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손민균(Min-Kyun Son),김동민(Dong-Min Kim),김진오(Jin-O Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.11
In competitive market, it is important to establish a plan of transmission expansion considering uncertainty of future generation and load behavior. For this reason, revised transmission expansion model is proposed in this paper. In the proposed model, information of predictable future condition are included in a cost function of transmission expansion investment. Also, to reduce risk of the investment, mean-variance Markowitz approach is added to the objective function of cost. By optimization programming, the most robust and the minimum cost plan can be obtained.
孫旼均(Min-Kyun Son),金?吾(Jin-O Kim) 대한전기학회 2008 전기학회논문지 Vol.57 No.4
Today, as the power trades between generation companies and power customer are liberalized, the uncertainty level of operated power system is rapidly increased. Therefore, transmission operators as decision makers for transmission expansion are required to establish a deliberate investment plan for effective operations of transmission facilities considering forecasted conditions of power system. This paper proposes the methodology for the optimal solution of transmission expansion in deregulated power system. The paper obtains the expected value of transmission congestion cost for various scenarios by using occurrence probability. In addition, the paper assumes that increasing rates of loads are the probability distribution and indicates the location of expanded transmission line, the time for transmission expansion with the minimum cost for the future by performing the Montecarlo simulation. To minimize the investment risk as the variance of the congestion cost, Mean-Variance Markowitz portfolio theory is applied to the optimization model by the penalty factor of the variance. By the case study, the optimal solution for transmission expansion plan considering the feature of market participants is obtained.
최기열(Choi, Ki-yeol),박예림(Park, Ye Rim),손민균(Son, Min Kyun),유미리(You, Mi Ry),유현정(Yoo, Hyun Jung) 충북대학교 생활과학연구소 2018 생활과학연구논총 Vol.22 No.1
This paper presents an investigation into the consumption behavior of aloners among college students according to the consumption trends of aloners recently on the rise. A survey was conducted with total 320 college students at universities in Cheongju for approximately three weeks from June 20 to July 12, 2016. The major findings were as follows: First, the study examined the overall consumption life of college students and found that they were more accustomed to consumption with their friends than consumption by themselves. The analysis results of their individualism/collectivism tendencies, however, showed that they preferred the individualism tendency, which indicates that their perceptions of being alone were less negative than before and changed to be daily and universal. Secondly, 42.8% of the entire college students belonged to aloners. Of them, 86.6% were voluntary aloner members, overwhelming their non-voluntary counterparts(13.4%). The reasons why they became aloners were divided into emotion and condition categories. Many of them became aloners voluntarily to avoid emotional losses. Thirdly, the study examined differences in consumption satisfaction between consumption by oneself and consumption with others and found that aloners had no big differences in satisfaction with consumption between them, whereas the non-myself aloners recorded considerably higher points in consumption behavior with others than consumption behavior by themselves. Finally, the study analyzed the effects of mental states regarding consumption by oneself on satisfaction and found that negative psychology had negative effects on satisfaction with consumption by oneself.
초발수성 표면처리 효과 및 열선을 이용한 SCR System 내 Mixer의 Urea 고형화 방지 연구
한상수(Sangsoo Han),지수훈(Soohun Gee),전필수(Pilsoo Jeon),윤상원(Sangwon Yun),김경표(Gyungpyo Kim),손민균(Mingyun Son),TURABAEV KOMILJON(Komilzon Turabaev),윤은형(Eunhyung Yun),안승번(Seongbun An),이강원(Gangwon Lee),정재희(Jaehe 한국가스학회 2021 한국가스학회 학술대회논문집 Vol.2021 No.11