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Heuristic-based energy landscape paving for the circular packing problem with performance constraints of equilibrium

Liu, Jingfa; Jiang, Yucong; Li, Gang; Xue, Yu; Liu, Zhaoxia - In: Physica A: Statistical Mechanics and its Applications 431 (2015) C, pp. 166-174

search (LS) procedure, we put forward a hybrid algorithm, denoted by IELP-LS, for the circular packing problem with … current literature. The proposed algorithm breaks the records of all 10 instances in the first set, and achieves the same or … computational results show that the proposed algorithm is an effective method for solving the circular packing problem with …

Persistent link: https://www.econbiz.de/10011264560

Space-Filling Latin Hypercube Designs For Computer Experiments (Revision of CentER DP 2006-18)

van Dam, Edwin Robert; Den Hertog, Dick; Husslage, B.G.M.; … - Tilburg University, Center for Economic Research - 2008

Evolutionary algorithm of Jin et al. (2005), we obtain new results which we compare to existing results. We thus construct a …

Persistent link: https://www.econbiz.de/10011090728

Linear models for the approximate solution of the problem of packing equal circles into a given domain

Galiev, Shamil I.; Lisafina, Maria S. - In: European Journal of Operational Research 230 (2013) 3, pp. 505-514

heuristic algorithm for solving the packing problems based on linear models is proposed. This algorithm makes it possible to …

Persistent link: https://www.econbiz.de/10010871207

Cutting ellipses from area-minimizing rectangles

Kallrath, Josef; Rebennack, Steffen - In: Journal of Global Optimization 59 (2014) 2, pp. 405-437

A set of ellipses, with given semi-major and semi-minor axes, is to be cut from a rectangular design plate, while minimizing the area of the design rectangle. The design plate is subject to lower and upper bounds of its widths and lengths; the ellipses are free of any orientation restrictions....

Persistent link: https://www.econbiz.de/10010994186

One-dimensional nested maximin designs

Dam, Edwin; Husslage, Bart; Hertog, Dick - In: Journal of Global Optimization 46 (2010) 2, pp. 287-306

Persistent link: https://www.econbiz.de/10008591054

Indeterminacy and search theory

Giammarioli, Nicola - European Central Bank - 2003

JEL Classification: E10, E24, J64

Persistent link: https://www.econbiz.de/10005530830

Welfare Differentials and Inequality in the Finnish Labour Market over the 1990s Recession

Kyyrä, Tomi - Valtion taloudellinen tutkimuskeskus (VATT), Government … - 2000

Using a large panel of Finnish males, we study how the recession of the early 1990s hit different worker groups and affected inequality in the labour market. Despite large employment losses the cross-section dispersion of earnings is found be almost constant, while differences in layoff and...

Persistent link: https://www.econbiz.de/10005545813

Estimating Equilibrium Search Models from Finnish Data

Kyyrä, Tomi - Valtion taloudellinen tutkimuskeskus (VATT), Government … - 2001

Empirical equilibrium search models have attracted a growing interest in recent years. Estimation of such models has not been completely successful, however. This has led researchers to develop more sophisticated versions of the models, in an attempt to get a better fit to the data. This study...

Persistent link: https://www.econbiz.de/10005545948

Models as measuring instruments: measurement of duration dependence of unemployment

Rodenburg, Peter - In: Journal of Economic Methodology 12 (2005) 3, pp. 407-431

Nancy Cartwright views models as blueprints for nomological machines - machines that, if properly shielded, generate law-like behaviour or regularities. Marcel Boumans has argued that we can look for devices inside models, which enable us to measure aspects of these regularities. Therefore, if...

Persistent link: https://www.econbiz.de/10005496110

Search Unemployment with Advance Notice

Garibaldi, Pietro - C.E.P.R. Discussion Papers - 1999

This paper proposes and solves a search unemployment model in which job separation requires mandatory notice. When jobs are subject to idiosyncratic uncertainty, firms would issue advance notice even with good business conditions. We show that such precautionary policy is not pursued if it...

Persistent link: https://www.econbiz.de/10005497907