• Archives of design research
• /
• v.13 no.1
• /
• pp.131-138
• /
• 2000

The evaluation of design is one of the most important steps in design process. However, because in most cases, design evaluation has been disregarded in comparison with other steps and has been performed by designer's subjective judgment. there are few studies for the development of systematic methodology. In this study, we developed the method of design evaluation using the fuzzy theory and the multi-criteria dedsion making model. This method consists of two steps. The first step is to obtain relative importance weights of design evaluation criteria, and the second step is to obtain and integrate scores for design evaluation criteria. AHP(analytic hierarchy process) and fuzzy theory were applied to the first and the second step, respectively. We applied the developed method to the sensible evaluation of cellular phone design. As the result, we verified that the developed method could be effectively used in the evaluation of product design.

• Journal of Intelligence and Information Systems
• /
• v.2 no.2
• /
• pp.1-15
• /
• 1996

전문가의 지식을 지식베이스화하여 의사결정지원시스템으로 사용하려는 노력이 증대하고 있다. 특히 투자의사결정과 같은 원인결과의 관계를 명확히 규정할 수 없는 복작한 영역에서 전문가의 지식베이스는 비전문가의 의사결정에 중요한 조언을 제공할 수 있다. 불확실한 지식을 지식베이스화하는 한 방법으로 퍼지프러덕션시스템이 널리 사용되고 있다. 주식시장과 같은 동태적인 시스템에서 어떤 정보의 중요성은 상황에 따라 변화하는데 이를 정태적인 프로덕션시스템의 규칙으로 지식베이스화하는 것은 불가능하다. 그러나 추론을 수행하는 과정에서 수행당시 각 정보의 중요도에 부응하는 가중치를 부여하여 평가함으로써 정태적인 지식베이스에 동태적인 실제시스템의 특성을 반영할 수 있다. 이는 가중치가 높은 정보에 해당하는 조건명제의 충족정도가 해당규칙의 전체평가결과에 더욱 중요하게 반영되게 하여 좀더 현실성 있는 추론 결과를 얻게 한다. AHP(Analytic Hierachy Process) 방법에 의하여 얻어진 정보의 상대적 중요도에 따른 가중치 (w)를 해당 정보와 조건명제의 합치정도(Degree of Match : DM)에 (DM)w 의 형식으로 적용함으로써 퍼지프러덕션시스템에서 정보의 중요도를 반영하여 프러덕션규칙을 평가하는 방법을 제시한다.

• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.48 no.4
• /
• pp.51-60
• /
• 2011

Authentication model in the wireless environment has many security vulnerabilities. However, there is no adapting standard method in this field. Therefore, we propose a fuzzy logic based authentication model to enhance the security level in the authentication environment. We use fuzzy logic based classification to construct our model, and also additionally utilize improved AHP and case-based reasoning for an appropriate decision making. We compute the context information by using the improved AHP method, use the proposed model to compute the security level for the input data, and securely apply the proposed model to the wireless environment which has diverse context information. We look forward to better security model including cloud computing by extending the proposed method in the future.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2005.11a
• /
• pp.448-451
• /
• 2005

For measuring a traffic symbolic confusion quantity and symbolic air pleasantness, we use fuzzy sensor algorithm maded by symbolic information quantity. But for implementation of fuzzy sensor, we use some symbolic information item, this method cannot produce precise output because we use vague fuzzy rule method and we cannot abundance fuzzy for precision of fuzzy rule method. For this reason this paper introduce new fuzzy sensor algorithm composed of not fuzzy rule method but using Analytic Hierachy Process. To prove that new method is good, two type of fuzzy sensor applied to traffic signal controller and through much passing vehicle, two fuzzy sensor compared each other.

• Proceedings of KOSOMES biannual meeting
• /
• 2004.05b
• /
• pp.1-6
• /
• 2004

This paper suggests an evaluation of risk level for damage of marine accidents in SRRs. Qualitative analyses in words is sometimes priorior to quantative analyses in numeric symbols. This paper intoduces a concept of fuzzy theory with the plenty of related literature review and AHP in the Korean SRRs of RCC and RSC. The methodology of this paper is max . min composition of fuzzy extensive principle, defuzzifiation is centroid of gravity methods. At the result, the evaluation of risk level is especially over Serious for smarine accident of Taean, Gunsan, Mokpo, Yosu, Tongyoung, Busan SRR. This paper recommends that many Rescue Vessels and Equipments need to the reduction of risk level about those.

