Author Type

Graduate Student

Date of Award

2008

Document Type

Thesis

Publication Status

Version of Record

Submission Date

October 2026

Abstract

Collaborative filtering (CF), a very successful recommender system, is one of the applications of data mining for incomplete data. The main objective of CF is to make accurate recommendations from highly sparse user rating data. My contributions to this research topic include proposing the frameworks of imputation-boosted collaborative filtering (IBCF) and imputed neighborhood based collaborative filtering (INCF). We also proposed a model-based CF technique, TAN-ELR CF, and two hybrid CF algorithms, sequential mixture CF and joint mixture CF. Empirical results show that our proposed CF algorithms have very good predictive performances. In the investigation of applying imputation techniques in mining incomplete data, we proposed imputation-helped classifiers, and VCI predictors (voting on classifications from imputed learning sets), both of which resulted in significant improvement in classification performance for incomplete data over conventional machine learned classifiers, including kNN, neural network, one rule, decision table, SVM, logistic regression, decision tree (C4.5), random forest, and decision list (PART), and the well known Bagging predictors. The main imputation techniques involved in these algorithms include EM (expectation maximization) and BMI (Bayesian multiple imputation).

Extent

xv, 139 p. : ill. (some col.).

Comments

by Xiaoyuan Su.|Vita.|Thesis (Ph.D.)--Florida Atlantic University, 2008.|Includes bibliography.|Electronic reproduction. Boca Raton, Fla., 2008. Mode of access: World Wide Web.|by Xiaoyuan Su.

Identifier

FADT186301

Format

pdf

Download

Share

COinS