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직렬형 하이브리드 전기 트럭 구동용 견인전동기 제어 시스템
이재현(Jae-Hyun Lee),이지명(Ji-Myoung Lee),양이우(Yi-Woo Yang),박래관(Rae-Kwan Park),장서건(Seo-Geon Chang),이진주(Jin-Ju Lee),김상민(Sang-Min Kim) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
본 논문에서는 직렬형 디젤 하이브리드 전기 트럭 구동을 위한 견인 전동기 제어 시스템 개발에 대해 소개한다. 높은 출력 밀도를 요구하는 복합형 전기 차량의 특성을 고려하여 매입형 영구자석 동기전동기를 선정하고, 대전류 고효율 시스템 구성을 위해 수랭식 MCU(Motor Control Unit)를 개발 하였다. 또한 빠른 토크 응답 특성과 넓은 영역의 속도 운전을 위한 약자속 제어 기법을 적용하였으며, 전체 시스템 효율을 향상시키기 위해 단위 전류당 최대 토크 제어 기법(MTPA)이 사용 되었다. 개발 된 제어 시스템 및 제어 기법을 실험을 통해 검증 하였다.
복잡지형 고해상도 격자망에서의 PRISM 기반 강수추정법
정유란 ( U Ran Chung ),윤경담 ( Kyung Dahm Yun ),조경숙 ( Kyung Sook Cho ),이재현 ( Jae Hyun Yi ),윤진일 ( Jin I. Yun ) 한국농림기상학회 2009 한국농림기상학회지 Vol.11 No.2
The demand for rainfall data in gridded digital formats has increased in recent years due to the close linkage between hydrological models and decision support systems using the geographic information system. One of the most widely used tools for digital rainfall mapping is the PRISM (parameter-elevation regressions on independent slopes model) which uses point data (rain gauge stations), a digital elevation model (DEM), and other spatial datasets to generate repeatable estimates of monthly and annual precipitation. In the PRISM, rain gauge stations are assigned with weights that account for other climatically important factors besides elevation, and aspects and the topographic exposure are simulated by dividing the terrain into topographic facets. The size of facet or grid cell resolution is determined by the density of rain gauge stations and a 5×5km grid cell is considered as the lowest limit under the situation in Korea. The PRISM algorithms using a 270m DEM for South Korea were implemented in a script language environment (Python) and relevant weights for each 270m grid cell were derived from the monthly data from 432 official rain gauge stations. Weighted monthly precipitation data from at least 5 nearby stations for each grid cell were regressed to the elevation and the selected linear regression equations with the 270m DEM were used to generate a digital precipitation map of South Korea at 270m resolution. Among 1.25 million grid cells, precipitation estimates at 166 cells, where the measurements were made by the Korea Water Corporation rain gauge network, were extracted and the monthly estimation errors were evaluated. An average of 10% reduction in the root mean square error (RMSE) was found for any months with more than 100mm monthly precipitation compared to the RMSE associated with the original 5km PRISM estimates. This modified PRISM may be used for rainfall mapping in rainy season (May to September) at much higher spatial resolution than the original PRISM without losing the data accuracy.
신경로추적로 바이러스를 이용한 흰쥐 귀밑샘지배 중추신경핵의 면역조직화학적 동정
최진호,이재현,김진상,이흥식,이성준,김동대,채윤원,강태천 대한물리치료학회 1997 대한물리치료학회지 Vol.9 No.1
This Study was carried out to investigate the secondary cental nuclei innervating rat parotid gland. PRV-BaBlu as a neuronal tracer was injected into the left parotid gland and brains obtained through cardiac perfusion were treated by immunohistochemical staining. The results were as follows: 1. The secondary central nuclei innervating rat parotid gland were paraventricular nucleus and central part of amygdaloid complex largely in diencephalon. 2. The paraventricular nucleus and central part of amygdaloid camplex in diencephalon showed morphological asymmetry between PRV-BaBlu injected site and uninjected one. 3. The Ratio between total neurons and PRV-BaBlu infected neurons in paraventricular nucleus was 27.62±16.23% in left and 12.78±88.69% in right. 4. The Ratio between total neurons and PRV-BaBlu infected neurons in central part of amygdaloid nucleus was 14.25±9.26% in left and 8.35±66.26% in right.