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NETLA Based optimal synthesis method of binary neural network for pattern recognition
이준탁 한국지능시스템학회 2004 한국지능시스템학회논문지 Vol.14 No.2
This paper describes an optimal synthesis method of binary neural network for pattern recognition. Our objective is to minimize the number of connections and the number of neurons in hidden layer by using a Newly Expanded and Truncated Learning Algorithm (NETLA) for the multilayered neural networks. The synthesis method in NETLA uses the Expanded Sum of Product (ESP) of the boolean expressions and is based on the multilayer perceptron. It has an ability to optimize a given binary neural network in the binary space without any iterative learning as the conventional Error Back Propagation (EBP) algorithm. Furthermore, NETLA can reduce the number of the required neurons in hidden layer and the number of connections. Therefore, this learning algorithm can speed up training for the pattern recognition problems. The superiority of NETLA to other learning algorithms is demonstrated by an practical application to the approximation problem of a circular region.
Back-Propagation 신경 회로망을 이용한 비선형 시스템의 자기 학습 제어
이준탁,송호신,박철영,박영식 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.1
A new algorithm is designed with the purpose of identifing the structure and the parameters of the nonlinear discrete-time plant with only the unknown dynamics and the weak informations about its structure. The proposed algorithm is to compensate the weighting values using its previous derivatives and to decrease exponentially a series of self-learning coefficients. Through simulations, it is shown that the newly proposed algorithm is more effective and is superior to the conventional ones.
李準琸,李昌垠 慶北大學校 産業開發硏究所 1976 硏究報告 Vol.4 No.-
This study was carried out to select the variety showing high yield, stem rot tolerance and high oil content among the local varieties of sesame in Kyungpook district. An-dong local variety showed the highest yield in the varieties tested and followed by Tae-gu variety. In branching type, An-dong, Gim-cheun, Woul-seung and Tae-gu varities were non-branching type, and Yae-cheun, Cheung-do and Seun-san varieties were branching type. An-dong, Gim-cheun, Woul-seung and Tae-gu varieties had 3 capsules in axil, and Yae-cheun, Dal-seung, Cheung-do, and Seun-san varieties had one capsule. In the type of capsule, An-dong, Yae-cheun, Cheung-do, Gim-cheun and Tae-gu varieties were 4 cells, and Seun-san variety was 8 cells but Dal-seung and Woul-seung varieties were mixed with 4 and 8 cells. Woul-seung variety was yellow brown and the others were white in seed color. In the degree of tolerance against stem rot, An-dong and Tae-gu varieties were resistant, Cheung-do, Woul-seung and Yae-cheun varieties were moderate, and Dal-seung and Gim-cheun varieties were susceptible.
李準琸,金文鎬,朴京順 慶北大學校 1983 論文集 Vol.36 No.-
The 27 species of the medicinal plants belong to 20 families which seemed to be infected by fungal pathogenes were collected at 8 localities in Korea during 1981 and 1982, and the diseases were diagnosed on the basis of their symptoms and the characteristics of the pathogenes. The results were summarized as follows; The anthracnose on 10 species, powdery mildew on 6 species, rust on 3 species, white rust by Albugo sp. on 2 species, respectively, and leaf spot by Septoria sp. and Phyllosticta sp., smut by Ustilago sp., grey mold by Cercospora sp., pale spot by Ramularia sp., ring spot by Pestalotia sp., and pod blight cladosporium sp. were found on each one species of the plants. Among them 11 diseases were turned out to be new diseases which has not hitherto been described on those hosts in Korea.
非線形 시스템의 퍼지 모델링과 퍼지 시스템의 安定度 解析에 관한 연구
李浚柝 東亞大學校 附設 情報通信硏究所 1994 情報通信硏究所論文誌 Vol.2 No.1
본 논문은 비선형 시스템을 선형 퍼지 모델로 표현하는 기법과 Lyapunov 부등식과 고유치 검증을 통하여, 퍼지 제어 시스템의 안정도를 해석하는 기법을 제안하고 있다. 먼저, 비선형 시스템은 언어적 퍼지 변수와 퍼지 규칙에 기초한 다수 개의 선형 서브 시스템으로 분할한다. 그리고, 최적 피드백 제어칙에 의해 각 서브 시스템의 점근 안정을 보장하는 외란 적응 제어기를 설계하여, 전체 퍼지 시스템의 대역적 점근 안정도 보장되게 한다.
이준탁,정형환 한국의학물리학회 1991 의학물리 Vol.2 No.2
본 논문은 인공폐의 설계및 임상진단을 위한 허파기능의 연구 및 호흡생리의 요체인 폐모세 혈관내 혈액의 Hb와 가스상 산소의 비선형 결합특성을 규명할 수 있는 새로운 산소포화 모델을 전기적 등가회로에 기초하여 유도하였다. 새로이 유도된 산소포화 모텔은 종래의 모델에 비해 훨씬 간단하고, 광범위한 pH 및 각 생리 parameter 등의 변동에도 정확히 적용될 수 있었을 뿐 아니라, 결합반응과 등가인 2단 및 4단 RC 전기적 등가회로의 Simulation 결과로 부터, Hb 와 산소의 비선형 결합특성은 2단계의 복합 반응으로 취급하는 것이 타당함을 확인하였다. A newly derived O$_2$ Saturation Model which can be adapted to the design and study of Artificial Lung and Blood Gas Calculator etc. is introduced on the basis of Electrical Equivalent Circuits. The presented 4 stage and 2 stage RC circuits have good correlatons with actual chemical reactions of Hemoglobin and Oxygen. However, from results of computer simulations, 2 stage equivalent model is more accurate than 4 stage and conventional O$_2$ saturation models.
Fuzzy Controller를 이용한 Servo System의 제어
이준탁,이승환 동아대학교 공과대학 부설 한국자원개발연구소 1991 硏究報告 Vol.15 No.1
A new control technique of designing a Fuzzy Controller, based on the vague informations and the Fuzzy Set theory, is introduced and is applied to the control of a Servo System which requires faster and more accurate dynamic responses compared with other complex industrial processes. A Fuzzy Controller designed by this algorithm is consisted of a set of linguistic rules which represented the control strategies of an experienced human expert. We prove also the adaptive performances against internal-external disturbances and the usefulness of this controller from the results of simulations.
亞麻立枯病菌(Fusarium oxysporum f. lini)의 發育에 미치는 炭素源과 窒素源의 影響
李準琸 慶北大學校 1978 論文集 Vol.25-26 No.-
In this study, the effect of carbon and nitrogen sources utilized in culture medium on the growth of Fusarium oxysporum f. lini was investigated. This fungus grew well in the range from 15 to 30℃, and the optimum temperature of the fungus growing was 28℃. Fructose, maltose, mannose, and glucose were the best carbon source, and the optimum concentration of carbon source was 5 percentage of fructose, sucrose and glucose for growth of the fungus. This fungus utilized nitrate nitrogen better than ammonium nitrogen.