Stereoscopic pair of photographs taken by Underwood & Underwood in c.1900 of Prome (Pyay) in Pegu (Bago), Burma (Myanmar). Prome, one of the largest towns ...
0000 - Gale Group | NCCO Photography
Richard C. Dubes, Anil K. Jain,
Clustering algorithms tend to generate clusters even when applied to random data. This paper provides a semi- ... cluster validity, or the verification of results from clustering algorithms. The paper covers ways of measuring clustering tendency, the fit of hierarchical and partitional structures ... identification demonstrates several indices. The development of new clustering techniques and the wide availability of clustering programs necessitates vigorous research in cluster validity.
Tópico(s): Data Management and Algorithms
1979 - Elsevier BV | Pattern Recognition
Directory of Open Access Books (DOAB)
Andrew Robson, Amanda Andrews, Robert Cole, DJM, Professor Colin Pillinger, Simon Barnes, Michael Owen, Mark Souster, David Rose, Philip Howard, Sir John Tomlinson, Carol Midgley, David Lister Scotland Correspondent, David Chater, James Bone, James Ducker, Penny Wark, Clive Davis, David Charter and Michael Evans, Sir Edward Crew, Kevin Eason, Sam Lister, Joe Joseph, Will Pavia and Dominic Kennedy, Jane MacArtney, Donald Hutera, David Tennant, Stewart Tendler Crime Correspondent, David Springall, Tom Bawden, Dominic Walsh, Rory Watson, George Harewood, Joe Morgan, Valerie Masterson, Tim Reid, Dr Chris R. Tame, Jill Dupleix, Dan Sabbagh, Dalya Alberge Arts Correspondent, Richard Ford Home Correspondent, Stephen Farrell, John Blundell, Rick Naylor, Graham Keeley, Charles Clarke, Greg Hurst, David Charter, Karen McVeigh, Hugo Rifkind, Angela Jameson, Russell Kempson, Sir Thomas Allen, Gary Duncan Economics Editor, Oliver Kay, Gerard Baker, Ross Clark, Dame Felicity Lott, Patrick Hosking Investment Editor, Ann Treneman, Geoffrey Dean, David Powell Athletics Correspondent, Boris Becker, Raymond Keene, Jane MacArtney and Leo Lewis, Amanda Holloway, Matt Hughes, Sean O'Neill, Nigel Hawkes, Chris Campling, Damian Whitworth, Mick Hume, Roger Boyes, Susan Crawford, Nick Hasell, Andrew Jack, David Hands Rugby Correspondent, Tom Dart, Paul Simons, Adam Fresco, Anna Frame, Steve Jelbert, Tom Bentley, Judy Dixey, Sir Charles MacKerras, John Goodbody, Jonathan Clayton, Giles Whittell, Jane Shilling, Ian Johns, David Fisher, Graham Searjeant Financial Editor, Anjana Ahuja, George Caulkin, Catherine O'Brien, Ben MacIntyre, David Southwood, David Sanderson, Martin Waller, Dominic Kennedy and Will Pavia, Carl Mortished International Business Editor, Nigel Hawkes Health Editor, Sarah Butler, Ashling O'Connor, Benedict Nightingale, Lydia Hislop, Stephen Dalton, Dr Thomas Stuttaford, M. Wood, Sally Burgess, Hugh Weatherly, Adam Sherwin, Alan Lee Racing Correspondent, Owen Slot, Olav Bjortomt, Gwynne Howell, Jenny Davey, Sam Lister Health Correspondent, Joe Bolger, Elizabeth Judge Telecoms Correspondent, Simon Keenlyside,
... Lucky 13 Fly the EU flag Dispersed refugees 'clustering in ghettos' 1 in 10 lifers disappear on ...
2005 - Gale Group | TDA
... the experimenter. Subsequent work led to an automatic clustering procedure which, given only a set of clustering parameters, clustered patterns with the same performance as ... Since a naive user of such a statistical clustering algorithm could not be expected, in general, to know how to choose the word clustering parameters, even this automatic clustering algorithm was not appropriate for a completely general ... the purpose of this paper to present a clustering algorithm based on a standard K-means approach ...
Tópico(s): Fuzzy Logic and Control Systems
1985 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Acoustics Speech and Signal Processing
National Library of Medicine (NCBI)
Robert Mcnamara, Thomas Ricketts, Fouad Diouman, Bill Cash, Mohammed Kamil, Noriaki Kinoshita, M.D. Agostini, Randy Rodgers,
... soft? Deutsche Bank Byers's axe Competition policy Clustering in Hackney The East End System failure? Children ...
2000 - Gale Group | The Economist
Anurag Srivastava, M. Narasimha Murty,
Clustering is a process of partitioning a given set of patterns into meaningful groups. The clustering process can be viewed as consisting of the ... classification phase, and (iii) description generation phase. Conventional clustering algorithms implicitly use knowledge about the clustering environment to a large extent in the feature ... measure of similarity in the classification phase. Conceptual clustering algorithms proposed by Michalski and Stepp [IEEE Trans. ... 1986)] make use of the knowledge about the clustering environment in the form of a set of ...
