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由生物物理研究所主持,植物研究所参加完成的"菠菜主要捕光复合物的晶体结构"研究成果以Article的方式发表在2004年3月18日出版的Nature上,该晶体结构图被选作本期杂志的封面图案.本文介绍了该项成果的研究背景、意义、主要创新点及方法. 相似文献
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基于作者共引分析的推荐系统研究知识图谱构建 总被引:2,自引:0,他引:2
作者共引分析是文献研究中所采用的重要和有效方法。本文针对推荐系统领域的研究,用基于作者共引分析的方法构建知识图谱。利用Web of Science数据库作为数据来源,提取1997-2014年的推荐系统研究文章,生成作者共引矩阵后转化为Pearson相关系数矩阵,再进行因子分析、聚类分析与多维尺度分析,构建推荐系统研究领域的知识图谱。分析表明,推荐系统研究目前处于快速发展时期,相关学者人数与研究范围不断扩大,其中基于协同过滤的推荐算法是最为核心的研究内容,个性化推荐、基于内容的推荐算法和基于数据挖掘的推荐算法等方向是目前该领域的研究热点。 相似文献
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《中国科学院院刊(英文版)》2004,18(1):2-2
International cooperation is a prerequisite for the successful .implementation of the national Knowledge Innovation Program (KIP) being piloted by CAS, and hence further efforts will be made to strengthen collaboration and exchanges with the outside world,stresses CAS President Lu Yongxiang. 相似文献
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《中国科学院院刊(英文版)》2005,19(3):130-131
At the enlarged summer session of the Party's Leading Group at CAS held from July 25 to 29 in Beijing,the CAS leadership called for implementing the third-phase work of the Knowledge Innovation Program (KIP) through innovation and reform, so as to open up new prospects for CAS development in the years to come. 相似文献
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教师专业化经历了组织发展和专业发展两个阶段,在当前,教师专业发展已成为专业化的主流。而在我国,由于对教师专业发展内涵的模糊界定,导致专业发展陷入误区之中。教师专业发展的实现,是各方力量相互协调、相互支持的结果,它不仅需要教师自身不懈的努力,同时还需要来自社会、学校、学区等各方面的支持。 相似文献
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心-身问题的出路何在? 总被引:1,自引:0,他引:1
维之 《科学技术与辩证法》2007,24(5):22-25
心身关系研究仍面临着物质机制难以说明主观经验的困境,这主要由心物两界分立的传统观念所造成。只有革新物质观,心-身问题才能有真正的因果解释。 相似文献
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《Endeavour》1996,20(4):157-161
Highly sensitive radar altimeters in Earth orbit sense minute changes in sea level caused by the gravitational attraction of topography on the seafloor. Algorithms that predict the shape of the seafloor implied by the altimeter data allow researchers, for the first time, to produce detailed maps of the largely unexplored Southern Oceans. These new charts have found a number of applications, such as in finding new fishing grounds on shallow submarine banks, improving estimates of the inventory of submarine volcanism, determining the azimuths of faults which mark the past and present drift of tectonic plates, and planning better oceanographic expeditions. 相似文献
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<正>The Central Asian orogenic belt(CAOB),surrounded by the Baltica and Siberia cratons to the north,and the Tarim and North China cratons to the south,records successive evolution cycles of subduction and accretion/collision from Neoproterozoic to the Paleozoic that consumed and eventually closed the Paleo-Asian Ocean[1].Tectonic models of the terminal orogenesis are contentious,with discussions ranging from the time and location of final closure of the Paleo-Asian Ocean to the regional co... 相似文献
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Ryan Tonkens 《Ethics and Information Technology》2012,14(2):137-149
The emerging discipline of Machine Ethics is concerned with creating autonomous artificial moral agents that perform ethically
significant actions out in the world. Recently, Wallach and Allen (Moral machines: teaching robots right from wrong, Oxford
University Press, Oxford, 2009) and others have argued that a virtue-based moral framework is a promising tool for meeting this end. However, even if we
could program autonomous machines to follow a virtue-based moral framework, there are certain pressing ethical issues that
need to be taken into account, prior to the implementation and development stages. Here I examine whether the creation of
virtuous autonomous machines is morally permitted by the central tenets of virtue ethics. It is argued that the creation of
such machines violates certain tenets of virtue ethics, and hence that the creation and use of those machines is impermissible.
One upshot of this is that, although virtue ethics may have a role to play in certain near-term Machine Ethics projects (e.g.
designing systems that are sensitive to ethical considerations), machine ethicists need to look elsewhere for a moral framework
to implement into their autonomous artificial moral agents, Wallach and Allen’s claims notwithstanding. 相似文献
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针对软件开发人员经常面对如何实现类的继承映射,研究了实现类的继承映射的几种实现方法,重点分析每种方法的优缺点,并给出如何使用的几点建议。解决软件开发过程中存在继承关系的对象持久化问题。 相似文献
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本文通过共词分析法、知识图谱和社会网络分析法研究和揭示近五年国内外创造力领域的知识结构和研究热点。研究结果表明,近五年国内外学者都较为关注创造力领域的研究,研究成果数量呈逐年上涨趋势;近五年国内外在该领域的知识结构均由5个知识组织构成,然后通过Netdraw软件绘制国内外该领域知识结构的知识图谱,发现心理学领域的创造力研究是国内外最大的知识组织,其次是教育领域和企业管理领域的创造力研究,最后利用社会网络分析法揭示了国内外创造力领域及其各知识组织的研究热点。 相似文献