• 제목, 요약, 키워드: Storage System

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서브클러스터링을 이용한 홀로그래픽 정보저장 시스템의 비트 에러 보정 기법 (Bit Error Reduction for Holographic Data Storage System Using Subclustering)

  • 김상훈;양현석;박영필
    • 정보저장시스템학회논문집
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    • v.6 no.1
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    • pp.31-36
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    • 2010
  • Data storage related with writing and retrieving requires high storage capacity, fast transfer rate and less access time. Today any data storage system cannot satisfy these conditions, however holographic data storage system can perform faster data transfer rate because it is a page oriented memory system using volume hologram in writing and retrieving data. System can be constructed without mechanical actuating part so fast data transfer rate and high storage capacity about 1Tb/cm3 can be realized. In this research, to correct errors of binary data stored in holographic data storage system, a new method for reduction errors is suggested. First, find cluster centers using subtractive clustering algorithm then reduce intensities of pixels around cluster centers. By using this error reduction method following results are obtained ; the effect of Inter Pixel Interference noise in the holographic data storage system is decreased and the intensity profile of data page becomes uniform therefore the better data storage system can be constructed.

창고시스템에서 보관위치할당 방식에 대한 이동거리와 보관위치 수의 분석 (Analysis of the Travel Distance and the Number of Storage Location for Storage Location Allocation Methods in a Warehouse System)

  • 장석화
    • 산업경영시스템학회지
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    • v.29 no.2
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    • pp.58-66
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    • 2006
  • This paper addresses the analysis of the travel distance and the number of storage location for storage location allocation methods in a warehouse system. The dedicated, randomized, combined and limited storage methods are considered. The combined and the limited storage methods are suggested here, which the combined storage method is to divide the storage locations into the dedicated storage area and the randomized storage area, and the limited storage method is to restrict the storage area of each product. Through a numerical example, the average travel distance between input/output point and the storage locations, and the number of storage location needed in the warehouse are compared between storage location allocation methods. The nearest randomized storage method is shown as the reasonable one in the travel distance and the number of storage location.

대용량 콘텐츠의 저장관리시스템에 관한 연구 (A Study on storage management system for the contents of great quantity)

  • 조윤희
    • 경영과정보연구
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    • v.11
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    • pp.45-69
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    • 2002
  • One of important technology that must improve compulsorily on information-oriented society stores, search and transmit cultural contents data of great quantity in heterogeneous environment. SAN appeared by solution to resolve the problem such as integration management of heterogeneous system data, effective practical use of storage, data transmission limit is happened from here. SAN is system that manage and shares data of large quantity efficiently attaching directly to high speed network such as Fiber Channel that storage system has been attached to server individually SAN became more complicated than existent storage environment although offer much advantage such as decrease of storage expense and flexibility of system configuration. This study argues management way could consider in such environment that understand complexity and component of networked storage system.

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홀로그래픽 정보 저장 장치에서 클러스터링을 이용한 에러 감소 기법 제안 및 비교 (Design and Comparison of Error Reduction Methods Using Clustering in Holographic Data Storage System)

  • 김상훈;김장현;양현석;박영필
    • 정보저장시스템학회:학술대회논문집
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    • pp.83-87
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    • 2005
  • Data storage related with writing and retrieving requires high storage capacity, fast transfer rate and less access time in. Today any data storage system can not satisfy these conditions, but holographic data storage system can perform faster data transfer rate because it is a page oriented memory system using volume hologram in writing and retrieving data. System architecture without mechanical actuating pare is possible, so fast data transfer rate and high storage capacity about 1Tb/cm3 can be realized. In this paper, to correct errors of binary data stored in holographic digital data storage system, find cluster centers using clustering algorithm and reduce intensities of pixels around centers. We archive the procedure by two algorithms of C-mean and subtractive clustering, and compare the results of the two algorithms. By using proper clustering algorithm, the intensity profile of data page will be uniform and the better data storage system can be realized.

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20KW 전력저장 전지시스템 설계 (20 KW Battery Storage System Design)

  • 고요;김호용;남기영;김재언;조기연;엄영창
    • 대한전기학회:학술대회논문집
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    • pp.254-257
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    • 1989
  • Battery Energy Storage System has been studied and adopted actively by foreign advanced utilities, in order to utilize off peak energy. The outline of 20KW Battery Storage System design of the project - the study on the development of Battery Electric Energy Storage System, carried out by KERI KEPCO, is presented. The first target of this project is the conceptual design of MW-class Battery Storage System and 20KW Battery Storage System is its the small scale system.

