Dear Dr. Manfred,
I am very interested.
Could you send me one.
Thanks.
Best regards, Dr. Mohd. Nor
[log in to unmask] wrote:
> Dear list-members,
>
> Some of you may be interested in a recent PhD
> thesis, which is summarised below. In case there
> is sufficient interest, a reprint will be
> considered (see end of this message).
>
> Best regards
>
> Manfred Schuetze
>
> ------------------------------------------------------------------------
>
> "INTEGRATED SIMULATION AND OPTIMUM CONTROL OF THE URBAN
> WASTEWATER SYSTEM"
>
> PhD thesis by Manfred Schuetze
> Supervisors: Professor Bruce Beck; Dr. David Butler
> Imperial College of Science, Technology and Medicine; University
> of London; United Kingdom
>
> Only recently have attempts been made to consider the sewer
> system, treatment plant and receiving water body as one integral
> system (the urban wastewater system - UWWS), rather than to
> consider them separately as individual parts. The main aim of
> this thesis is to consider whether and if so, to what extent,
> integrated control of the UWWS is superior to conventional
> control (i.e. control which does not consider the wastewater
> system in its entirety).
>
> The thesis begins with a review of water quantity and quality
> processes in sewer system, treatment plant and river and of
> related modelling approaches. Furthermore, control of urban
> wastewater systems and mathematical optimisation techniques are
> reviewed. In order to achieve the objective of this thesis, an
> innovative integrated simulation tool ("SYNOPSIS") was assembled
> from existing models and adapted to the particular needs of this
> project. The models used are described and problems with their
> mutual compatibility are discussed. Due to its architecture
> this simulation tool allows information from all parts of the
> urban wastewater system to be considered when taking a control
> decision.
>
> Since most other optimisation approaches require substantial
> model simplifications, this study follows an "off-line"
> optimisation approach. Optimisation is carried out to establish
> optimum (or, at least, sufficiently good) parameters of control
> strategies. Strategies are represented by sets of rules and
> parameters of controllers. Since few assumptions can be made
> about the objective function, which describes impacts of the
> settings of the strategy parameters on river water quality, two
> global optimisation procedures (Genetic Algorithm, Controlled
> Random Search) were implemented and linked to the simulation
> tool. The underlying ideas and characteristics of these methods
> are described, analysed and discussed in the thesis.
> Furthermore, a local optimisation method is applied and
> discussed.
>
> Application of these tools and methods to a semi-hypothetical
> case-study site is carried out for different control scenarios
> with various degrees of sophistication. Results suggest that an
> improvement of river water quality can be obtained by integrated
> control, with the degree of improvement of river water quality
> depending on the particular control scenario and the case study
> site.
>
> In addition to the discussion of results for the
> semi-hypothetical case study, also various issues of relevance
> to the application of the simulation and optimisation procedure,
> such as the sensitivity of solutions and the influence of
> various characteristics of the case study site on the potential
> of integrated control, are briefly discussed, before suggestions
> for future research are given.
>
> (450+iv pp.; Costs: approximately GBP 25/EUR 35; Discount for CEE
> countries; Enquiries to: Dr Manfred Schuetze: Department of
> Civil and Environmental Engineering; Imperial College of Science,
> Technology and Medicine; London SW7 2BU; United Kingdom;
> Email: [log in to unmask])
>
> ------------------------------------------------------------------------
> ************************************************************************
> Dr Manfred Schuetze
> Department of Civil and Environmental Engineering
> Imperial College of Science, Technology and Medicine
> London SW7 2BU
> United Kingdom
> Tel.: +44-171-5946020 / 5946018
> Fax: +44-171-2252716
> Email: [log in to unmask]
> ************************************************************************
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