Directory Calendar News Careers Alumni Giving

Events Calendar


Biostatistics Dissertation Defense

Zhiguang Huo: "Statistical Integrative Omics Methods for Disease Subtype Discovery"

Thursday 3/30 1:00PM - 3:00PM
Public Health 7139

Zhiguang Huo of the Department of Biostatistics defends his dissertation on "Statistical Integrative Omics Methods for Disease Subtype Discovery"

Graduate faculty of the University and all other interested parties are invited to attend.


Disease phenotyping by omics data has become a popular approach that potentially can lead to better-personalized treatment. Identifying disease subtypes via unsupervised machine learning is the first step towards this goal. With the accumulation of massive high-throughput omics data sets, omics data integration is essential to improve statistical power and reproducibility. In this thesis, two extensions from sparse K-means method will be introduced. The first extension is towards a meta-analytic framework to identify novel disease subtypes when expression profiles of multiple cohorts are available. The lasso regularization and meta-analysis identify a unique set of gene features for subtype characterization. An additional pattern matching reward function guarantees consistent subtype signatures across studies. The second extension is towards integrating multi-level omics datasets with the guidance of prior biological knowledge via sparse overlapping group lasso. An algorithm using alternating direction method of multiplier (ADMM) will be applied for fast optimization. For both topics, simulation and real applications in breast cancer and leukemia will show the superior clustering accuracy, feature selection and functional annotation. These methods will improve statistical power, prediction accuracy and reproducibility of disease subtype discovery analysis.

Last Updated On Friday, March 17, 2017 by Valenti, Renee Nerozzi
Created On Friday, February 24, 2017

Recent Events

Get a look at recent events at Pitt Public Health.

Find events by department

Use "Find an Event" above to filter this list of  all Pitt Public Health events, or follow the links below to view by department:

Submit events & news

Submit your events and news items for display on Pitt Public Health's Web calendars, Weekly Update, and LCD screens at

Tips & Tricks for entering calendar events

© 2017 by University of Pittsburgh Graduate School of Public Health

Login  |  Sitemap