• Date A CUSO Seminar in University of Fribourg, 25 to 26 May 2018
  • Location Boulevard de Pérolles 90, Fribourg, room B205


Lotfi Zadeh, the father of fuzzy logic, coined the phrase "computing with words" (CWW) to describe a methodology in which the objects of computation are words and propositions drawn from a natural language. Perceptual Computing explains how to implement CWW to aid in the important area of making subjective judgments, using a methodology that leads to an interactive device—a "Perceptual Computer"—that propagates random and linguistic uncertainties into the subjective judgment in a way that can be modeled and observed by the judgment maker.

This seminar focuses on the three underlying components of a Perceptual Computer—encoder, CWW engines, and decoder—and then provides detailed applications for each. It uses interval type-2 fuzzy sets (IT2 FSs) and fuzzy logic as the mathematical vehicle for perceptual computing, because such fuzzy sets can model first-order linguistic uncertainties whereas the usual kind of fuzzy sets cannot. Drawing upon the work on subjective judgments that Jerry Mendel and his students completed over the past decade, this seminar gives a short intro to

  • Map word-data with its inherent uncertainties into an IT2 FS that captures uncertainties
  • Use uncertainty measures to quantify linguistic uncertainties
  • Compare IT2 FSs by using similarity and rank
  • Compute the subsethood of one IT2 FS in another such set
  • Aggregate disparate data, ranging from numbers to uniformly weighted intervals to nonuniformly weighted intervals to words
  • Aggregate multiple-fired IF-THEN rules so that the integrity of word IT2 FS models is preserved


  • Jerry M. Mendel Jerry M. Mendel is Professor Emeritus of Electrical Engineering at the University of Southern California. A Life Fellow of the IEEE and a Distinguished Member of the IEEE Control Systems Society, Mendel is also the recipient of many awards for his diverse research, including the IEEE Centennial Medal, the Fuzzy Systems Pioneer Award from the IEEE Computational Intelligence Society, and the IEEE Third Millennium Medal.

Course material

The course material as for instance the reading list may be downloaded here.


All the students, researchers and professors registered at CUSO universities (i.e. EPFL, Universities of Fribourg, Geneva, Lausanne, Bern and Neuchâtel) are eligible to apply. Priority will be given to PhD students; PostDocs and senior researchers will be selected according to their scientific activity and closeness to the topic of the seminar. For members of the CUSO, we will reimburse travel costs for half-price second class SBB tickets up to CHF 30. You will receive reimbursement instructions during the school. Registration is open until May 25, 2018.

Please register directly through CUSO.


900am - 1200am 1200am - 130pm 130pm - 300pm
Friday 25th of May Course Lunch Course
Saturday 26th of May Course - -


  • Prof. Edy Portmann, University of Fribourg, Switzerland