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LMS 적응 알고리즘의 스텝크기의 적정 범위에 관한 연구
박영철,정창경,차균현 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.2
본 논문에서는 LMS 적응 알고리즘이 수렴하기 위한 스텝크기의 적정 범위를 등화기 계수의 양자화 오차와 초과 MSE를 고려하여 새로 제시하였으며 이의 타당상을 트랜스버설 등화기의 시뮬레이션을 통해 보았다. This paper presents a new optimal range of the step size to converge LMS adaptive algorithm considering quantization error of equalizer coefficient and excess MSE. And the simulation of transversal equalizer shows the propriety of it.
강화도 연안 돛대 기새우 (Leptochela gracilis)의 성장에 관한 연구
박영철,이영철 한국해양학회 1995 韓國海洋學會誌 Vol.30 No.2
Present study was performed to describe the growth of Leptochela gracilis (STIMPSON, 1860), the dominant species of the coastal water near Kanghwa Island, Korea. Samples were collected from 1 sampling point by long bag seine net at monthly interval from April 1993 to January 1994 except for August 1993. In the population study of Leptochela gracilis, ovigerous female has appeared from April to September 1993 and the ratio (egg-bearing female/female) showed over 70% from May to July 1993. Female individuals were predominant from May 1993 to January 1994 and it was found that sex ratios were not significantly different between pregnant and non-pregnant period(p>0.05). The population of Leptochela gracilis was divided into 2 types of generation; i) short term generation. and ii) long term generation. Longevity of the long term generation was presumed to vary from 12 to 15 months. In the case of short term generation, spawned by egg-bearing stock of September, however, it was not certain whether they absorbed in the long term generation, thus overcome winter season or die after December by environment factors. The growth in cavalcade length of the long term generation was better fitted to Pauly and Gaschutz model than Von Bertalanffy.