Interior point SQP strategies for structured process optimization problems

Smoothing methods for complementarity problems in process engineering

“…The interior-point Ž . method described in Albuquerque et al 1997 could be considered as a special class of smoothing methods, for the solution of the complementarity problem in the solution of the KKT conditions. The third section presents several formulations that substitute for nondifferentiable functions and involve smoothing functions.…”

“…Ž . In related work Albuquerque et al, 1997 , we investigated the applicability of interior point methods to overcome the computational complexity associated with active-set methods to process optimization. To summarize, primal᎐dual interior Ž .…”

Transient Modeling and Simulation of a Multiple‐Stage Evaporator in the Paper Industry

“…The expression of the energy balance equations for the 6th and 7th stages are modified due to the presence of the feed split and feed preheater operations and are expressed as in Eqs. (25) and (26).…”

“…In the case of primal-dual IPOPT, the Newton method is used to find the search direction and obtain a new optimum point to execute the next iteration of linear programs. This provides the flexibility of using large step lengths while ensuring global convergence [26]. After forming the objective function, it is solved by using IPOPT solver in the GAMS environment to perform the optimization.…”