Search results for "Mixed mode"

showing 2 items of 72 documents

An evolutionary approach to multi-objective scheduling of mixed model assembly lines

1999

In this paper a multi-objective genetic algorithm for the scheduling of a mixed model assembly line is proposed, pursuing the line stop time minimisation together with the component usage smoothing. Specific features of the developed GA are step by step random selection of diversified crossover and mutation operators, population control for the substitution of duplicate chromosomes, and in-process updating of GA control parameters. Three different formulation of the fitness function were been tested with some distinct line configurations.

Mixed modelMutation operatorEngineeringMixed Model assembly line; Multiobjective scheduling; Genetic algorithmFitness functionMixed Model assembly lineGeneral Computer Sciencebusiness.industryCrossoverGeneral EngineeringGenetic algorithmMultiobjective schedulingStop timeControl parametersAssembly linebusinessAlgorithmSmoothing
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A recap on Linear Mixed Models and their hat-matrices

2017

This working paper has a twofold goal. On one hand, it provides a recap of Linear Mixed Models (LMMs): far from trying to be exhaustive, this first part of the working paper focusses on the derivation of theoretical results on estimation of LMMs that are scattered in the literature or whose mathematical derivation is sometimes missing or too quickly sketched. On the other hand, it discusses various definitions that are available in the literature for the hat-matrix of Linear Mixed Models, showing their limitations and proving their equivalence.

Hat matriceComputer scienceMatrix algebra resultsLMMInference02 engineering and technologyToo quickly01 natural sciencesGeneralized linear mixed model010104 statistics & probability0202 electrical engineering electronic engineering information engineeringApplied mathematics020201 artificial intelligence & image processing0101 mathematicsEquivalence (measure theory)
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