In this paper, the ability of fuzzy systems is used to estimate the solution of crisp

optimal control problems. To solve an optimal control problem, first the well-known Euler–

Lagrange conditions are obtained ...

This paper introduces the concept of fuzzy projection of a fuzzy number

on a set of fuzzy numbers based onr-cut approach. It is proved that the projection of

a fuzzy number on the set of all fuzzy numbers is ...

This paper presents a new approach for projecting a fuzzy number over a crisp closed convex set.

Based on this approach, a kind of fuzzy linear projection equation is introduced and also it is used to solve a fuzzy ...

In this paper, a general production-inventory optimal control system is proposed which can be used in most cases that might arise in the theory of production-inventory control. The proposed general form is considered and ...

The aim of this paper is to describe a new optimal control model for optimal inventory control along with reworking items and forecasting the demand. The proposed model contains two stocks, one for serviceable products and ...

This paper, attempts to propose a new multi-stage production-inventory system with and

without lead-times via an optimal control model. The proposed optimal control model for

lead-times contains some delays ...

This paper proposes bounds for the objective function of convex quadratic programming problem (QPP) in general form. The method uses just the eigenvalues of the Hessian matrix. By use of the eigenvalues of the Hessian ...