• 제목/요약/키워드: Industrial Location

검색결과 1,483건 처리시간 0.025초

이동 통신망에서의 혼합형 위치 갱신 방법의 성능분석 (Performance Analysis of Hybrid Location Update Strategy in Wireless Communication System)

  • 이구연
    • 산업기술연구
    • /
    • 제26권B호
    • /
    • pp.191-198
    • /
    • 2006
  • In this paper, we focus on a question. Which is better between time-based location update method and movement-based location update method? Or, does any other method combining the two methods show better performance? For the question, we propose a hybrid location update scheme, which integrates the time-based and the movement-based methods. In the proposed scheme, a mobile terminal updates its location after n cell boundary crossing and a time interval of T, or the inverse. We derive an analytical solution for the performance of the hybrid scheme with exponential cell resident time. From the numerical analysis, we conclude that the movement-based method seems to have better performance than the time-based and hybrid methods, that is the optimal costs occur at T=0.

  • PDF

단계적 최적립지 결정 방법에 관한 연구 (An Approach to Multi-Stage Decision Process for Optimum Location)

  • 김복만;김지일
    • 산업경영시스템학회지
    • /
    • 제17권30호
    • /
    • pp.11-24
    • /
    • 1994
  • The problem of location for industries and residential quarters has undoubtedly been one of the most important factors to enhance human activities and standard of living. Nonetheless. there seem to be no such theories or approaches as to cope with this problem satisfactorily. As a matter of fact the evaluation of proposed locations so far has stuck to quantitative factors and thus the results are often rejected by the public or individuals. In deciding the location of industrial complex and/or residential quarters, the qualitative factors often play more important role than the quantitative factors. Moreover, it is quite possible for a proposed location to be disapproved for reasons other than quantifiable factors. This work presents an approach to multi-stage decision process of optimum location, particularly for residential quarters. The proposed approach consists of four stages. At the first stage, candidates for the location are searched and checked against musts. After this screening process, the candidates fulfilling the musts are evaluated both quantitatively and qualitatively at the second stage. The third stage is devoted to the integrated evaluation using diffrent weights for the two factors. At the final stage, a location is selected among the candidates evaluated at the earlier stages. This approach has been applied to and tested on a apartment-building project in Ulsan area. Difficulties arising from quantifying factors were encountered as expected. Sometimes decisions could be a matter of taste of the individuals concerned.

  • PDF

우리 나라산업입지 변화요인 분석: 구조적 접근 (The Changing Industrial Location Factors in Korea: A Review on Structural Approach)

  • 김재철
    • 한국경제지리학회지
    • /
    • 제2권1_2호
    • /
    • pp.27-45
    • /
    • 1999
  • 최근 제조업의 수도권의 집중, 서울에서 경기지역으로 분산과 경기직역의 성장, 수도권질서 첨단산업으로의 구조재편과 중소기업의 집적, 그리고 농촌지역에서의 대기업 분공장 입지 등의 현상에 대해 우리나라 경제발전의 역사과정의 맥락에서 구조적 접근을 통해 살펴보았다. 그 결과 자본의 국제적 이동과정질서 신국제분업과 경제성장은 한국의 공간구조를 불균등하게 조직하였고, 그리고 지속적인 경제성장에 따른 자본축적은 지가상승, 임금상승 그리고 노동재생산기반의 지리적 차이와 산업의 공간분업을 발생시켰다. 이러한 변화된 요인에 의해서 오늘날 제조업 입지변화를 설명할 수 있다. 따라서 향후 지식기반과 관련된 사회문화적 구조와 지가와 관련된 토지이용구조의 입지요인들이 더욱 구조적으로 연구가 진행되어야 할 것이다.

  • PDF

Capacitated Location and Allocation Models of Long-Term Care Facilities

  • Song, Byung Duk;Ko, Young Dae;Morrison, James R.;Hwang, Hark
    • Industrial Engineering and Management Systems
    • /
    • 제12권3호
    • /
    • pp.190-197
    • /
    • 2013
  • People are living longer than ever before. As a result, life expectancy is going up and the demand of long-term care facilities is increasing in most countries. The facilities provide rehabilitative, restorative, and skilled nursing care to patients or residents in need of assistance with activities of daily living. This study deals with the capacitated location and allocation problem of long-term care facilities in a city that consists of a finite number of regions. Assuming that in each region candidate locations for three types of facilities are already given, two integer programming models are developed under the closest assignment rule reflecting the demand characteristics of the facilities. Both the location and type of the facilities to be built become decision variables. To show the validity of the models, numerical problems are solved with commercial software, CPLEX. Also, sensitivity studies were conducted to identify relationships between the system parameters.

로지스틱스관리에서 배송센터의 입지선정 (Determining the Location of Distribution Center in Business Logistics)

  • 한수희;오형술
    • 산업경영시스템학회지
    • /
    • 제20권44호
    • /
    • pp.33-46
    • /
    • 1997
  • The location decision problem for distribution center is one of the most important problem in business logistics system. Because the proportion of holding and transportation cost to physical distribution cost in our country exceed the 60%, a corporation must feel strong pressure to investigate the location problem for distribution center. This paper presents an algorithm for determining the best location of distribution center in consideration with physical distribution cost, demand, and customer location. The methods of determining the distribution center location is that firstly many of proposed sites are built up where demand position is distributed, and then optimal location of distribution center is selected.

