Sökning: "Data base"
Visar resultat 1 - 5 av 1018 avhandlingar innehållade orden Data base.
1. Obtaining Accurate and Comprehensible Data Mining Models : An Evolutionary Approach
Sammanfattning : When performing predictive data mining, the use of ensembles is claimed to virtually guarantee increased accuracy compared to the use of single models. Unfortunately, the problem of how to maximize ensemble accuracy is far from solved. LÄS MER
2. Bootstrapping Named Entity Annotation by Means of Active Machine Learning
Sammanfattning : This thesis describes the development and in-depth empirical investigation of a method, called BootMark, for bootstrapping the marking up of named entities in textual documents. The reason for working with documents, as opposed to for instance sentences or phrases, is that the BootMark method is concerned with the creation of corpora. LÄS MER
3. On models and mappings in a data base environment : a holistic approach to data modelling
Sammanfattning : .... LÄS MER
4. Utilizing Diversity and Performance Measures for Ensemble Creation
Sammanfattning : An ensemble is a composite model, aggregating multiple base models into one predictive model. An ensemble prediction, consequently, is a function of all included base models. Both theory and a wealth of empirical studies have established that ensembles are generally more accurate than single predictive models. LÄS MER
5. Analysis of large-scale metagenomic data
Sammanfattning : The topic of this thesis is the analysis of large data sets of DNA sequence data produced from modern high-throughput DNA sequencing machines. Using such machines to sequence the genetic content of a microbial community produces a metagenome. This thesis comprises three research papers, all connected to the study of large metagenomic data sets. LÄS MER
