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江陵市의 財政構造 分析 : 江陵市의 財政포지션에 관한 硏究(Ⅰ)
金根中 강릉대학교 영동산업문제연구소 1983 産經論叢 Vol.1 No.-
Starting an analysis of the fiscal paition in Kang-reung City, this study is the first step representing the real state of finance structure in this city. The fiscal position of a jurisdiction t o carry out its fiscal tasks depend on its capacity relative to the outlay required for rendering its need. As changes in economic role of regional government, city governments areanguished from both side of fiscal structure 1. The tendency of the decling fiscal revenue based on the basic rule that the larger the taxing jurisdiction relative to the country as a whole, the more effectively it can operate a tax for both administrative and economic reason. 2. Their growing role in administrative arid economic function to the regions contained the welfare expenditure, polute policy, investment plan, and so on. And for these reason fiscal positions may be weakcd over years. In Kang-reung City that focus in this analysis the size of fiscal expenditure has been enormously increasing sincc last 6 years. But on the other side of city finance structure, local tax revenue has been increased below the increasing rate of expenditure. Fortunately, non-tax revenue were increased rapidly in recent years, which were able to meet the expenditures. In near future Kang-reung city Government may be confornted with contradiction.- limitation of fiscal revenue and increment in fiscal need. Only the stable security in revenue and improvement of efficiency in fiscal expenditure are to help the city from the incompatibility.
고기영,김두영,김근중 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1
도시지형 혹은 원격탐사용 자동인식시스템등에 사용하고 있는 SAR(Synthetic Aperture Radar) 영상은 위성 혹은 비행기에서 remote sensor용 radar 신호의 에너지 반사 세기치로 특정 지형의 영상 세트를 획득하고, 이를 multi-sensor 영상 처리로 원하는 대상인 도로 혹은 빌딩등의 경계선 정보를 자동 인식하고 있다. 본 논문은 기후의 변화에 무관하게 획득가능한 SAR 영상시스템에서, SAR 영상 획득과정에서 발생하는 가장 큰 문제점인 스펙클(speckle) 잡음을 줄이는 방법을 제시한다. 이는 4방향별 2차 미분의 특징 벡터롤 구성된 공간 마스크에서 중심화소와 인접한 주위 화소간의 상관관계의 조사할때 상관관계가 없는 영역의 2차원 분산치를 측정을 통한 필터링을 수행하는 것이다. 본 연구에서 제시하는 스펙클 잡음의 제거 필터는 edge 영역을 필터링과정에서 보존하며 spike와 multiplicative 잡음을 필터한다.
리튬이차전지 음극용 석유계 피치로 코팅된 천연 흑연의 전기화학적 특성
김근중,조윤지,이종대 한국화학공학회 2019 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.57 No.5
The electrochemical properties of pitch-coated natural graphite(NG) were investigated as an anode for lithium-ion batteries. The anode materials were prepared by heat-treatment of mixture of NG and petroleum pitch at 1000 o C. The pitches with various softening points were used as carbon precursor. The physical properties of anode materials were analyzed by TGA, SEM, PSA and BET. As the softening point increased, the thickness of the coating layer increased and the specific surface area decreased. The electrochemical performances were investigated by initial charge/discharge efficiency, cycle stability, cyclic voltammetry, rate performance and electrochemical impedance spectroscopy. The carbon-coated NG using pitch with softening points of 250 o C showed an initial discharge capacity of 361 mAh/g and a coulombic efficiency of 92.6%. Also, the rate performance(5 C/0.2 C) was 1.6 times higher than that of NG, and it had a capacity retention (90%) after 50 cycles at 0.5 C. 리튬이차전지용 음극재로서 피치로 코팅된 천연흑연의 전기화학적 특성이 조사되었다. 천연흑연과 피치의 혼합물을1000 o C에서 소성하여 음극재를 제조하였다. 다양한 연화점의 피치가 탄소전구체로 사용되었다. 제조된 음극재의 물리적 특성은 TGA, SEM, PSA 및 BET로 분석하였다. 피치의 연화점이 증가할수록 코팅 층의 두께가 증가하였고, 비표면적이 감소하였다. 초기 충·방전 효율, 사이클, 순환전압전류, 속도 특성 및 임피던스 테스트를 통해 전기화학적 성능을 조사하였다. 연화점 250 o C의 피치로 탄소 코팅된 천연흑연은 초기 방전용량 361 mAh/g과 쿨롱 효율 92.6%을 보였다. 또한 출력 특성(5 C/0.2 C)은 코팅되지 않은 천연흑연에 비해 1.6배 향상되었으며, 0.5 C로 진행된 사이클 테스트에서 50 사이클 후 90%의 용량 유지율을 나타내었다.
김두영,김순백,김근중 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1
this paper presents a method of an edge detection and an extraction of geometric features based on computing an amount of gray scale variation. This method is derived by converting a change of gray scale between two regions of an image into a variation function that gives the difference between the gray level of each region and the gray level of the line of discontinuity. The process of computing the relative difference yields the magnitude, direction, and slope of and edge. By focusing on the relative variation of gray level for pixels between small regions, the filtering process of the local region identifies and smooths uncorrelated features for a truer edge than is possible by smoothing a larger region. We present results from the use of this feature extraction method as applied not only to visual images, but also to range and thermal images.
김근중,박재운,김명기 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.2
The goal of restoration techniques is to improve a given image in some sense. We consider restoration to be a process that attempts to recover an image that has been degraded by using some priori knowledge of the degradation phenomenon. The restoration of images distorted by systems with noisy point spread function and additive detection noise is considered. The criterion considered for the restoration is based on the wiener filter. The overall computation of the Wiener filter can be carried out in the frequency domain using the FFT. The Wiener filer gives better restoration result.