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Subject: search.filters.subject.Design of experiments

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    Material structure selection of blue organic light emitting diodes utilizing a hybrid experimental design
    (2016-08-12)
    Shie, Jie Ren
    ;
    Chittawanij, Apisit
    ;
    Hong, Lin Ann
    ;
    Lai, Chang Jun
    ;
    Lai, Yun Jr
    A hybrid approach integrating a Taguchi orthogonal table with an irregular design of experiments (DOE) method was proposed for selecting an optimal material structure of blue organic light emitting diodes in order to achieve multi-objective quality characteristics of devices. Analysis of variance (ANOVA) was adopted to identify significant factors before regression models were obtained. Finally, an optimal material structure was determined by maximizing a desirability function relating to selected critical quality characteristics including the driving voltage, the luminance, and luminance efficiency.
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    Estimation of kinetic parameters for the reactor model of the phthalic anhydride production by the design of experiments
    (2015-04-25)
    Sethapokin, Pinthep
    ;
    Kunatippapong, Siripoln
    ;
    Lothongkum, Anchaleeporn Waritswat
    Heterogeneous reactor model was developed to predict product, by-product and hot spot temperature in an industrial fixed bed reactor of phthalic anhydride production. This work modified the Calderbank's kinetic model by including the reaction from o-xylene to by-product maleic anhydride. The kinetic parameters appropriating to the catalyst in this study were estimated by the design of experiments. The reactor model was validated by comparing the simulated results with the production data in terms of the outlet molar flow rates of phthalic anhydride and maleic anhydride, and the hot spot temperature. The results were less than 1.8% deviated.
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    Production process improvement using the six sigma DMAIC methodology: A case study of a laser computer mouse production process
    (2013-12-01)
    Pimsakul, S.
    ;
    Somsuk, N.
    ;
    Junboon, W.
    ;
    Laosirihongthong, T.
    This paper aims to improve a production process of a laser computer mouse by using the Six Sigma DMAIC Methodology. This study focuses on the functional test procedure because of its lowest yield. The regression analysis and two-level factorial design of experiments is employed in order to determine the optimal conditions of parameters. By operating under these resulting conditions, yield of the functional test procedure increases from 96.2 to 98.6%. © 2013 Springer-Verlag Berlin Heidelberg.