Sökning: "square matrix"

Visar resultat 16 - 20 av 47 uppsatser innehållade orden square matrix.

1. 16. CONSTRUCTION EQUIPMENT FUEL CONSUMPTION DURING IDLING : Characterization using multivariate data analysis at Volvo CE

   Uppsats för yrkesexamina på avancerad nivå, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

   Författare :Mujtaba Hassani; [2020]
   Nyckelord :Idling condition; environmental effect; diesel fuel; machine learning; multivariate data analysis; partial least square regression; support vector machine regression; principal component analysis; principal component regression; correlation coefficient matrix; artificial neural network; exhaust emission reduction techniques; global warming; emission regulation; CO2 estimation techniques; Gaussian process regression;

   Sammanfattning : Human activities have increased the concentration of CO2 into the atmosphere, thus it has caused global warming. Construction equipment are semi-stationary machines and spend at least 30% of its life time during idling. The majority of the construction equipment is diesel powered and emits toxic emission into the environment. LÄS MER

3. 17. Recommender System for Gym Customers

   Master-uppsats, Linköpings universitet/Statistik och maskininlärning

   Författare :Roshni Sundaramurthy; [2020]
   Nyckelord :Recommender system; collaborative filtering; matrix factorization; sparse matrix; latent semantic analysis; singular value decomposition; alternating least square; Bayesian personalized ranking; logistic matrix factorization; stochastic gradient descent; AUC metric; mean average precision; normalized discounted cumulative gain; Rekommendationssystem;

   Sammanfattning : Recommender systems provide new opportunities for retrieving personalized information on the Internet. Due to the availability of big data, the fitness industries are now focusing on building an efficient recommender system for their end-users. This thesis investigates the possibilities of building an efficient recommender system for gym users. LÄS MER

4. 18. Covariance Matrix Regularization for Portfolio Selection: Achieving Desired Risk

   Master-uppsats, Lunds universitet/Matematisk statistik

   Författare :Manu Upadhyaya; [2020]
   Nyckelord :covariance matrix; portfolio selection; risk; Mathematics and Statistics;

   Sammanfattning : The modus operandi of most asset managers is to promise clients an annual risk target, where risk is measured by realized standard deviation of portfolio returns. Moreover, Markowitz (1952) portfolio selection requires an estimate of the covariance matrix of the returns of the financial instruments under consideration. LÄS MER

5. 19. Customer segmentation of retail chain customers using cluster analysis

   Master-uppsats, KTH/Matematisk statistik

   Författare :Sebastian Bergström; [2019]
   Nyckelord :Cluster analysis; customer segmentation; tEIGEN; MCLUST; K-means; NMF; Silhouette; Davies-Bouldin; big spenders; statistics; applied mathematics; unsupervised learning; Klusteranalys; kundsegmentering; tEIGEN; MCLUST; K-means; NMF; Silhouette; Davies-Bouldin; storkonsumenter; statistik; tillämpad matematik;

   Sammanfattning : In this thesis, cluster analysis was applied to data comprising of customer spending habits at a retail chain in order to perform customer segmentation. The method used was a two-step cluster procedure in which the first step consisted of feature engineering, a square root transformation of the data in order to handle big spenders in the data set and finally principal component analysis in order to reduce the dimensionality of the data set. LÄS MER

7. 20. Application of machine learning in 5G to extract prior knowledge of the underlying structure in the interference channel matrices

   Master-uppsats, KTH/Matematisk statistik

   Författare :Danilo Peng; [2019]
   Nyckelord :Machine learning; 5G; interference channel; blind source estimation; MIMO; OFDM; bandwidth prediction; support vector machines; artificial neural network.; Maskininlärning; 5G; interferencekanal; stödvektormaskin; neurala nätverk; brandbedd estimering;

   Sammanfattning : The data traffic has been growing drastic over the past few years due to digitization and new technologies that are introduced to the market, such as autonomous cars. In order to meet this demand, the MIMO-OFDM system is used in the fifth generation wireless network, 5G. LÄS MER