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도시철도용 에너지저장시스템 개발에 관한 연구 (Development of Energy Storage System for Urban Transit System)

  • 이한민;김길동;정의진
    • 한국신재생에너지학회:학술대회논문집
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    • pp.162.2-162.2
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    • 2010
  • The energy storage system is considered to be one of the useful devices for energy storing and recycling. the energy storage system can save energy cost and stabilize the system voltage. This paper presents the development of two energy storage systems. One is 750V system for light rail system. the other is 1500V system for heavy rail system.

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Subclustering을 이용한 홀로그래픽 디지털 정보저장 시스템의 이진 데이터 에러 보정기 구현 (Design Error Corrector of Binary Data in Holographic Digital Data Storage System Using Subclustering)

  • 김상훈;김장현;양현석;박영필
    • 대한전기학회:학술대회논문집
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    • pp.617-619
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    • 2004
  • Data storage related with writing and retrieving requires high storage capacity, fast transfer rate and less access time in. Today any data storage system can not satisfy these conditions, but holographic data storage system can perform faster data transfer rate because it is a page oriented memory system using volume hologram in writing and retrieving data. System architecture without mechanical actuating part is possible, so fast data transfer rate and high storage capacity about $1Tb/cm^3$ can be realized. In this paper, to correct errors of binary data stored in holographic digital data storage system, find cluster centers using subtractive clustering and reduce intensities of pixels around centers, so the intensify profile of data rare will be uniform and the better data storage system can be realized.

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Design and Comparison of Error Correctors Using Clustering in Holographic Data Storage System

  • Kim, Sang-Hoon;Kim, Jang-Hyun;Yang, Hyun-Seok;Park, Young-Pil
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1076-1079
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    • 2005
  • Data storage related with writing and retrieving requires high storage capacity, fast transfer rate and less access time in. Today any data storage system can not satisfy these conditions, but holographic data storage system can perform faster data transfer rate because it is a page oriented memory system using volume hologram in writing and retrieving data. System architecture without mechanical actuating part is possible, so fast data transfer rate and high storage capacity about 1Tb/cm3 can be realized. In this paper, to correct errors of binary data stored in holographic digital data storage system, find cluster centers using clustering algorithm and reduce intensities of pixels around centers. We archive the procedure by two algorithms of C-mean and subtractive clustering, and compare the results of the two algorithms. By using proper clustering algorithm, the intensity profile of data page will be uniform and the better data storage system can be realized.

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직류전기철도에서 운행시격에 따른 에너지저장장치의 효율에 관한 연구 (A Study on the Efficiency of Energy Storage System Applied to the Power Traction System of DC Electric Railway)

  • 김성대;최규형
    • 한국철도학회:학술대회논문집
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    • pp.754-760
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    • 2011
  • In the DC traction system, a large load current of electric railcar leads to a voltage drop when a vehicle starts, and the regenerative power generated by brake system increases the catenary voltage. To minimize the voltage fluctuation during the train operation and make use of the regenerative power, several types of energy storage systems are being studied. The energy storage system that is being recently introduced consists of the supercapacitors for energy storage and the bi-direction DC/DC converter for charge/discharge control. The efficiency of the energy storage system depends on the train operation pattern. In this paper, the operation efficiency of the energy storage system was quantitatively analyzed via simulation study taking consideration of the train operation patterns. The simulation was conducted changing the headway of trains with the energy storage system that uses the bi-direction DC/DC converter and supercapacitor. The simulation results showed that the operation efficiency of the energy storage system increases as the headway increase.

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수중 하베스트형 빙축열 시스템의 축방냉 특성 (Experiment of Characteristic on the Charge and Discharge of Cold for In-Water Harvest-Type Ice Storage System)

  • 장용식;최인수;문춘근;천석현;김재돌;윤정인
    • 대한기계학회:학술대회논문집
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    • pp.268-273
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    • 2001
  • A fundamental study on the harvest-type ice storage system applied ice making method in-water and its temperature characteristics in ice storage system was performed experimentally of the charge and discharge of cold. This paper is concerned with the development of a new method for making and separating ice and saving floated ice by installing an evaporation plate at in-water within a storage tank. In a conventional harvest-type ice storage system, a tank saves ice by separating a formed ice from an installed evaporation plate, which is located above an ice storage tank as an ice storage system. A new harvest-type method shows very good heat transfer efficiency than a convectional method. It is because the evaporation panel is directly contacted with water in a storage tank. Also, at a conventional system a circulating pump, a circulating water distributor and a piping are installed, but these components are not necessary in a new method. In this study two kinds of ice storage systems are experimentally investigated to study the thermal characteristics of ice storage tanks.

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