Semi-Supervised and Unsupervised Machine Learning Novel Strategies
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Beschreibung
Produktdetails
Einband
Gebundene Ausgabe
Erscheinungsdatum
18.01.2011
Abbildungen
w. figs.
Verlag
John Wiley & Sons IncSeitenzahl
320
Maße (L/B/H)
23,6/15,5/2 cm
Gewicht
499 g
Auflage
1. Auflage
Sprache
Englisch
ISBN
978-1-84821-203-9
Focusing on third generation dialog systems, this book begins with a survey of techniques used for text-mining, supervised text categorization and information retrieval, as well as typical data preparation and feature reduction models. It also illustrates the main commonalities and differences between these fields. However, one main challenge and driver of current and future research is related to adaptability and portability issues: it is a matter of fact that third generation dialog systems, especially in the problem solving area, are subject to continuous domain fluctuations. Moreover, in a broad application domain, the systems will need to operate with different contextual data, and still provide adequate performances with minimum effort or time cost. The dialog system needs to be capable of adapting to new or different data. This means that there is a need for unsupervised analysis and knowledge discovery tools which assist the dialog in detecting potential new topics (e.g. an emerging problem type), or in discovering the structure of a new data collection, for which nothing else is known or assumed. In this field of application the book also provides an interesting survey of unsupervised methods including cluster analysis, cluster content representation and synthesis, cluster evaluation, unsupervised detection of the true number of clusters/classes in a data-set, and ensembles/agreement of clustering approaches.
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