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Toulon, France

Yilbas B.S.,King Fahd University of Petroleum and Minerals | Akhtar S.S.,King Fahd University of Petroleum and Minerals | Bayraktar E.,SUPMECA LISMMA | Gasem Z.,King Fahd University of Petroleum and Minerals
Advanced Materials Research

Laser cutting of aluminum-silicon sheet is carried out. The influence of laser output power on the kerf width is examined in details. The lump parameter analysis is introduced to predict the kerf width size. The percentage of kerf width size variation due to different laser output power levels is formulated. It is found that the kerf width size predicted agrees well with the experimental data. The influence of laser output power on the kerf width size is more pronounced for power levels ≤ 350 W. © (2012) Trans Tech Publications. Source

Martins A.F.,Arts et Metiers ParisTech | Costa Affonso R.,SUPMECA LISMMA | Tamayo S.,MINES ParisTech | Lamouri S.,Arts et Metiers ParisTech | Baldy Ngayo C.,HEC Paris
Proceedings of 2015 International Conference on Industrial Engineering and Systems Management, IEEE IESM 2015

In an increasingly volatile, globalized, and demanding market, Lean is the differential factor that could increase companies' competitiveness and efficiency. In spite of the abundant literature addressing Lean system's technical aspects, there has been little discussion on the importance of national culture in Lean's implementation process. It has been proven that the implementation of lean practices do not always produce the intended results and national culture has been highlighted as one of the contextual variables that may explain the success or failure of Lean practices. Since companies are influenced by the culture of the country where they're located, some comparative advantages may occur due to their location, making it necessary to adjust Lean's implementation process to national culture. The purpose of this article is to propose a literature review to examine the relationship between national culture and Lean Management. This study explores the assertions and/or contradictions found in the literature regarding the cultural dimensions that may act as enablers or withholders to the lean principles and practices. © 2015 International Institute for Innovation, Industrial Engineering and Entrepreneurship - I4e2. Source

Paviot T.,Arts et Metiers ParisTech | Cheutet V.,SUPMECA LISMMA | Lamouri S.,Arts et Metiers ParisTech
International Journal of Product Lifecycle Management

Wide diffusion of methodologies and software relevant to product lifecycle management (PLM) in industrial companies faces heterogeneity of information technology (IT) systems. Especially, the lack of interoperability between product data management (PDM) systems, that drive virtual product development, and enterprise resource planning (ERP), which manages real product, cannot lead to a global description of the product development process. We demonstrate that a mediator approach is pertinent for the coordination of these two systems. The use of open standards, and more precisely STEP Application Protocol 239, known as product lifecycle support (PLCS), allows overcoming issues related to semantic part of this interoperability. The last part of the study focuses on implementation issues, in order to develop an interoperability framework based upon a consistent product data model, whether the viewpoint is from the design or logistics businesses. Copyright © 2011 Inderscience Enterprises Ltd. Source

ICED 11 - 18th International Conference on Engineering Design - Impacting Society Through Engineering Design

After demonstrating the feasibility of the inversion of a ship emission model with the CSP approach [1], we will now discuss about the optimization of emissions. In a first time, a single-objective approach with an aggregation function of the emissions will be used, then, it will be a multi-objective approach and the Pareto frontier will be computed. The objective of this paper is triple: first, to show that a full ship model, linking a propulsion model and an emission model, can be inverted. Then, to bring to light that a propulsion system can be sized by an approach minimizing the emissions and using an aggregate function. Finally, to demonstrate that, in this case, computing the Pareto frontier provides the same global optimum as the mono-objective approach. Copyright © 2002-2012 The Design Society. All rights reserved. Source

Larroude V.,SUPMECA LISMMA | Chenouard R.,Ecole Centrale Nantes | Yvars P.-A.,SUPMECA LISMMA | Millet D.,SUPMECA LISMMA
Engineering Applications of Artificial Intelligence

When the steady states are largely predominant with respect to transitional phases, steady-state simulation seems sufficient to predict the behavior of a complex system. Over the past 20 years, different modeling languages and dedicated tools have been developed to improve steady state simulation. In this paper, focus is made on steady-state simulation for system control and design. A model combining an emission sub-model with a ship propulsion sub-model was implemented in a constraint programming (CP) approach. It will help to determine the efficiency (i.e. the ability to model and solve the problem) and complexity of implementation (i.e. difficulties encountered during the implementation) of this approach. First, requirements for the steady-state simulation of complex systems are defined. Then, CP approach is shown to be able to answer these issues through experiments. This approach is then compared to one of the main simulation languages: Modelica. Although the two approaches (i.e Modelica and CP) are able to reverse models, the study shows that the use of Modelica principles for steady-state simulation involves some crippling limitations, such as the non-management of under/over-constrained systems, or inequalities. This study also shows that the constraint programming approach permits to meet some needs for steady-state simulation not yet covered by current approaches. © 2012 Elsevier Ltd. All rights reserved. Source

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