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复数,实数及实对称数据下Bruun FFT算法的实现 总被引:3,自引:0,他引:3
本文在复数、实数以及实对称数据下研究和实现了Bruun FFT算法。文章分析和评价了各种数据下BruunFFT的运算量和特点,提出了算法的实现结构和方法。最后给了TMS320C30上的运算时间,我们实现的算法比基2FFT速度提高35%。 相似文献
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西部农业信息化建设问题的探讨 总被引:3,自引:0,他引:3
西部农业信息化水平低下制约着西部农业的发展。物质基础薄弱、信息意识淡薄、信息人才及资金短缺是造成西部农业信息化水平低下的原因。为加快西部信息化农业建设,应该从更新观念、加大政府支持力度、利用有限资源进行信息化基础建设、重视人才资源的开发、培育信息产品市场、加强农业应用系统和信息化农业技术的研究、加强示范应用体系等方面入手。 相似文献
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Korevaar PA George SJ Markvoort AJ Smulders MM Hilbers PA Schenning AP De Greef TF Meijer EW 《Nature》2012,481(7382):492-496
Self-assembly provides an attractive route to functional organic materials, with properties and hence performance depending sensitively on the organization of the molecular building blocks. Molecular organization is a direct consequence of the pathways involved in the supramolecular assembly process, which is more amenable to detailed study when using one-dimensional systems. In the case of protein fibrils, formation and growth have been attributed to complex aggregation pathways that go beyond traditional concepts of homogeneous and secondary nucleation events. The self-assembly of synthetic supramolecular polymers has also been studied and even modulated, but our quantitative understanding of the processes involved remains limited. Here we report time-resolved observations of the formation of supramolecular polymers from π-conjugated oligomers. Our kinetic experiments show the presence of a kinetically favoured metastable assembly that forms quickly but then transforms into the thermodynamically favoured form. Quantitative insight into the kinetic experiments was obtained from kinetic model calculations, which revealed two parallel and competing pathways leading to assemblies with opposite helicity. These insights prompt us to use a chiral tartaric acid as an auxiliary to change the thermodynamic preference of the assembly process. We find that we can force aggregation completely down the kinetically favoured pathway so that, on removal of the auxiliary, we obtain only metastable assemblies. 相似文献
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潘江 《科技情报开发与经济》2004,14(6):9-10
引入研究型大学及其图书馆的定义,阐述了研究型大学图书馆进行人力资源管理的重要意义。进而提出了研究型大学图书馆人力资源管理的策略,包括改变人力资源管理理念,建立以人为本的人才管理机制,注重人才的使用和培养,充分调动馆员的积极性等。 相似文献
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庞晓青 《科技情报开发与经济》2004,14(6):250-251
人才是提高综合国力的关键要素。为用好人才,一是要辨证地把握好识别人才、起用人才的标准,既要选拔出德才兼备的人才,又不可求全责备;二是用人要讲究方法。做到公平竞争、择优录用、知人善用,同时鼓励人才合理流动;三是用人要遵循讲正气、讲民主、讲大度的原则,大胆使用人才。 相似文献
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