EE4047_Part8 - 1 City University of Hong Kong City University of Hong Kong City University of Hong Kong City University of Hong Kong Part 8

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Unformatted text preview: 1 City University of Hong Kong City University of Hong Kong City University of Hong Kong City University of Hong Kong Part 8: Advanced GA Designs (I) Hierarchical Chromosome Structure Biological Inspiration s Regulatory Sequences and Structural Genes A B C structural genes promoter DNA transcription initiation site tran-acting factor mRNA polypeptide transcription translation 2 Biological Inspiration s Exon and Intron TRANSCRIPTION intron loop SPLICING coding sequence TRANSLATION protein intron exon exon promoter Hierarchical Chromosome s A fixed chromosome structure s Consists of two types of genes: Control Genes and Parametric Genes s Provide different phenotype structures … Parametric genes … … First level Control genes Second level Control genes 3 Example 1 s Chromosome A X1 = (4,1,3,8) s Chromosome B X2 = (3,9) 4 7 1 3 8 9 1 1 1 1 4 7 1 3 8 9 1 1 1 1 1 1 4 7 1 3 8 9 1 1 4 7 1 3 8 9 Example 2 s Chromosome A X1 = (4,1) 4 7 1 3 8 9 1 1 1 1 1 4 7 1 3 8 9 1 1 1 1 1 4 Multiobjective s Consider the structure as an objective s Selection with Preferable ranking s Replacement in group: compete with others in the same group f1 f2 1 1 2 4 Example: IIR Filter Design s determination of lowest filter order; s the filter must be stable (the poles must lie inside the unit circle) ; and s the filter must meet the prescribed tolerance settings 5 IIR Filter: Chromosome Design For a typical pulse transfer function ) )( )( ( ) )( )( ( ) ( 12 11 2 2 1 12 11 2 2 1 a z a z a z a z b z b z b z b z K z H + + + + + + + + = 1 a 2 a 11 a 12 a 1 b 2 b 11 b 12 b K 1 a z + 2 a z + 12 11 2 a z a z + + 1 b z + 2 b z + 12 11 2 b z b z + + Each parametric gene expressed in 16-bits 1 bit for one control gene Constraints 1 1 < <- i a-1-1 1 1-2 2 a j1 a...
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This note was uploaded on 01/11/2011 for the course EE 4047 taught by Professor Kitsangtsang during the Fall '09 term at City University of Hong Kong.

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EE4047_Part8 - 1 City University of Hong Kong City University of Hong Kong City University of Hong Kong City University of Hong Kong Part 8

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