• Journal of Korean Society of Transportation
• /
• v.2 no.1
• /
• pp.89-101
• /
• 1984

오늘날 교통계획분야에서 개별적, 행태론적 선택모형의 사용이 급격히 일반화 되어 가고 있는 추세를 보이고 있다. 이는 종래의 집합적 모형에 비하여, 구조적으로 경제학에서 말하는 이성적 선택행위를 보다 잘 설명하고 있어, 선택행위의 인과관계를 나타낸다고 보여 지기 때문이다. 그러나 이들 모형이 주어진 선택범위내에서의 선택만을 다루고 있어, 선택범 위를 결정하는데 임의성이 내재되어 있을 뿐만 아니라, 선택대상이 많은 경우에는 곤란하다 는 것이 문제점으로 지적되고 있다. 본 논문에서는, 선택행위에 관한 경제학적, 심리학적 이 론에 근거하여 비교적 실용적인 선택범위결정과정을 개발하여 기존의 개별적, 행태론적 모 형과 복합적으로 활용할수 있는 방안을 제시하였다.

• Journal of Energy Engineering
• /
• v.13 no.2
• /
• pp.101-111
• /
• 2004

The main purpose of a liquid metal reactor core thermal-hydraulic design is to efficiently extract the core thermal power by distributing the appropriate sodium coolant flow according to the power distribution in the core. The thermal-hydraulic design procedure consists of the coolant flow distribution to the sub-assemblies, the coolant/fuel temperature calculations and detailed subchannel analysis. This paper describes the LMR core thermal-hydraulic design methodology and summarizes the major design and analysis results of KALIMER breeder and breakeven cores and subassemblies. KALIMER is a 150 MWe rated (392 MWth) heterogeneous core with U-TRU-Zr ternary alloy fuel and sodium coolant.

• Journal of the Korean Institute of Telematics and Electronics C
• /
• v.35C no.9
• /
• pp.29-37
• /
• 1998

In weighted random pattern testing it is an important issue to find the optimal weight sets for achieving a high fault coverage using a small number of weighted random patterns. In this paper, a new weight set optimization algorithm is developed, which can generate the optimal weight sets in an efficient way using the sampling probabilities of deterministic tests patterns. In addition, the simulation based method of finding the proper maximum Hamming distance is presented. Experimental results for ISCAS 85 benchmark circuits prove the effectiveness of the new weight set optimization algorithm and the method of finding the proper maximum Hamming distance.

• Journal of KIISE:Software and Applications
• /
• v.35 no.8
• /
• pp.463-478
• /
• 2008

Due to the high dimensional problem, typically machine learning algorithms have relied on feature selection techniques in order to perform effective classification in microarray gene expression datasets. However, the large number of features compared to the number of samples makes the task of feature selection computationally inprohibitive and prone to errors. One of traditional feature selection approach was feature filtering; measuring one gene per one step. Then feature filtering was an univariate approach that cannot validate multivariate correlations. In this paper, we proposed a function for measuring both class separability and correlations. With this approach, we solved the problem related to feature filtering approach.

• School Mathematics
• /
• v.8 no.2
• /
• pp.177-213
• /
• 2006

It is well known that the set theory is very fundamental and important in modern mathematics. So, the middle school mathematics begins with section 'Sets' which is introduced from the 2nd curriculum change. Therefore, it is natural to arrange the set theory at the beginning of middle school mathematics curriculum. But most of text-books develop the set theory section very rigorously and tightly under less considering the student's language level. The purpose of this study is to have effective learning of set theory section for every middle school students, we analysis the definitions and writing contents of section 'Sets' in each textbooks as a linguistic viewpoint, and investigate its further uses in each textbooks.

• Nuclear Engineering and Technology
• /
• v.18 no.3
• /
• pp.228-237
• /
• 1986

This paper provides a comparative study on methodologies for solutions of the inverse problems of certain basic fuzzy relational equations, with which fuzzy set is defined as mapping from sets into complete Brouwerian lattice. Three different algorithms developed so far are discussed and applied to fault diagnosis problem for the main coolant pump of nuclear power plants.

