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  • Uncertainties-Related Publications
    asymptotic variances are computed which shows the benefit of an adaptive controlled stratification method This method is finally applied to a real example computation of the peak cladding temperature during a large break loss of coolant accident in a nuclear reactor Adaptive sparse polynomial chaos expansions for uncertainty propagation and sensitivity analysis G Blatman PhD Thesis Université Blaise Pascal Clermont Ferrand II This thesis takes place in the context of uncertainty propagation and sensitivity analysis of computer simulation codes for industrial application It is aimed at carrying out such probabilistic studies while minimizing the number of model evaluations which may reveal time consuming The present work relies upon the expansion of the model response onto the polynomial chaos PC basis which allows the analyst to perform post processing at a negligible cost However fitting the PC expansion may require a high number of calls to the model if the latter depends on a large number of input parameters say more than 10 To circumvent this problem two algorithms are proposed in order to select only a low number of significant terms in the PC approximation namely a stepwise regression scheme and a procedure based on Least Angle Regression LAR Both approaches eventually provide PC representations with a small number of coefficients which may be computed using a reduced number of model evaluations The methods are first tested and compared on various academic examples Then they are applied to the industrial problem of the assessment of a pressure vessel of a nuclear powerplant The obtained results show the efficiency of the proposed procedures to carry out uncertainty and sensitivity analysis of high dimensional problems Quantifying uncertainty in an industrial approach an emerging consensus in an old epistemological debate E de Rocquigny S A P I EN S 2 1 2009 Uncertainty

    Original URL path: http://www.opus-project.fr/index.php/aroundopus/publications?el_mcal_month=4&el_mcal_year=2016 (2016-01-11)
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  • Contributions
    to use existing objects Development when the conception is done the development starts It consists in the implementation of the objects and algorithms Opus has a set of development rules that should be followed in all cases but must be followed if the contribution is to be integrated at the Opus Lib level See the Programming Rules guide and following articles for more detail Test cases and unitary validation this step is required in order to demonstrate that the development is correct Each object and methods should be tested and validated with comparisons with analytical methods or reference methods Documentation of the development a documentation of the development is required in order to secure the development and its maintainability There are several types of documentation Reference documentation it contains the mathematical basis of the method developed It is based on the structured mathematical description Architecture documentation it describes the architecture of the different objects developed and their link with the existing version of the library User manual it contains the description of the objects the inputs and outputs of their methods Use case guide it contains a simple use case of the method There are three levels of contribution in Opus detailed in the following articles Opus Lib Basically contributing to the Opus lib means contributing to the core of the software Details Opus Contrib the set of all packages added to Opus that are not a part of Opus Lib Details Opus Forum this website provides among other things a forum available to the community for the purpose of discussing planning or proposing Details Test cases while not a contribution level per se industrial test cases are important additions to the project Details Last Updated Tuesday 05 January 2010 01 45 Contribution Overview Monday 04 January 2010 21 38 Author Administrator This article aims at presenting the various ways in which one can contribute to the Opus platform In a few words Opus is an uncertainty treatment platform giving access to Many advanced mathematical features The possibility of easily interacting with big codes via wrappers The availability of different languages to access or add to the features C Python R Scilab that is either compiled code or scripts A community of cutting edge scientists from many prestigious entities see consortium members built around a website and forum The possibility for the users to provide features for the software contributions Opus is built on the basis of the opensource software Openturns which is also an uncertainty treatment platform The next article describes the various levels of integration at which one can contribute based on the architecture In a few words there are three levels of integration from least to most integrated Opus Forum The contributor uses the forum space available in the OPUS web site to discuss and propose features or ideas in a completely free way from a simple algorithm to a bit of code or even a complete module albeit incompatible with other OPUS contributions Scripts articles commentaries

    Original URL path: http://www.opus-project.fr/index.php/contributionmain?start=5&el_mcal_month=4&el_mcal_year=2016 (2016-01-11)
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  • Contributions
    to use existing objects Development when the conception is done the development starts It consists in the implementation of the objects and algorithms Opus has a set of development rules that should be followed in all cases but must be followed if the contribution is to be integrated at the Opus Lib level See the Programming Rules guide and following articles for more detail Test cases and unitary validation this step is required in order to demonstrate that the development is correct Each object and methods should be tested and validated with comparisons with analytical methods or reference methods Documentation of the development a documentation of the development is required in order to secure the development and its maintainability There are several types of documentation Reference documentation it contains the mathematical basis of the method developed It is based on the structured mathematical description Architecture documentation it describes the architecture of the different objects developed and their link with the existing version of the library User manual it contains the description of the objects the inputs and outputs of their methods Use case guide it contains a simple use case of the method There are three levels of contribution in Opus detailed in the following articles Opus Lib Basically contributing to the Opus lib means contributing to the core of the software Details Opus Contrib the set of all packages added to Opus that are not a part of Opus Lib Details Opus Forum this website provides among other things a forum available to the community for the purpose of discussing planning or proposing Details Test cases while not a contribution level per se industrial test cases are important additions to the project Details Last Updated Tuesday 05 January 2010 01 45 Contribution Overview Monday 04 January 2010 21 38 Author Administrator This article aims at presenting the various ways in which one can contribute to the Opus platform In a few words Opus is an uncertainty treatment platform giving access to Many advanced mathematical features The possibility of easily interacting with big codes via wrappers The availability of different languages to access or add to the features C Python R Scilab that is either compiled code or scripts A community of cutting edge scientists from many prestigious entities see consortium members built around a website and forum The possibility for the users to provide features for the software contributions Opus is built on the basis of the opensource software Openturns which is also an uncertainty treatment platform The next article describes the various levels of integration at which one can contribute based on the architecture In a few words there are three levels of integration from least to most integrated Opus Forum The contributor uses the forum space available in the OPUS web site to discuss and propose features or ideas in a completely free way from a simple algorithm to a bit of code or even a complete module albeit incompatible with other OPUS contributions Scripts articles commentaries

