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Abstract ln this study, an efficient global optill1ization method called the "hybrid optimization method" is proposed. This method cOll1bines a conventional genetic algorithm (GA) as a global optimizer and the method of feasible directions (MFD) as a local optimizer. The gradient information (or design sensitivity) obtained during global iterations by the GA is used for an efficient crossover. After the final global iteration by the GA, local optimization performed by the MFD may be used to further improve upon the final global iteration solution. A comparative test of the proposed hybrid optimization method is performed to evaluate its efficiency and accuracy. Finally, the proposed metnod is applied to a structural design optimization problem and ship design optill1ization problems. These applications showed that the proposed method is very efficient, robust, and reliable.
Publication Date 2002-01-29

Kyu-Yeul Lee, Myung-Il Roh, Hang-Soon Choi, Woo-Jae Seong, "Development of Hybrid Optimization Method and Its Application to Ship Design Optimization", Proceedings of Pacific 2002 International Maritime Conference, Sydney, Australia, pp. 46-55, 2002.01.29-31


List of Articles
번호 분류 제목 Publication Date
81 International Conference Ki-Su Kim, Myung-Il Roh, Seung-Ho Ham, Sol Ha, "An Improved Method for the Evacuation Analysis of a Passenger Ship Considering Intermediate Flooding", Proceedings of PRADS 2022, Dubrovnik, Croatia, 2022.10.09-13 2022-10-09
80 International Conference Ki-Su Kim, Myung-Il Roh, Seung-Min Lee, "Flooding Analysis Based on PBD (Position Based Dynamics) for Ships and Offshore Structures", Proceedings of ISOPE 2018, Sapporo, Japan, pp. 955-957, 2018.06.10-15 file 2018-06-14
79 International Conference Ki-Su Kim, Myung-Il Roh, Sung-Kyoon Kim, "An Arrangement Design Framework for Ships and Offshore Plants Based on Expert System and Optimization Technique", Proceedings of OMAE 2016, Busan, Korea, pp. 1-5, 2016.06.19-24 file 2016-06-20
78 International Conference Ki-Su Kim, Myung-Il Roh, Sung-Min Lee, "A Simultaneous Optimization Method of the Direction and Speed for Ship Route Planning", Proceedings of Smart Ship Technology 2017, London, England, 2017.01.24-25 file 2017-01-25
77 International Conference Ki-Su Kim, Myung-Il Roh, Sung-Min Lee, "Toward a Robust Optimization Method for Ship Route Planning Considering Cost and Safety Aspect", Proceedings of ACDDE 2017, Zhangjiajie, China file 2017-08-26
76 International Conference Ki-Su Kim, Myung-Il Roh, Sung-Min Lee, Jihye Cha, Jongjin Park, DongYeon Lee, Booki Kim, "An Efficient Method for Cost and Risk Saving in Ship Route Planning", Proceedings of the 31st Asian-Pacific TEAM 2017, Osaka, Japan, 2017.09.25-28 file 2017-09-25
75 International Conference Kyu-Yeul Lee, Ju-Hwan Cha, Joon-Chae Lee, Myung-Il Roh, Ji-Hyun Hwang, "Determination of the Optimal Operating Condition of Dual Mixed Refrigerant Cycle at the Pre-FEED Stage of LNG FPSO Topside Liquefaction Process", Proceedings of ISOPE(International Society of Offshore and Polar Engineers) 2011, Maui, USA, pp. 151-158, 2011.06.19-24 file 2011-06-19
» International Conference Kyu-Yeul Lee, Myung-Il Roh, Hang-Soon Choi, Woo-Jae Seong, "Development of Hybrid Optimization Method and Its Application to Ship Design Optimization", Proceedings of Pacific 2002 International Maritime Conference, Sydney, Australia, 2002.01.29-31 file 2002-01-29
73 International Conference Kyu-Yeul Lee, Myung-Il Roh, Ju-Hwan Cha, "Development of a Non-linear Optimization Program and Its Applications to Shipbuilding", Proceedings of the 1st Mongolia-Korea Joint Workshop on CAD/CAM, Ulaanbaatar, Mongolia, pp. 1-5, 2007.07.08-10 file 2007-07-08
72 International Conference Kyu-Yeul Lee, Myung-Il Roh, Sang-Uk Lee, Joong-Hyun Rhim, Seong-Chan Kang, Jong-Hyun Kim, Jeong-Youl Lee, "Development of a Hull Structural CAD System for an Initial Design Stage", Proceedings of International Symposium on PRADS(Practical Design of Ships and Other Floating Structures) 2004, Lubeck Travemunde, Germany, pp. 98-105, 2004.09.12-17 file 2004-09-12
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