Seminars

The series hosts a seminar every other week on current research topics. The seminar often features an invited guest speaker and occasionally local faculty members, students or others affiliated with the department. The usual time of the seminar is 3:30-4:30 pm on Fridays. Professors Tatiyana V Apanasovich ([email protected]), Qing Pan ([email protected]) and Emre Barut ([email protected] ) are the Seminar Series Coordinators.


Upcoming Seminar

Date: Friday, March 30th, 11:00am-12:00pm

Location: Duques Hall, Room 152

Title: Nonparametric Tolerance Tubes for Tracking Functional Data

Speaker: Regina Y. Liu, Rutgers, Statistics

Abstract: Tolerance intervals and tolerance regions are important tools for process monitoring or statistical quality control of univariate and multivariate data, respectively. We discuss their generalization to tolerance tubes in the infinite dimensional setting for functional data. In addition to the generalizations of the commonly accepted definitions of the tolerance level of beta-content or beta-expectation, we introduce the new definition of alpha-exempt beta-expectation tolerance tube. The latter loosens the definition of beta-expectation tolerance tube by allowing alpha (pre-set using domain knowledge) portion of each functional be exempt from the requirement. Those proposed tolerance tubes are completely nonparametric and broadly applicable. We discuss their general properties, and show that the alpha exempt beta-expectation tolerance tube is particularly useful in the setting where occasional short term aberrations of the functional data are deemed acceptable (or unpreventable) and they do not cause substantive deviation of the norm. This desirable property is elaborated further and illustrated with both simulations and real applications in continuous monitoring of blood glucose level in diabetes patients as well as of aviation risk patterns of aircraft landings. This is joint work with Dr. Yi Fan, Amazon.com, Inc. 

The talk will be live-streamed at http://go.gwu.edu/statsseminar