共查询到20条相似文献,搜索用时 0 毫秒
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基于遗传算法学习聚类算法的中心个数 总被引:2,自引:0,他引:2
无导师聚类算法的目标是将一个数据集划分为若干个类,使得类内相似性尽可能大且类间相似性尽可能小。聚类过程中对数据集合分割成多少个类是一个很难确定的问题,目前还没有较好的解决方法。文章使用遗传算法对无导师聚类K-均值(K-means)算法中中心个数K值进行学习,实现了使用遗传算法进行聚类中心个数的确定,旨在提供一种选择中心参数个数的方法。通过对UCI机器学习数据库中的7个数据库进行实验,证实此方法是比较有效的。 相似文献
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Geoffrey C. Fox Mehmet S. Aktas Galip Aydin Harshawardhan Gadgil Shrideep Pallickara Marlon E. Pierce Ahmet Sayar 《Computing and Visualization in Science》2009,12(3):115-124
We review the impact of Grid Computing and Web Services on scientific computing, stressing the importance of the “data-deluge”
that is driven by deployment of new instruments, sensors and satellites. This implies the need to integrate the naturally
distributed data sources with large simulation engines offering parallel low latency communication and so to integrate parallel
and Grid computing paradigms. We start with an overview of these and the evolving service architectures. We illustrate the
identified areas of interest for Algorithms and the Grid with the specific example of SERVOGrid that supports earthquake science
research. We comment on the appropriate messaging infrastructure for Grids and data assimilation and contrast it with MPI. 相似文献
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网络安全中流量分析的算法 总被引:2,自引:0,他引:2
通常,网络的安全保密可以通过防火墙、密码、审计等措施来实施,而本文提出了通过流量分析实施保护的一种方法,给出了相关的算法和程序实现,同时对算法进行了比较。 相似文献
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Fixed-Parameter Algorithms in Phylogenetics 总被引:1,自引:0,他引:1
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Progress in Quantum Algorithms 总被引:2,自引:0,他引:2
Peter W. Shor 《Quantum Information Processing》2004,3(1-5):5-13
We discuss the progress (or lack of it) that has been made in discovering algorithms for computation on a quantum computer. Some possible reasons are given for the paucity of quantum algorithms so far discovered, and a short survey is given of the state of the field.
PACS: 03.67.Lx 相似文献
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混沌在遗传算法中的应用 总被引:10,自引:0,他引:10
通过对由差分方程生成的混沌序列的分析,利用混沌序列内在的伪随机性,将混沌引入到遗传算法的初始种群的生成、交叉算子、变异算子中,由此得到了混沌遗传优化算法。该算法在克服基本遗传算法中的早熟收敛方面显示了有效性,对大多数检测函数的检测结果表明,算法令人满意。 相似文献
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Dr. R. Dutter 《Computing》1977,18(2):167-176
Several iterative procedures have been proposed and developed to solve numerically the problem of robust regression, in particular, of robust linear regression. The algorithms described here are modified versions of the “sophisticated method” given by Huber (1973, [8]) which sometimes fail to converge. In this paper, the new algorithms are formulated and convergence proofs are given. The behavior of the procedures is illustrated by a numerical example and is compared to another (“simple”) algorithm. 相似文献
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针对机器人足球中KICK技术存在的问题,本文从模糊逻辑、遗传算法、BP神经网络等三个方面,论述了智能算法在机器人足球KICK技术中的应用.在此基础上,提出进一步研究的解决方案. 相似文献
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In this paper, we present the FOC langugage, dedicated to the development of certified computer algebra libraries (that is sets of programs). These libraries are based on a hierarchy of implementations of mathematical structures. After presenting the core set of features of our language, we describe the static analyses, which reject inconsistent programs. We then show how we translate FOC definitions into OCAML and COQ, our target languages for the computational part and the proof checking, respectively. 相似文献
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视频特技中的多层叠加算法 总被引:1,自引:1,他引:0
详细总结了Alpha通道的概念,推导出多层叠加效果中各视频对象的合成规则,并用Adobe After Effects软件了该规则;阐述了用预乘颜色进行了多层叠加的意义,通过证明每层单视频对象的滤波操作 预乘颜色上进行,说明每层视频对象的旋转,缩放操作也在预乘颜色上进行;指出在帧缓存中应存储象素点的预乘颜色值,而不是非预乘颜色值。 相似文献
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基于覆盖的分类算法研究进展 总被引:1,自引:0,他引:1
理解数据与感知数据密切相关.覆盖学习算法在低维空间往往能模拟人的视觉感知来表示数据分布.文中综述了基于覆盖的分类算法的研究进展,特别对基于超曲面的覆盖分类算法进行了详细阐述和分析,并指出了基于超曲面的分类算法进一步研究的方向. 相似文献
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Roberto Tamassia 《Constraints》1998,3(1):87-120
Graphs are widely used for information visualization purposes, since they provide a natural and intuitive representation of complex abstract structures. The automatic generation of drawings of graphs has applications a variety of fields such as software engineering, database systems, and graphical user interfaces. In this paper, we survey algorithmic techniques for graph drawing that support the expression and satisfaction of user-defined constraints. 相似文献