• Transactions on Control, Automation and Systems Engineering
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• 제4권3호
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• pp.239-243
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• 2002

Multi-valued decision making for transitional stochastic events was newly derived based on conditional probability of knowledge database which included experts'knowledge and experience. The proposed multi-valued decision making was successfully adopted to the determination of the five levels of the vigilance of a subject during the EEG (electroencephalogram) recording; awake stage (stage W), and sleep stages (stage REM (rapid eye movement), stage 1, stage 2, stage $\sfrac{3}{4}$). Innovative feature of the proposed method is that the algorithm of decision making can be constructed only by use of the knowledge database, inspected by experts. The proposed multi-valued decision making with a mathematical background of the probability can also be applicable widely, in industries and in other medical fields for purposes of the multi-valued decision making.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.493-493
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• 2000

Multi-valued decision making for transitional stochastic events was newly derived based on conditional probability of database. The two values (on-off) decision making method without transition had been proposed by one of the author in a previous work for a purpose of realizing human on-off decision making. The current method is an extension of the previous on-off decision making. By combining the conditional probability and the transitional probability, the closed form of the algorithm for the multi-valued transitional decision making was derived. The proposed multi-valued decision making was successfully applied to the determination of the five levels of the vigilance of a subject during the EEG recording; awake stage, drowsy stage and sleeping stages (stage 1, stage 2/3, REM (rapid eye movement)). The method for determining the vigilance level can be directly usable for the two purposes; selection of awake EEG segments for automatic EEG interpretation, and determination of sleep stages through sleep EEG. The proposed multi-valued decision making with a mathematical background of the probability can be applicable widely, in industries and in medical fields for purposes of the multi-valued decision making.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제10권4호
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• pp.287-295
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• 2010

Based on the interval-valued intuitionistic fuzzy hybrid geometric (IIFHG) operator and the interval-valued intuitionistic fuzzy weighted geometric (IIFWG) operator, we investigate the group decision making problems in which all the information provided by the decision-makers is presented as interval-valued in tuitionistic fuzzy decision matrices where each of the elements is characterized by interval-valued intuitionistic fuzzy numbers, and the information about attribute weights is partially known. Anumerical example is used to illustrate the applicability of the proposed approach.

• 한국지능시스템학회:학술대회논문집
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• 한국지능시스템학회 2008년도 춘계학술대회 학술발표회 논문집
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• pp.29-32
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• 2008

Based on the interval-valued intuitionistic fuzzy hybrid geometric (IIFHG) operator and the interval-valued intuitionistic fuzzy weighted geometric (IIFWG) operator, we investigate the group decision making problems in which all the information provided by the decision-makers is presented as interval-valued intuitionistic fuzzy decision matrices where each of the elements is characterized by interval-valued intuitionistic fuzzy numbers, and the information about attribute weights is partially known. A numerical example is used to illustrate the applicability of the proposed approach.

• Journal of Information Processing Systems
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• 제14권5호
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• pp.1215-1224
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• 2018

Interval-valued neutrosophic hesitant fuzzy set (IVNHFS) is an extension of neutrosophic set (NS) and hesitant fuzzy set (HFS), each element of which has truth membership hesitant function, indeterminacy membership hesitant function and falsity membership hesitant function and the values of these functions lie in several possible closed intervals in the real unit interval [0,1]. In contrast with NS and HFS, IVNHFS can be more flexibly used to deal with uncertain, incomplete, indeterminate, inconsistent and hesitant information. In this study, I propose the novel correlation coefficient of IVNHFSs and my paper discusses its properties. Then, based on the novel correlation coefficient, I develop an approach to deal with multi-attribute decision-making problems within the framework of IVNHFS. In the end, a practical example is used to show that the approach is reasonable and effective in dealing with decision-making problems.

• Journal of Information Processing Systems
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• 제14권3호
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• pp.790-800
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• 2018

The simplified neutrosophic set (SNS) is a generalization of fuzzy set that is designed for some practical situations in which each element has truth membership function, indeterminacy membership function and falsity membership function. In this paper, we propose a new method to construct similarity measures of single valued neutrosophic sets (SVNSs) and interval valued neutrosophic sets (IVNSs), respectively. Then we prove that the proposed formulas satisfy the axiomatic definition of the similarity measure. At last, we apply them to pattern recognition under the single valued neutrosophic environment and multi-criteria decision-making problems under the interval valued neutrosophic environment. The results show that our methods are effective and reasonable.

• Journal of Electrical Engineering and Technology
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• 제8권1호
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• pp.53-63
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• 2013

To guide the decision making of the expert engineer specialized in power system operation and control; the practical OPF solution should take in consideration the critical situation due to severe loading conditions and fault in power system. Differential Evolution (DE) is one of the best Evolutionary Algorithms (EA) to solve real valued optimization problems. This paper presents simple Differential Evolution (DE) Optimization algorithm to solving multi objective optimal power flow (OPF) in the power system with shunt FACTS devices considering voltage deviation, power losses, and power flow branch. The proposed approach is examined and tested on the standard IEEE-30Bus power system test with different objective functions at critical situations. In addition, the non smooth cost function due to the effect of valve point has been considered within the second practical network test (13 generating units). The simulation results are compared with those by the other recent techniques. From the different case studies, it is observed that the results demonstrate the potential of the proposed approach and show clearly its effectiveness to solve practical OPF under contingent operation states.

• 한국산업정보학회논문지
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• 제16권2호
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• pp.111-124
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• 2011

주택유형 중 아파트의 비중이 지속적으로 증가하고 있으며, 자산가치 중 하나로 아파트가 중요하게 평가받고 있다. 또한 인터넷과 같은 정보시스템을 이용한 정보검색이 활발한 상황이다. 그러나 지금까지 부동산 정보시스템에 대한 사용자 만족도가 높지 않고, 부동산 검색의 효율성을 증가시킬 수 있는 시스템적 접근이 부족한 실정이다. 본 연구에서는 이러한 아파트의 자산가치를 평가하는 세부적 요인이 무엇인지를 기존의 문헌을 통해 정리하였으며, 이러한 세부적 요인을 검색조건으로 통합 고려할 수 있는 지식정보 시스템을 설계하고 개발하는데 목적을 두었다. 가격, 면적 뿐 아니라 학군과 주거의 편리성, 주택관리의 용이성을 함께 고려하여 사용자가 선호하는 아파트를 검색결과로 도출해 주도록 설계하였다. 검색조건에 대한 선호도를 분석하기 위해 공인중개사로 구성된 전문가 집단을 대상으로 설문조사를 실시하였으며, 결과를 AHP 기법으로 분석하였다. 또한 본 지식정보시스템은 매수인의 입장에서 가장 편리하게 이용할 수 있도록, 사람이 사용하는 부동산 검색조건을 기계가 이해할 수 있는 시맨틱 웹 검색기반의 정보시스템으로 구성하였다. 이를 위해 아파트 온톨로지를 구축하여 아파트 정보에 대한 다양한 용어를 표준화하였다. 부동산 지식 정보시스템의 전체 아키텍처를 설계한 뒤, 실제 아파트 매물 정보를 이용하여 검색질의를 하였으며, 검색결과를 다요소 의사결정 (Multi-attribute Decision Making)을 통해 분석하였다. 다요소 의사결정을 통해 전문가 집단과 매수인의 선호도에 가중치를 부여하였으며, 검색 후 엔트로피(Entropy) 분석을 통해 사용자가 만족하는 아파트 후보지를 검색결과로 도출하였다. 이를 통해 매수인의 아파트에 대한 가치만족도는 높이면서 탐색비용을 절감시킬 수 있을 것으로 기대한다.