Tópico(s): Neural Networks and Applications
1990 - Elsevier BV | Pattern Recognition
Giles Tremlett, David Adams, Helen Johnstone, Nick Nuttall Environment Correspondent, Robert Cole, Mark Inglefield Political Reporter, Julian Muscat, Tennis Correspondent, Chris Ward, Adrian Lee, Roger Cooke, Richard Pollard, Raymond Snoddy, Media Editor, Michael Evans Defence Editor, Philip Howard, Hilary Finch, Joanna Bale, Alexandra Frean Social Affairs Correspondent, Carl Mortished, James Landale, Political Correspondent, Alan Davies: Urban Trauma, K. A. Webster, Robert Sheehan, Bridge Correspondent, Marit Hargle, Joe Joseph, Pat Gibson, George Ross, Dominic Walsh, Debra Craine, Philip L. Wheeler, Raymond Keene Chess Correspondent, John Street, Nicholas Booth, Rachel Kelly, Matthew Parris Political Sketch, Michael Evans, Defence Correspondent, Sarah Cunningham, Retail Correspondent, Alan Hamilton, Stephen Farrell, Jill Sherman Chief Political Correspondent, Gillian Harris, Scotland Correspondent, Michael Clark, Anatole Kaletsky, Janet Bush, Oliver Holt, Football Correspondent in Kiev, Charles Bremner, Neil Edmond, Joseph Connolly, Charles Wilson, John Kavanagh, Katherine Bergen, Helen Rumbelow, Deborah Collcutt, Victoria Fletcher, Bronwen Maddox and Ian Brodie, Jasper Gerard, Valerie Elliott Whitehall Editor, Russell Kempson, Vanora Bennett, Nigel Williamson, Janet Bush and Alasdair Murray, Lisa Armstrong, Audrey Magee, Ireland Correspondent, Michael Evans and Shirley English, Simon de Bruxelles, John Goodbody and Hannah Cowdy, Alan Toogood, Horticulture Correspondent, Stephen Wood, David Watts, Malcolm Rifkind, Tom Millest, D. N. Vermont, Adam Jones, David Powell Athletics Correspondent, Marcus Binney, Raymond Keene, Christine Buckley, Andrew Selous, Matt Dickinson, Frances Gibb, Legal Correspondent, Paul Wilkinson, Ian Richardson, Kerry Blackwell, Haaretz, Tel Aviv, Chris Partridge, Nigel Hawkes, Adam Barnard, Caroline Merrell, Bronwen Maddox, Richard Owen, Damian Whitworth, Benjamyn Damazer, Raymund Dring, Oliver August, Ian Murray Medical Correspondent, Stewart Tendler, Hettie Judah, W. Stephen Gilbert, John Allison, Geof Wheelwright, Ben Wakeham, Christopher Walker, Simon De Bruxelles, Saeed Shah, Jason Nissé, Jennai Cox, Richard Evans Racing Correspondent, Anjana Ahuja, George Caulkin, Tim Wapshott, J. F. James, N. W. Tyler, Peter Riddell, Ray Hatley, Ian Brodie, Edward Karam, Alan Lee Cricket Correspondent, Tony Dawe, Jo Darke Chief Executive, Philip Webster and Janet Bush, Christopher Underwood, Fraser Nelson, Tim Jones, Martin Waller, Alan Coren, Benedict Nightingale, Nigel Powell, Alistair Henderson, Marianne Curphey, Frances Gibb Legal Correspondent, Lindsay Nicolle, Lesley O'Toole, Bill Edgar, Sam Kiley, Arthur Leathley, Robin Lodge, Lyric, Hammersmith, Anthony Barnett, David Hands, Rugby Correspondent, David Hartley, Chas M. Cochand, Oliver Rockberger, Patience Wheatcroft, Alasdair Murray, Economics Correspondent, Lisa Verrico, Joanna Coles, Susan Emmett, Arthur Leathley Transport Correspondent,
... urged to fight greenhouse gas Carbon Emissions Business clustering boosted Enterprise The Times Funds may be forced ...
1998 - Gale Group | TDA
Apostolos Gerasoulis, Sesh Venugopal, Tao Yang,
Clustering is a mapping of the nodes of a task graph onto labeled clusters. We present a unified framework for clustering of directed acyclic graphs (DAGs). Several clustering algorithms from the literature are compared using this ... two interesting properties are presented. For every nonlinear clustering there exists a linear clustering whose parallel time is less than the nonlinear one. Furthermore, the parallel time of any linear clustering is within a factor of two of the optimal. Two clustering algorithms are presented with near linear time complexity ...
