Essays about: "Topic Models"

Showing result 11 - 15 of 531 essays containing the words Topic Models.

1. 11. Regression and time estimation in the manufacturing industry

   University essay from Uppsala universitet/Statistik, AI och data science

   Author : Walter Bjernulf; [2023]
   Keywords : regression; linear regression; regression trees; random forests; cross validation; variable selection; conformal prediction;

   Abstract : In this thesis an analysis is performed on operation times for different sized products in a manufacturing company. The thesis will introduce and summarise most of the theory needed to perform regression and also cover a worked example where three different regression models are learned, evaluated and analysed. READ MORE

3. 12. MetaStackVis: Visually-Assisted Performance Evaluation of Metamodels in Stacking Ensemble Learning

   University essay from Linnéuniversitetet/Institutionen för datavetenskap och medieteknik (DM)

   Author : Ilya Ploshchik; [2023]
   Keywords : Visualization; interaction; metamodels; validation metrics; predicted probabilities; stacking; stacked generalization; ensemble learning; machine learning;

   Abstract : Stacking, also known as stacked generalization, is a method of ensemble learning where multiple base models are trained on the same dataset, and their predictions are used as input for one or more metamodels in an extra layer. This technique can lead to improved performance compared to single layer ensembles, but often requires a time-consuming trial-and-error process. READ MORE

4. 13. Flight to climate: liquidity commonality in brown equities

   University essay from Stockholms universitet/Företagsekonomiska institutionen

   Author : Haiping Yu; [2023]
   Keywords : ESG; ESG Investing; Climate investing; Liquidity Commonality; Systematic Liquidity Risk;

   Abstract : Emerging ESG studies have established a negative equilibrium correlation between ESG factors and stock returns in an economy predominately influenced by investors with nonpecuniary preference over high ESG credentials. However, little research has delved into a potential systematic liquidity risk phenomenon associated with aggregate trading activities of ESG-motivated investors who share a common nonzero ESG preference component in their utility function. READ MORE

5. 14. Detection of insurance fraud using NLP and ML

   University essay from Lunds universitet/Matematisk statistik

   Author : Rasmus Bäcklund; Hampus Öhman; [2023]
   Keywords : Technology and Engineering;

   Abstract : Machine-Learning can sometimes see things we as humans can not. In this thesis we evaluated three different Natural Language Procces-techniques: BERT, word2vec and linguistic analysis (UDPipe), on their performance in detecting insurance fraud based on transcribed audio from phone calls (referred to as audio data) and written text (referred to as text-form data), related to insurance claims. READ MORE

6. 15. Cybersecurity: Digital Twins in Automotive Industry : The Road Ahead – An Exploratory Study

   University essay from Högskolan Väst/Institutionen för ekonomi och it

   Author : Rossarin Upara; [2023]
   Keywords : Digital Twin; Cybersecurity; Automotive Industry; Digitization; Threat Analysis; Risk Assessment; TARA; Digital Tvilling; Cybersäkerhet; Bilindustrin; Digitalisering; Hotanalys; Riskbedömning; TARA;

   Abstract : The digital twin is a concept that has attracted the attention of both industry and academia in the last decade with the advent of Industry 4.0 and the adoption of future technologies. READ MORE