• International Journal of Fuzzy Logic and Intelligent Systems
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• 제8권2호
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• pp.87-93
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• 2008

In this paper, we propose a hierarchical fuzzy based nutrition evaluation system that can analyze the individuals' nutrition status through the inference results generated by each layer. Moreover, a method to minimize the uncertainty of inference in the evaluated nutrition status is discussed. To show the effect of the uncertainty in fuzzy inference, we compared the results of nutrition evaluation with/without the certainty factor of rules on 132 people over the age of 65. From the experimental results, we can see that the evaluation method with the modified certainty factor provides better reliability than that of the general evaluation method without the certainty factor.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2000년도 춘계학술대회 학술발표 논문집
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• pp.63-68
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• 2000

In this paper, a control algorithm suitable for multi-objective control problems is proposed based on the orthogonal array which is normally used in statistics and industrial engineering. And a newly defined Nth-certainty factor is suggested, which can effectively exclude the less confident rules. The Nth-certainty factor is defined by the F-values of the ANOVA(analysis of variance) table. It is shown that the algorithm can be successfully adopted to the design of controller for an active magnetic bearing system.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.802-805
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• 1993

A method of automatic learning of fuzzy if-then rules with certainty factors from the given input-output data is developed. A certainty factor expresses the degree to which a fuzzy if-then rule is fitting to the given data. Fuzzy if-then rules with certainty factors are generated without optimization techniques. The obtained fuzzy if-then rules can be regarded as an approximator of a non-linear function. This method is applied to GMDH (Group Method of Data Handling) to cope with difficulty in approximating multi-input functions with fuzzy if-then rules.

• 한국멀티미디어학회논문지
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• 제7권4호
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• pp.559-566
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• 2004

일반적으로 퍼지 생성규칙의 확신도와 규칙에 나타나는 퍼지 명제의 확신도는 0과 1사이의 실수로 표현한다. 만일 퍼지 생성규칙의 확신도와 퍼지 명제의 확신도를 구간값 퍼지 집합으로 표현한다면, 규칙기반시스템이 더 유연한 방법으로 퍼지 추론을 하는 것이 가능하게 된다. 본 논문에서는 퍼지 페트리네트와 이 네트에 기반을 둔 규칙 기반시스템을 위한 구간값 퍼지 집합 후진추론 알고리즘을 제안한다. 규칙 기반시스템에 있는 퍼지 생성규칙은 퍼지 페트리네트로 모형화된다. 여기에서 퍼지 생성규칙에 나타나는 퍼지 명제의 확신도와 규칙의 확신도는 구간값 퍼지 집합으로 표현한다. 여기에서 제안한 알고리즘은 목표노드에서 시작노드까지 후진추론 통로를 찾아낸 후 목표노드의 확신도를 계산한다. 구간값 퍼지 집합 후진추론 알고리즘은 규칙 기반 시스템이 더 유연하고 사람들이 하는 것과 같은 퍼지 후진추론을 가능하게 한다.

• 한국치위생학회지
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• 제13권3호
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• pp.411-418
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• 2013

Objectives : The quality of service is considered as the difference between services that customers perceive and expect by using SERVQUAL model and the basic data for the efficiency of management of dental hospital and clinics, the differentiation strategies of dental medical institutions and the improvements on quality of service are provided. Methods : Subjects were 469 patients who visited six dental hospitals and clinics in Daegu-Gyeongbuk regions. Questionnaire consisted of five items such as type, reliability, responsiveness, certainty and empathy properties. Data were analyzed using SPSS 12.0 program in this study. Results : Women had high satisfaction scores of medical services in certainty and empathy properties. 40s and higher had the highest score in the type property. 30s had high score in the certainty property. For expected service satisfaction, 30s had the highest score in dental practitioners and administrative staffs. For reuse of current medical institution and intent for recommendation, certainty property and factor of dentist and dental practitioners had high scores. Additionally, reliability and responsiveness properties were statistically significant. Conclusions : Medical institutions should make every effort to get the dentists or dental practitioners have the medical knowledge at a high level, a kindness for patients and trust from patients.

• 디지털산업정보학회논문지
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• 제9권3호
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• pp.21-30
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• 2013

Powell-Miller theory is a good method to express or treat incorrect information. But it has limitation that requires too much time to apply to actual situation because computational complexity increases in exponential and functional way. Accordingly, there have been several attempts to reduce computational complexity but side effect followed - certainty factor fell. This study suggested expanded Approximation Algorithm. Expanded Approximation Algorithm is a method to consider both smallest supersets and largest subsets to expand basic space into a space including inverse set and to reduce Approximation error. By using expanded Approximation Algorithm suggested in the study, basic probability assignment function value of subsets was alloted and added to basic probability assignment function value of sets related to the subsets. This made subsets newly created become Approximation more efficiently. As a result, it could be known that certain function value which is based on basic probability assignment function is closely near actual optimal result. And certainty in correctness can be obtained while computational complexity could be reduced. by using Algorithm suggested in the study, exact information necessary for a system can be obtained.