• Journal of Navigation and Port Research
• /
• v.28 no.10 s.96
• /
• pp.909-915
• /
• 2004

This paper suggests an evaluation of risk level for damage of marine accidents in SRRs. Qualitative analyses in words is sometimes priorior to quantative analyses in numeric symbols. This paper introduces a concept of fuzzy theory with the plenty of related literature riview and AHP in the Korean SRRs of RCC and RSC. The methodology of this paper is $max{\cdot}min$ composition of fuzzy extensive principle, defuzzifiation is centroid of gravity methods. At the result, the evaluation of risk level is especially over Serious for marine accident of Busan SRRs. This paper recommends that many Rescue Vessels and Equipments need to the reduction of risk level about those.

• New & Renewable Energy
• /
• v.4 no.1
• /
• pp.19-24
• /
• 2008

Energy environment has been changing rapidly such as high oil prices and the effectuation of UNFCCC. Oil prices have continued to rise and Dubai crude prices recorded about 90 dollars per barrel in 2007. In addition, the effectuation of UNFCCC will affect Korean economy and national energy security. Korea is the 9th $CO_2$ emissions country and takes the 1st place related to the increase rate of $CO_2$ emissions globally. Energy technology development is a key breakthrough and one of the optimal alternatives to cope with national energy security. In this study, we prioritize energy technologies in the sectors of high oil prices and UNFCCC related to ETRM for well focus R&D and efficiency of finite resources allocations. We applied to the extended method of AHP, fuzzy AHP reflecting the fuzziness of human thoughts and perception, for prioritizing the relative importance among energy technologies in ETRM for the first time as we make an energy policy in Korea.

• 한국신재생에너지학회:학술대회논문집
• /
• 2007.06a
• /
• pp.742-746
• /
• 2007

Energy environment has been changing rapidly such as high oil prices and the effectuation of UNFCCC. Oil prices have continued to rise and Dubai crude prices recorded 60 or 70 dollars per barrel in 2006. In addition, the effectuation of UNFCCC will affect Korean economy and national energy security. Korea is the 9th $CO_2$ emissions country and takes the 1st place related to the increase rate of $CO_2$ emissions globally. Energy technology development is a key breakthrough and one of the optimal alternatives to cope with national energy security. In this study, we prioritize energy technologies in the sectors of high oil prices and UNFCCC related to ETRM for well focus R&D and efficiency of finite resources allocations. We applied to the extended method of AHP, fuzzy AHP reflecting the fuzziness of human thoughts and perception, for prioritizing the relative importance among energy technologies in ETRM for the first time as we make an energy policy in Korea.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2007.11a
• /
• pp.91-95
• /
• 2007

인터넷의 발전과 더불어 유무선 통신 인터페이스의 발전은 가상 인터넷 공간 및 현실세계에서의 사람과 사람 또는 컴퓨터와 컴퓨터사이의 정보전달 뿐만 아니라, 컴퓨터와 사람사이의 양방향 정보전달과 상호작용을 가능하게 하고 있다. 이러한 추세에 맞추어 지능형 디지털 주거 공간의 컴퓨터및 디지털 기기와 연통되어 언제 어디서나 접근 가능한 Ubiquitous Robot은 디지털 사회를 이끌 주요 신산업의 통력이 될 것이다. Ubibot은 스마트센서. 지능형 정보입출력 장치 등을 지니고 다양한 컴퓨터 및 디지털 기기와 스마트 환경센서 등을 제어할수 있고 정보를 전달하는 통신 능력을 지닌다.

• Tunnel and Underground Space
• /
• v.18 no.6
• /
• pp.465-479
• /
• 2008

For the quantitative identification of rock behavior in shallow tunnels, we recommend using the rock behavior index (RBI) by the analytic hierarchy process (AHP) and the Rock Engineering Systems (RES). AHP and RES can aid engineers in effectively determining complex and un-structured rock behavior utilizing a structured pair-wise comparison matrix and an interaction matrix, respectively. Rock behavior types are categorized as rock fall, cave-in, and plastic deformation. Seven parameters influencing rock behavior for shallow depth rock tunnel are determined: uniaxial compressive strength, rock quality designation (RQD), joint surface condition, stress, pound water, earthquake, and tunnel span. They are classified into rock mass intrinsic, rock mass extrinsic, and design parameters. An advantage of this procedure is its ability to obtain each parameter's weight. We applied the proposed method to the basic design of Seoul Metro Line O and quantified the rock behavior into RBI on rock fall, cave-in, and plastic deformation. The study results demonstrate that AHP and RES can give engineers quantitative information on rock behavior.