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31.
Many of the approaches to image retrieval on the Web have their basis in text retrieval. However, when searchers are asked to describe their image needs, the resulting query is often short and potentially ambiguous. The solution we propose is to perform automatic query expansion using Wikipedia as the source knowledge base, resulting in a diversification of the search results. The outcome is a broad range of images that represent the various possible interpretations of the query. In order to assist the searcher in finding images that match their specific intentions for the query, we have developed an image organization method that uses both the conceptual information associated with each image, and the visual features extracted from the images. This, coupled with a hierarchical organization of the concepts, provides an interactive interface that takes advantage of the searchers’ abilities to recognize relevant concepts, filter and focus the search results based on these concepts, and visually identify relevant images while navigating within the image space. In this paper, we outline the key features of our image retrieval system (CIDER), and present the results of a preliminary user evaluation. The results of this study illustrate the potential benefits that CIDER can provide for searchers conducting image retrieval tasks. 相似文献
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论文采用面板数据模型估计了我国制造业集聚的生产率效应,并采用空间俱乐部模型区分了各种效应的地区差别。结果表明,1988-1997年和1998-2009年两个时期,东部和中西部地区均存在显著的静态专业化效应,并且在后期东部的静态专业化效应强于中西部;在整个研究期间,东部和中西部均不存在显著的动态或静态的多样化效应;规模效应在两个时期有所差异,前期在东、中西部均不显著,后期东部存在显著的负向规模效应,而中西部存在正向规模效应,显示出过度集聚开始在东部产生了一定程度的拥塞效应。 相似文献
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Adapting or supplanting production and distribution systems to accommodate new criteria of environmental sustainability entails the search for and the recombination of know-how from a variety of domains. How this process plays out in different areas depends crucially on the specific composition of local economic activities. This paper contributes this debate by analysing whether and to what extent regional industrial and occupational diversification affects the change in green employment across 363 Metropolitan Statistical Areas (MSAs) in the United States between 2006 and 2014. Our findings suggest that industrial unrelated variety within MSAs is a positive and significant predictor of green employment growth whereas related variety has very little impact. Conversely, both related and unrelated diversification across occupations are positively associated with green employment growth. The analysis also uncovers heterogeneity across existing, new and evolving green jobs. 相似文献
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探讨制造服务化的前因与结果,提出制造服务化这一中介变量来解释前因变量弹性IT基础建设与结果变量企业绩效的关系,并提出产品多元化会正向调节制造服务化与企业绩效之间的关系。采用276家企业调查数据对研究假设进行检验,结果支持理论预期,揭示制造服务化在弹性IT基础建设对企业绩效的影响机制中扮演着重要的角色。 相似文献
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落实科学发展观将带来图书质量管理变革,图书质量管理变革将导致图书质量管理职能多元化,与此相适应,图书质检人员必须转型为复合型人才. 相似文献
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【目的】 从互联网时代的学术传播的特征出发,论述了加强学术期刊多渠道、全媒体传播的必要性。【方法】 采用文献分析法与案例分析法,对当前学术期刊面临的困境作了回顾和分析,力图从多个维度来构建学术期刊的多元化共生模式。【结果】 在国际化、数字化与网络化的发展趋势下,学术期刊亟需二次转型,运用互联网思维,融入信息化因素,从传统出版模式转向以“互联网+”为主要特征的知识服务产业。【结论】 结合互联网法则和逻辑来重新整合学术出版的运作模式,推演学术期刊与学术共同体、第三方数据库、社会政府之间的多元共生路径,提升学术期刊的知识服务能力和信息传播能力。 相似文献
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经济全球化对我国西部企业的影响,一方面生产国际化走向生产要素配置的全球化,经济增长中心走向多元化,贸易自由化,区域集团化;另一方面,西部企业起步晚,基础差,全球化的发展趋势给西部企业带来了极好机遇.西部企业如何抓住这一机遇,采取有效的营销对策,本文对此问题做了初步探讨. 相似文献
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This thesis is focused on the theme of reforming higher educational talent-cultivating models of our country and improving the quality of talents. In this thesis the logic, theoretical basis and realistic certainty of the diversification ofhigher education talent-cultivating model are revealed, and on the logic and theoretical basis, the practical strategy of the diversification of talentcultivating models is pointed out at the last. 相似文献
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随着时代的发展和社会的进步,中国古代文学教学正面临着日趋严峻的复杂化态势,呈现出诸多值得思考的问题。这主要表现在中国古代文学教学需要强化识记功能,要注意文史结合和教学方式的多样化等方面。优化古代文学教学是个系统工程,任重而道远,只有师生共同努力,不断探索,才能最终实现与时俱进的飞跃。 相似文献
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当前多元化的学习理论各自选取不同的视角,描述和解释了学习现象的某些方面或某一层次,都无法为我们提供对学习的全景认知。签于此,该文试图从生态的视角阐释多元化学习理论的融合,以提高人们对学习的整体性认识。同时,文末还论及了人们对课堂的深化认识。 相似文献