• 제목/요약/키워드: Extend Model

검색결과 763건 처리시간 0.032초

연안어업의 어업피해율 추정 및 어업처분결정 모형 연구 (Economic Models for Evaluating Fisheries Damages and Fisheries Administrative Measures for Coastal Fisheries)

  • 김기수;강용주
    • 수산경영론집
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    • 제31권2호
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    • pp.11-26
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    • 2000
  • The study tries to extend the Kang and Kim's model(1997) for evaluating fisheries damages caused by a large scale coastal reclamation. The paper tries to suggest a more generalized model by adopting new applicable variables such as the decreasing rate of production quantity amount and decreasing numbers of variables for simplification and derivation of quantative results. The paper also tries to suggest the decision model for fisheries administrative measures on the basis of the degree of damages.

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바이어스항이 있는 GBAM 모델을 이용한 양방향 연상메모리 구현 (Implementation of Bidirectional Associative Memories Using the GBAM Model with Bias Terms)

  • 임채환;박주영
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2001년도 춘계학술대회 학술발표 논문집
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    • pp.69-72
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    • 2001
  • In this paper, we propose a new design method for bidirectional associative memories model with high error correction ratio. We extend the conventional GBAM model using bias terms and formulate a design procedure in the form of a constrained optimization problem. The constrained optimization problem is then transformed into a GEVP(generalized eigenvalue problem), which can be efficiently solved by recently developed interior point methods. The effectiveness of the proposed approach is illustrated by a example.

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LARGE TIME CONVERGENCE FOR A CHEMOTAXIS MODEL WITH DEGENERATE LOCAL SENSING AND CONSUMPTION

  • Philippe Laurencot
    • 대한수학회보
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    • 제61권2호
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    • pp.479-488
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    • 2024
  • Convergence to a steady state in the long term limit is established for global weak solutions to a chemotaxis model with degenerate local sensing and consumption, when the motility function is C1-smooth on [0, ∞), vanishes at zero, and is positive on (0, ∞). A condition excluding that the large time limit is spatially homogeneous is also provided. These results extend previous ones derived for motility functions vanishing algebraically at zero and rely on a completely different approach.

Numerical Analysis of Si-based Photovoltaic Modules with Different Interconnection Methods

  • Park, Chihong;Yoon, Nari;Min, Yong-Ki;Ko, Jae-Woo;Lim, Jong-Rok;Jang, Dong-Sik;Ahn, Jae-Hyun;Ahn, Hyungkeun
    • Transactions on Electrical and Electronic Materials
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    • 제15권2호
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    • pp.103-111
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    • 2014
  • This paper investigates the output powers of PV modules by predicting three unknown parameters: reverse saturation current, and series and shunt resistances. A theoretical model using the non-uniform physical parameters of solar cells, including the temperature coefficients, voltage, current, series and shunt resistances, is proposed to obtain the I-V characteristics of PV modules. The solar irradiation effect is included in the model to improve the accuracy of the output power. Analytical and Newton methods are implemented in MATLAB to calculate a module output. Experimental data of the non-uniform solar cells for both serial and parallel connections are used to extend the implementation of the model based on the I-V equation of the equivalent circuit of the cells and to extend the application of the model to m by n modules configuration. Moreover, the theoretical model incorporates, for the first time, the variations of series and shunt resistances, reverse saturation current and irradiation for easy implementation in real power generation. Finally, this model can be useful in predicting the degradation of a PV system because of evaluating the variations of series and shunt resistances, which are critical in the reliability analysis of PV power generation.

Generic Modeling System 개발 및 응용사례 (Generic Modeling System)

  • 조유정;임기수;나재일;이장열
    • 한국CDE학회지
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    • 제3권3호
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    • pp.36-45
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    • 1997
  • This paper presents the research on the development of Generic modeling system as a 3D CAD customizing system for the elevator design. This system enables to create a generic model which gives birth to many models. The generic model is expressed as a non-scale model or a standard model in this paper. Using the parametric design techniques, all their relationships are explicitly represented in the tables, not represented in implicit embedded coding. Owing to this method, designers can easily extend the generic model to contain more model families. All parametric relations are stored in relational database. A designer can retrieve various models from a generic model automatically, by using some key input values.

