• Title/Summary/Keyword: Easy maintain

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Study of Large Wind Power Generator with Evaporative Cooling System

  • Wang, Haifeng;Li, Wang;Guo, Hui;Yang, Jie;Gu, Guobiao
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.1
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    • pp.93-97
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    • 2014
  • Evaporative cooling system has the advantage of high cooling performance, good insulation properties, less electrical fault, easy to maintain and high reliability, can meet the requirements of the cooling system in wind power generators. Based on a large number of theoretical researches and engineering practices, we had a comprehensive study of evaporative cooling wind power generator. Studies show that evaporative cooling system has advantage as the cooling system of wind power generator.

A study for a combination type of power supply for the BTS system of the mobile telecommunication (이동통신 기지국 시스템을 위한 일체형 전원 공급장치 개발에 관한 연구)

  • Lee, Dong-Man
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.394-400
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    • 2007
  • This thesis aims the development of power supply for the BTS of Mobile Telecommunication system. Specially, it receives AC power and it can be possible both supply the uninterrupted and stabile DC Power to BTS and simultaneously maintain full charging the back-up battery that is used in case failing AC power supply. In addition, easy maintenance is also the main purpose of it regardless of front and left side except rear side. In these days, it needs more small size power supply system in order to comply with the user needs regarding more easy maintenance and more less space as become smaller main telecommunication systems. This system can be installed close to wall and support more easy maintenance and it was considered easy expansion in case when it needs.

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Middleware Architecture for Open Control Systems in the Distributed Computing Environment

  • Lee, Wongoo;Park, Jaehyun
    • Transactions on Control, Automation and Systems Engineering
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    • v.3 no.3
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    • pp.190-195
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    • 2001
  • The advance of computer, network, and Internet technology enables the control systems to process the massive data in the distributed computing environments. To implement and maintain the software in distributed environment, the component-based methodology is widely used. This paper proposes the middleware architecture for the distributed computer control system. With the proposed middleware services, it is relatively easy to maintain compatibility between products and to implement a portable control application. To achieve the compatibility between heterogeneous systems, the proposed architecture provides the communication protocols based on the XML with lightweight event-based service.

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방사성환기설비 운전에 있어서의 부압변동 요인 및 대응 방안

  • 이강무;이범철;이영희;김태국;손종식;홍권표;김홍태
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2004.06a
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    • pp.334-335
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    • 2004
  • It is important that the contaminated air is not revealed to the outside of the facility. The inside of the facility should be classified into several zones according to the radioactivity and each zone should maintain tile differential negative pressure between the zones also. It is not easy to equilibrate the pressure during the operation. On the normal operation, the clogging of the HEPA filter and the opening of the doors/shutters influence very much. We could maintain the differential negative pressure between the zones by the constant watching and periodical replacement of the filters.

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Homepage Integration Strategy and Implementation of Public Institutions (기관의 홈페이지 통합 관리 방안 설계 및 시스템 구현)

  • Hwang In-A;Yang Maeng-Ho;Go Yeong-Cheol;Lee Hae-Cho
    • Proceedings of the Korea Technology Innovation Society Conference
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    • 2005.10a
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    • pp.675-688
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    • 2005
  • It is essential for any public institution to establish a systematical scheme and a management system to maintain the contents and securities of its ever-expandingweb-site with efficiency. The general users want a reliable system and a simple and stress-free web environment, and expect the public institutions to maintain the accuracy and conformity of information they provide to the public. In かis study, 1 examined a web-site owned by a certain governmental research institute for the current maintenance status and problems to seek an effective and easy-to-use scheme for both users and web managers. Based on what I teamed from my study, 1 moved on to design a web integration system and tested it on the above mentioned web-site for analysis.

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A Study on the Improvement of the Method for Implementing Protection Algorithm by using Component Object Model(COM) (컴포넌트 오브젝트 모델을 응용한 계전 알고리즘 구현방법의 개선에 관한 연구)

  • Park, In-Kwon;Yoon, Nam-Seon;An, Bok-Shin
    • Proceedings of the KIEE Conference
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    • 1998.07c
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    • pp.1210-1212
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    • 1998
  • The complexity of newly developed protection algorithm and higher performance requested by the user makes the software embedded in the protective relay much harder to develop and maintain. The versatility of 32bit microprocessor and the availability of cheaper memory semiconductors introduced the fertile developing background for the protective relay developers. The use of component object model(COM) in the software developing process enables the developer to write much complex code in the easy and safe way and to maintain the code easily, too. And the aid of the COM library, the distributed computing environment will be expected to appear by the use of the COM programming model in the protective relay firmware program.

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Agricultural Extension in the Information Age (정보화시대의 농촌지도사업)

  • Choe, Young-Chan
    • Journal of Agricultural Extension & Community Development
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    • v.1 no.1
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    • pp.29-36
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    • 1994
  • The demand for agricultural information system are small but expanding in Korea. Use of information system in farm extension hilps both farmers and extensionists. This study undertakes surveys of literature on information system and extension to finds their relationship. Use of the information system can make extension service more effective if it is developed to meet following factors; 1) consider real farm problem; 2) solve the problems; 3) generate more values than costs; 4) consider real farm environments; 5) comprehensive enough to consider all relevant knowledge domain; 6) sensitive enough to meet the changes in farm environment; 7) educational and easy to learn; 8) easy to maintain.

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Development of Performance Test Equipment for Easy-Hill Assist Valve (EHA 밸브 성능시험 장치 개발)

  • Jung, G.H.
    • Journal of Drive and Control
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    • v.11 no.4
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    • pp.61-67
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    • 2014
  • When a manual transmission equipped car stops on an incline where the nose of the car is higher than the rear, hill-start control or hill-holder could prevent the vehicle from rolling backward as the car moves forward. The easy-hill assist valve consists of a check valve and a needle type ON/OFF solenoid valve connected in parallel; it is a hydraulic actuator that can maintain brake pressure using an electrical signal from the ECU. As the EHA valve is a safety-related component of the brake system, high reliability as well as superior dynamic performance is required for it to be applied in commercial vehicles. This paper presents the design of the EHA valve as a piece of equipment that can simulate the brake actuation pressure with a pressurizing piston. Following specific test standards, the experimental results validate the implemented functions of the test equipment, proving the test stand to be effective for the performance and endurance of the EHA valve.

A study of generation alternation model in genetic algorithm

  • Ito, Minoru;Sugisaka, Masanori
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.93.4-93
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    • 2002
  • When the GA is applied to optimization problems, it is important to maintain the diversity in designing generation alternation model. Generally, when the diversity is not fully maintained, it is difficult to find good solution, and it is easy to stagnate the early convergenece. In this paper, we propose the Elite Correlation Selection operator (ECS) as a new selection operator for survival. This selection operator aims to keep the diversity of populations and contributes the high searching ability. This selection operator is an extension of selection operator for survival in the Minimal Generation Gap (MGG). In the selection for survival, this selection operator selects one elite individual...

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Study on Discharge Metering Methods in Agricultural Open Canal (농업개수로 유량측정 현황 및 적정 방안 고찰)

  • Kim, Jin-Taek;Park, Ji-Hwan;Khu, Bon-Chung
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2005.10a
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    • pp.56-60
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    • 2005
  • It is necessary to irrigate for agriculture in Korea and agricultural canals play important roles in irrigation. Nowadays gauging water discharge in canals is important because of water shortage in Korea. But It is rare to gauging water discharge in canals. Several water level gauges are installed in agricultural canals through TM/TC. But the abilities of the gauges are insufficient for agricultural water metering. In this situation, we are developing the water discharge metering system which is inexpensive and easy to maintain.

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