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차량 통합ECU에서 싱글 및 멀티코어 프로세서 효과 분석 방안
임찬우(Chan-Woo Lim),주효재(Hyo-Jae Ju) 한국컴퓨터정보학회 2017 한국컴퓨터정보학회 학술발표논문집 Vol.25 No.2
통합 ECU를 구현할 시, 구현단계 이전에 어떤 코어를 적용 시킬지를 판단하여 추후 발생할 수 있는 비용, 성능, 소요 시간 등의 문제점을 미리 대비할 수 있는 방안이 필요하다. 따라서 본 논문에서는 차량 통합ECU에서 싱글코어와 멀티코어 프로세서 중 어떤 프로세서를 적용하는 것이 효율적인 것인지 판단하는 연구를 진행했다. 통합 ECU의 기능이 결정된 경우, 구현이전의 설계 단계에서 기능적 요구 사항들을 고려하여 SW Task를 HW 모델에 적용했을 때의 효과를 분석했다. 분석 된 결과를 토대로 통합 ECU 모델의 싱글 및 멀티 코어 방식에 따른 성능을 비교했다. 본 논문에서 제안한 분석 방안을 적용하면 구현 단계이전에 통합 ECU에 필요한 프로세서의 성능을 파악할 수 있다. 또한, 통합 ECU 구현 비용 및 개발 소요 시간을 줄일 수 있는 효과를 불러올 수 있을 것으로 예상한다.
김국렬(Kuk Ryul Kim),임찬우(Chan Woo Lim),정준기(Jun ki Jung),이태연(Tae Yeon Lee),채장범(JangBom Chai) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
Safety has become the most important issue in operation and maintenance in nuclear power plants. Therefore, It is necessary to find defects in on early stage and to identify them to be corrected. In this paper, the method to monitor and diagnose the condition of a reciprocating pump, which is used to supply the cooling water was developed. To characterize the parameters of the reciprocating pump with the data, a flow loop was designed and constructed. The pump was operated under the various conditions and the defects were introduced on pump to examine their effects on the signal. Normal and defected signatures were gathered and analyzed to develop the patterns of defects. Based on the database, the diagnostic algorithm was developed and tested.
최광준 ( Kwang Jun Choi ),송성호 ( Sung Ho Song ),김진성 ( Jin Sung Kim ),임찬우 ( Chan Woo Lim ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.5
Over 96.2% of the agricultural water in Jeju Island is obtained from groundwater and there are quite distinct characteristics of agricultural water demand/supply spatially because of regional and seasonal differences in cropping system and rainfall amount. Land use for cultivating crops is expected to decrease 7.4% (4,215 ha) in 2020 compared to 2010, while market garden including various vegetable crop types having high water demand is increasing over the Island, especially western area having lower rainfall amount compared to southern area. On the other hand, land use for fruit including citrus and mandarin having low water demand is widely distributed over southern and northern part having higher rainfall amount. The agricultural water demand of 1,214×103 ㎥/day in 2020 is estimated about 1.39 times compared to groundwater supply capacity of 874×103㎥/day in 2010 with 42.4% of eastern, 103.1% of western, 61.9% of southern, and 77.0% of northern region. Moreover, net secured amount of agricultural groundwater would be expected to be much smaller due to regional disparity of water demand/supply, the lack of linkage system between the agricultural water supply facilities, and high percentage of private wells. Therefore, it is necessary to ensure the total net secured amount of agricultural groundwater to overcome the expected regional discrepancy of water demand and supply by establishing policy alternative of regional water supply plan over the Island, including linkage system between wells, water tank enlargement, private wells maintenance and public wells development, and continuous enlargement of rainwater utilization facilities.