• 해운
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• no.6 s.17
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• pp.32-33
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• 2005

• Journal of Navigation and Port Research
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• v.36 no.8
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• pp.665-671
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• 2012

A remarshalling is studied as an important operational strategy in an automated container terminal to enhance the productivity of container handling. This means the rearrangements of the containers scattered at a vertical yard block. The dispatching problem for remarshalling is selecting the remarshalling operation considering the available operation time and deciding the operation sequencing to maximize the effectiveness of remarshalling. This study develops the optimal mathematical model for yard crane dispatching problem with mixed integer program and explains dispatching problem using an example. However it is difficult to apply this model to a field problem because of its computational time. Therefore, we compare the representative 5 dispatching rules for real world adaption. In a numerical experiment, maximum weight ratio(MR) rule shows an overall outstanding performance.

• Journal of Intelligence and Information Systems
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• v.11 no.2
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• pp.59-79
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• 2005

Export containers in a container terminal are usually classified into a few weight groups and those belonging to the same group are placed together on a same stack. The reason for this stacking by weight groups is that it becomes easy to have the heavier containers be loaded onto a ship before the lighter ones, which is important for the balancing of the ship. However, since the weight information available at the time of container arrival is only an estimate, those belonging to different weight groups are often stored together on a same stack. This becomes the cause of extra moves, or rehandlings, of containers at the time of loading to fetch out the heavier containers placed under the lighter ones. In this paper, we use machine learning techniques to derive a classifier that can classify the containers into the weight groups with improved accuracy. We also show that a more useful classifier can be derived by applying a cost-sensitive learning technique, for which we introduce a scheme of searching for a good cost matrix. Simulation experiments have shown that our proposed method can reduce about 5$\sim$7% of rehandlings when compared to the traditional weight grouping method.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.65-71
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• 2011

In this paper, the RFID / USN-based ad-hoc network structure is presented for efficient operation of a container terminal yard. Communication between fixed or mobile devices in the container terminal yard is accomplished through the ad-hoc node, to collect the status information of a container in real time. Any outside shipper of the container as well as central server allows to share the status information of a container through ad-hoc communication. In addition, to predict the maximum wireless transmission range of nodes by RFID tag position in the yard, LAODV (Location based AODV) routing protocol is proposed. The validity is proved by performance evaluation via computer simulation.

• Journal of Korean Society of Transportation
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• v.17 no.1
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• pp.159-171
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• 1999

This Paper aims to develop container terminal simulation models for medium and long term decision makings. It first undertakes in-depth survey of literature. finds its shortcomings and suggests some directions for improvement. It then proposes detailed design for the simulation models. Based on this it finally developes several simulation models and applies them to a hypothetical situation of a container terminal development. The results reveal that basic design questions such as length of quay, number of quay crane, size of storage area are well produced through the models.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1079-1081
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• 2011

컨테이너터미널 장치장 내 교차로에서 무인 YT(Yard Tractor)간 충돌방지를 위하여 RFID(Radio Frequency Identification) 태그와 ad-hoc 네트워크를 이용한 교차로 충돌방지 알고리즘을 제안한다. 또한 ad-hoc 네트워크 라우팅 프로토콜은 장치장 교차로에서 충돌방지를 위한 YT 간 통신성능을 결정하는 중요한 요소로써, 장치장 교차로 환경과 YT의 이동성을 고려하여 프로토콜을 결정해야 한다. 따라서 RFID 태그를 이용한 YT 위치정보와 AODV(Ad hoc On demand Distance Vector) 방식의 Hello 메시지를 이용해서 충돌방지를 위한 ad-hoc 네트워크 라우팅 프로토콜을 제안한다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.05a
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• pp.44-51
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• 2005

항만에 위치한 컨테이너 터미널은 수송, 하역, 저장의 기능을 고루 갖춘 대표적인 물류 시스템이다. 터미널이 충분히 제 기능을 수행하여 터미널 생산성을 향상시키기 위해서는 효율적인 레이아웃 설계가 필요하다. 터미널 레이아웃은 초기 터미널 설계단계에서 우선적으로 고려되는 의사결정 부분이며 터미널 운영 및 컨테이너 취급 비용에 중요한 영향을 미치는 요소가 된다. 본 연구에서는 개념 설계에서 구분되어지는 장치장의 배치형태 에서 수평 장치장을 모델로 하였다. 터미널 생산성에 영향을 미치는 이송능력과 적재능력의 효율적인 조정을 위하여, 블록의 배치와 사양에 따른 적재능력과 블록에 설치한 이적지점 개수에 따른 이송능력 대해 시뮬레이션을 통해 분석하고자 한다.

• Journal of Intelligence and Information Systems
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• v.8 no.2
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• pp.71-89
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• 2002

In this paper, an integrated planning system is introduced for the efficient operation of container terminal. It consists of discharging and loading planning, yard planning, and berth scheduling subsystem. This interface of this system is considered for user's convenience, and the rule-based system is suggested and developed in order to make planning with automatic procedures, warning functions for errors.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.129-130
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• 2009

컨테이너 터미널에서 하역작업 생산성은 운영전략과 밀접한 관련이 있다. 본 연구는 수직배치형 컨테이너 터미널을 대상으로 여러 운영전략에 따른 하역생산성의 변화를 살펴보았다. 자가하역이 가능한 ALV 이송시스템을 대상으로 시뮬레이션 모형을 개발하여 하역작업 생산성에 대한 민감도 분석을 수행하였다. 실험에 따르면 수직배치인 경우에 본선작업 물량의 장치장 분산 할당이 중요한 것으로 나타났다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.11a
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• pp.303-307
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• 2004

The scale of ship's cargo transport is getting larger, more economics of scale are gained the speed is higher and the size of quay fundling equipment in container terminal is larger. The productivity cf the quay qffects occupation for limited scale of yard. This paper aims to calculate the yard occupation by handling systems, such as OHBC, RMGC, RTTC, etc, and lay-out.