Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2020Scopus SJRQ1/r/munzur/3311
  Robotic disassembly line balancing problem: A mathematical model and ant colony optimization approach

  Çil, Zeynel Abidin; Mete, Suleyman; Serin, Faruk

  The use of robots is significantly increasing day by day in manufacturing systems, and especially improving the efficiency of the lines. Robots can be used to complete disassembly tasks, and each of the robots can need different operation times to perform the tasks. In this paper, the balancing of the robotic disassembly line problem has been studied to develop efficient solution techniques. Firstly, a mixed-integer linear mathematical model is proposed to determine and solve the problem optimally. A case study from literature is addressed to assess and show the efficiency and effectiveness of the model to minimize cycle time. Secondly, a heuristic algorithm based on ant colony optimization is also proposed to discover a solution for especially the large-size test problems due to the complexity of the problem. The performance of the proposed heuristic algorithm is verified and compared with the different heuristic on data sets. The computational results indicate that the proposed mathematical model and the algorithms are promising for the small and large-size test problems, respectively. Finally, it should be stated that robots have great potential to use in the area of disassembly line and useful solutions provide according to test results.

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• MakaleAçık Erişim2011Scopus SJRQ1/r/munzur/4893
  Geometric network simulation of high porosity foods

  Gueven, A.; Hicsasmaz, Z.

  Solid foods are formed of a network of air cells distributed within a solid matrix. Size of air cells and how they are interconnected influence moisture sorption, thermal conductivity, aroma retention and texture of cellular foods. Available geometric pore structure models widely used in petroleum reservoir engineering, soil science, and catalysis are for low porosity (<= 0.4) materials. However, food materials generally have higher porosities (0.5-0.9). Microstructure of cookie (porosity = 0.54) and bread (porosity = 0.90) samples were simulated using the one-dimensional (1-D) corrugated pore model. Model parameters were: Unit cell dimensions; number of capillary segments, number of diameter sub-ranges, geometric placement of capillary segments in the unit cell; capillary segment length, and the seed number in random number generation. Accurate simulation of porosity depended on number of corrugated pores, and thus the number of diameter sub-ranges in the unit cell. For the cookie sample, a cubic unit cell that was able to accommodate more than a single capillary segment in a unit square and 3 diameter sub-ranges gave realistic results. Simulation of the bread crumb required a similar cubic unit cell arrangement with 12 diameter sub-ranges. (C) 2011 Elsevier Inc. All rights reserved.

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