• 제목/요약/키워드: conceptual structures

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Conceptual design of buildings subjected to wind load by using topology optimization

  • Tang, Jiwu;Xie, Yi Min;Felicetti, Peter
    • Wind and Structures
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    • 제18권1호
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    • pp.21-35
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    • 2014
  • The latest developments in topology optimization are integrated with Computational Fluid Dynamics (CFD) for the conceptual design of building structures. The wind load on a building is simulated using CFD, and the structural response of the building is obtained from finite element analysis under the wind load obtained. Multiple wind directions are simulated within a single fluid domain by simply expanding the simulation domain. The bi-directional evolutionary structural optimization (BESO) algorithm with a scheme of material interpolation is extended for an automatic building topology optimization considering multiple wind loading cases. The proposed approach is demonstrated by a series of examples of optimum topology design of perimeter bracing systems of high-rise building structures.

언어네트워크분석을 이용한 야외지질학습 전후의 퇴적암에 대한 개념 구조 변화 분석 (An Analysis of the Changes of High School Students' Conceptual Structure about Sedimentary Rocks before and after the Field Trip using the Semantic Network Analysis)

  • 박경진;정덕호;조규성
    • 한국지구과학회지
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    • 제34권2호
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    • pp.173-186
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    • 2013
  • 본 연구의 목적은 언어네트워크분석을 이용하여 야외지질학습에서 학생들의 퇴적암에 대한 개념 구조 변화를 알아보기 위한 것이다. 이를 위하여 고등학생 15명을 대상으로 퇴적암에 대한 정의, 분류, 생성과정 및 특징을 묻는 개방형 문항을 개발하였으며, 이 텍스트 자료를 언어네트워크분석법을 통해 분석하였다. 그 결과 첫째, 야외지질학습을 통해 학생들의 퇴적암에 대한 개념 구조는 사전에 비해 사후에 크게 확장되었다. 둘째, 학생들의 개념 구조를 구성하는 하위 클러스터는 서로 긴밀하게 연결되어 있는 '작은 세상 네트워크'를 형성하였다. 셋째, 학생들의 개념 구조의 규모는 수개월이 지난 후 감소하였지만, 하위 클러스터의 연결 상태는 그대로 유지하고 있었다.

담화 내 계층 구조의 개념 구조적 기술 (Conceptual Description of Hierarchical Structure in Discourse)

  • 구유선
    • 인지과학
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    • 제11권3_4호
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    • pp.23-32
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    • 2000
  • 과거 서술 연구 중심의 주구조와 부구조의 차이는 적절하고 형식적인 정의가 부족하다. 본 연구는 주구조, 하위 구조, 부구조를 구성하는 담화 단위사이에 계층구조가 존재함을 주장한다. 본 연구의 목적은 두 가지로 요약된다. 첫째, Kuppevelt가 제안한 주구조를 하위구조나 부구조와 구별하는 식별기준을 나타내는 형식적 정의를 제시한다. 둘째, 지식 표현 언어인 Sowa의 개념구조론의 체계 내에서 담화의 계층구조와 그 구조를 나타내는 언어적 표시인 담화표시의 예를 기술하는 방법을 제시한다. 개념관계로 일탈, 화제 전환, 틀의 관계를 설정하여 담화 내 계층구조와 담화부분과의 화용적인 관계를 규명하였다. 기존의 개념구조론은 선택적 제약, 조응 등의 의미론적인 개념들을 간결하고 정확하게 기술할 수 있었는데 화용론적인 측면의 기술도 가능함을 보여준다.

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History of Offshore Engineering Development

  • 최한석
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
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    • pp.249-252
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    • 2006
  • This paper introduces a review and literature study of offshore engineering and constructions from 1920s to 2000s. The study was focused on the literature survey and the history of Brown & Root and J. Ray McDermott in the Gulf of Mexico and other offshore areas Understanding the offshore history and background of offshore development is an essential ingredient for the initial conceptual design. This study was motivated to enhance the capacity of conceptual design and Front End Engineering Design (FEED) of offshore structures in Korea.

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The Integration of Adaptive Elements into High-Rise Structures

  • Weidner, Stefanie;Steffen, Simon;Sobek, Werner
    • 국제초고층학회논문집
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    • 제8권2호
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    • pp.95-100
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    • 2019
  • Whilst most research focuses on the reduction of operative energy use in buildings, the aspect of which (and how many) materials are used is often neglected and poorly explored. However, considering the continuous growth of the global population and the limited availability of resources, it is clear that focusing on operative energy alone is too short-sighted. The tasks lying ahead for architects and engineers cannot be accomplished with conventional methods of construction. With a share of 50-60% of global resource consumption, the building industry has a decisive impact on our environment. If business as usual continues, resources will be significantly depleted in a matter of decades. Therefore, researchers of the University of Stuttgart are investigating the concept of adaptivity as a promising method for saving resources in the built environment. The term adaptivity in the context of building structures was first introduced by Werner Sobek. It describes a method where sensors, actuators and control units are implemented in systems or facades in order to oppose physical impacts in an ideal way. The applicability of this method will be verified on an experimental high-rise building at the University campus in Stuttgart. Thus, this paper describes this innovative research project and depicts the concept of adaptivity in high-rise structures. Furthermore, it gives an overview of potential actuation concepts and the interdisciplinary challenges behind them.