    Original URL path: http://www.opus-project.fr/index.php/contributionmain?el_mcal_month=11&el_mcal_year=2015&start=5 (2016-01-11)
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  • Other resources
    to adopt face to risks a preventive approach as to correctly identify evaluate quantify order and manage feared events This approach aims to be systemic and global OpenTurns OpenTURNS is an Open source initiative to T reat U ncertainties R isks N S tatistics in a structured industrial approach Since the beginning of 2005 a partnership of three companies has been working on building together a tool designed to perform uncertainty treatment and reliability analyses SFDS french site La Société Française de Statistique SFdS s est donné pour mission de promouvoir l utilisation de la statistique et sa compréhension de favoriser ses développements méthodologiques Last Updated Wednesday 13 January 2010 03 37 Contact coordinator webmaster Sunday 22 November 2009 20 20 Author Administrator Project coordinator PASANISI Alberto EDF R D This e mail address is being protected from spambots You need JavaScript enabled to view it EDF R D Dépt MRI 6 quai Watier 78401 Chatou Tél 01 30 87 80 85 Webmaster PAIR Pierre Matthieu Softia This e mail address is being protected from spambots You need JavaScript enabled to view it Softia 9 ter rue Carnot 94270 Le Kremlin Bicêtre Tél 09 74 76 21 77 Fax 09 74 76 04 21 Last Updated Monday 04 January 2010 20 42 Project members address book Sunday 22 November 2009 20 19 Author Administrator NAME First Name Entity Webpage Physical address ANTONIADIS Anestis UJF LJK LJK 51 rue des Mathématiques BP53 38041 Grenoble Cedex 9 BAUDIN Michael INRIA Scilab Scilab Domaine de Voluceau Bât 23 Bureau 2 78153 Le Chesnay BERVEILLER Marc EDF R D EDF R D Dépt MMC Av des Renardières Ecuelles 77818 Moret sur Loing CAGNAC Albannie EDF R D EDF R D Dépt MRI 6 quai Watier 78401 Chatou CHAVANCE Clément Softia Softia 9 ter rue

    Original URL path: http://www.opus-project.fr/index.php/otherresources?el_mcal_month=4&el_mcal_year=2016 (2016-01-11)
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  • Contact – Opus Project
    Version Last Change Version 3 modified by pmpair 6 years ago Contact Coordinateur du projet PASANISI Alberto EDF R D alberto pasanisi EDF R D Dépt MRI 6 quai Watier 78401 Chatou Tél 01 30 87 80 85 Webmaster PAIR Pierre Matthieu Softia pmpair Softia 9 ter rue Carnot 94270 Le Kremlin Bicêtre Tél 09 74 76 21 77 Fax 09 74 76 04 21 Retour Download in other formats

    Original URL path: http://www.opus-project.fr/trac/wiki/Contact?version=3 (2016-01-11)
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  • Contact – Opus Project
    Version Last Change Version 2 modified by pmpair 6 years ago Contact Coordinateur du projet PASANISI Alberto EDF R D alberto pasanisi EDF R D Dépt MRI 6 quai Watier 78401 Chatou Tél 01 30 87 80 85 Webmaster PAIR Pierre Matthieu Softia pmpair Softia 9 ter rue Carnot 94270 Le Kremlin Bicêtre Tél 09 74 76 21 77 Fax 09 74 76 04 21 Download in other formats Plain

    Original URL path: http://www.opus-project.fr/trac/wiki/Contact?version=2 (2016-01-11)
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  • Contact – Opus Project
    Previous Version View Latest Version Next Version Last Change Version 1 modified by pmpair 6 years ago Contact Coordinateur du projet Alberto Pasanisi EDF Webmaster Pierre Matthieu Pair Softia Download in other formats Plain Text Powered by Trac 0 11

    Original URL path: http://www.opus-project.fr/trac/wiki/Contact?version=1 (2016-01-11)
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  • Registered Area
    Workshops info registration Publications uncertainties Formations Forum Contribution Overview Contribution process How to contribute Available contributions Joining the consortium Other resources Private website Project address book Contact Links Download Opus file Registered Area Welcome to the registered user area of our site Calendar February 2016 Mo Tu We Th Fr Sa Su 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

    Original URL path: http://www.opus-project.fr/index.php/component/user/?el_mcal_month=2&el_mcal_year=2016 (2016-01-11)
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