http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
베이지언 정보엔트로피에 의한 불완전 의사결정 시스템의 불확실성 향상
최규석,박인규,Choi, Gyoo-Seok,Park, In-Kyu 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.6
Based on the indiscernible relation of rough set, the inevitability of superposition and inconsistency of data makes the reduction of attributes very important in information system. Rough set has difficulty in the difference of attribute reduction between consistent and inconsistent information system. In this paper, we propose the new uncertainty measure and attribute reduction algorithm by Bayesian posterior probability for correlation analysis between condition and decision attributes. We compare the proposed method and the conditional information entropy to address the uncertainty of inconsistent information system. As the result, our method has more accuracy than conditional information entropy in dealing with uncertainty via mutual information of condition and decision attributes of information system. 러프집합을 구성하는 식별불가능 관계를 표현하는 정보시스템에서 데이터의 중복이나 비일관성은 피할 수 없기 때문에 속성의 감축은 매우 중요하다. 러프집합이론에 있어서 일관적인 정보시스템과 비일관적인 정보시스템의 속성감축의 차이를 극복하고 자, 본 연구에서는 조건 및 결정속성에 대한 상관분석에 베이지언 사후확률을 적용한 새로운 불확실성 척도와 속성감축 알고리즘을 제안한다. 정보시스템의 불확실성에 대하여 제안된 척도와 기존의 조건부 정보엔트로피 척도를 비교해 본 결과, 정보시스템의 조건속성과 결정속성의 상호정보를 이용하여 속성간의 불확실성을 측정하는데 있어 제안된 방법이 조건부 정보엔트로피에 의한 방법보다 정확성이 있음을 보여준다.
라만 분광법을 이용한 Biphenylcarboxylic Acid 유도체들의 흡착 배향 연구
최혜란,최규석,정일기,송홍석,한건옥,최호섭,이상희,유수창,Heay Ran Choi,Kyu Seok Choi,Il Ki Jung,Hong Seok Song,Keun Ok Han,Ho Seob Choi,Sang Hee Lee,Soo-Chang Yu 대한화학회 2003 대한화학회지 Vol.47 No.5
Au와 Ag 콜로이드 단일막 표면위에 흡착된 4-biphenylcarboxylic acid(BPCA)의 유도체인 4''-cyano-BPCA(c-BPCA), 4''-mercapto-BPCA(m-BPCA), 그리고 4''-amino-BPCA(a-BPCA)가 어떠한 배향을 하는지 알아보기 위해 표면증강라만(SER)분광법을 이용하여 연구하였다. 체계적인 분석을 위해 benzoic acid, biphenyl, 그리고 BPCA의 분자 배향에 대한 정보를 기본으로 위 분자들에 대한 흡착정보를 유추해내었다. 배향에 대한 정보를 위해 벤젠고리 모드, C-H 신축진동모드, carboxylate 음이온의 신축진동모드, 그리고 각각의 주요 작용기에 해당되는 모드들의 거동변화를 살펴보았으며 이로부터 m-BPCA는 thiol 그룹이 금속에 흡착되고 biphenyl 그룹이 기울어 서 있는 형태를 취하고 있고 나머지 분자들은 금속표면에 편평한 형태로 흡착됨을 알아내었다. Surface-enhanced Raman(SER) spectroscopy was utilized to investigate the adorption orientation of the 4-biphenylcarboxylic acid(BPCA) derivatives, such as 4'-cyano-BPCA(c-BPCA), 4'-mercapto-BPCA(m-BPCA), and 4'-amino-BPCA(a-BPCA), which were adsorbed on Au and Ag colloid monolayers. For the systematic approach, information regarding the adsorption behavior of benzoic acid, biphenyl, and BPCA was applied to the target molecules. From the spectral behaviors of benzene ring, C-H stretching, carboxylate anion, and the other finger printing vibrational modes, it was concluded that only the m-BPCA was adsorbed tilt with thiol group being adsorbed on Au surface, whereas the other molecules were adsorbed flat on both Au and Ag surfaces.
