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一个2N体问题空间中心构型的存在性
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作者 刘文忠 刘梦 +1 位作者 孙艳春 张同杰 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第3期247-253,共7页
研究2 N体问题在单位球上的两层正多边形中心构型的存在性,根据对动力学运动方程的分析,得出否定的结论.本文还讨论了中心构型的数学定义,以及中心构型与梯度流的关系.
关键词 2N体问题 两层平面 中心构型 数学定义 存在性 梯度流
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N体问题4个中心构型的存在性
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作者 刘文忠 刘梦 +1 位作者 孙艳春 张同杰 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2014年第3期247-254,共8页
对于N体问题,研究了4个中心构型的存在性,根据对动力学运动方程的分析,得出否定的结论.本文还对其中的原因进行了分析.
关键词 N体问题 中心构型 数学定义 存在性 双金字塔中心构型
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Model, Methodology, and Forecast: Expert Data in Assessing Political Risk in Malaysia
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作者 Llewellyn D. Howell 《International Relations and Diplomacy》 2015年第4期229-264,共36页
This study is about Malaysia's investment environment. I've undertaken its writing in part as a reflection on my own involvement with Malaysia over more than halfa century (from Malaya in 1963). The study also bri... This study is about Malaysia's investment environment. I've undertaken its writing in part as a reflection on my own involvement with Malaysia over more than halfa century (from Malaya in 1963). The study also brings to bear a structure for analysis drawn from the field of political risk analysis. I have been involved with formal (corporate) political risk assessment since 1979 and bring that experience into the discussion that follows. I have published extensively on both Malaysia and political risk. Some of these publications are cited below. Political risk assessment depends on experts on the countries that they examine. 1 don't usually refer to myself as an "expert" but rather as a specialist. However, the common reference in political risk studies is to data generated by experts. In the paper below I discuss the nature of political risk assessment, Malaysia, my own credentials that have gotten me into the political risk business, and three political risk assessment methodologies, with the results for Malaysia for each. I give emphasis to the assessment that I have done using the Economist method, for reasons that I provide below. I was able to incorporate interviews of 35 professional subjects in Malaysia in February 2014 in which they were each able to rate Malaysia using the Economist method. They were drawn from government, business, journalism, and academe. I think the results are interesting, at least. 展开更多
关键词 MALAYSIA political risk expert data ISLAM POLITICS race ETHNICITY
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Jaguars, Dragons and Tigers
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作者 MARY B. TEAGARDEN 《China International Business》 2010年第1期46-47,共2页
Haier (海尔), Huawei (华为), Lenovo (联想), and TCL (多媒体科技控股有限公司), are not yet household names in the United States or Europe, but Chinese multinationals are making major inroads into markets which ... Haier (海尔), Huawei (华为), Lenovo (联想), and TCL (多媒体科技控股有限公司), are not yet household names in the United States or Europe, but Chinese multinationals are making major inroads into markets which were once the sole domain of companies like Westinghouse, Eriksson, IBM and RCA. 展开更多
关键词 美洲虎 IBM公司 跨国公司 多媒体 TCL RCA 海尔 华为
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