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퍼지 묘사와 물리적 정보를 이용한 시스템 모델링과 모의
박규동(Gyu-Dong Park),변영태(Yung-Tai Byun),이기철(Kee-Chul Lee) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.2A
본 연구에서는 불완전하게 알려진 동적 시스템에 대한 인과 모의 방법을 제시한다. 인과 설명자를 사용하여 두 변수 사이의 인과 관계를 표현하고 정보 설명자를 사용하여 물리적 정보를 나타내어 인과 모델을 구성한다. 인과 설명자에는 퍼지 묘사가 부여되어 두 변수 사이의 영향의 정도를 나타내며, 이를 바탕으로 가중치를 생성하기 위한 알고리즘이 제시된다. 시스템 변수를 외연적 변수와 내포적 변수로 구분하여 각각의 경우에 대하여 순 영향을 구하는 방법을 제시한다. 끝으로 인과 모델을 모의하기 위한 시뮬레이션 알고리즘을 보이고 실제 예제에 적용한다.
박규동,변영태,Park, Gyu-Dong,Byun, Young-Tae 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.2
In this paper, we revise the JDL data fusion model to have an ability of distributed data fusion(DDF). Data fusion is a function that produces valuable information using data from multiple sources. After the network centric warfare concept was introduced, the data fusion was required to be expanded to DDF. We identify the data transfer and control between nodes is the core function of DDF. The previous data fusion models can not be used for DDF because they don't include that function. Therefore, we revise the previous JDL data fusion model by adding the core function of DDF and propose this new model as a model for DDF. We show that our model is adequate and useful for DDF by using several examples.
이종철,이상수,이종균,이규택,최성호,김재준,최규완,백승운,고광철,이풍렬,심상군,류광현,이준혁,박철근,손태성,여규동 대한소화기학회 2000 대한소화기학회지 Vol.36 No.5
Background/Aims: Prognostic factors related to the postoperative survival of patients with peripheral cholangiocarcinoma (PCC) are not well documented. The purpose of this study was to evaluate the clinical and pathologic factors that might influence the postoperative survival of patients with PCC. Methods: Twenty-nine patients with PCC underwent laparotomy between September 1994 and September 1999. Fourteen clinicopathologic factors influencing postoperative survival were analyzed in nineteen patients who underwent hepatic resection (resection group). Ten patients had unresectable advanced tumor (unresectable group). Results: In the resection group, the overall 1-, 2-, and 3-year survival rate was 51.4%, 45.0%, and 28.1%, respectively (median survival of 17.6 months). The median survival in the unresectable group was 4.1 months and no patient lived longer than 1 year. In univariate survival analysis, tumor size and perineural invasion were correlated significantly with overall survival. The survival of patients who underwent resection with positive margin was significantly longer than that of the unresectable group. Conclusions: An aggressive surgical approach provides the best chance for long-term survival of patients with PCC. Tumor size and perineural invasion may be considered as prognostic factors for postoperative survival, but a large, long-term study is needed.