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유상욱 영남이공대학 1976 論文集 Vol.5 No.-
Through the series of Laboratory tests and field surrey the author has studied, the effect of ghost interference on received TV picture. It turned out that for the normal Spectator, the minimum allowable reflected wave is -25dB at the ghost delay time of 0.8㎲, and that in most case, the significant ghost waves are earth from the 50'^70' degree azimuth with respect to the direct wave the auther then, studies the characterities of conventional Ya Gi antenna and points out its inpropriety in directly rejecting the ghost waves because of it's poor and gain. A specially designed Log-periodic antenna for TV Band with 13dB gain and high side robe attenuation is proved by the author to be efficient for this purpose: through the field tests.
OPTIMAL CONTROL FOR SOME REACTION DIFFUSION MODEL
유상욱 영남수학회 2016 East Asian mathematical journal Vol.32 No.3
This paper is concerned with the optimal control problem forsome reaction di usion model. That is, we show the existence of the globalweak solution for the Field-Noyes model. We also show the existence ofthe optimal control.
Optimal Control for the Forest Kinematic Model
유상욱 영남수학회 2015 East Asian mathematical journal Vol.31 No.3
This paper is concerned with the optimal control for the forest kinematic model. That is, we show the exiatence of the strong solution for the forest kinematic model and then show the existence of the optimal control.
Optimal control for Belousov-Zhabotinskii reaction model
유상욱 영남수학회 2015 East Asian mathematical journal Vol.31 No.1
This paper is concerned with the optimal control problemfor Belousov-Zhabotinskii reaction model. That is, we showthe existence of the global weak solution. We also show that the existence of the optimal control.
BOUNDARY CONTROL OF CHEMOTAXIS REACTION DIFFUSION SYSTEM
유상욱 호남수학회 2008 호남수학학술지 Vol.30 No.3
This paper is concerned with the boundary control of the chemotaxis reaction diffusion system. That is, we show the existence of the solution for the chemotaxis system with the boundary control and the existence of the optimal boundary control.
유상욱,김근형 한국정보과학회 2017 데이타베이스 연구 Vol.33 No.3
In this paper, we proposed the Multi-dimensional ranking model which could be not used only for analyzing reviews but also for analyzing other data types. The significant information would be extracted by the Multi-dimensional ranking with ways evaluating the ranking on evaland with evaluation items in various points of views. We also analyzed the Jeju tourism reviews posted on Tripadvisor site. The rankings of interest and good feeling about tourist attractions was evaluated and the rankings was also analyzed in dimensions of seasons and years so that we could derive the implications for establishing tourism strategies. 본 논문에서는 리뷰 데이터뿐만 아니라 다른 유형의 데이터를 분석할 때도 적용할 수 있는 다차원순위모델을 제안하였으며 이 모델을 기반으로 관광 리뷰데이터를 분석하였다. 다차원 순위 모델은 평가 대상 및 항목에 대하여 여러 관점에서 순위를 평가할 수 있도록 함으로써 유의미한 정보를 도출할 수 있도록 한다. 또한, 다차원순위모델을 기반으로 관광 웹사이트인 트립어드바이저에 게시된 제주 관광리뷰 빅데이터를 분석하였다. 관심도와 호감도가 높은 관광지의 순위, 중요 키워드 순위, 계절과 연도를 차원으로 하는 다차원 순위 분석을 통해 관광 여행 패턴과 인식도 등을 도출할 수 있었으며 이를 바탕으로 관광전략 수립을 위한 시사점을 제시하였다.
柳相旭 영남이공대학 1986 論文集 Vol.15 No.-
In the process of matching the transmitter and the antenna, It is designed for system transmitting the broadcasting for Single antenna Connecting With double trap as for prohibiting the other side broadcasting wave thus we have taken conclusions as follow. ① If the trap Impedance at Δf/f_(o) were longer than 0.01 and the Value of Q were disc-regarded, the Value of w_(0)L=1/w_(0)C would be high for getting above the Value of Impedance. ② When the total of the coil's KVA took about 200 〔KVA〕KVA) (Q=300), 163 〔KVA〕 (Q=200). the loss had 0.7〔KW〕, 0.08 〔KW〕respectively There for loss of the whole circuit have discerned 0.8〔KW〕.
柳相旭,朴柱台 영남이공대학 1990 論文集 Vol.19 No.-
In this paper, the filtering method is presented, which can be preserved on the edge of image with regulate the contrast of each image, with the use of the local variance value and the local mean value. Lee's algorithm has a good point that can be preserved the edge and removed well the noise on smooth part, but has a fault that the part of edge can not re-move the noise of this part, which the vauue of image made an observation is output just as it is.