Sökning: "OUTLIERS"

Visar resultat 6 - 10 av 91 avhandlingar innehållade ordet OUTLIERS.

1. 6. Data Mining Approaches for Outlier Detection Analysis

   Författare :Shahrooz Abghari; Niklas Lavesson; Håkan Grahn; Veselka Boeva; Olga Fink; Blekinge Tekniska Högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; outlier detection; data modelling; machine learning; clustering analysis; data stream mining; Computer Science; Datavetenskap;

   Sammanfattning : Outlier detection is studied and applied in many domains. Outliers arise due to different reasons such as fraudulent activities, structural defects, health problems, and mechanical issues. The detection of outliers is a challenging task that can reveal system faults, fraud, and save people's lives. LÄS MER

3. 7. Data Modeling for Outlier Detection

   Författare :Shahrooz Abghari; Niklas Lavesson; Håkan Grahn; Veselka Boeva; Anders Holst; Blekinge Tekniska Högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; data modeling; cluster analysis; stream data; outlier detection;

   Sammanfattning : This thesis explores the data modeling for outlier detection techniques in three different application domains: maritime surveillance, district heating, and online media and sequence datasets. The proposed models are evaluated and validated under different experimental scenarios, taking into account specific characteristics and setups of the different domains. LÄS MER

4. 8. Essays on Economic Voting, Cognitive Dissonance, and Trust

   Författare :Mikael Elinder; Sören Blomquist; Henrik Jordahl; David Strömberg; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economic voting; Voting; Regional economic conditions; Political attitudes; Cognitive dissonance; Social capital; Trust; Economic growth; Robustness; Applied econometrics; Elections; Self-interest; Election promise; Pocketbook voting; Prospective voting; Retrospective voting; Child care; Local economic conditions; Economics; Nationalekonomi; Economics; Nationalekonomi;

   Sammanfattning : Essay 1: (with Henrik Jordahl and Panu Poutvaara) We present and test a theory of prospective and retrospective pocketbook voting. Focusing on two large reforms in Sweden, we establish a causal chain from policies to sizeable individual gains and losses and then to voting. LÄS MER

5. 9. Spatial issues in economics and econometrics

   Författare :Christer Berglund; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

   Sammanfattning : This thesis consists of four self-contained papers, divided into two parts where the first part considers issues in economics and the second discusses spatial issues in econometrics. In paper [1] the different waste disposal options, with emphasis on recycling and incineration, is examined and evaluated, using earlier research. LÄS MER

7. 10. Source and Channel Coding for Audiovisual Communication Systems

   Författare :Moo Young Kim; Bastiaan Kleijn; Richard Heusdens; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikation; Information theory; high-rate theory; source coding; channel coding; quantization; Telekommunikation; Telecommunication; Telekommunikation;

   Sammanfattning : Topics in source and channel coding for audiovisual communication systems are studied. The goal of source coding is to represent a source with the lowest possible rate to achieve a particular distortion, or with the lowest possible distortion at a given rate. Channel coding adds redundancy to quantized source information to recover channel errors. LÄS MER