• Title, Summary, Keyword: Network structure

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Modified elman neural network structure for nonlinear system identification (비선형 시스템 식별을 위한 수정된 elman 신경회로망 구조)

  • 정경권;권성훈;이인재;이정훈;엄기환
    • Proceedings of the IEEK Conference
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    • pp.917-920
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    • 1998
  • In this paper, we propose a modified elman neural network structure for nonlinear system identification. The proposed structure is that all of network output feed back into hidden units and output units. Learning algorithm is standard back-propagation algorithm. The simulation showed the effectiveness of using the modified elman neural network structure in the nonlinear system identification.

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A Physical Architecture of Management Network for High-speed Transferring of Management Information (신속한 관리정보 전송을 위한 관리 망 물리구조)

  • 송명규
    • Journal of Internet Computing and Services
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    • v.3 no.2
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    • pp.57-67
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    • 2002
  • The main goal of this paper is to establish the management network structure by adopting TMN concept. Hence, the management network structure consists in layers; from management application layer to lower physical layer In this paper, TMN-DCN structure is designed. That means, since the current communication network technology has developed so fast and new and more diverse communication networks have appeared, There is a need to process each management information in fast manner, The design method of management network physical structure that enhances the efficiency in network management with prompt transmission and reception of management information is proposed and the architecture is designed as well. Although there is some increase in installation fee for total link that constitutes the physical structure in lower physical layer. network management can be promptly implemented since the structure that can transfer the management information fastest is proposed.

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A Comparative Study on the Buckling Characteristics of Single-layer and Double-layer Spherical Space Frame Structure with Triangular Network Pattern (삼각형 네트워크를 갖는 단층 및 복층 구형 스페이스 프레임 구조물의 좌굴특성에 관한 비교 연구)

  • 이호상;정환목;권영환
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.251-257
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    • 1998
  • Spherical space frame structure with triangular network pattern, which has the various characteristics for the mechanic property, a funtional property, an aesthetic property and so on, has often been used as one of the most efficient space structures. It is expected that this type will be used widely in large-span structural roofs. But because this structure is made of network by combination of line elements there me many nodes therefore, the structure behavior is very complicated and there can be an overall collapse of structure by buckling phenomenon if the external force reaches a limitation. This kind of buckling is due to geometric shape, network pattern, the number of layer and so on, of structure. Therefore spherical space frame with triangle network pattern have attracted many designers and researchers attention all over the world. The number of layer of space frame is divided in to the simgle, double, multi layer. That is important element which is considered deeply in the beginning of structural design. The buckling characteristics of single-layer model and double-layer model for the spherical space frame structure with triangular network pattern are evaluated and the buckling loads of these types are compared with investigation their structural efficiency in this study.

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Interaction Effect of Network Structure and Knowledge Search on Knowledge Diffusion (지식 전파에 있어 네트워크 구조와 지식 탐색의 상호작용)

  • Park, Chulsoon
    • Korean Management Science Review
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    • v.32 no.4
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    • pp.81-96
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    • 2015
  • This paper models knowledge diffusion on an inter-organizational network. Based on literatures related to knowledge diffusion, the model considers critical factors that affect diffusion behavior including nodal property, relational property, and environmental property. We examine the relationships among network structure, knowledge search, and diffusion performance. Through a massive simulation runs based on the agent-based model, we find that the average path length of a network decreases a firm's cumulative knowledge stock, whereas the clustering coefficient of a firm has no significant relationship with the firm's knowledge. We also find that there is an interaction effect of network structure and the range of knowledge search on knowledge diffusion. Specifically, in a network of a larger average path length (APL) the marginal effect of search conduct is significantly greater than in that of a smaller APL.

Network Type Distributed Control of a System with Inner Loop Control Structure (내부 궤환 제어 구조를 갖는 시스템의 네트워크형 분산 제어)

  • Choi, Goon-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.2
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    • pp.100-108
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    • 2014
  • In this paper, an idea of a network type distributed control of a system with inner loop control structure will be considered. Generally, in case of a control system with inner loop control structure, it is not easy to implement circuits and programming. Using network type distributed control structure, it will show how it is better than before. CAN(Controller Area Network) protocol which has been known that it has a high reliability on the signal in the various network protocols is used. Also, Arago's Disk System which has a inner loop control stucture is made to validate effectiveness of the proposed method.

