enhancing the wettabi

关键词： current collector carbon paper Aluminum foil Lithium–sulfur battery

An algorithm for preferential selection of spectroscopic targets in LEGUE

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Research in Astronomy and Astrophysics 2012年第7期12卷 755-771页

作者： jeffrey L. carlin Sebastien Lepine Heidi jo Newberg Li-cai Deng Timothy c. Beers Yu-Qin chen Norbert christlie Xiao-Ting Fu Shuang Gao carl j. Grillmair PuragraGuhathakurta Zhan-Wen Han jin-Liang Hou Hsu-Tai Lee jing Li chao Liu Xiao-Wei Liu Kai-Ke Pan j. A. Sellwood Hong-chi Wang Fan Yang Brian Yanny Yue-Yang Zhan Zheng Zheng Zi Zhu Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute 110 8th Street Troy NY 12180 USA carlij@rpi.edu Department of Astrophysics American Museum of Natural History Central Park West at 79thStreet New York NY 10024 USA city University of New York 365 Fifth Avenue New York NY 10016 USA National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China National Optical Astronomy Observatory Tucson AZ 85719 USA center for Astronomy University of Heidelberg Landesstemwarte Ktinigstuhl 12 D-69117Heidelberg Germany Spitzer Science center 1200 E. California Blvd. Pasadena CA 91125 USA jcO/Lick Observatory Department of Astronomy and Astrophysics University of CaliforniaSanta Cruz CA 95064 USA Yunnan Astronomical Observatory Chinese Academy of Sciences Kunming 650011 China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanglai 200030 China Institute of Astronomy and Astrophysics Academia Sinica EO. Box 23-141 Taipei 106 China Department of Astronomy & Kavli institute of Astronomy and Astrophysics Peking UniversityBeijing 100875 China Apache Point Observatory PO Box 59 Sunspot NM 88349 USA Department of Physics and Astronomy Rutgers University 136 Frelinghuysen RoadPiscataway NJ 08854-8019 USA Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China Fermi National Accelerator Laboratory EO. Box 500 Batavia IL 60510 USA Department of Physics and Astronomy University of Utah Salt Lake City UT 84112 USA Department of Astronomy Nanjing University Nanjing 210011 China

We describe a general target selection algorithm that is applicable to any survey in which the number of available candidates is much larger than the number of objects to be observed. This routine aims to achieve a balance between a smoothly- varying, well-understood selection function and the desire to preferentially select cer- tain types of targets. Some target-selection examples are shown that illustrate differentpossibilities of emphasis functions. Although it is generally applicable, the algorithm was developed specifically for the LAMOST Experiment for Galactic Understanding and Exploration （LEGUE） survey that will be carried out using the chinese Guo Shou jing Telescope. In particular, this algorithm was designed for the portion of LEGUE targeting the Galactic halo, in which we attempt to balance a variety of science goals that require stars at fainter magnitudes than can be completely sampled by LAMOST. This algorithm has been implemented for the halo portion of the LAMOST pilot sur- vey, which began in October 2011.

关键词： surveys: LAMOST -- Galaxy: halo -- techniques: spectroscopic

chromosome Based Strategies to Decipher the Structure and Evolution of the Hexaploid Wheat Genome:chromosome 3B,a case Study

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Chromosome Based Strategies to Decipher the Structure and Ev...

Introduction to business statistics : 5th ed.

第二届植物分子育种国际会议

作者： E.Paux P.Sourdille j.Salse P.Leroy j.Dolezel M.Bernard c.Feuillet Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France Laboratory of Molecular cytogenetics and cytometry IEBSokolovska 6OlomoucCZ-77200Czech Republic Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France Genetics and Plant Breeding UMR INRA-UBPDomaine de CrouelleClermont-Ferrand63100France

＜正＞With 17% of all crop area, wheat is the staple food for 40% of the world’s population. Improvement in bread wheat quality and yield in the context of sustainable agriculture is needed in the next decades to mee... 详细信息

关键词： Hexaploid wheat Physical map Sequencing Markers chromosome-specific library chromosome 3B Gene space Transposable elements BAc end sequences

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2000年

作者： Alan H. Kvanli Robert j. Pavur c. Stephen Guynes

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通讯医疗在灾害中的应用

通讯医疗在灾害中的应用