19 Dezembro 2019, 09:30 • Pedro Castro
Two-stage MILP/NLP decomposition algorithms for MIQCPs. Spatial brand-and-bound for general problems.
16 Dezembro 2019, 09:30 • Pedro Castro
Mixed-integer quadratically constrained problems (MIQCPs) as an important class of mixed-integer nonlinear programming problems (MINLPs). Relaxation techniques for non-convex bilinear terms: (I) McCormick envelopes (LP relaxation); (ii) Piecewise McCormick envelopes (MILP); (iii) Multiparametric Disaggregation (MILP).
12 Dezembro 2019, 09:30 • Pedro Castro
Difficulties associated to nonlinear problems. NLP formulation for the design of water using networks featuring non-convex bilinear terms in the mass balances.
Implementing and solving the water-using network design problem for a multicontaminant system in Excel.
9 Dezembro 2019, 09:30 • Pedro Castro
Part 3 deals with the minimisation of the total investment cost of the heat exchanger network. The problem can be formulated as a non-convex NLP that is built from a superstructure that includes all heat-exchanger possibilities between any pair of hot and cold streams.
5 Dezembro 2019, 09:30 • Pedro Castro
MILP model to minimize the number of heat exchanger units. Implementation and solution in GAMS for the complete network as well as for the regions above and below the pinch.