Intelligent system using frame function in wavelet neural network (웨이브릿 신경회로망의 프레임 함수를 이용한 지능시스템)

  • 홍석우;김용택;연정흠;전홍태
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.195-198
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    • 2000
  • We propose a new wavelet neural network structure, for which we apply new recurrent nodes to the network, in this paper for the dynamic system identification and control. We will construct the wavelet neural network by using wavelet frame function. The function does not have the best approximation property, but it may be possible to apply some modification to the structure of the network because the constriction of orthogonality is loosened a little. This wavelet neural network we propose can obtain previous state information by its structure of the network without any addition of input, though the conventional wavelet network needs additional previous state input for the improvement of the dynamic performance. In numerical experience, the performance of the new wavelet neural network we propose in the nonlinear system with uncertainity of parameter Is equal to that of the wavelet network which used the additional previous information input, superior to that of the conventional wavelet network.

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A Study on the Management Performance Depends on the Supply Chain Structure (공급사슬구조에 따른 경영성과에 관한 연구)

  • Jang Hyeong-Wook;Lee Sang-Shik
    • Journal of the Korea Industrial Information Systems Research
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    • v.10 no.4
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    • pp.110-119
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    • 2005
  • This study develops three dimensions of a supply chain structure (i.e., supply network, conversion network, distribution network) and proposes a balanced scorecard (BSC) model in order to measure management performance. We may conclude that management performance depends on the supply chain structure, and performance of distribution network is better than that of supply and conversion networks based on the result of Scheff multi-comparison.

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Efficiency of the Hierarchical Structure for a Bus Network (시내버스 노선망 위계구조의 효율성 분석 (대전시 사례분석을 중심으로))

  • Lee, Beom-Gyu;Jang, Hyeon-Bong
    • Journal of Korean Society of Transportation
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    • v.27 no.3
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    • pp.49-58
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    • 2009
  • Four alternative plans for the bus network in Daejeon metropolitan city, which have different hierarchical structure, were proposed : Alternative 1 represents a bus network without hierarchical structure, and Alternative 2, 3, and 4 represent bus networks with primary, intermediate, and advanced hierarchical structures, respectively. Efficiency of the alternative plans were evaluated based on the evaluation index including travel time cost, waiting time cost, and transition penalty cost. The travel time cost was decreased as the level of hierarchical structure gets higher until it reaches the extremely high level. As the level of hierarchical structure get higher, the waiting time cost significantly decreased while the transition penalty cost increased. Collectively, a bus network with hierarchical structure was shown to be more efficient than without it in the light of total travel cost. For the bus network with hierarchical structure, total travel cost shows a concave curve, which implies that there exists an optimal level of hierarchical structure in a bus network.

The Structure of Assure Information Security In Mobile Environment Based Mobile PKI (모바일 PKI 기반의 이동 보안 구조)

  • 서세영;신승수;최승권;조용환
    • Proceedings of the Korea Contents Association Conference
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    • pp.132-139
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    • 2003
  • In this paper, we design and implement the public key certification the structure of assure information security which play an important role in PKI (Public Key Infrastructure). The structure of assure information security consists of Root-CA, Home-network and Foreign-network. CA will going to gave the mandate to Home-Agent or Foreign-Agent when they request. The structure of assure information security is various characteristic : more then high speed, mobile network, and low cost more then previous structure of assure information security.

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A study on the improvement of thermostability and dielectric breakdown strength for packaging and impregnating epoxy composite materials for electrical machines and apparatus (전기 기기용 봉지 및 함침 에폭시 복합 재료의 내열성 및 절연파괴 특성 개선에 관한 연구)

  • 김명호;김재환
    • Electrical & Electronic Materials
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    • v.7 no.6
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    • pp.527-533
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    • 1994
  • In this study, it was studied on dielectric breakdown strength and thennostability properties due to the structure variation of matrix resin and treatment of coupling agent of epoxy insulating materials. The interpenetrating network structure was formed by simultaneous heating curing the epoxy resin with single network structure and the methacrylic acid resin. Also inner structure was observed and the glass transition temperature was measured on these three type specimens. Dielectric breakdown properties were investigated by applying DC, AC and impulse voltage. As a result, the glass transition temperature and the dielectric breakdown strength of specimen with interpenetrating network structure was more higher than another two type specimens.

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