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Multi-parametric disaggregation technique for global optimization of polynomial...

This paper discusses a power-based transformation technique that is especially useful when solving polynomial optimization problems, frequently occurring in science and engineering. The polynomial nonlinear problem is primarily transformed into a suitable reformulated problem containing new sets of discrete and continuous variables. By applying a term-wise disaggregation scheme combined with multi-parametric el...

Univariate parameterization for global optimization of mixed-integer polynomial...

This paper presents a new relaxation technique to globally optimize mixed-integer polynomial programming problems that arise in many engineering and management contexts. Using a bilinear term as the basic building block, the underlying idea involves the discretization of one of the variables up to a chosen accuracy level (Teles, J.P., Castro, P.M., Matos, H.A. (2013). Multiparametric disaggregation technique fo...

As freguesias do distrito da Guarda. Memória, história e património

Crowdfunding : material incentives and performance

This study addresses a new way to pool financial resources through an open call on the internet – crowdfunding. As this new industry continues to grow and develop, it is important to evaluate its current status and recent developments to try to find clues about the future. The analysis conducted focused on the types of material incentives that crowdfunding platforms use to entice their users to invest and, more...

Biorefineries : a new concept for biomass based industries

As freguesias dos distritos de Aveiro e Coimbra nas Memórias Paroquiais de 1758...

O documento não contém a parte relativa à edição das "Memórias Paroquiais de Aveiro e Coimbra", p. 129-699.

Parametric programming technique for global optimization of wastewater treatmen...

This paper presents a parametric programming technique for the optimal design of industrial wastewater treatment networks (WTN) featuring multiple contaminants. Inspired in scientific notation and powers of ten, the proposed approach avoids the non-convex bilinear terms through a piecewise decomposition scheme that combines the generation of artificial flowrate variables with a multi-parameterization of the out...

As freguesias do distrito de Viseu nas memórias paroquiais de 1758 : memórias, ...

As freguesias do distrito do Porto nas Memórias Paroquiais de 1758 : memórias, ...

O documento não contém a parte relativa à edição das "Memórias Paroquiais de 1758, p. 127-791.

Performance indicators for reactive distillation design

A cost indicator for the design and multi-objective optimization of reactive distillation columns, designated capacity, was introduced in previous work by the authors. The question of this indicator’s effectiveness as a measure of the actual column cost, is herein investigated over a number of designs by comparing it with the value obtained by means of conventional costing procedures. The results show that the ...