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효율적 리셋 기법을 이용한 VSS-SA기반 적응 푸리에 분석 알고리즘
나은혜(Eun-Hye Na),김진(Jin Kim),남상원(Sang-Won Nam) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
This paper proposes an adaptive Fourier analysis algorithm using VSS-SA robust against impulsive noise along with an efficient reset method. Specifically, for the adopted reset method in the proposed algorithm, the error variance estimates obtained for the step-size update are reused to set the control variable without employing additional variables. Computer simulation results show that the proposed algorithm requiring lower computational complexity yields the same robust convergence performance for adaptive Fourier analysis as the conventional algorithm.
낙동강 중류 보 구간에서의 시,공간적 수질 분포 특성 연구
나은혜 ( Eun Hye Na ),박수영 ( Suyoung Park ),김종하 ( Jongha Kim ),임성수 ( Seongsoo Im ),김경현 ( Kyunghyun Kim ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
We investigated the spatial and temporal patterns of water quality in the Gangjung-Goryoung weir that is located in the middle area of the Nakdong river, Korea. The monitoring results indicated that there are discernible vertical differences in water quality during the pre- and post-monsoon periods (May to September). During this period, it was observed that the weak thermal stratification formed at the maximum level, and pH, Chl-a, and DO concentrations in the surface layer were higher than those in the bottom layer. This vertical difference was especially noticeable for DO concentrations: there were DO depletions at the bottom layer in late June to early August. During the summer monsoon period with heavy rainfall, there was a decline in vertical differences in water quality. From this study, it was suggested that continuous monitoring of vertical profiles could become a useful tool for identifying the spatial and temporal distributions of water quality and for developing the best management policy for water quality in the Nakdong river.