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유전자 알고리듬을 이용한 공작기계구조물의 정강성 해석 및 다목적 함수 최적화(I)
이영우,성활경 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
In this paper, multiphase optimization of machine structure is presented. The goal of first step is to obtain (ⅰ) light weight, (ⅱ) rigidity statically. In this step, multiple optimization problem with two objective functions is treated using Pareto Genetic Algorithm. Where two objective functions are weight of the structure, and static compliance. The method is applied to a new machine structure design.
李瑛雨,朱剛 최신의학사 1974 最新醫學 Vol.17 No.10
One day post-natal male chicks were divided into two experimental groups: AM and PM sacrificed groups. Of the AM group, 3 chicks per hour were injected with 3H-thymidine at one hour intervals throughout the day starting from 5:00 AM, and every chick was dispatched at 6:00AM next morning. Likewise, the injection of the PM chicks was started from 2:00 PM and dispatched at 3:00 PM next day. Each duodenum was removed and subjected into autoradiography and the cell cycle and its par?ameters of duodenal crypts were determined and discussed in relation to reports that dealt with similar subjects. The results reported distinctly demonstrate the circadian rhythm in the parameters analyzed. Callular proliferation activity was more prminent in PM chicks than in AM chicks. Labelling index of PM chicks (30.4%) was significantly greater than that of AM chicks (20.7%) and the duration of S phase of PM chicks was lesser than that of AM chicks. The generation time of PM chicks was significantly shorter than that of AM chicks and the dif?ference between the duration of Gx phases of AM and PM groups might account mainly for the circadian influence.
이영우,조영삼 한국인터넷전자상거래학회 2017 인터넷전자상거래연구 Vol.17 No.5
We investigate the influence of various industrial factors on the product innovation performance of Korean manufacturing firms. While the resource-based perspective and industry-based perspective have established that both firm- and industry-level factors are relevant for firms' level of innovation, little is known about the extent to which the internal capabilities of a firm interact with the industrial environment in which the firm resides in. With a sample of 197 Korean manufacturing firms, this paper seeks to contribute to the literature by identifying industrial factors that can enhance or reduce the level of product innovations. Furthermore, our analysis indicates that the external linkages to foreign knowledge can play a vital role in coping with such competitive pressures, which in turn increase a firm's innovation performance.