• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2003.09a
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• pp.162-165
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• 2003

Differential learning relies on the differentiated values of nodes, whereas the conventional learning depends on the values themselves of nodes. In this paper, I elucidate the differential learning in the framework maximum likelihood learning of linear generative model with latent variables obeying random walk. I apply the idea of differential learning to the problem independent component analysis(ICA), which leads to differential ICA. Algorithm derivation using the natural gradient and local stability analysis are provided. Usefulness of the algorithm is emphasized in the case of blind separation of temporally correlated sources and is demonstrated through a simple numerical example.

• Korean Management Science Review
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• v.15 no.2
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• pp.177-200
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• 1998

One of organization's generic functions is the interpretation of events to carry out decision-making activities. In intelligent Data Interpretation System(IDIS), Interpreting is computationally modeled as classification of new data into categories having similar features. We define the Extensional Object Model(ExOM) as a formalism for IDIS. In ExOM, objects and categories are loosely coupled to provide flexibility for both object description and category definition in data gathering and interpretation process. Objects are classified inductively based on exemplars of categories as well as deductively based on category structures.

• Journal of Intelligence and Information Systems
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• v.5 no.1
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• pp.167-186
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• 1999

인터넷 유통업은 기본적으로 대량 트랜잭션 발생을 목표로 한다. 본 논문에서는 인터넷 유통업의 대표적인 형태인 인터넷 쇼핑몰 운영을 위한 내부 프로세스 에이전트를 정의하고 이들의 참조 구축 프레임웍을 제시하고 있다. 인터넷 쇼핑몰의 후방 프로세스를 분석해 보았으며 이를 토대로 다양한 운영층 프로세스 에이전트 유형과 특성을 정의하였다. 또한, 다수의 에이전트로 구성된 프로세스 에이전트팀 조직과 활동 원칙도 제시하였다. 에이전트의 구현을 위해 멀티쓰레딩 기법을 사용하였다. 단순한 데이터 처리를 담당하는 운영층 프로세스 에이전트에 대한 연구는 향후 보다 복잡한 지능을 가진 전략층 프로세스 에이전트에 대한 연구로 발전할 것이다.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1468-1473
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• 2005

In this paper, I proposed the INTelligent Agent System by Kohonen's Self Organizing Neural Network (INTAS). INTAS creates each user's profile from the information. Based on it, learning community grouping suitable to each individual is automatically executed by using unsupervised learning algorithm. In INTAS, grouping and learning are automatically performed on real time by multiagents, regardless of the number of learners. A new framework has been proposed to generate multiagents, and it is a feature that efficient multiagents can be executed by proposing a new negotiation mode between multiagents..

• Korean Journal of Computational Design and Engineering
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• v.16 no.3
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• pp.167-177
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• 2011

This paper describes an ontology-based intelligent CAD system for injection mold design, which has been developed based on a commercial CAD system called Unigraphics and an ontological framework for representing the implicit design knowledge as well as the explicit based on the extended function-behavior-structure (FBS) engineering design model that includes the constraint. The system also provides various convenient solid modeling capabilities for mold design and the design process modeling capability that facilitates mold redesign process.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.04a
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• pp.543-546
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• 2004

기존의 예약 시스템을 보게 되면 주로 뿔을 이용한 정보 검색 및 예약을 하는 일이 많았다. 하지만 요즘 들어서는 사용자들이 웹과 더불어 모바일 디바이스 즉, 핸드폰, PDA(Personal Digital Assistant), 스마트 폰 등의 사용률이 급격하게 증가하고 사회가 급변하게 돌아가기 때문에 언제 어디서든지 접할 수 있는 모바일 디바이스를 이용한 예약 시스템이 필요로 하게 된다. 그렇기 때문에 본 논문에서는 마이크로소프트 사의 닷넷 프레임워크 중에서 모바일 닷넷 프레임워크 또는 컴팩트 프레임워크를 기반으로 한 예약 시스템을 설계 및 구현 해보았다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.193-196
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• 1997

A mobile computing environment has many difference in character from conventional communication over wired network. These include very presents distributed design system based the mobile agent for mobile computing environment. To integrate design resource, we presented ISA(Integration Service Agent, which allows a designer to build integrated application using distributed resources, and to collaborative by exchanging service. Also we propose ICM(XML based Intelligent Connection Manger) using mobile agent. And suggested new intelligent data and process transfer architecture using ICM to implement an agent based design system in mobile environment.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 1996.10a
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• pp.129-132
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• 1996

In this paper, we suggest a framework to represent the fuzziness in knowledge base as a perspective of the object-oriented paradigm. We divide the knowledge base in two parts. One is the object-base that stores the fuzzy propositions and the explanatory databases. The other is the rule-base that manages the rules between the fuzzy propositions. As the first step, we have to develop a new fuzzy object model that gives an easy way to represent the fuzzy propositions, that is, the fuzzy knowledge in the real world.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2005.04a
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• pp.185-188
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• 2005

This paper suggests a control method for efficient topology/parameter evolution in a bond-graph-based GP design framework that automatically synthesizes designs for multi-domain, lumped parameter dynamic systems, We adopt a hierarchical breeding control mechanism with fitness-level-dependent differences to obtain better balancing of topology/parameter search - biased toward topological changes at low fitness levels, and toward parameter changes at high fitness levels. As a testbed for this approach, an eigenvalue assignment problem, which is to find bond graph models exhibiting minimal distance errors from target sets of eigenvalues, was tested and showed improved performance for various sets of eigenvalues.

• Journal of the Korean Institute of Intelligent Systems
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• v.13 no.3
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• pp.355-359
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• 2003

We investigate the properties of fuzzy (semi-)topogenous orders in the framework of fuzzy (supra) topologies and fuzzy (supra) interior operators. We study the relationship between fuzzy (semi-)topogenous structures, fuzzy (supra)topologies and fuzzy (supra)interior operators.