FAST ALGORITHM FOR DCT DOMAIN IMAGE UP-CONVERSION     

李宏东  解蓉  刘济林  顾伟康 《Journal of Zhejiang University. Science. B》2000,(3)

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｒｅａｒｅｃｏｎｓｔａｎｔｌｙｉｎｃｒｅａｓｉｎｇｄｅｍａｎｄｓｉｎｒｅｃｅｎｔｙｅａｒｓｆｏｒｍｕｌｔｉｍｅｄｉａａｐｐｌｉｃａｔｉｏｎｓ,ｖａｒｉｏｕｓｉｍａｇｅ/ｖｉｄｅｏ ｐｒｏｃｅｓｓｉｎｇｍｅｔｈｏｄｓｉｎｃｌｕｄｉｎｇｉｍａｇｅｅｎｈａｎｃｅｍｅｎｔａｎｄｒｅｓｔｏｒａｔｉｏｎ ,ｖｉｄｅｏｃｏｍｐｏｓｉｔｉｏｎ ,ｃｏｌｏｒｃｏｍｐｅｎｓａｔｉｏｎ ,ａｎｄｓａｍｐｌｅｓｔｒｕｃｔｕｒｅｃｏｎ ｖｅｒｓｉｏｎ (ｄｏｗｎ ｃｏｎｖｅｒｓｉｏｎａｎｄｕｐ ｃｏｎｖｅ…  相似文献   

Intelligent scientific authoring tools: Interactive data mining for constructive uses of citation networks     

B. Berendt  B. Krause  S. Kolbe-Nusser 《Information processing & management》2010

Many powerful methods and tools exist for extracting meaning from scientific publications, their texts, and their citation links. However, existing proposals often neglect a fundamental aspect of learning: that understanding and learning require an active and constructive exploration of a domain. In this paper, we describe a new method and a tool that use data mining and interactivity to turn the typical search and retrieve dialogue, in which the user asks questions and a system gives answers, into a dialogue that also involves sense-making, in which the user has to become active by constructing a bibliography and a domain model of the search term(s). This model starts from an automatically generated and annotated clustering solution that is iteratively modified by users. The tool is part of an integrated authoring system covering all phases from search through reading and sense-making to writing. Two evaluation studies demonstrate the usability of this interactive and constructive approach, and they show that clusters and groups represent identifiable sub-topics.  相似文献   

一种解决协作过滤中矩阵稀疏性问题的算法     

白丽君  刘君强  陈子侠  黄红勇 《情报学报》2005,24(2):199-202

为了帮助用户有效地发现、过滤和利用信息 ,信息过滤技术应运而生。协作过滤作为其中一种技术也得到迅速发展 ,但传统的协作过滤算法存在矩阵稀疏性等问题 ,影响预测效果。本文给出一种基于信息项的新算法 ,它从矩阵的列来考虑 ,能有效地解决矩阵稀疏性等问题 ,并提高预测准确性。  相似文献   

基于多维度特征和MLP的岩体点云植被滤波方法     

胡亮  肖俊  王颖 《中国科学院大学学报》2020,37(3):345-351

岩体点云滤波是岩体三维重建的关键环节。针对岩体点云环境,提出一种基于多维度特征和多层神经网络的植被滤波方法。该方法首先计算点云中每一点的多维度特征作为特征输入;然后利用多层神经网络构建分类器实现对岩体点云数据的植被滤波过程。分析多维度特征的可用性,并通过不同的实验过程筛选最优网络模型参数。与其他分类器相比,本算法精度较高,能够更好地应用于岩体点云植被滤波领域。  相似文献   

A multiview graph collaborative filtering by incorporating homogeneous and heterogeneous signals     

《Information processing & management》2022,59(6):103072

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