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China's first lunar probe Chang'e-I named after a mythical Chinese goddess who according to legend made her home on the moon blasted off on October from the Xichang Satellite Launch Center in the southwestern province of Sichuan. In addition to making the dream cherished by Chinese people to fly to the moon come true it is the first step into China's ambitious threestage moon mission marking a new milestone in the country's space exploration history.…… 《中国科学院院刊(英文版)》2007,21(4):194-195
China's first lunar probe Chang'e-I, named after a mythical Chinese goddess who, according to legend, made her home on the moon, blasted off on 24 October from the Xichang Satellite Launch Center in the southwestern province of Sichuan. In addition to making the dream cherished by Chinese people to fly to the moon come true, it is the first step into China's ambitious threestage moon mission, marking a new milestone in the country's space exploration history. 相似文献
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大力培育和推进科学共同体的奖励活动 总被引：3，自引：0，他引：3
完整的科技奖励系统是由科学共同体内外部两个子奖励系统构成.在我国的科技奖励系统中,科学共同体内部奖励系统比较薄弱;加强科学共同体的科技奖励活动,是改进、完善我国科技奖励制度的一项重要内容. 相似文献
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现代基础科学研究的主体,已经从牛顿时代主要以科学好奇心为动力的精神探险,演变为具有强烈目的性的、经常以重大社会需求为方向的、一般是有组织的大规模社会行为。现在大概已很少有人再会说我国不需要基础研究了,需要讨论的是怎样在有限的经费支持下,以最高的效率开展基础研究。首先,科技研究体制尚需改革,在研究方向选择和研究基金分配中,各研究所和研究组的本位主义应受到限制。也许可建立这样一种机制,即在可能的情况下,科学家及其相关课题组不参加本人建议设立的研究项目。选择新的基础研究机构或课题组负责人时,一定要在世… 相似文献
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在绘画创作中真正能够打动人心的作品是在于意境远胜技术的表现之中,作品成功的关键是跨越技术层面进入心境感应.只有情感的注入,才能使艺术鲜活地飞翔,而艺术者的思想和观点以及对人生和生活的理解都无一真实的诠释在其作品中. 相似文献
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研究表明,白血病等癌诊的高发和家居环境核辐射水平相关.因此,国家规定了建材和家居装修材料中的放射性限量.并规定要用γ多道能谱仪对建材和家居装修材料进行放射性活度的测量.本文介绍了"网络型家居辐射测量系统"的开发,给出详细的设计方案.介绍了系统的总的框架、硬件组成,阐述了系统的软件组成. 相似文献
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将知识发现技术与客户价值生命周期有效地结合起来,全面系统地从系统总体结构、运作模式和实现技术等角度研究企业分析型CRM所面临的分布性、动态性问题.通过客户获取模块,发现目标客户及潜在客户;通过客户保持模块,划分出成长、成熟、流失客户.系统根据客户的行为数据进行欺诈检测、价值分析、流失分析等.以此建立起客户全生命周期的信用度、贡献度及忠诚度模型,从而从多个视图对客户进行综合评估,选择出有价值的客户.最后,本系统还可通过调查问卷等形式测度出客户的满意度,对企业一些服务流程进行改进,以最大化地提升客户价值,实现面向整个客户生命周期价值的客户行为分析决策支持系统. 相似文献
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针对企业对实时个性化推荐的需求,基于信息流的表达、生成和分析对顾客访问记录进行了深层次挖掘,研究了电子商务系统实时个性化推荐策略,提出了包含信息流定义、信息流评价、知识匹配、网站动态组织等算法在内的个性化推荐算法.基于J2EE技术完成了包含客户端、服务器端和存储系统在内的实时动态个性化推荐系统的结构设计.实例表明,随着训练次数的增加推荐准确度呈升高的趋势,并优于关联规则法. 相似文献
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Each of us has a personal narrative: a story that defines us, and one that we tell about ourselves to our inner and outer worlds. A strong sense of identity is rooted in a personal narrative that has coherence and correspondence (Conway in J Mem Lang 53:594–628, 2005): coherence in the sense that the story we tell is consistent with and supportive of our current version of ‘self’; and correspondence in the sense that the story reflects the contents of autobiographical memory and the meaning of our experiences. These goals are achieved by a reciprocal interaction of autobiographical memory and the self, in which memories consistent with the self-image are reinforced, in turn strengthening the self-image they reflect. Thus, personal narratives depend crucially on the malleable nature of autobiographical memory: a strong sense of self requires that one remember what matters, and forget what does not. Today, anyone who is active online generates a highly detailed, ever—expanding, and permanent digital biographical ‘memory’—memory that identifies where we go, what we say, who we see, and what we do in increasing detail as our physical lives become more and more enmeshed with electronic devices capable of recording our communications, online activities, movements, and even bodily functions. This paper explores the consequences of this digital record for identity, arguing that it presents a challenge to our ability to construct our own personal narratives–narratives that are central to a sense of ‘self’. In the end, the ‘right to be forgotten’ may be, above all else, a psychological necessity that is core to identity—and therefore a value that we must ensure is protected. 相似文献
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图书情报学方法研究是图书情报学基础理论研究的重要组成部分.针对目前图书情报学研究所存在的问题,借鉴科学学理论方法来开展图书情报学方法论研究,以期对我国的图书情报学研究有所裨益. 相似文献
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高校图书馆实时咨询服务开展现状及对策分析 总被引：6，自引：0，他引：6
从开展数量、咨询软件、服务时间、服务对象四个方面对高校图书馆实时咨询服务的开展现状进行了调查与分析,用经济障碍和人员障碍概括了高校图书馆实时咨询服务的发展障碍,最后提出开展IM咨询服务和合作式咨询服务的对策. 相似文献
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The paper presents a study investigating the effects of incorporating novelty detection in automatic text summarisation. Condensing a textual document, automatic text summarisation can reduce the need to refer to the source document. It also offers a means to deliver device-friendly content when accessing information in non-traditional environments. An effective method of summarisation could be to produce a summary that includes only novel information. However, a consequence of focusing exclusively on novel parts may result in a loss of context, which may have an impact on the correct interpretation of the summary, with respect to the source document. In this study we compare two strategies to produce summaries that incorporate novelty in different ways: a constant length summary, which contains only novel sentences, and an incremental summary, containing additional sentences that provide context. The aim is to establish whether a summary that contains only novel sentences provides sufficient basis to determine relevance of a document, or if indeed we need to include additional sentences to provide context. Findings from the study seem to suggest that there is only a minimal difference in performance for the tasks we set our users and that the presence of contextual information is not so important. However, for the case of mobile information access, a summary that contains only novel information does offer benefits, given bandwidth constraints. 相似文献
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This paper reports the results of a study of MySpace use, by Sydney high school children. It examines the reasons why children disclose information on the website and their understanding of some of the privacy issues involved. The study provides a useful beginning for further work in this area. Regression is used to validate a proposed model of the factors influencing information disclosure and cluster analysis provides an indication of characteristics shared by children who disclose sensitive information, such as name, address and telephone number. It also suggests that children who are taught to value privacy are less likely to disclose sensitive information on-line. 相似文献
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Lucien E. Picolet 《Journal of The Franklin Institute》1927,204(5):687