Alexandre Sava

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This note is the on-line companion of our paper [2] that proposes a simulation-based optimization approach for discrete optimization of stochastic discrete event systems for which both the performance function and the constraint function are not known but can be evaluated by simulation and the solution space is either finite or unbounded. Numerical results(More)
In this paper, we propose an new algorithm based on an estimation of distribution (ED) to solve the type II assembly line balancing problem (ALBP-II). This problem aims to assign a set of assembly operations subject to precedence constraints to a given number of workstations of an assembly line in order to minimize the cycle time. We prove that the optimal(More)
This paper presents a control synthesis approach for Discrete Event Systems (DES) modeled by Timed Place Marked Graphs TPMG where the time is associated with places. It solves a forbidden state problems characterized by Marking Exclusion Constraint (MEC). A computationally efficient technique to build the supervisor is proposed, which we take in(More)
The research work presented in this paper deals with resources allocation in a production system in order to meet a given production specification. More precisely, we focus on human resources optimisation in design phase of a manufacturing system. We consider that operators may have different qualifications. A highly qualified operator is more expensive,(More)
This paper proposes an approach of hybrid Petri nets modeling for hybrid renewable energy production systems structured in micro-grids. This approach is original in the sense that it enables to study the behavior of such systems under various reconfiguration constraints in order to fulfill energy demands for customers. The proposed Petri net model allows to(More)
The authors propose a methodology to assess the effectiveness of a maintenance strategy on the availability of a serial-parallel multi-physic system, using Monte Carlo simulation embedded in a Petri net model. The systems are composed of heterogenous components that are characterized by specific degradations and failure mechanisms. Building an effective(More)
We have already presented a contribution for synthesizing an approach of supervisory control for Discrete Event Systems (DES) modeled by Timed Place Marked Graphs subject to Marking Exclusion Constraint. This paper is a continuation work in this area for building the control law for Discrete Event Systems (DES), where the time is taken in consideration. It(More)
We propose a computationally feasible method for planning teams of robots based on linear temporal logic specifications. The approach is based on constructing a coarser description for each robot, and then using existing algorithms for solving the problem. Unlike the existing computationally intensive framework dedicated to similar problems, our solution is(More)
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