### Summary

• #### A hybrid evolutionary approach to intelligent system design ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
The problem of developing a general methodology for system design has always been demanding. For this purpose, an evolutionary algorithm, adapted with design-specific representation data structures is devised. The ...
• #### Weighted sums of aggregation operators ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
he aim of this work is to investigate when a weighted sum, or in other words, a linear combination, of two or more aggregation operators leads to a new aggregation operator. For weights belonging to the real unit interval, ...
• #### BL-algebras of basic fuzzy logic ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
BL-algebras [7] rise as Lindenbaum algebras from certain logical axioms familiar in fuzzy logic framework. BL-algebras are studied by means of deductive systems and co-annihilators. Duals of many theorems known to hold ...
• #### Boolean structure of triangular forms ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
In this note results obtained by S.Ray (1997) on representation of a Boolean algebra by its triangular norms are generalized.
• #### Capital budgeting problems with fuzzy cashflows ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
We consider the {\em internal rate of return} (IRR) decision rule in capital budgeting problems with fuzzy cash flows. The possibility distribution of the IRR at any $r\geq0$,is defined to be the degree of possibility ...
• #### Fuzzy max-min classifiers decide locally on the basis of two attributes ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
Fuzzy classification systems differ from fuzzy controllers in the form of their outputs. For classification problems a decision between a finite number of discrete classes has to be made, whereas in fuzzy control the output ...
• #### Evolutionary design of fuzzy logic controllers using strongly-typed GP ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
An evolutionary approach to the design of fuzzy logic controllers is presented in this paper. We propose the use of the genetic programming paradigm to evolve fuzzy rule-bases (internally represented as type-constrained ...
• #### An example of the knowledge based controller-design and evaluation ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Article
Open Access
Knowledge based controller for a balance control model is presented in this paper. The design of the controller was based on the human control of the same process. Developed controller is tested by means of simulation and ...
• #### Editorial [ New editorial line and format] ﻿

(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 1999)
Review
Open Access