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Packing congruent hyperspheres into a hypersphere
Stoyan, Yuriy; Yaskov, Georgiy - In: Journal of Global Optimization 52 (2012) 4, pp. 855-868
Persistent link: https://www.econbiz.de/10010845822
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Exact and heuristic methods for placing ships in locks
Verstichel, J.; De Causmaecker, P.; Spieksma, F.C.R.; … - In: European Journal of Operational Research 235 (2014) 2, pp. 387-398
constraints. These constraints make the ship placement problem different from traditional 2D bin packing. A mathematical …
Persistent link: https://www.econbiz.de/10010744208
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Approximations for two variants of the Steiner tree problem in the Euclidean plane <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$${\mathbb{R}^2}$$</EquationSource> </Inl...
Li, Jianping; Wang, Haiyan; Huang, Binchao; Lichen, Junran - In: Journal of Global Optimization 57 (2013) 3, pp. 783-801
Given n terminals in the Euclidean plane and a positive constant l, find a Steiner tree T interconnecting all terminals with the minimum total cost of Steiner points and a specific material used to construct all edges in T such that the Euclidean length of each edge in T is no more than l. In...
Persistent link: https://www.econbiz.de/10010994113
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Cooling dominated Hybrid Ground Source Heat Pump System application
Sagia, Z.; Rakopoulos, C.; Kakaras, E. - In: Applied Energy 94 (2012) C, pp. 41-47
required pressure drop per packing height of cooling tower for four packings in different operating conditions. …
Persistent link: https://www.econbiz.de/10011040343
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Iterated tabu search for the circular open dimension problem
Fu, Zhanghua; Huang, Wenqi; Lü, Zhipeng - In: European Journal of Operational Research 225 (2013) 2, pp. 236-243
This paper investigates the circular open dimension problem (CODP), which consists of packing a set of circles of known …
Persistent link: https://www.econbiz.de/10011052401
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A column generation heuristic for the two-dimensional two-staged guillotine cutting stock problem with multiple stock size
Furini, Fabio; Malaguti, Enrico; Medina Durán, Rosa; … - In: European Journal of Operational Research 218 (2012) 1, pp. 251-260
We consider a two-dimensional cutting stock problem where stock of different sizes is available, and a set of rectangular items has to be obtained through two-staged guillotine cuts. We propose a heuristic algorithm, based on column generation, which requires as its subproblem the solution of a...
Persistent link: https://www.econbiz.de/10011052417
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Optimization of column width in website layout for advertisement fit
Marszałkowski, Jakub; Drozdowski, Maciej - In: European Journal of Operational Research 226 (2013) 3, pp. 592-601
Advertising is the basic source of income for many web businesses. Preparing website layout for the advertisements is a problem faced by many web designers. The ads and other content are placed in several columns. Usually column widths are chosen ad hoc to fit the widest advertising unit. To...
Persistent link: https://www.econbiz.de/10011052683
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Constraints in container loading – A state-of-the-art review
Bortfeldt, Andreas; Wäscher, Gerhard - In: European Journal of Operational Research 229 (2013) 1, pp. 1-20
Container loading is a pivotal function for operating supply chains efficiently. Underperformance results in unnecessary costs (e.g. cost of additional containers to be shipped) and in an unsatisfactory customer service (e.g. violation of deadlines agreed to or set by clients). Thus, it is not...
Persistent link: https://www.econbiz.de/10011052729
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Experimental investigation of the hydraulic characteristics of a counter flow wet cooling tower
Lemouari, M.; Boumaza, M.; Kaabi, A. - In: Energy 36 (2011) 10, pp. 5815-5823
characteristics of a counter flow wet cooling tower. The tower contains a “VGA.” (Vertical Grid Apparatus) type packing which is 0 … between the pressure drop characteristics and the combined heat and mass transport (air–water) through the packing inside the …
Persistent link: https://www.econbiz.de/10011053284
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Dynamic reduction heuristics for the rectangle packing area minimization problem
He, Kun; Ji, Pengli; Li, Chumin - In: European Journal of Operational Research 241 (2015) 3, pp. 674-685
The rectangle packing area minimization problem is a key sub-problem of floorplanning in VLSI design. This problem … transforms an instance of the original problem to a series of instances of the rectangle packing problem by dynamically … candidate placements, and we propose a least injury first approach for solving the rectangle packing problem. Next, we …
Persistent link: https://www.econbiz.de/10011117481