Development and Evaluation of Standard Electronic Documents Based on Conceptual-level Information Models

  • Kim, Hyoung-Do
    • 한국전자거래학회:학술대회논문집
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    • 한국전자거래학회 2004년도 e-Biz World Conference
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    • pp.332-335
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    • 2004
  • Issues ·Bottom-up v.s. Top-down Development & Evaluation ·Syntax-Directed v.s. Conceptual Modeling -Reusing and Easy understanding -User friendliness and Concrete Rules ·No Aligned Rules and Guidelines for Developing Document Structures from Conceptual Information Models(omitted)

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영어 명사적 관계절의 개념도식에 의한 의미 기술 (A description of English nominal relatives by conceptual graphs)

  • 조길호
    • 영어어문교육
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    • 제9권1호
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    • pp.173-187
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    • 2003
  • This paper proposes a semantic description of the English nominal relatives with a knowledge representation framework of Conceptual Graphs(CGs), which is a computer-oriented form of interlanguage from the Conceptual Structures Theory. This paper focuses on the difference between definite and universally quantified meaning of nominal relatives, on the compound relative clauses, and also on the difference between nominal relative clauses and interrogative clauses.

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Conceptual Retrieval of Chinese Frequently Asked Healthcare Questions

  • Liu, Rey-Long;Lin, Shu-Ling
    • International Journal of Knowledge Content Development & Technology
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    • 제5권1호
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    • pp.49-68
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    • 2015
  • Given a query (a health question), retrieval of relevant frequently asked questions (FAQs) is essential as the FAQs provide both reliable and readable information to healthcare consumers. The retrieval requires the estimation of the semantic similarity between the query and each FAQ. The similarity estimation is challenging as semantic structures of Chinese healthcare FAQs are quite different from those of the FAQs in other domains. In this paper, we propose a conceptual model for Chinese healthcare FAQs, and based on the conceptual model, present a technique ECA that estimates conceptual similarities between FAQs. Empirical evaluation shows that ECA can help various kinds of retrievers to rank relevant FAQs significantly higher. We also make ECA online to provide services for FAQ retrievers.

구문구조 Matrix에 의한 한국어의 수식구조와 개념구조의 해석 (An Analysis of the Korean Modificatory and Conceptual Structure by a Syntactic Matrix)

  • 한광록;최장선;이주근
    • 대한전자공학회논문지
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    • 제25권12호
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    • pp.1639-1648
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    • 1988
  • This paper deals with an analyzing method of the Korean syntax to implement a natural language understanding system. A matrix of the syntactic structure is derived by the structural features of the Korean language. The modificatoty and conceptual structures are extracted from the matrix and the predicate logic form is expressed by extracting the phrase, clause and conceptual structure in the analyzing process. This logic form constructs an knowledge base of the sentence and proposes the possibility of the inference.

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초고층건물의 통합설계시스템에서 개념구조설계법 개발 (Conceptual Structural Design Method in Integrated Design System for Tall Buildings)

  • 송화철;조용수
    • 한국공간구조학회논문집
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    • 제5권3호
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    • pp.75-82
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    • 2005
  • 초고층건물 구조설계를 효율적으로 수행하고 설계정보를 합리적으로 처리하기 위해서 통합설계에 대한 필요성이 증가하고 있으며, 또한 기존의 설계사례를 D/B화하여 초기 설계단계에 적용하는 연구가 필요하다. 구조설계 초기 단계에서는 주재료와 구조형태를 선정하고 대략적인 부재치수를 선정하게 되는데, 이것은 건물높이, 사용하중, 기본풍속, 설계가속도, 최대수평변위, 기둥간격, 층고 등과 같은 정보와 유사 사례에 대한 정보를 토대로 결정하게 된다. 그리고 초기 개념설계 단계에서 주어진 문제를 해결하는 방법은 과거 유사한 문제의 해결지식이 유용하게 적용된다. 본 논문에서는 초고층건물의 통합설계시스템에서의 개념구조설계법을 소개하고, 초기 설계단계에서의 적합성을 초고층건물 적용 예제를 이용하여 검토하고자 한다.

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