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随着互联网技术的迅速发展,网上文本数量成指数级增长,如何有效地提取出所需干言息成为当前重要的研究课题。首先介绍文本信息检索的研究背景和现状,并讨论信息检索模型和目前广泛使用的文本信息检索算法,然后阐述通用信息检索系统和个性化信息检索系统以及目前的研究状况。最后,基于现存的问题提出了未来的工作。 相似文献
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文章提出了一个用于移动业务的虚拟原藉环境(VHE)平台,该平台具备支撑移动业务的高级特征,可以支持不同网络和终端间的业务环境的可移植性;给出了VHE平台的基本结构和相关功能模块;分析了VHE平台可以提供的高级业务特征(如业务自适应、业务个性化、业务持续性和业务提供);简述了基于VHE的移动智能业务平台的发展趋势和尚需继续解决的问题. 相似文献
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以准确向用户推荐商品,提升电子商务网站销售量为目标,设计基于个性化特征的电子商务智能推荐系统。系统以个性化推荐引擎为核心,采集交易事务、商品特征、用户评价等数据,利用基于个性化特征的协同过滤推荐算法计算商品间相似度,确定新商品的近邻,根据近邻用户对新商品的评价结果选择商品进行推荐。测试结果表明,该系统的电子商务商品推荐误差小,有利于提升电子商务网站交易率,而且电子商务商品推荐性能明显优于其他推荐系统。 相似文献
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旅游活动正在成为全球经济发展的重要动力之一,而旅游线路直接关系着旅游的时间、费用、旅游体验.为设计更合理的覆盖全国5A景区的旅游路线,本文使用聚类分析、贪婪算法、图论等方法并设计了合理的旅游体验函数,最终得到了从西安和北京出发的游客采用全程自驾或结合其它交通工具十年内游遍所有201个5A景区、费用最优、旅游体验最好的旅游线路. 相似文献
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The needs of the wireless and mobile user regarding information access and services are quite different than those of the desktop user. This need is not about browsing the Web but about receiving personalized services that are highly sensitive to the immediate environment and requirements of the user. Personalization appears to be the most appropriate solution to this need. It comes into aid by creating personalized portals that are specific for the wireless user, which (a) are focus on the local content and (b) directly tones down factors that break up the functionally of the Internet/wireless services when viewed through wireless devices; factors like the click count, user response time (the choice factor) and the size of the wireless network traffic. In this paper we present a flexible personalization system for the wireless user that takes into consideration user mobility, the local environment and the user and device profile. The system utilizes the various characteristics of mobile agents to support flexibility, scalability, modularity and user mobility. We present metrics appropriate to the wireless environment, and an initial performance evaluation indicating improvement ranging from 33% up to, for certain metrics, 60%. 相似文献
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随着信息技术的快速发展,各种媒介的信息量也呈几何增长.并引发了当今信息传播形态的深刻变革:人们接受信息的方式,由听命于一家之言到多元意见复合交流,及时反馈;传播关系发生了演变,媒介的一家独尊、传受分明的模式,转向以传为主、传受交互、受传合一的交流网络关系.同时,新闻评论的传播生态发生了变化,在仍然保留主流意见传播者的地位的同时,形式更为灵活,它成为一个议题设置者,开始搭建各种意见交流的平台.新闻评论出现了个性化、专业化的势态.这也要求新闻评论要遵循公共利益的原则,更加注重采用客观公正的表现方式,运用事实说话,而不是不加解释地直接发表结论. 相似文献
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Smartphone的普及对移动核心网带来了信令及数据增长的挑战,运营商不仅需要通过构建新一代移动分组网应对信令及流量挑战,还需要依托移动分组网实施精细化流量经营,提供个性化数据业务,同时通过盘活网络资产,构建能力开放平台实现与OTT合作互赢。 相似文献
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In this paper, we present a method to customize the ground color in outdoor sports video to provide TV viewers with a better viewing experience or subjective satisfaction. This issue, related to content personalization, is becoming critical with the advent of mobile TV and interactive TV. In outdoor sports video, such as soccer video, it is sometimes observed that the ground color is not satisfactory to viewers. In this work, the proposed algorithm is focused on customizing the ground color to deliver a better viewing experience for viewers. The algorithm comprises three modules: ground detection, shot classification, and ground color customization. We customize the ground color by considering the difference between ground colors from both input video and the target ground patch. Experimental results show that the proposed scheme offers useful tools to provide a more comfortable viewing experience and that it is amenable to real‐time performance, even in a software‐based implementation. 相似文献