• 한국융합학회논문지
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• 제11권2호
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• pp.1-8
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• 2020

본 논문에서는 시간 가중치를 적용하여 각 노드들 간의 중간지점까지의 최적 경로 탐색 기법을 제안한다. 중간지점을 이용하는 서비스들은 주로 사용자들의 위치를 기반으로 하여 제공한다. 위치 기반 탐색 방법은 단순히 위치에 대해서만 고려하기 때문에 시간의 측면에서 효율적이지 못하다는 문제점이 있다. 제안된 방법은 기존의 위치 기반 탐색 방법의 문제점을 해결하기 위해 사용자들의 위치와 중간지점까지의 소요시간을 반영함으로써 각 노드와 중간지점까지의 가중치를 설정하고, 이를 활용하여 최적의 경로를 탐색할 수 있다. 또한, 탐색의 효율성을 증대하기 위해 주어지는 정보들에 적응적으로 가중치를 설정함으로써 높은 정확성을 갖도록 한다. 실험 결과, 제안된 방법은 기존 방법에 비해 중간지점까지의 최적 경로를 효과적으로 찾을 수 있음을 확인하였다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 추계학술발표회
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• pp.204-207
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• 2001

An optimization process for the design of groundwater remediation is developed by simultaneously considering the well location and the pumping rate. This process uses two independent models: simulation and optimization model. Groundwater flow and contaminant transport are simulated with MODFLOW and MT3D in simulation model. In optimization model, the location and pumping rate of each well are determined and evaluated by the genetic algorithm. In a homogeneous and symmetric domain, the developed model is tested using sequential pairs for pumping rate of each well, and the model gives more improved result than the model using sequential pairs. In application cases, the suggested optimal design shows that the main location of wells is on the centerline of contaminate distribution. The resulting optimal design also shows that the well with maximum pumping rate is replaced with the further one from the contaminant source along flow direction and that the optimal pumping rate declines when more cleanup time is given. But the optimal pumping rate is not linearly proportional to the cleanup time and the minimum total pumping volume does not coincide with the optimal pumping rate.

• 한국구조물진단유지관리공학회 논문집
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• 제24권5호
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• pp.37-44
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• 2020

본 연구는 오프셋 아웃리거 구조의 최적위치를 예측하는 대표적인 기존식보다 적절한 식을 제안하는데 목적이 있다. 이 연구에서는 79개 기존 오프셋 아웃리거 구조의 해석모델을 검토하였다. 그리고 기존 오프셋 아웃리거 모델에서의 주요한 변수는 전단벽과 오프셋 아웃리거의 강성, 오프셋 아웃리거에 연결된 외곽기둥의 강성, 프레임의 강성, 전단벽-프레임 구조에서 프레임의 수평강성비 등이다. 본 논문은 오프셋 아웃리거 구조의 최적위치를 예측하는 방법을 수정하여 제안하였다. 또한 본 연구의 결과는 초고층 오프셋 아웃리거 구조의 최적위치에 대한 중요한 구조공학자료를 제공한다.

• Journal of Korea Trade
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• 제27권5호
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• pp.23-40
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• 2023

Purpose - This study aims to present the changes and directions in the automotive supply chain in the face of changes in the global supply chain caused by external factors and the integration of industries resulting from internal factors. Assuming FDI in the Korean automotive industry in the US, this study analyzed the influential factors over the long term and derived the optimal location. Design/methodology - For this analysis, the characteristics and current status of the automotive industry are presented. Additionally, the study emphasizes the necessity and direction of change. The factors influencing Korea-US FDI in the automotive industry and the electric vehicle industry were analyzed through panel analysis. The optimal location from the perspective of distribution costs was selected using linear programming under the assumption that local demand will be replaced by local production in the future. Findings - This study found that the electric vehicle supply chain will change with the characteristics of the electric and electronic industries rather than with the traditional automotive industry. Additionally, in deriving the optimal location, the study emphasized the proximity to the consumption market. Originality/value - The analysis method and conclusions of this study not only present the influential factors and direction of FDI in the automotive industry but also can be applied to other industries. Moreover, the study provides practical and policy implications for industries and governments considering FDI in the US.

