• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.140-144
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• 2005

In this paper, an almost everywhere convergence theorem for seminormed fuzzy co-integrals is showed provided that the fuzzy measure is null-additive.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.2
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• pp.183-186
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• 2008

We consider fuzzy invex sets, fuzzy preinvex functions, fuzzy quasi-preinvex functions, and fuzzy logarithmic preinvex functions. Murofushi et al. have been studied Choquet integrals and their properties. In this paper, we study some characterizations in Choquet integrals as follows: fuzzy preinvexity, fuzzy quasi-preinvexity, and fuzzy logarithemic preinvexity, that mean some characterizations of functionals defined by Choquet integrals. Furthermore, we discuss Jensen's type inequality in Choquet integrals.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.3
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• pp.262-266
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• 2004

In general, the fuzzy integral lacks some important properties that Lebesgue integral possesses. One of them is linearity. In this paper, we introduce fuzzy linearity in which we use the supremum and the infimum instead of additon and scalar multiplication in the expression of linearity and show that the fuzzy linearity of the seminormed fuzzy integrals of interval-valued functions when the fuzzy measure g is fuzzy additive, the continuous t-seminorm is saturated and measurable functions satisfy the condition[Max].

• ICROS
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• v.1 no.3
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• pp.39-51
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• 1995

이 글에서는 퍼지이론의 양대부류인 퍼지집합론과 퍼지척도 및 퍼지적분에 대하여 정의 및 기본적 성질을 간략히 소개하였다. 이러한 이론들의 주된 응용분야가 제어와 평가문제로부터 점점 다양한 분야(예를 들면, 자연언어 처리, 퍼지컴퓨터, 경제학, 심리학 등)로 확산되고 있는 현시점에서, 보다 많은 사람들이 퍼지이론에 관신을 갖게 되는데 조금이나마 도움이 됐으면 한다. 최근 우리들의 관심 중 많은 부분이 지적시스템(intelligent system)의 구현에 쏠리고 있음을 감안할 때, 이러한 퍼지이론은 신경회로망이론, 유전자 알고리즘 및 카오스이론과 더불어 지적시스템의 구현을 위한 충분한 도구로서 혹은 방법론으로서 크게 공헌하리라 생각한다.

• Journal of the Korean Institute of Intelligent Systems
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• v.4 no.3
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• pp.3-13
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• 1994

본 논문에서는 진화 프로그래밍을 이용한 다기준 퍼지제어(MFC : Multicriteria Fuzzy Control)를 제안한다. MFC의 기본적인 아이디어는 출력응답의 속성을 분석하여 기존의 퍼지 제어에 퍼지 척도와 퍼지 적분 이론을 적용한 것이다. 퍼지 적분 평가를 위해서 rise time, overshoot, settling time의 세가지 속성이 사용된다. MFC를 통해서 이 세가지 속성을 조정할 수 있다. 진화 프로그래밍은 원하는 조정 특성을 갖도록 MFC의 퍼지 척도를 최적화한다. 모의 실험을 통해서 제안된 방법이 기존의 퍼지 제어보다 우수함을 보인다.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.2
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• pp.153-159
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• 2009

The steel balls are core elements between inner part and outer part in a bearing system. The degree of goodness of the steel balls has been visually processed by human beings. In this paper we propose a new method that uses image processing algorithm and fuzzy logic theory. We use fuzzy inference engine and fuzzy Choquet integral algorithm in the proposed system. We first distinguish the defects of the steel balls by an image processing algorithm. And then the degree of the defects is classified by a fuzzy logic system. We perform some simulations to show the effectiveness and feasibility of the proposed system.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2006.05a
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• pp.365-369
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• 2006

Interval-valued fuzzy sets were suggested for the first time by Gorzalczang(1983) and Turken(1986). Based on this, Wang and Li extended their operations on interval-valued fuzzy numbers. Recently, Hong(2002) generalized results of Wang and Li and extended to interval-valued fuzzy sets with Riemann integral. Using interval-valued Choquet integrals with respect to a fuzzy measure instead of Riemann integrals with respect to a classical measure, we studied some characterizations of interval-valued Choquet distance(2005). In this paper, we define Choquet distance measure for fuzzy number-valued fuzzy numbers and investigate some algebraic properties of them.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.12a
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• pp.435-438
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• 2002

본 논문은 웹 상에서 음악을 듣는 사용자의 음악 취향을 평가 한 후, 취향에 맞는 인터페이스를 추천하는 시스템을 구현하였다. 초기 음악 취향 평가 단계에서는 평가 요소인 장르, 가수, 최신곡에 대한 사용자 데이터와 평가 요소에 대한 실험을 통해 얻은 중요도를 이용하여 퍼지측도.적분을 수행한다. 수행 결과 값이 높은 음악의 평가 요소에 의해 인터페이스를 추천하고, 추천된 인터페이스에 대한 선택 곡 수와 들은 시간으로 퍼지 추론을 통해 인터페이스에 대한 만족도를 평가한다. 평가된 만족도에 의해 중요도를 변경시킴으로써 사용자의 취향에 맞는 인터페이스를 제공하는 시스템 을 제안한다.

• The Journal of the Korea Contents Association
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• v.6 no.5
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• pp.20-28
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• 2006

This paper proposes visual-feature extraction for each band in wavelet domain with both spatial frequency features and multi resolution features, and the combination of visual features using fuzzy integral. In addition, it uses color feature expression method taking advantage of the frequency of the same color after color quantization for reducing quantization error, a disadvantage of the existing color histogram intersection method. Also, it is found that the final similarity can be represented in a linear combination of the respective factors(Homogram, color, energy) when each factor is independent one another. With respect to the combination patterns the fuzzy measurement is defined and the fuzzy integral is taken. Experiments are peformed on a database containing 1,000 color images. The proposed method gives better performance than the conventional method in both objective and subjective performance evaluation.

• Journal of Digital Contents Society
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• v.9 no.1
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• pp.53-60
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• 2008

Based on similarities between fuzzy set theory and mathematical morphology, Grabish proposed a fuzzy morphology based on the Sugeno fuzzy integral. This paper proposes a fuzzy mathematical morphology based on the defuzzification of the fuzzy measure which corresponds to fuzzy integral. Its process makes a fuzzy set used as a measure of the inclusion of each fuzzy measure for subsets. To calculate such an integral a $\lambda$-fuzzy measure is defined which gives every subsets associated with the universe of discourse, a definite non-negative weight. Fast implementable definitions for erosion and dilation based on the fuzzy measure was given. An application for robust skeletonization of two-dimensional objects was presented. Simulation examples showed that the object reconstruction from their skeletal subsets that can be achieved by using the proposed was better than by using the binary mathematical morphology in most cases.