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  • Analytical Chemistry and Spectroscopy  (1)
  • design problems  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of optimization theory and applications 32 (1980), S. 135-149 
    ISSN: 1573-2878
    Keywords: Multiobjective optimization ; efficiency ; facilities design ; design problems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract An example of design might be a warehouse floor (represented by a setS) of areaA, with unspecified shape. Givenm warehouse users, we suppose that useri has a known disutility functionf isuch thatH i(S), the integral off iover the setS (for example, total travel distance), defines the disutility of the designS to useri. For the vectorH(S) with entriesH i(S), we study the vector minimization problem over the set {H(S) :S a design} and call a design efficient if and only if it solves this problem. Assuming a mild regularity condition, we give necessary and sufficient conditions for a design to be efficient, as well as verifiable conditions for the regularity condition to hold. For the case wheref iis thel p-distance from warehouse docki, with 1〈p〈∞, a design is efficient if and only if it is essentially the same as a contour set of some Steiner-Weber functionf λ=λ1 f 1+⋯+λ m f m ,when the λ i are nonnegative constants, not all zero.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 2 (1979), S. 11-14 
    ISSN: 0935-6304
    Keywords: Liquid chromatography ; Fluorescence ; Ion-pair extraction ; Amines ; Post-column reaction ; Auto-analyser ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A detection system is described which is based on fluorescent ion-pair formation between tertiary amine drugs and dimethoxyanthracene sulphonate. A dynamic micro-extraction principle is then used to isolate the ion-pairs from the excess reagent. The band broadening of this extraction detector was kept below 20% using standard auto-analyser equipment. With the enhanced selectivity and sensitivity of this approach it was possible to analyse chloropheniramine in urine at ppb concentrations using a pre-column clean-up trace enrichment step.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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