• Proceedings of the Korea Multimedia Society Conference
• /
• 2001.06a
• /
• pp.103-106
• /
• 2001

최근 들어 인간의 의지를 컴퓨터에 전달하기 위한 수단으로 컴퓨터 시각기반 방식으로 제스처를 인식하고자 하는 연구가 널리 진행되고 있다. 제스처 인식에서 가장 중요한 문제는 실시간 처리로 알고리즘의 단순화와 처리시간의 감소이다. 이러한 문제를 해결하기 위해서 본 연구에서는 기하학적 집합론에 근거하고 있는 수학적 형태론을 적용하였다. 형태론적 형상분해를 적용하여 얻은 손짓 형상의 원시형상 요소들의 방향성은 손짓에 관한 중요한 정보를 내포하고 있으며 이러한 특징에 근거하여 본 연구에서는 주 원시형상 요소와 부 원시형상원소의 중심점을 연결하는 직선으로부터 특징벡터를 이용한 형태론적 제스처 인식 알고리즘을 제안하고 실험을 통하여 그 유용성을 증명한다.

• Proceedings of the Korean Society for Language and Information Conference
• /
• 2002.06a
• /
• pp.153-161
• /
• 2002

본 논문에서는 주제와 초점이 한가지 기준에 의해 분류될 수 있는 것을 보이고자 한다. 이를 위해서 Rooth의 대안 의미론의 요점인 대안 집합이 어떤 방식으로 결정되고 그 대안 집합의 크기가 얼마가 되느냐에 따라서 여러 가지 주제와 초점이 분류되었다 또한 정보초점에 나타나는 초점의 한정성은 초점자체의 본성이라기보다는 이전 발화의 전제에 의한 상호작용의 결과라는 것을 보였고, 대조 초점과 대조주제의 구분을 위하여 대화함축이 일어나는지 여부를 기준으로 이 두 개념을 구분하려고 하였다.

• Journal of the Korean Data and Information Science Society
• /
• v.25 no.2
• /
• pp.281-292
• /
• 2014

As the importance of algorithm trading is getting stronger, researches for artificial intelligence (AI) based trading strategy is also being more important. However, there are not enough studies about using more than two AI methodologies in one trading system. The main aim of this study is development of algorithm trading strategy based on the rough set theory that is one of rule-based AI methodologies. Especially, this study used genetic algorithm for optimizing profit of rough set based strategy rule. The most important contribution of this study is proposing efficient convergence of two different AI methodology in algorithm trading system. Target of purposed trading system is KOPSI200 futures market. In empirical study, we prove that purposed trading system earns significant profit from 2009 to 2012. Moreover, our system is evaluated higher shape ratio than buy-and-hold strategy.

• 한국사회정책
• /
• v.19 no.3
• /
• pp.185-214
• /
• 2012

After the introduction of the three welfare regimes by Esping-Andersen, discussion on 'other' types of welfare regimes was facilitated and the scholarly focus on East Asian economic development gradually shifted to the East Asian welfare states discussion from the late 1990s. Literature on East Asian welfare states increased our understanding on the characteristics of not only the East Asian welfare state as a whole but also of each country in the region. However, compared the attention given to developing variables and empirical studies on the East Asian welfare state, less attention has been given to the concept of East Asian welfare states. Recognizing the limitation in developing comparable variables without a concept analysis of the East Asian welfare states, this study highlights the importance of conceptualization and concept analysis in comparative social policy studies. This paper first discusses on the concepts, conceptualization and on the use of set theory in comparative social policy research. Next, the study argues the validity of 'functional equivalence' in the East Asian welfare state studies and critically reviews the existing literature. Lastly, this paper suggests how the concept of functional equivalence can be successfully employed for the East Asian welfare states studies with a concept analysis and by applying a set theory including the fuzzy set theory.