• Journal of Intelligence and Information Systems
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• v.12 no.4
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• pp.91-107
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• 2006

This study introduces a software system for supporting the engineering process of container terminals. The design procedure consists of data input, capacity requirements, alternative design, alternative evaluation, and results output. In order to design and evaluate alternatives rapidly, a set of libraries for container terminals was developed. The libraries consist of Wharf, Yard, TravellingArea, and Gate. The architecture of the set of libraries was designed by an object-oriented approach. Various types of container terminal models can be constructed by using a user friendly interface, the CAD based environment, and the combinations of the elements of the libraries. Alternative models can be evaluated by a simulation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.17 no.8
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• pp.779-788
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• 1992

The Input /output (I /0) subsystem is often the bottleneck in high performance computer system. Generally, system performance evaluation models were enhanced to include the effect of the I/0 system. In this paper, we modeled the terminal servers which are Indispensable devices In distribution of computer resources. We use M /M /1 Queueing model for find out the point of the system performance FIFO buffer sizes In the terminal server arc the Important fanctions of the system design and could be effected to the overall system functions. We have proposed the of optimal buffer sizes in the model of terminal server for increasing the system performance. We analizing the vatting time for terruanl server using Queueing model. and We find out the reference model result from simulation.

• Journal of Intelligence and Information Systems
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• v.14 no.3
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• pp.77-86
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• 2008

This study presents a method for estimating the productivity of the ship operation in container terminal. The productivity of the ship operation is influenced by the specifications of each piece of equipment and layouts of the terminal, and the operational strategies. The handling equipments considered in this study are QC(Quay Crane), RMGC (Rail mounted gantry crane), and Transporter (TR). The simulation experiments are conducted to estimate the QC productivity based on the change of the design factors.

• The KIPS Transactions:PartA
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• v.10A no.5
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• pp.519-528
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• 2003

Container terminals need decisions in the course of daily-24 hour and 365 day - operations, and all these decisions are inter-related. The ultimate goal of Decision Support System is to minimize ship loading/unloading time, resources used to handle the workload, and congestion on the roads inside the terminal. It is also to make the best possible use of the storage space available. Therefore, the necessity of decision support tools are emphasized to enhance the operational efficiency of container shipping terminals more, because of limits and complexity of these decisions. So, in thia paper, we draw evaluation items for Decision Support Systems and suggest optimization strategy of evaluation items which have the greatest influence on Decision Support system, that is, yard stacking allocation, RTGC deployment among blocks, and YT allocation to QCs. We also estimate the efficiency of Decision Support System design by simulation using G2 language, comparing ship loading/unloading time.

• Journal of Navigation and Port Research
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• v.44 no.3
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• pp.181-186
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• 2020

Until now, the development of design and operation model for automated container terminals has been mainly performed based on the western ports model, specializing in basic loading, and discharging operations. In the case of the Busan port, terminal operators provide basic stevedoring, as well as an additional logistics service known as 'On Dock Service' not suitable for the currently commercialized automated container terminal model. This study diagnosed the current Busan port's throughput structure and terminal operational characteristic, and proposed a modified perpendicular layout container terminal transport model named 'Interchange Transport Model' for effective management of empty container and operation costs. Although the 'Interchange Transport Model' requires an additional number of transport equipment (AGV), concerning operational efficiency and cost saving, a simulation showed 22% reduction of TAT and 9.4% reduction of annual terminal operational costs in comparison to the basic perpendicular layout model.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.1
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• pp.345-352
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• 2006

The purpose of this paper is to evaluate the efficiency of two yard layout of HSS at container terminal, one is that the container yard blocks are placed horizontally in parallel with berth, the other is that the yard blocks are arranged vertically in perpendicular to the berth. In stevedoring system of container terminal, stacking and transport performance are influenced according to block arrangement type of yard. Therefore, efficient design that can improve stacking and transport performance is required. In this paper, we compared their efficiency of two block arrangement concepts in terms of storage capacity, productivity, facility investments, truck service level.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.1
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• pp.325-330
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• 2006

The container terminal is the unified transportation system which connects between a land transportation and a sea transportation. This system has many subsystems such as ship operation, yard transfer operation, yard storage system, gate operation, and information manage system. This paper presents a method of modeling a simulator with which user can evaluate the efficiency of the equipment and allocation policies in the container terminal. The final purpose is to estimate the efficiency of each equipments and the distribution policies. In a design step in the simulator development. We suggest the Object Oriented method with which the developer can easily design, because the object oriented method has the advantages of reusability and modularity.

• Journal of Navigation and Port Research
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• v.42 no.1
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• pp.47-56
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• 2018

In this study, the focus is on the issue of whether a container terminal is facing the limitation of its productivity for serving mega-vessels with numerous containers. In order to enhance the terminal operations, a new conceptual design of the container handling system have been proposed. This research focuses on the rail-based container transport system and its operations. This system consists of rail-based shuttle cranes and rail-based transporters called flatcars. The deadlock problem for managing automated transporters in container terminals has been an important issue for a long measurement of time. Therefore, this study defines the deadlock situation and proposes its avoidance rules at the rail-based container transport system, which is required to handle numerous container throughput operations. The deadlock in the rail-based container transport system is classified into two parts: deadlock between cranes and flatcars; deadlock between flatcars. We developed the simulation model for use with characterizing and analyzing the rail-based container transport system. By running the simulation, we derived possible deadlock situations, and propose the several deadlock avoidance algorithms to provide results for these identified situations. In the simulation experiments, the performances of the deadlock avoidance algorithms are compared according to the frequency of deadlocks as noted in the simulations.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.471-473
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• 2005

본 논문에서는 전압원 컨버터를 이용한 HVDC 시스템의 제어기를 설계하고 그 동특성을 분석한 내용에 대해 기술하고 있다. 현재 전압형 HVDC의 기술은 전압원 컨버터를 이용하여 최대 330MW까지의 전력을 전송할 수가 있다. 따라서 전압형 HVDC의 시뮬레이션 모델을 통하여 송전계통에 적용시 계통의 전력조류제어 특성을 시뮬레이션 한다. 전압형 HVDC는 기존의 전류형 HVDC와는 달리 유효전력과 무효전력을 독립적으로 제어하는 것이 가능하고 스위칭 주파수가 높기 때문에 수동필터 규모가 작아져서 설치면적이 감소한다. 또한 다중터미널 방식을 적용함으로써 전송전력의 유연성을 높일 수 있다.

• Proceedings of the KIEE Conference
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• 2005.10a
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• pp.86-88
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• 2005

본 논문에서는 전압원 컨버터를 이용한 HVDC 시스템의 제어기를 설계하고 그 동특성을 분석한 내용에 대해 기술하고 있다. 현재 전압형 HVDC의 기술은 전압원 컨버터를 이용하여 최대 330MW까지의 전력을 전송할 수가 있다. 따라서 전압형 HVDC의 시뮬레이션 모델을 통하여 송전계통에 적용시 계통의 전력조류제어 특성을 시뮬레이션 한다. 전압형 HVDC는 기존의 전류형 HVDC와는 달리 유효전력과 무효전력을 독립적으로 제어하는 것이 가능하고 스위칭 주파수가 높기 때문에 수동필터규모가 작아져서 설치면적이 감소한다. 또한 다중터미널 방식을 적용함으로써 전송전력의 유연성을 높일 수 있다.