Challenging issues in classification problems : sparisty control, key instance detection, and imbalanced data

• Main Author: Liu, Guoqing.
• Other Authors: School of Computer Engineering
• Format: Theses and Dissertations
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Computer science and engineering::Computer applications::Computers in other systems
• Online Access: http://hdl.handle.net/10356/52422
• Institution: Nanyang Technological University

This thesis deals with the difficulties in classification problems caused by three types of sparsity characteristics - feature, label, and instance sparsity. First, feature spar- sity is usually used as prior knowledge by inducing parameter sparsity of the learned model. We show that only an appropr...