• 한국음향학회지
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• 제10권4호
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• pp.38-47
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• 1991

음성인식에 있어서 문제점의 하나는 발성자에 따른 주파수 변동문제이다. 본 논문에서는 이러한 음성 신호의 주파수 특성의 변동에 따른 영향을 해결하기 위하여 fuzzy 이론을 도입하였다. 여기서 표준패턴은 음성신호의 대표적인 특징들을 포함하고 있어야 하므로, 먼저 여러 화자가 발성한 단어들을 벡터 양자화한 코드북을 생성하였으며, 이코드북으로 부터 추출한 피크 주파수와 피크 에너지를 fuzzy화 패턴으로 작성하였다. 입력 음성신호로 부터 추출한 특징량인 스펙트럼의 피크 주파수와 피크에너지를 각각 멤버쉽 함수로 표현하여 fuzzy 추론에 의한 단어인식을 하였다. 실제 확신도 계산에 있어서는 계산량을 줄이기 위하여 fuzzy 값의 차만으로 확신도를 구하는 개선 확신도를 제안하여 사용하였다. 한국어 숫자음을 인식 실험한 결과 주파수 특성의 변동에 따른 영향을 해결할 수 있음을 확인하였으며, 제안된 개선 확신도 계산방법에 의해서 기억용량과 계산량을 감소 시킬 수 있었다.

• 대한원격탐사학회지
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• 제36권1호
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• pp.67-81
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• 2020

The rapid climatic changes being caused by global warming are resulting in abnormal weather conditions worldwide, which in some regions have increased the frequency of landslides. This study was aimed to analyze and compare the landslide susceptibility using the Frequency Ratio (FR), Statistical Index, Weight of Evidence, Certainty Factor, and Index of Entropy (IoE) at Woomyeon Mountain in South Korea. Through the construction of a landslide inventory map, 164 landslide locations in total were found, of which 50 (30%) were reserved to validate the model after 114 (70%) had been chosen at random for model training. The sixteen landslide conditioning factors related to topography, hydrology, pedology, and forestry factors were considered. The results were evaluated and compared using relative operating characteristic curve and the statistical indexes. From the analysis, it was shown that the FR and IoE models were better than the other models. The FR model, with a prediction rate of 0.805, performed slightly better than the IoE model with a prediction rate of 0.798. These models had the same sensitivity values of 0.940. The IoE model gave a specific value of 0.329 and an accuracy value of 0.710, which outperforms the FR model which gave 0.276 and 0.680, respectively, to predict the spatial landslide in the study area. The generated landslide susceptibility maps can be useful for disaster and land use planning.

• The Journal of Asian Finance, Economics and Business
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• 제7권12호
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• pp.515-521
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• 2020

Work motivation is critical for ensuring sustainability of any business firm. Motivated personnel essentially helps an organization achieve its organizational goal and objective. Hence, it has become an essential duty for business managers and management committees to identify the motivating factors that would strongly affect their employees. The purpose of the current research is to identify which are the factors that motivate service employees most at their workplace in Bangladesh. The study has used survey questionnaires to collect data from service employees. Convenience sampling is used for data collection. A total of 240 questionnaires were distributed and 183 completed questionnaires were returned (response rate: 77%). The study used purposeful motivating factors, which are ranked (from 1 to 10) by the service employees according to the significance of the factors. Mean value is applied to determine the most crucial motivating factor, where the factor with lowest mean value is considered as the highest significant motivating factor. Results reveal that job certainty, career growth and advancement opportunity, and quality working environment have been the most crucial and influential motivating factors for the service employees. The study adequately underlines the necessity of motivational factors and provides some guidelines to keep employees motivated.

• 한국산학기술학회논문지
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• 제12권12호
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• pp.5902-5909
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• 2011

본 논문에서는 비디오 데이터에서 확신도 추론을 이용하여 급진적인 화면변환과 점진적인 화면변환을 동시에 검출하는 새로운 방법을 제안한다. 제안된 방법에서 급진적인 화면변환은 컷을 의미하고, 점진적인 화면변환은 페이드 인, 페이드 아웃, 디졸브, 수평 와이프, 수직 와이프, 반도어(Barn Doors), 아이리스 라운드(Iris Round)를 의미한다. 먼저, 각 화면변환을 대표하는 특징을 추출한 후 확신도를 이용하여 특징들을 효과적으로 통합하면서 발생한 화면변환을 추출한다. 실험결과에서는 제안된 방법이 기존의 방법에 비해 여러 가지 종류의 화면변환을 보다 정확하게 추출함을 다양한 비디오 데이터를 이용한 실험을 통해 보여준다.