• 한국컴퓨터정보학회논문지
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• 제24권2호
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• pp.171-177
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• 2019

This paper aims to find the most effective feature selection method for the sake of opinion mining tasks. Basically, opinion mining tasks belong to sentiment analysis, which is to categorize opinions of the online texts into positive and negative from a text mining point of view. By using the five product groups dataset such as apparel, books, DVDs, electronics, and kitchen, TF-IDF and Bag-of-Words(BOW) fare calculated to form the product review feature sets. Next, we applied the feature selection methods to see which method reveals most robust results. The results show that the stacking classifier based on those features out of applying Information Gain feature selection method yields best result.

• 시스템엔지니어링학술지
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• 제15권1호
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• pp.9-15
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• 2019

DIRCM is a device that deception missiles by directing the light source to missile seeker with infra-red laser based turret. The effectiveness of the device is affected by changes of the turret's Field of View (FoV), and also influence of the interference devices determines the effect of the DIRCM's effectiveness. Therefore finding mounting location for DIRCM is critical parameter for the DIRCM's effectiveness. so we applied stiffness review, interference analysis, FoV analysis and simulation analysis method to Multi-purpose helicopter for the find DIRCM location. As a result, in case of 1 DIRCM mounted at helicopters bottom shows 30~40% survivability. case of 2 DIRCM mounted at both side shows 70~80% survivability.

• 한국안전학회지
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• 제20권4호
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• pp.63-70
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• 2005

It has been used so many kinds of architectural materials and interior products in current building construction, and use of composite architectural materials is increasing with the development of chemical technology. As the green architecture has become the center of public interest, much effort is conducted in advanced countries on the LCA point of view, such as restriction of architectural materials that emitting pollution substances, developing of Non-Toxic architectural materials, and recycling of used materials, etc. with the cooperation of related organizations, material manufacture companies, and construction companies. Because the kinds of materials to be used in building constructions are so various, there might be some possibility of personal and subjective choice at the time of materials selection resulting the missing the requirements of building components and the choice of harmful materials to human. One way to resolve the material problem is to present the green architectural materials which coincide with the quality performance at service and not harmful to man and nature. At this point of view, this study aims to develop the material classification model by investigating the major labelling system about green architectural materials in both domestic and abroad and to implement an efficient material selection system by making a powerful database of environmental standard and quality basis of building requirements.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.253-259
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• 2006

Since townscape planning zones were introduced in 2000 by a revised Urban Planning Law, interest and understanding on townscape have been enhanced in Korea. Driven by this trend of the time, interest in townscape planning has been growing in the area of urban planning, and local governments have been expressing their interest in townscape management. This study is intended to provide criteria for setting goals of constructing desirable urban environments in harmony with existing condition in Chung-ju City. To this end, questionnaire surveys and awareness research were administered and following findings were obtained in relation to user-specific preferences on view targets and view points for townscape planning in Chung-ju City. In general, citizens of Chung-ju City were found to prefer townscape frequently in use practically, while residents in other areas preferred such townscape as linked with the city' s overall reputation. Both groups were found to prefer natural landscape (Gaemyeongsan, Namsan, etc.) to artificial one as a view target, and Chung-ju Terminal and the neighborhoods and downtown(Seongseo-dong) were presumably preferred as a view point.

• 한국콘텐츠학회논문지
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• 제15권12호
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• pp.24-34
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• 2015

시맨틱 웹의 발전과 함께 RDF 데이터에 대한 사용이 증가되고 있다. RDF 데이터는 트리플로 구성되어 있으며 질의 처리 시 높은 조인 비용이 요구된다. 실체 뷰는 질의 처리 비용을 감소시키는 기법으로 알려져 있다. 실체 뷰는 질의 처리의 결과 또는 중간 결과를 저장 공간 내부에 물리적으로 저장하여 질의 처리 시 전체 데이터베이스의 접근이 아닌 실체 뷰의 접근으로 질의를 처리한다. 본 논문에서는 이를 해결하기 위해 의사 결정 트리를 사용하여 실체 뷰를 선택한다. 제안하는 기법은 의사 결정 트리를 통해 질의 처리시간뿐만 아니라 실체 뷰의 크기 및 유지비용을 고려한다. 성능평가를 통해 제안하는 기법이 기존 기법에 비해 제한된 저장 공간에서의 실체 뷰는 증가하였고 동일 개수의 실체 뷰의 유지비용은 감소함을 보인다.