  • PDF

시뮬레이티드어닐링을 이용한 리포팅셀 위치관리시스템 최적 설계 (Optimal Design of Reporting Cell Location Management System using Simulated annealing System)

  • 김성수;문재기
    • 산업기술연구
    • /
    • 제28권B호
    • /
    • pp.9-14
    • /
    • 2008
  • In the Reporting Cell Location Management (RCLM) system, a subset of cells in the network is designated as the reporting cells. Each mobile terminal performs location update only when it enters one of these reporting cells. When a call arrives, the paging is confined to the reporting cell the user last reported and the neighboring bounded non-reporting cells. Frequent location update may result in degradation of quality of service due to interference. Miss on the location of a mobile terminal will necessitate a search operation on the network when a call comes in. We must decide the number of reporting cells and which cell should be reporting cell to balance the registration (location update) and search (paging) operations to minimize the cost of RCLM system. This paper proposes a simulated annealing (SA) for optimization of RCLM system.

  • PDF

랭킹개미군전략을 이용한 리포팅셀 위치관리시스템 최적 설계 (Optimal Design of Reporting Cell Location Management System using Ranking Ant Colony System)

  • 김성수;김근배
    • 산업공학
    • /
    • 제19권2호
    • /
    • pp.168-173
    • /
    • 2006
  • In the Reporting Cell Location Management (RCLM) system, a subset of cells in the network is designated as the reporting cells. Each mobile terminal performs location update only when it enters one of these reporting cells. When a call arrives, the paging is confined to the reporting cell the user last reported and the neighboring bounded non-reporting cells. Frequent location update may result in degradation of quality of service due to interference. Miss on the location of a mobile terminal will necessitate a search operation on the network when a call comes in. We must decide the number of reporting cells and which cell should be reporting cell to balance the registration (location update) and search (paging) operations to minimize the cost of RCLM system. This paper proposes a ranking ant colony system (RACS) for optimization of RCLM system.

스마트폰을 이용한 위치 기반 정보 공유 SNS 어플리케이션 개발 (A Development of SNS Application for Location based Information Sharing using Smartphone)

  • 차경애
    • 한국산업정보학회논문지
    • /
    • 제18권6호
    • /
    • pp.1-8
    • /
    • 2013
  • 스마트폰의 사용이 일상화되면서, 그 휴대성에 의해서 소셜 네트워크 서비스(SNS, Social Network Service) 어플리케이션의 사용이 매우 활발하다. 또한 위치 이동에 따른 정보의 활용이 가능한 위치 기반 서비스(Location based Service)의 수요가 확대되면서 SNS와 결합된 형태의 서비스가 스마트폰의 사용성을 향상시키고 있다. 본 논문에서는 사용자의 위치를 실시간으로 추적하여 이동하는 위치에 따라 작성되어진 SNS를 위한 정보를 자동으로 알려주는 LBSNS(Location Based Social Networking Service)가 가능한 어플리케이션을 구현한다.

해양 유·무인 수상함정의 감시정찰 임무를 위한 위치-경로 문제 (Location-Routing Problem for Reconnaissance Surveillance Missions of the Maritime Manned-Unmanned Surface Vehicles)

  • 이진호
    • 산업경영시스템학회지
    • /
    • 제46권4호
    • /
    • pp.238-245
    • /
    • 2023
  • As technologies have been more quickly developed in this 4th Industry Revolution era, their application to defense industry has been also growing. With these much advanced technologies, we attempt to use Manned-Unmanned Teaming systems in various military operations. In this study, we consider the Location-Routing Problem for reconnaissance surveillance missions of the maritime manned-unmanned surface vehicles. As a solution technique, the two-phase method is presented. In the first location phase, the p-median problem is solved to determine which nodes are used as the seeds for the manned vehicles using Lagrangian relaxation with the subgradient method. In the second routing phase, using the results obtained from the location phase, the Vehicle Routing Problems are solved to determine the search routes of the unmanned vehicles by applying the Location Based Heuristic. For three network data sets, computational experiments are conducted to show the performance of the proposed two-phase method.

단계적 절차를 이용한 산업기술연구단지 최적입지 결정 - 울산산업기술연구단지를 중심으로 - (Site Selection of Ulsan Industrial Technology Research Park Using Stepwise Procedures)

  • 김복만;최성운
    • 산업경영시스템학회지
    • /
    • 제22권49호
    • /
    • pp.99-113
    • /
    • 1999
  • This paper describes a study which was undertaken in Ulsan City. It attempted to develop stepwise procedures that would aid Ulsan City in making decision of primary importance: what is the optimal site location for establishing a new Industrial Technology Research Park for public development\ulcorner The presented modeling procedures are an adaption of a number of exiting methods for the evaluation of industrial site potential. The procedures to determine the best site location can be divided into three phases : (i)defining the information necessary to compare potential sites, (ii) collecting the information for each site and (iii)evaluation potential sites utilizing the location model.

  • PDF