15 resultados para Anniversary

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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2006年12月1日是国际著名的力学家、应用数学家谈镐生院士诞辰九十周年纪念日.为纪念谈先生在力学学科的卓越贡献,缅怀他对推动我国力学基础研究和培养科技人才所作出的杰出贡献,中科院力学所于这天上午在所礼堂隆重举行“纪念谈镐生先生诞辰九十周年暨基础力学学术会议”.会前举行了《谈镐生先生文集》首发式,该文集由胡文瑞院士主持编辑,科学出版社出版,收录了谈镐生先生在流体力学、稀薄气体动力学和应用数学研究领域的论文和研究报告26篇,谈先生倡导和推行力学基础研究的有关文章和论述21篇,谈先生的学术活动和生活图片多幅,简介了谈先生生平.

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在庆祝我的同事和朋友钱学森所创立的力学研究所成立50周年之际,我很荣幸能在此讲几句话。当然,我未能与你们中的多数人一样,在力学所成立初期,参加你们的工作.你们的这段经历令我羡慕不已但是另一方面,在钱学森回国之前,在他计划为新中国的科学和技术的发展做出贡献的时候,我就在他的身边,正是这一时期孕育了他的这些想法。

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1955年,钱学森冲破重重阻挠回到祖国,并与钱伟长等一道创建了中国科学院力学研究所。2005年12月6日,我所召开“庆祝中国科学院力学研究所建所50周年暨钱学森同国50周年大会”,中国科学院副院长曹健林、两弹一星功勋奖章获得者陈能宽院士、钱学森的学术秘书涂季同志、钱学森的儿子钱永刚、女儿钱永真、国防科工委、总装备部、中国工程物理研究院、中国海洋石油总公司、国家自然科学基金委、兄弟院所和高校的有关领导和专家学者以及力学所职工共计300余人出席了大会,路甬祥院长、白春礼常务副院长、原国务委员、中国科学院原党组书记张劲夫同志为力学所建所50年和钱老回国50年题词。

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Directional emission triangle and square InGaAsP/InP lasers have been fabricated by standard photolithography, inductively coupled plasma etching technique combined with wet chemical etching process. In this article, the characteristics of the microcavity lasers are presented. For an equilateral triangle microcavity laser with the side length of 30 mu m, we got the laser spectra fitted very well with the mode wavelength formulate LIP to the 8(th) transverse mode at room temperature. But the laser spectra are usually more complex than the formulae for the lasers, especially for the lasers with a smaller side length. For a square microcavity laser with side length of 20 mu m, we observed the mode competition between the Fabry-Perot (FP) modes and Whispering-Gallery (WG) modes at 200K. The output spectra below the threshold have the mode interval of FP modes with a large mode interval, and the laser spectra agree very well with the WG modes, which have mode interval less than the FP modes. The output spectra are dominated by the FP modes below the threshold, because the FP modes have a higher output coupling efficiency than the WG modes.

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