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Sentence model based subword embeddings for a dialog system

  • Chung, Euisok;Kim, Hyun Woo;Song, Hwa Jeon
    • ETRI Journal
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    • 제44권4호
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    • pp.599-612
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    • 2022
  • This study focuses on improving a word embedding model to enhance the performance of downstream tasks, such as those of dialog systems. To improve traditional word embedding models, such as skip-gram, it is critical to refine the word features and expand the context model. In this paper, we approach the word model from the perspective of subword embedding and attempt to extend the context model by integrating various sentence models. Our proposed sentence model is a subword-based skip-thought model that integrates self-attention and relative position encoding techniques. We also propose a clustering-based dialog model for downstream task verification and evaluate its relationship with the sentence-model-based subword embedding technique. The proposed subword embedding method produces better results than previous methods in evaluating word and sentence similarity. In addition, the downstream task verification, a clustering-based dialog system, demonstrates an improvement of up to 4.86% over the results of FastText in previous research.

객체지향기법을 이용한 관개블럭 모의조작에 관한 연구 - 객체 및 운용프로그램의 개발 - (A Study on the Simulation of Irrigation Block using Object Oriented Programming)

  • 김경준;정하우
    • 한국농공학회:학술대회논문집
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    • 한국농공학회 1998년도 학술발표회 발표논문집
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    • pp.71-76
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    • 1998
  • Water management objects was developed using the Object Oriented Programming (OOP) concept and Irrigation Block Simulation Model was developed using these objects. This model using OOP can simulate the behavior of the irrigation block composed of several irrigation canals, drainage canals, paddy fields, check gates, and so on. This study showed that using OOP concept, we can develop an water management application or extend the function of existing application more easily.

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충격파-와동 간섭 및 음향 방사에 대한 수치 모델 (A Computational Model on Shock-Vortex Interaction and Acoustic Radiation)

  • 장세명;이수갑;장근식
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2000년도 춘계 학술대회논문집
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    • pp.45-50
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    • 2000
  • We study a conceptual numerical model on shock-vortex interaction setting an impulsive shock in a compressible vertex. Navier-Stokes equations are solved for the investigation of interactive structure and acoustic wave propagation. The rotationally symmetric vortex enforces two compression-expansion pairs resultantly forming a quadrupolar shape. These compressive and expansive waves cylindrically propagate to the far field and turn to acoustic waves. Using a fine uniform Cartesian grid system and a TVD-high resolution method, the flow data irl: precisely obtained to extend our interest to the sound source.

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4절기구를 가진 유연한 조작기의 기호적 모델링 (Symbolic modeling of a 4-bar link flexible manipulator)

  • 이재원;주해호
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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    • pp.559-564
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    • 1993
  • Nonlinear equation of motion of the flexible manipulator are derived by the Lagrangian method in symbolic form to better understand the structure of the dynamic model. The resulting equations of motion have a structure which is useful to reduce the number of terms calculated, to check correctness, or to extend the model to high order. A manipulator with a flexible 4 bar link mechanism is a constrained system whose equations are sensitive to numerical integration error. This constrained system is solved using the null space matrix of the constraint Jacobian matrix. Singular value decomposition is a stable algorithm to find the null space matrix.

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영상 기반 자율적인 Semantic Map 제작과 로봇 위치 지정 (Vision-based Autonomous Semantic Map Building and Robot Localization)

  • 임정훈;정승도;서일홍;최병욱
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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    • pp.86-88
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    • 2005
  • An autonomous semantic-map building method is proposed, with the robot localized in the semantic-map. Our semantic-map is organized by objects represented as SIFT features and vision-based relative localization is employed as a process model to implement extended Kalman filters. Thus, we expect that robust SLAM performance can be obtained even under poor conditions in which localization cannot be achieved by classical odometry-based SLAM

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