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自1953年科威特投资委员会成立至今,主权财富基金已经有超过半个世纪的发展,特别在近些年其发展速度突然加快,目前全球市值估计已经超过3万亿美元,作为国际金融体系中一股新兴而又强大的投资力量,其行为受到人们的关注.目前主权财富基金或者采用自己管理或者采用委托管理的方式,无论哪种方式,相信人们都会对其投资战略、资产配置及投资绩效的情况很感兴趣,文章就结合世界上五个主要的主权财富基金加以分析并提出一些建设性的结论与建议. 相似文献
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This paper is aimed to propose an approach to predict the dynamic characteristics of ring-plate planetary indexing cam mechanism,
which is a novel type of indexing mechanism that employs internal planetary transmission structure. Firstly, the geometry
and structure of the mechanism are discussed and the kinematic practicability is simulated with virtual prototype design.
Then a 3D finite element model of the ring-plate planetary indexing cam mechanism is developed with the commercial software
of MATLAB and ANSYS. Through the finite element analysis, the natural frequencies and the corresponding mode shapes are predicted
in one motion cycle. On the basis of the virtual prototype design and finite element analysis, an experimental prototype is
made and tested to validate the prediction of the dynamic characteristics. The agreement between experimental results and
the finite element analysis testifies that the finite element model developed is applicable to the prediction of the dynamic
characteristics of this type of mechanism. 相似文献
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基于创新能力培养的工程图学自主创作实践 总被引：7，自引：0，他引：7
在调整课程体系，精练教学内容的基础上，进行自主设计实践，激发和培养创新能力，从而提高综合素质，全面推进图学素质教育。 相似文献
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