Tópico(s): Distributed and Parallel Computing Systems
1990 - ACM SIGARCH | ACM SIGARCH Computer Architecture News
National Bureau of Economic Research (NBER)
Martin Duke, J.H. Edwards, Raul Ward, Naomi Haga, Chris Bamford, Jan Kalicki,
... China The Economist - Public Network The complications of clustering On the tiles Lord Switch-off GEC The ...
1999 - Gale Group | The Economist
Clustering techniques play an important role in exploratory pattern analysis, unsupervised learning and image segmentation applications. Many clustering algorithms, both partitional clustering and hierarchical clustering, require intensive computation, even for a modest number of patterns. This paper presents two parallel clustering algorithms. For a clustering problem with N = 2n ...
Tópico(s): Advanced Data Compression Techniques
1989 - Elsevier BV | Parallel Computing
National Bureau of Economic Research (NBER)
Edie Rasmussen, Peter Willett,
... of the scanning and matching operations required in clustering to be carried out in parallel. Experiments are ... the single linkage and Ward's hierarchical agglomerative clustering methods on both real and simulated datasets. Clustering runs on the DAP are compared with the ... depending on the size of the dataset, the clustering method, and the serial clustering algorithm that is used. An analysis of the ...
Tópico(s): Algorithms and Data Compression
1989 - Emerald Publishing Limited | Journal of Documentation
National Bureau of Economic Research (NBER)
W. L. W. Sargent, Charles C. Steidel, A. Boksenberg,
... a New Sample of 55 QSOs: Evolution and Clustering of the Heavy-Element Absorption Redshifts Sargent, Wallace ... line of sight. In addition, there is significant clustering of the redshifts on scales up to 600 ... of the absorbers. Analysis shows that the observed clustering is unlikely to be due to relative motions ... but instead is a manifestation of galaxy-galaxy clustering. The amplitude of the clustering is compared with the predictions of published simulations of the evolution of clustering in "cold dark matter" cosmological models. The observed ...
Tópico(s): Inorganic Fluorides and Related Compounds
1988 - Institute of Physics | The Astrophysical Journal Supplement Series
Swagatam Das, Ajith Abraham, Amit Konar,
... chapter provides a comprehensive overview to the data clustering techniques, based on naturally-inspired metaheuristic algorithms. At first the clustering problem, similarity and dissimilarity measures between patterns and ... presented in a formal way. A few classical clustering algorithms are also addressed. The chapter then discusses ... with a focus on evolutionary computing in pattern clustering and outlines the most promising evolutionary clustering methods. The chapter ends with a discussion on the automatic clustering problem, which remains largely unsolved by most of ...
Tópico(s): Face and Expression Recognition
2009 - Springer Nature | Studies in computational intelligence
Yün Chi, Xiaodan Song, Dengyong Zhou, Koji Hino, Belle L. Tseng,
Evolutionary clustering is an emerging research area essential to important applications such as clustering dynamic Web and blog contents and clustering data streams. In evolutionary clustering, a good clustering ...
Tópico(s): Face and Expression Recognition
2009 - Association for Computing Machinery | ACM Transactions on Knowledge Discovery from Data
Sriparna Saha, Sanghamitra Bandyopadhyay,
In this paper the problem of automatic clustering a data set is posed as solving a multiobjective optimization (MOO) problem, optimizing a set of cluster validity indices simultaneously. The proposed multiobjective clustering technique utilizes a recently developed simulated annealing based ... present in a data set. Thus the proposed clustering technique is able to detect both the proper ... final Pareto optimal front of the proposed multiobjective clustering technique. The efficacy of the proposed algorithm is ...
Tópico(s): Advanced Multi-Objective Optimization Algorithms
2009 - Elsevier BV | Pattern Recognition
Congnan Luo, Yanjun Li, Soon M. Chung,
Clustering is a very powerful data mining technique for topic discovery from text documents. The partitional clustering algorithms, such as the family of k-means, are reported performing well on document clustering. They treat the clustering problem as an optimization process of grouping documents ... Guha, R. Rastogi, K. Shim, ROCK: a robust clustering algorithm for categorical attributes, Information Systems 25 (5) (2000) 345–366], to document clustering. If two documents are similar enough, they are ...
Tópico(s): Data Management and Algorithms
2009 - Elsevier BV | Data & Knowledge Engineering
Ujjwal Maulik, Anirban Mukhopadhyay, Sanghamitra Bandyopadhyay,
... conditions or time points. Using microarray data sets, clustering algorithms have been actively utilized in order to ... genes. This article poses the problem of fuzzy clustering in microarray data as a multiobjective optimization problem ... indices to yield a set of Pareto-optimal clustering solutions. Each of these clustering solutions possesses some amount of information regarding the clustering structure of the input data. Motivated by this ... majority voting approach is proposed to combine the clustering information from all the solutions in the resultant ...
Tópico(s): Bioinformatics and Genomic Networks
2009 - BioMed Central | BMC Bioinformatics