### IEEE World Congress on Computational Intelligence
WCCI'2008

International Conference on Fuzzy Systems
FUZZ-IEEE'2008

Hong Kong, China,
June 1-6, 2008

### Special Session:

Inter-Relation Between Interval and Fuzzy Techniques

**Motivations:** The relation between fuzzy and interval techniques is
well known; e.g., due to the fact that a fuzzy number can be
represented as a nested family of intervals (alpha-cuts),
level-by-level interval techniques are often used to process fuzzy
data.
At present, researchers in fuzzy data processing mainly used interval
techniques originally designed for non-fuzzy applications,
techniques which are often taken from textbooks and are, therefore,
already outperformed by more recent and more efficient methods.

One of the main objectives of the proposed special session is to make
the fuzzy community at-large better acquainted with the latest, most efficient
interval techniques, especially with techniques specifically developed
for solving fuzzy-related problems.

Another objective is to combine fuzzy and interval techniques, so that
we will be able to use the combined techniques in (frequent)
practical situations where both types of uncertainty are present: for
example, when some quantities are known with interval uncertainty (e.g.,
coming from measurements), while other quantities are known with fuzzy
uncertainty (coming from expert estimates).

**Scope:** The session will include all aspects of
relations between interval and fuzzy techniques, including:

- the use of interval techniques to process fuzzy data - the use
motivated by the fact that a fuzzy number can be represented as
a nested family of intervals, and fuzzy data processing can be
described as processing the corresponding intervals
layer-by-layer
- theory and applications of interval-valued fuzzy sets
- general applications combining interval and fuzzy information
- results and algorithms from interval mathematics that are of
potential use in fuzzy applications
- challenging application-motivated open problems related to the
relation between interval and fuzzy techniques, including the
problems related to the need to go beyond interval-valued fuzzy
sets, for example:
- to more general second-order fuzzy sets, and
- to techniques combining interval, fuzzy, and other types of
uncertainty (probabilistic, rough sets, etc.).

**Deadline for Submissions:** December 15, 2007.

**How to Submit:** Please follow instructions from the “Submission”
section of the WCCI'2008 website.
When submitting, indicate that your paper is intended for the Interval
Special Session (our session's code is FS02).

**Organizer:**
Vladik Kreinovich,
email vladik@utep.edu