• 한국국방경영분석학회지
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• 제17권2호
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• pp.54-71
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• 1991

It is very important to increase defence capability rapidly against any surprise attack. This can be done by fast deployment of mobilization reserved resources. This paper is forcused on optimal allocation of special reserved resources. First of all, the location of special reserved resources is identified and then the location of combat and mobilization units and amount of requirement resources of each unit are identified. Finally, optimal allocation of the special reserved resources is obtained by Out of Kilter method.

• 한국기계연구소 소보
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• 통권15호
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• pp.117-125
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• 1985

It is usual practice to ballast a sip to maintain requires operational safety at sea. However, excessive ballasting may reduce the operational economy of a ship. Therefore, The determination of the optimal location and quantity of ballast water is one of the important works at the preliminary design stage. To provide a convenient tool to ship designers the program for the determination of the optimal location and program the effect of the change of ballast water quantity in each tank on some characteristics of a ship, such as trim, initial stability and heel, is investigated and the minimum quantity of ballast water for each tank which satisfies the operational safety requirements is calculated.

• 한국군사과학기술학회지
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• 제22권2호
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• pp.287-297
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• 2019

Monitoring for the physiological state of a solider is essential to the realization of individual combat system. Despite all efforts over the last decades, there is no report to point out the optimal location of the wearable biosensors considering both monitoring accuracy and operational robustness. In response, we quantitatively measure body temperature and heartrate from 34 body parts using 2 kinds of biosensor arrays, each of which consists of a thermocouple(TC) sensor and either a photoplethysmography(PPG) sensor or an electrocardiography(ECG) sensor. The optimal location is determined by scoring each body part in terms of signal intensity, convenience in use, placement durability, and activity impedance. The measurement leads to finding the optimal location of wearable biosensor arrays. Thumb and chest are identified as best body parts for TC/PPG sensors and TC/ECG sensors, respectively. The findings will contribute to the successful development of individual combat system.

• 한국구조물진단유지관리공학회 논문집
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• 제21권6호
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• pp.16-24
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• 2017

본 논문은 오프셋 아웃리거의 최적위치를 알기 위하여 우선 아웃리거 구조시스템이 설치된 80층의 초고층건물을 대상으로 MIDAS-Gen을 이용하여 계획설계 수준의 구조설계를 실시하였다. 그리고 본 연구에서는 기둥의 강성, 아웃리거의 평면상 위치, 아웃리거의 설치 높이 등을 주요한 변수로 선택하여 구조해석을 진행하였다. 또한 초고층건물의 오프셋 아웃리거에 대한 최적위치를 찾는 것을 목적으로 초고층건물의 구조설계에서 가장 필수적인 최상층에서 발생하는 수평변위를 분석하였다. 본 연구의 결과, 기둥의 강성, 아웃리거의 평면상 위치, 아웃리거의 설치 높이는 아웃리거 구조시스템의 최적위치에 영향을 주는 것으로 나타났다. 또한 본 연구의 결과는 초고층건물의 오프셋 아웃리거 구조시스템의 최적위치를 알려주는 구조설계 자료로 유용하다고 사료된다.

• 경영과학
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• 제28권2호
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• pp.53-62
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• 2011

The objective of this paper is to propose a Binary Particle Swarm Optimization(BPSO) for design of reporting cell management system. The assignment of cells to reporting or non-reporting cells is an NP-complete problem having an exponential complexity in the Reporting Cell Location Management(RCLM) system. The number of reporting cells and which cell must be reporting cell should be determined to balance the registration(location update) and search(paging) operations to minimize the cost of RCLM system. Experimental results demonstrate that BPSO is an effective and competitive approach in fairly satisfactory results with respect to solution quality and execution time for the optimal design of location management system.

• 대한산업공학회지
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• 제34권2호
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• pp.160-171
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• 2008

MU's mobility patterns can be found from a movement history data. The prediction accuracy and model complexity depend on the degree of application of history data. The more data we use, the more accurate the prediction is. As a result, the location management cost is reduced, but complexity of the model increases. In this paper, we classify MU's mobility patterns into four types. For each type, we find the respective optimal number of application of history data, and predictive location area by using the simulation. The optimal numbers of four types are shown to be different. When we use more than three application of history data, the simulation time and data storage are shown to increase very steeply.