Susara Van den Heever

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A multiperiod MINLP model for offshore oilfield infrastructure planning is presented where nonlinear reservoir behavior is incorporated directly into the formulation. Discrete decisions include the selection of production platforms, well platforms and wells to be installed/drilled, as well as the drilling schedule for the wells over the planning horizon.(More)
The need for improvement in process operations, logistics and supply chain management has created a great demand for the development of optimization models for planning and scheduling. In this paper we first review the major classes of planning and scheduling models that arise in process operations, and establish the underlying mathematical structure of(More)
In this paper, we present a general disjunctive multiperiod nonlinear optimization model, which incorporates design, as well as operation and expansion planning, and takes into account the corresponding costs incurred in each time period. This model is formulated with the use of logic and disjunctive programming, and includes Boolean variables for design,(More)
We propose a bidder aid tool that will allow bidders to more effectively participate in combinatorial FCC spectrum auctions by enabling concise expression of preferences. In addition to logical relationships between items, bidders may express spectrum-specific preferences such as those related to minimum population coverage, bandwidth, and budget. The tool(More)
We present a bidder aid tool that allows bidders to more effectively participate in combinatorial FCC spectrum auctions by enabling concise expression of preferences. In addition to logical relationships between items, bidders may express spectrum-specific preferences such as those related to minimum population coverage, bandwidth, and budget. The tool can(More)
Chapter 3 of this volume describes the ascending proxy auction mechanism of Ausubel and Milgrom (2002), and presents its proven desirable economic properties. However, major obstacles arise in its practical implementation. The primary implementation obstacles are that the mechanism requires a bidder explicitly to enumerate all combinations of interest (for(More)
Multiperiod optimization models for design and planning in the chemical industry have received considerable attention in recent years. In this paper, we present a general multiperiod Mixed Integer Nonlinear Programming (MINLP) model, which incorporates design, as well as operation and expansion planning, and takes into account the investment costs,(More)