Sequence Modeling for Vessels Sailing Through One-Way Channel

• Main Authors: Lin, Yu-Li, 林于立
• Other Authors: Kuo, Tu-Cheng
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/75187864507556648908

碩士 === 長榮大學 === 航運管理學系碩士班 === 100 === The planning of the sequence of ship’s sailing in- and- out of the port currently is done by staffs of VTS (Vessel Traffic Service) system. Such a sequencing way done manually is not scientific. Therefore, Kuo, etc.,(2007) proposed a sequencing model for that task. Due to lack of taking into consideration of ship’s maneuver practice, Kuo’s model is not of practical utility. Xu,etc.,(2008) aimed to refine Kuo’s model. He used different weights to reveal ship’s maneuver characteristics. Based on a sample of 13 ships sailing in- and- out of Kaoshiung port , the outcomes of the sequencing model are superior to that of man-made. Xu’s model uses the known segmental traverse time of each ship to compute the likely start time and the likely finish time of each ship in the sample, which in turn, works out the optimal sequence. However, the segmental traverse time of each ship are unknown random variables. So, the superiority of Xu’s model need to be examined further. In addition, the constraints coming from the tugboat are not taken into consideration. Kuo, etc.,(2012) added constraints in relative to tugboat operations into the sequencing model. However, The beginning time of the current run and the finishing time of the immediately previous run of the same tugboat is not linked correctly. This leads to a biased results. This study firstly revise Kuo’s model especially aiming at constraints in relative to tugboats operations. Then generate psedo segmental traverse time of each ship by simulation approach and construct sequencing models case by case. Finally, the outputs of the sequencing model are revised with the true segmental traverse time and are compared with outcomes of the man-made sequences. A sample collected on 6 Feb. 2012, from Kaoshiung Port, shows that the revised solutions of sequencing model based on unknown segmental traverse time of ship are still better than that of man-made.