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2006
Abstract To probe the past effectively, we need to study galaxies. These are fossils from the past, because their properties have changed little since formation. Clusters of galaxies are relatively pristine collections of galaxies. Clusters have not changed much since birth, and contain any debris that galaxies may have ejected in their ...
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Abstract To probe the past effectively, we need to study galaxies. These are fossils from the past, because their properties have changed little since formation. Clusters of galaxies are relatively pristine collections of galaxies. Clusters have not changed much since birth, and contain any debris that galaxies may have ejected in their ...
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A fuzzy clustering ensemble based on cluster clustering and iterative Fusion of base clusters
Applied Intelligence, 2019For obtaining the more robust, novel, stable, and consistent clustering result, clustering ensemble has been emerged. There are two approaches in clustering ensemble frameworks: (a) the approaches that focus on creation or preparation of a suitable ensemble, called as ensemble creation approaches, and (b) the approaches that try to find a suitable ...
Musa Mojarad +3 more
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Reorganization of clusters in cluster-cluster-aggregation
AIP Conference Proceedings, 2000X-ray microscopy and scattering experiments give different experimental results when determining the fractal dimension of colloidal clusters. A two dimensional simulation model is presented to describe reorganization of clusters during the aggregation process. Considering this reorganization gives a rapidly increasing fractal dimension from d=1.53 to d=
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Clusters on Clusters:closo-Dodecaborate as a Ligand for Au55 Clusters
European Journal of Inorganic Chemistry, 1999The exchange of PPh3 in Au55(PPh3)12Cl6 by Na2[B12H11SH] using a phase-transfer reaction from CH2Cl2 to water needs 6 weeks for reaction, but finally results in the quantitative formation of Au55[(B12H11SH)Na2]12Cl6 (2). Cluster 2, which is of considerable stability in aqueous solution, has been characterized by 1H-NMR, 11B-NMR, and IR spectroscopy as ...
Schmid, Günter +3 more
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Clustering with the Levy Walk: “Hunting” for Clusters
2016 IEEE 16th International Conference on Data Mining Workshops (ICDMW), 2016The Levy Walk (or Levy flight) is a concept from Biomathematics to describe the hunting?behaviour of many predatory species. It is a very efficient way to find prey in a very short time frame. We now want to use this concept in a clustering?context to ? if you so will ? ?hunt? for clusters.
Benjamin Schelling, Claudia Plant
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Correlation Clustering and Consensus Clustering
2005The Correlation Clustering problem has been introduced recently [5] as a model for clustering data when a binary relationship between data points is known. More precisely, for each pair of points we have two scores measuring respectively the similarity and dissimilarity of the two points, and we would like to compute an optimal partition where the ...
Paola Bonizzoni +3 more
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1978
When one is lecturing in a centre for interdisciplinary research, it is, I imagine, appropriate to start by emphasizing the interdisciplinary character of the topic one is going to discuss. In my case this does not present any difficulty. Clustering is a pictorial term for positive correlations in an ensemble of randomly distributed bodies or events ...
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When one is lecturing in a centre for interdisciplinary research, it is, I imagine, appropriate to start by emphasizing the interdisciplinary character of the topic one is going to discuss. In my case this does not present any difficulty. Clustering is a pictorial term for positive correlations in an ensemble of randomly distributed bodies or events ...
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Fuzzy clustering: Determining the number of clusters
2012 Fourth International Conference on Computational Aspects of Social Networks (CASoN), 2012In this study we analyze behavior of two types of coefficients for determining the suitable number of clusters obtained when fuzzy cluster analysis is applied. First one is Dunn's coefficient which contains membership degrees in its computational formula; second one is the average silhouette width, used primarily for evaluating hard clustering.
Hana Rezanková, Dusan Húsek
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Cluster headache and cluster variants
Current Treatment Options in Neurology, 2003Patients must be cognizant of the time course of the cluster headache periods to optimally tailor their therapy. Steroids provide the fastest onset of prophylactic effect. Once steroids are initiated, it remains difficult to wean patients off of them, and that is why it is always recommended to associate another prophylactic agent from the onset with ...
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On the Number of Clusters in Cluster Analysis
1998Clustering is a fundamental tool for analyzing the structure of feature spaces. It has been applied to various fields such as pattern recognition, information retrieval and so on. Many studies have been done on this problem and various kinds of clustering methods have been proposed and compared (e.g., [1]).
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