퍼지 모델과 유전 알고리즘을 이용한 쓰레기 소각로의 연소 제어
박종진,최규석,Park, Jong-Jin,Choi, Kyu-Seok 한국정보처리학회 2000 정보처리논문지 Vol.7 No.7
본 논문에서는 퍼지 모델과 유진 알고리즘을 이용한 쓰레기 소각로의 언소 제어를 제안한다. 먼저 복잡하고 비선형 시스템인 소각로의 퍼지 모델을 얻기 위해 퍼지 모델링이 수행된다. 얻어진 퍼지 모델은 주어지는 입력에 대해 소각로의 출력을 예측한다. 그리고 유전 알고리즘을 이용하여 원하는 소각로 츨려에 대해 모든 가능한 해 집합 안에서 최적 제어입력 값을 탐색하고 얻어진 최적 제어입력은 소각로에 인가되어 제어가 행해진다. 제안된 방법의 성능을 평가하기 휘해, 증발량을 출력으로 하는 소각로 연소제어의 컴퓨터 시뮬레이션이 수행되었다. 그 결과, 소각로의 퍼지 모델의 성능 평가지수 ISE(오차제곱 적분)는 0015로 매우 작았으며, 연소제어 시 증발량은 설정값 주위에서 일정하게 유지되고, 제안된 방법에 의한 성능지수 ITAE는 352로 수동운전에 의한 결과 1275보다 우수하였다. In this paper we propose combustion control of refuse incineration plant using fuzzy model and genetic algorithm. At first fuzzy modelling is performed to obtain fuzzy model of the refuse incineration plant and obtained fuzzy model predicts outputs of the plant when inputs are given. Fuzzy model ca be used to obtain control strategy, and train and enhance operators' skill by simulating the plant. Then genetic algorithms search and find out optimal control inputs over all possible solutions in respect to desired outputs and these are inserted to plant. In order to testify proposed control method, computer simulation was carried out. As a result, ISE of fuzzy model of refuse incineration plant is 0.015 and ITAE of control by proposed method, 352 which is better than that by manual operation.
퍼지 모델과 유전 알고리즘을 이용한 쓰레기 소각로의 연소 제어
박종진(Jong Jin Park),최규석(Kyu Seok Choi) 한국정보처리학회 2000 정보처리학회논문지 Vol.7 No.7
In this paper we propose combustion control of refuse incineration plant using fuzzy model and genetic algorithm. At first fuzzy modelling is performed to obtain fuzzy model of the refuse incineration plant and obtained fuzzy model predicts outputs of the plant when inputs are given. Fuzzy model can be used to obtain control strategy, and train and enhance operators'' skill by simulating the plant. Then genetic algorithms search and find out optimal control inputs over all possible solutions in respect to desired outputs and these are inserted to plant. In order to testify proposed control method, computer simulation was carried out. As a result, ISE of fuzzy model of refuse incineration plant is 0.015 and ITAE of control by proposed method, 352 which is better than that by manual operation.
김영욱,박호용,이영하,최규석,전수한,윤영국,황규하 대한혈관외과학회 1999 Vascular Specialist International Vol.15 No.2
Purpose: Acute limb ischemia is not only a limb-threatening but also a life-threatening condition. Despite the use of surgical and/or thrombolytic therapy for this urgent treatment-requiring condition, it is still reported to carry high morbidity and mortality rates. Methods: We analyzed the treatment outcomes of 118 limbs (11 upper limbs, 107 lower limb) with acute limb ischemia treated for 103 patients (age, median: 64, male 89 female 14) at the Department of Surgery, Kyungpook National University Hospital, from March 1993 to March 1999. The underlymg causes of acute limb ischemia included 62 limbs with acute arterial embolism in 51 patients, 39 limbs with acute arterial thrombosis in 37 patients, 15 limbs with graft occlusion in 14 patients, and 2 limbs of undetermined cause of limb ischemia in 1 patient. The retrospective, nonrandomized study was done. Results: The underlying causes of acute limb ischemia were arterial embolism in 52.5%, arterial thmmbosis in 33.1%, bypass graft occlusion 12.7%, and undetermined cause in 1.7%. Severity of ischemia according to the SVS/ISCVS classification, 107 limbs (90.7%) were classified as category II and 9 limbs (7.6%) were in category III. For the limbs with embolisms, 47 embolectomies (including 6 cases treated with adjuvant thrombolytic therapy) and 10 arterial bypasses were performed. For the limbs with thromboses, 23 arterial bypasses, 5 thrombectomies, and 4 catheter directed thrombolytic therapies were performed. For the patients with acute graft occusion, 8 redo bypasses, 4 thrombolytic therapies, and 2 thrombectomies were performed. We experienced major limb amputations in 8.1%, hospital mortality in 13.7% and recurrence of ischemic symptoms in 16.1% during the follow-up period in the embolism patients and limb amputations in 2.7%, hospital mortality in 14.3%, and recurrence of ischemic symptoms in 8.3% of the thrombosis patients. Of the patients with category II ischemia, major limb amputation and hospital mortality rates were 4.7% and 9.2%, respectively. Conclusion: In dealing with acute limb ischemia, prompt and appropriate selection of treatment modalities, if needed in combined modes, is critically important in improving the treatment outcomes.