Tapio Westerlund

According to our database, Tapio Westerlund authored at least 33 papers between 1979 and 2022.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2022

The supporting hyperplane optimization toolkit for convex MINLP.

Andreas Lundell, Jan Kronqvist, Tapio Westerlund

J. Glob. Optim., 2022

2019

A center-cut algorithm for quickly obtaining feasible solutions and solving convex MINLP problems.

Jan Kronqvist, David E. Bernal, Andreas Lundell, Tapio Westerlund

Comput. Chem. Eng., 2019

2018

On solving generalized convex MINLP problems using supporting hyperplane techniques.

Tapio Westerlund, Ville-Pekka Eronen, Marko M. Mäkelä

J. Glob. Optim., 2018

Reformulations for utilizing separability when solving convex MINLP problems.

Jan Kronqvist, Andreas Lundell, Tapio Westerlund

J. Glob. Optim., 2018

Solving global optimization problems using reformulations and signomial transformations.

Andreas Lundell, Tapio Westerlund

Comput. Chem. Eng., 2018

2017

Method for solving generalized convex nonsmooth mixed-integer nonlinear programming problems.

Ville-Pekka Eronen, Jan Kronqvist, Tapio Westerlund, Marko M. Mäkelä, Napsu Karmitsa

J. Glob. Optim., 2017

2016

The extended supporting hyperplane algorithm for convex mixed-integer nonlinear programming.

Jan Kronqvist, Andreas Lundell, Tapio Westerlund

J. Glob. Optim., 2016

2014

New methods for calculating α BB-type underestimators.

Anders Skjäl, Tapio Westerlund

J. Glob. Optim., 2014

2013

A reformulation framework for global optimization.

Andreas Lundell, Anders Skjäl, Tapio Westerlund

J. Glob. Optim., 2013

Improved Discrete Reformulations for the Quadratic Assignment Problem.

Axel Nyberg, Tapio Westerlund, Andreas Lundell

Proceedings of the Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems, 2013

2012

A Generalization of the Classical αBB Convex Underestimation via Diagonal and Nondiagonal Quadratic Terms.

Anders Skjäl, Tapio Westerlund, Ruth Misener, Christodoulos A. Floudas

J. Optim. Theory Appl., 2012

A new exact discrete linear reformulation of the quadratic assignment problem.

Axel Nyberg, Tapio Westerlund

Eur. J. Oper. Res., 2012

2011

A Comparative Study of Solving Quadratic Assignment Problems using Some Standard MINLP Solvers.

Toni Lastusilta, Tapio Westerlund

Proceedings of the SIMULTECH 2011 - Proceedings of 1st International Conference on Simulation and Modeling Methodologies, Technologies and Applications, Noordwijkerhout, The Netherlands, 29, 2011

2010

A linear programming-based optimization algorithm for solving nonlinear programming problems.

Claus Still, Tapio Westerlund

Eur. J. Oper. Res., 2010

2009

Sequential Cutting Plane Algorithm.

Claus Still, Tapio Westerlund

Proceedings of the Encyclopedia of Optimization, Second Edition, 2009

Extended Cutting Plane Algorithm.

Claus Still, Tapio Westerlund

Proceedings of the Encyclopedia of Optimization, Second Edition, 2009

MINLP: Trim-loss Problem.

Iiro Harjunkoski, Ray Pörn, Tapio Westerlund

Proceedings of the Encyclopedia of Optimization, Second Edition, 2009

Convex underestimation strategies for signomial functions.

Andreas Lundell, Tapio Westerlund

Optim. Methods Softw., 2009

Some transformation techniques with applications in global optimization.

Andreas Lundell, Joakim Westerlund, Tapio Westerlund

J. Glob. Optim., 2009

2008

Global solution of optimization problems with signomial parts.

Ray Pörn, Kaj-Mikael Björk, Tapio Westerlund

Discret. Optim., 2008

2007

A MILP model for N-dimensional allocation.

Joakim Westerlund, Lazaros G. Papageorgiou, Tapio Westerlund

Comput. Chem. Eng., 2007

2006

A sequential cutting plane algorithm for solving convex NLP problems.

Claus Still, Tapio Westerlund

Eur. J. Oper. Res., 2006

Solving Convex MINLP Optimization Problems Using a Sequential Cutting Plane Algorithm.

Claus Still, Tapio Westerlund

Comput. Optim. Appl., 2006

2005

An epsilon-accurate model for optimal unequal-area block layout design.

Ignacio Castillo, Tapio Westerlund

Comput. Oper. Res., 2005

Optimization of block layout design problems with unequal areas: A comparison of MILP and MINLP optimization methods.

Ignacio Castillo, Joakim Westerlund, Stefan Emet, Tapio Westerlund

Comput. Chem. Eng., 2005

2004

Comparisons of solving a chromatographic separation problem using MINLP methods.

Stefan Emet, Tapio Westerlund

Comput. Chem. Eng., 2004

2003

Some convexifications in global optimization of problems containing signomial terms.

Kaj-Mikael Björk, Per Olov Lindberg, Tapio Westerlund

Comput. Chem. Eng., 2003

2002

Solving a large-scale industrial scheduling problem using MILP combined with a heuristic procedure.

Janne Roslöf, Iiro Harjunkoski, Tapio Westerlund, Johnny Isaksson

Eur. J. Oper. Res., 2002

1998

Different transformations for solving non-convex trim-loss problems by MINLP.

Iiro Harjunkoski, Tapio Westerlund, Ray Pörn, Hans Skrifvars

Eur. J. Oper. Res., 1998

1991

An elementary derivation of the maximum likelihood estimator of the covariance matrix, and an illustrative determinant inequality.

Seppo Karrila, Tapio Westerlund

Autom., 1991

1984

Constrained linear quadratic gaussian control with process applications.

Pertti M. Mäkilä, Tapio Westerlund, Hannu T. Toivonen

Autom., 1984

1979

Reply by toivonen and westerlund.

Hannu T. Toivonen, Tapio Westerlund

Autom., 1979

Comments on self-tuning regulator applied to a binary distillation column.

Hannu T. Toivonen, Tapio Westerlund

Autom., 1979