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Flaus J.-M.,CNRS Laboratory of Sciences for Design, Optimization and Production
Advances in Safety, Reliability and Risk Management - Proceedings of the European Safety and Reliability Conference, ESREL 2011 | Year: 2012

Lack of formal modelling methodologies for risk analysis is a problem for improving the quality of risk analysis, for knowledge capitalization and for a full exploitation of the results. In this paper, we present an approach for systemic modeling of complex systems suited for model driven risk based analysis. This methodology provides a framework for modelling the system under analysis, and the result of the analysis. This framework may be used to perform a model based risk analysis with a classical approaches such as FMEA, PHA, HAZOP in order to get more consistent analysis and to allow knowledge capitalization. © 2012 Taylor & Francis Group. Source


Moinet M.,Laboratoire dIngenierie des Systemes Mecaniques et des MAteriaux EA 2336 | Mandil G.,CNRS Laboratory of Sciences for Design, Optimization and Production | Serre P.,Laboratoire dIngenierie des Systemes Mecaniques et des MAteriaux EA 2336
CAD Computer Aided Design | Year: 2014

This paper proposes a new tool for decision support to address geometric over-constrained problems in Computer Aided Design (CAD). It concerns the declarative modeling of geometrical problems. The core of the coordinate free solver used to solve the Geometric Constraint Satisfaction Problem (GCSP) was developed previously by the authors. This research proposes a methodology based on Michelucci's witness method to determine whether the structure of the problem is over-constrained. In this case, the authors propose a tool for assisting the designer in solving the over-constrained problem by ensuring the consistency of the specifications. An application of the methodology and tool is presented in an academic example. © 2013 Elsevier Ltd. All rights reserved. Source


Benabid F.,CNRS Laboratory of Sciences for Design, Optimization and Production
Specialty Optical Fibers, SOF 2014 | Year: 2014

We give a historical perspective on the major results that led to the advent of the photonic bandgap guiding hollow core photonic crystal fiber (PBG HC-PCF) and to that of inhibited-coupling one (IC HC-PCF). We review the progress made on gas-filled HC-PCF and photonic microcells, along with their applications for coherent optics, Raman comb generation laser metrology, discharge based lasers and high field optics. © 2014 OSA. Source


Khalaf R.E.H.,CNRS Laboratory of Sciences for Design, Optimization and Production | Penz B.,CNRS Laboratory of Sciences for Design, Optimization and Production
Journal of Intelligent Manufacturing | Year: 2010

To design an efficient product family, designers have to anticipate the production process and, more generally, the supply chain costs. But this is a difficult problem, and designers often propose a solution which is subsequently evaluated in terms of logistical costs. This paper presents a design problem in which the product and the supply chain design are considered at the same time. It consists in selecting a set of modules that will be manufactured at distant facilities and then shipped to a plant close to the market for final, customized assembly under time constraints. The goal is to obtain the bill of materials for all the items in the product family, each of which is made up of a set of modules, and specifying the location where these modules will be built, in order to minimize the total production costs for the supply chain. The objective of the study is to analyze both, for small instances, the impact of the costs (fixed and variable) on the optimal solutions, and to compare an integrated approach minimizing the total cost in one model with a two-phases approach in which the decisions relating to the design of the products and the allocation of modules to distant sites are made separately. © 2009 Springer Science+Business Media, LLC. Source


Obeid J.,CNRS Physical Eletrochemistry Materials and Interfaces Lab | Flaus J.-M.,CNRS Laboratory of Sciences for Design, Optimization and Production | Adrot O.,CNRS Laboratory of Sciences for Design, Optimization and Production | Magnin J.-P.,CNRS Physical Eletrochemistry Materials and Interfaces Lab | Willison J.C.,CNRS Chemistry and Biology of Metals Laboratory
International Journal of Hydrogen Energy | Year: 2010

This paper addresses the problem of estimating the states of an anaerobic photosynthetic process used for biohydrogen production by the photosynthetic bacterium Rhodobacter capsulatus. The process is described by a non-linear, time-discrete model and the state estimation is solved using an observer based on the Moving-Horizon State Estimation Method (MHSE). This approach is based on the minimization of a criterion (a non-linear function), in this case, the difference between the estimated output and the measured output of the system over a considered time horizon, where the solution is computed by using a numerical interval method. The observer was successfully applied to hydrogen production by R. capsulatus strain B10 in a batch process. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved. Source

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