• Login
    View Item 
    •   Home
    • RIVM official reports
    • RIVM official reports
    • View Item
    •   Home
    • RIVM official reports
    • RIVM official reports
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    RIVM Publications RepositoryCommunitiesTitleAuthorsIssue DateSubmit Date

    My Account

    LoginRegister

    Statistics

    Display statistics

    Uncertainty analysis for NOx emissions from Dutch passenger cars in 1998. Applying structured expert elicitation and distinguishing different types of uncertainty

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    550002004.pdf
    Size:
    1.147Mb
    Format:
    PDF
    Download
    Average rating
     
       votes
    Cast your vote
    You can rate an item by clicking the amount of stars they wish to award to this item. When enough users have cast their vote on this item, the average rating will also be shown.
    Star rating
     
    Your vote was cast
    Thank you for your feedback
    Authors
    Oorschot MMP van
    Kraan BCP
    Brink RMM van den
    Janssen PHM
    Cooke RM
    Series/Report no.
    RIVM rapport 550002004
    Type
    Report
    Language
    en
    
    Metadata
    Show full item record
    Title
    Uncertainty analysis for NOx emissions from Dutch passenger cars in 1998. Applying structured expert elicitation and distinguishing different types of uncertainty
    Translated Title
    Onzekerheidsanalyse van de NOx emissie van Nederlandse personenauto's in 1998
    Publiekssamenvatting
    In decision-making processes on emission reduction, not only are emission data needed but also information on the uncertainty of these data. Here, structured expert elicitation was used an uncertainty analysis on NOx emissions from Dutch passenger cars in 1998. Experts from several Dutch research institutes were elicited on individual car performance (emission factors) and volumetric (kilometres driven) variables could be obtained with the expert elicitation method. Total population uncertainty was calculated by propagation and aggregation of individual car uncertainty in a Monte Carlo simulation. The calculation process was explicitly geared to variables showing inherent variability (aleatory uncertainty) and variables that are uncertain because of a lack of knowledge (epistemic uncertainty). The smallest 95% uncertainty interval for total population NOx emission was obtained for the TNO-CBS (Statistics Netherlands) expert (-12% to +15%), while the largest interval was obtained for the RIVM expert (-35% to +51%). The combination of experts (called decision-makers [DM]) showed intervals of -30% to +41% (DM before propagation) and -46% to +81% (DM after aggregation). The use of structured expert elicitation was very time consuming, and there is still a lot of discussion on combining expert data. Therefore, the need for structured expert elicitation should be firmly substantiated and focused on sensitive and controversial variables.
    Bij besluitvorming over maatregelen op het gebied van emissie-reductie zijn niet alleen gegevens over emissies nodig maar ook over de onzekerheid daarvan. Dit rapport beschrijft een studie naar het gebruik van gestructureerde expertbevraging bij onzekerheidsanalyse van de NOx-emissies uit personenauto's. Experts van verschillende Nederlandse onderzoeksinstituten zijn bevraagd over prestatiegegevens (emissie-factoren) en volumegegevens (kilometrages). De totale populatie onzekerheid is berekend door het opschalen van de onzekerheid van individuele auto's door Monte Carlo simulaties. In de berekening is expliciet onderscheid gemaakt tussen variabelen die inherent variabel zijn (aleatorische onzekerheid) en variabelen die onzeker zijn vanwege een gebrek aan kennis (epistemische onzekerheid). Het kleinste 95% betrouwbaarheidsinterval werd verkregen voor de TNO-CBS expert (-12% tot +15%), en het grootste interval voor de RIVM expert (-35% tot +51%). De combinatie van experts (decision-makers [DM] genoemd in deze methode) kreeg intervallen van -30% tot +41% (DM voor propagatie) en van -46% tot +81% (DM na aggregatie). Het gebruik van expert bevraging bleek arbeidsintensief en er is veel discussie over het wel of niet combineren van expert antwoorden. Het gebruik van deze methode moet daarom goed onderbouwd worden, en moet zich richten op de meest gevoelige en controversiele parameters.
    Publisher
    Rijksinstituut voor Volksgezondheid en Milieu RIVM
    URI
    http://hdl.handle.net/10029/8974
    Collections
    RIVM official reports

    entitlement

     

    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.