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Topologische Datenanalyse : eine Einführung in die Persistente Homologie und Mapper

Nastansky, Andreas - 2019

geben und konzentriert sich dabei auf zwei wichtige Aspekte: die Persistente Homologie und den Mapper. Dabei werden zuerst … Bereichen Formerkennung und -beschreibung. Der Mapper als zweites wichtiges Konzept der TDA wandelt umfangreiche …. Des Weiteren ist die Mapper-Methode ein brauchbares Werkzeug zur Visualisierungen von mehrdimensionalen Daten, woran …

Persistent link: https://www.econbiz.de/10013483906

Frequent Itemset Mining in Large Datasets a Survey

Kumar, Manish; Pal, Amrit - In: International Journal of Information Retrieval Research … 7 (2017) 4, pp. 37-49

Frequent Itemset Mining is a well-known area in data mining. Most of the techniques available for frequent itemset mining requires complete information about the data which can result in generation of the association rules. The amount of data is increasing day by day taking form of BigData,...

Persistent link: https://www.econbiz.de/10012045562

MAPPER, a low-level geographic information system

Coronado, G.; Froese, R. - In: Naga 16 (1993) 4, pp. 43-45

Persistent link: https://www.econbiz.de/10010554184

Mapping firms' locations in technological space : a topological analysis of patent statistics

Escolar, Emerson G.; Hiraoka, Yasuaki; Igami, Mitsuru; … - In: Research policy : policy, management and economic … 52 (2023) 8, pp. 1-15

Persistent link: https://www.econbiz.de/10014484622

Application of a Genetic Algorithm to Variable Selection in Fuzzy Clustering

Röver, Christian; Szepannek, Gero - 2004

In order to group the observations of a data set into a given number of clusters, an 'optimal' subset out of a greater number of explanatory variables is to be selected. The problem is approached by maximizing a quality measure under certain restrictions that are supposed to keep the subset most...

Persistent link: https://www.econbiz.de/10010296660

Classification-relevant Importance Measures for the West German Business Cycle

Garczarek, Ursula; Weihs, Claus; Enache, Daniel - 2005

When analyzing business cycle data, one observes that the relevant predictor variables are often highly correlated. This paper presents a method to obtain measures of importance for the classification of data in which such multicollinearity is present. In systems with highly correlated variables...

Persistent link: https://www.econbiz.de/10010296698

Determination of hyper-parameters for kernel based classification and regression

Marin-Galiano, Marcos; Luebke, Karsten; Christmann, Andreas - 2005

The optimization of the hyper-parameters of a statistical procedure or machine learning task is a crucial step for obtaining a minimal error. Unfortunately, the optimization of hyper-parameters usually requires many runs of the procedure and hence is very costly. A more detailed knowledge of the...

Persistent link: https://www.econbiz.de/10010296699

Prediction Optimal Classification of Business Phases

Weihs, Claus; Luebke, Karsten - 2005

Linear Discriminant Analysis (LDA) performs well for classifica- tion of business phases – even though the premises of an LDA are not met. As the variables are highly correlated there are numerical as well as interpretational shortcomings. By transforming the classification problem to a...

Persistent link: https://www.econbiz.de/10010296702

Does globalization restrict budgetary autonomy? A multidimensional approach

Heinemann, Friedrich - 1999

Does globalization restrict the leeway for national budgetary policy? With the help of cluster and discriminant analysis this study provides evidence on the basis of the experience of OECD countries since the 1970s. Four budgetary dimensions are included in the analysis: tax structure,...

Persistent link: https://www.econbiz.de/10010297629

Inflation/unemployment regimes and the instability of the Phillips curve

Ormerod, Paul; Rosewell, Bridget; Phelps, Peter - 2009

Using the statistical technique of fuzzy clustering, regimes of inflation and unemployment are explored for the United States, the United Kingdom and Germany between 1871 and 2009. We identify for each country three distinct regimes in inflation/unemployment space. There is considerable...

Persistent link: https://www.econbiz.de/10010299186

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