• 산업경영시스템학회지
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• 제14권24호
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• pp.163-168
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• 1991

In the FMS design, the important points are the selection of parts and the determination of configuration. The common approach method which solve the selection of parts are the determination of configuration has improved that the two points are simultaneously. This study finds the best method which parts combination and configuration are satisfied at the same time. And the optimal replace time of equipment under limited budget on the view Point of engineering. economy.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 추계학술대회 논문집
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• pp.560-567
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• 1998

The pitch of spot-weld is a important variable in a view of both production cost and strength of car-body. Various renditions for the selection of pitches have been researched and especially in this paper the buckling analysis is carried out for the 2-sheet pannel structures. The optimal pitch is obtained by optimization program and FEM, which can enhance the buckling strength.

• 한국조경학회지
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• 제39권3호
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• pp.39-50
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• 2011

본 연구는 개발 사업의 경관평가에 있어 객관적이고 구체적인 조망점 선정기준 및 방법을 제시함으로써 올바른 경관평가 및 계획 수립의 기초자료를 제공하였다. 연구결과를 요약하면, 먼저 선행연구를 바탕으로 조망점 선정기준인 조망성, 공공성 및 경관변화성을 설정하였으며, 각각의 선정기준의 평가지표를 구축하였다. 조망성의 경우 거리와 방향에 따라 경관변화와 실제 조망 가능한 지역을 추출하기 위해 시거리, 조망방향, 지형요소, 가시권을 평가지표로 하여 GIS를 통해 분석하였으며, 공공성은 공적 활동이 일어나는 장소로 행정시설, 교육시설 등 13개 평가지표를 설정하고, AHP 분석을 통해 지표별 중요도를 바탕으로 공공성을 분석하였다. 마지막으로 경관변화성은 대상지의 조성 전후 자연경관의 변화율을 분석하였다. 이러한 선정기준을 실제 사례지에 적용하기 위해 먼저 조망성 및 공공성의 분석 결과를 중첩하여 예비조망점을 선정하고, 각각의 예비조망점에서 경관변화성을 분석하여 경관 변화가 큰 지역을 중심으로 최종 조망점을 선정하는일련의 과정을 구축하였다. 조망점 선정기준을 대구광역시 삼덕3 주거개선지구에 적용한 결과, 조망성은 남쪽 원경지역이 가장 넓은 범위에서 대상지를 조망할 수 있는 것으로 나타났으며, 공공성은 5차선 이상의 도로가 가장 넓은 면적을 가지는 것으로 분석되었다. 다음으로, 조망성 및 공공성을 중첩 분석하여 총 48개의 예비 조망점을 설정하였으며, 각각의 예비 조망점에서 경관변화성을 분석한 결과, 삼덕동 우체국 지점이 28.07%로 가장 큰 경관변화율을 가지는 것으로 분석되었다. 최종적으로 근경, 중경, 원경지역에서 각각 3개씩 총 9개의 조망점을 선정하였다. 이러한 일련의 과정을 통해 선정된 조망점은 다수의 전문가 의견이 반영되었으며, GIS 프로그램을 활용하는 등 일련의 과정을 통해서 선정되었기 때문에 경관평가의 객관성을 확보할 수 있을 것으로 판단된다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.98-101
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• 2003

To classify desired and undesired documents on the web according to each user's view, FOCUS (Fuzzy dOCUment ordering System) is developed based on fuzzy concept extraction, fuzzy fish eye matching, and fuzzy selection. Experiments are done using the concept-system-dictionary by EDR (Electronic Dictionary Research Institute) including 140,000 words and web-based documents related to movie.

• 대한전자공학회논문지SP
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• 제41권3호
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• pp.121-127
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• 2004

This paper presents a new vertex selection scheme for shape approximation. In the proposed method, final vertex points are determined by "two-step procedure". In the first step, initial vertices are simply selected on the contour, which constitute a subset of the original contour, using conventional methods such as an iterated refinement method (IRM) or a progressive vertex selection (PVS) method In the second step, a vertex adjustment Process is incorporated to generate final vertices which are no more confined to the contour and optimal in the view of the given distortion measure. For the optimality of the final vertices, the dynamic programming (DP)-based solution for the adjustment of vertices is proposed. There are two main contributions of this work First, we show that DP can be successfully applied to vertex adjustment. Second, by using DP, the global optimality in the vertex selection can be achieved without iterative processes. Experimental results are presented to show the superiority of our method over the traditional methods.