• 한국BIM학회 논문집
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• 제7권1호
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• pp.18-27
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• 2017

Although Industry Foundation Classes (IFC) provide standards for exchanging Building Information Modeling (BIM) data, authoring tools still require manual mapping between BIM entities and IFC classes. This leads to errors and omissions, which results in corrupted data exchanges that are unreliable and thus compromise the validity of IFC. This research explored precedent work by Krijnen and Tamke, who suggested ways to automate the mapping of IFC classes using a machine learning technique, namely anomaly detection. The technique incorporates geometric features of individual components to find outliers among entities in identical IFC classes. This research primarily focused on applying this approach on two architectural BIM models and determining its feasibility as well as limitations. Results indicated that the approach, while effective, misclassified outliers when an IFC class had several dissimilar entities. Another issue was the lack of entities for some specific IFC classes that prohibited the anomaly detection from comparing differences. Future research to improve these issues include the addition of geometric features, using novelty detection and the inclusion of a probabilistic graph model, to improve classification accuracy.

• Journal of Construction Engineering and Project Management
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• 제3권1호
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• pp.1-9
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• 2013

Construction is a competitive industry and successful contractors must be able to win bids to obtain projects. Cash flow analysis not only determines actual profit at the end of the project, but also estimates required cash resources or cash ballances at the end of every month. Cash flow analysis is important in managing a construction project; however, it requires extensive information that is not immediately available to the general contractor. Before contractors can perform cash flow analysis, they must first complete a series of pre-requisites such as the quantity take off, scheduling, and cost estimating, followed by accurate assessments of project costs incurred and billable progress made. Consequently, cash flow analysis is currently a lengthy, uncertain process. This paper suggests improved cash flow analysis can be developed using data extraction in Building Information Modeling (BIM). BIM models contain a wealth of information and tools have been developed to automate a series of process such as quantity takeoff, scheduling, and estimating. This paper describes a prototype tool to support BIM-based, automated cash flow analysis.

• 한국게임학회 논문지
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• 제13권2호
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• pp.111-118
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• 2013

미군은 이기종간 워게임 환경통합과 최단시간 모의환경 생성을 위해 SE-CORE와 공통가상 환경을 개발하고 발전시키고 있다. 한국도 실정에 맞는 SEDRIS 연구 등을 진행하고 있지만 여전히 풀어야 할 문제가 많다. 이 연구는 합성자연환경에서 수작업으로 행해지는 객체 배치 과정을 이미지 채널 정보를 통해 반자동화 하는 방법을 제안하고 있으며, 이는 합성환경 생성을 빠르게 하고 이기종간 자료공유를 수월하게 할 수 있게 한다. 향후 추가적인 연구가 진행되면 다양한 정보수집 장치로부터 입력된 자료들을 합성전장환경에 적용할 수 있는 자동화 기술 개발도 가능할 것으로 보인다.

• 한국CDE학회논문집
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• 제11권1호
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• pp.57-66
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• 2006

Modeling product configurations needs large amounts of knowledge about technical and marketing restrictions on the product. Previous attempts to automate product configurations concentrate on representations and management of the knowledge for specific domains in fixed and isolated computing environments. Since the knowledge about product configurations is subject to continuous change and hard to express, these attempts often failed to efficiently manage and exchange the knowledge in collaborative product development. In this paper, XML Topic Map (XTM) is introduced to represent and exchange the knowledge about product configurations in collaborative product development. A product configuration model based on XTM along with its merger and inference facilities enables configuration engineers In collaborative product development to manage and exchange their knowledge efficiently. An implementation of the proposed product configuration model is presented to demonstrate that the proposed approach enables enterprises to exchange the knowledge about product configurations during their collaborative product development.

• Journal of Advanced Marine Engineering and Technology
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• 제34권1호
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• pp.154-162
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• 2010

시뮬레이션 기법은 성능분석을 위하여 다양한 공학 분야에서 활용되는 유용한 방법 중의 하나이다. 항만 시스템의 자동화를 위하여 다양한 장비의 구성 및 운영 등의 효과를 분석할 수 있는 시뮬레이션이 요구된다. 본 논문에서는 항만 자동화를 위한 평가, 분석, 계획 등에 적용 가능한 시뮬레이션 방법론을 제안한다. 이를 위하여 모델링 및 시뮬레이션 환경으로서 이산사건시스템 형식론을 기반으로 한 SES/MB 프레임워크를 적용하여 항만 시스템의 구성원에 대한 모델링 및 시뮬레이션을 수행한다. 제안된 방법론은 항만 시스템의 구성 및 운영 전략 등에 대한 시뮬레이션에 효과적으로 적용될 수 있는 장점을 갖는다. 사례연구를 통하여 제안한 방법론의 타당성을 검토한다.

• 한국기계가공학회지
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• 제14권3호
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• pp.74-84
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• 2015

The core activities of a bicycle manufacturer are design, engineering analysis, and manufacturing. Therefore, it is important to develop a configuration design system for bicycles in order to automate the design process and facilitate the use of design data in engineering analysis and manufacturing. In this paper, we present a method to develop a bicycle configuration design system based on the part-shape information model. The proposed method enables the construction of a CAD library using modeling functions with equations and parameters that are common to most 3D mechanical CAD systems. Furthermore, the part-shape information model ensures the independence between the configuration design system and the library, making it possible to extend the CAD library flexibly without changing the system architecture.

• 한국BIM학회 논문집
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• 제13권4호
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• pp.85-95
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• 2023

In the process of creating drawings based on Building Information Modeling (BIM), automatically generated annotations can cause interference issues depending on the drawing type. This study aims to develop an algorithm for repositioning annotations using genetic algorithms to minimize such interferences. To achieve this, the Application Programming Interface (API) of BIM software was used to analyze data extractable from BIM drawing files. The process involved defining drawing data related to annotation repositioning, preprocessing this data, and deriving optimal placement coordinates for the annotations. Furthermore, applying the developed algorithm to the preliminary design drawings of small and medium-sized neighborhood facilities resulted in approximately a 95.37% decrease in annotation interference, indicating that the proposed algorithm can significantly enhance productivity in BIM-based drawing tasks.

• 한국건축시공학회지
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• 제24권4호
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• pp.507-515
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• 2024

최근 건설산업의 경쟁력을 강화하고 스마트화를 추진하기 위한 수단으로서 BIM의 도입이 확대되고 있다. 그러나 품질 및 원가측면에서 중요한 위치를 차지하고 있는 철근공사는 주로 2D 도면 위주로 철근상세도를 작성하는 등 비효율적인 방식으로 공사관리가 이루어지고 있고 BIM의 활용도도 낮은 편이다. 이에 본 논문은 철근공사의 BIM 도입을 촉진하고 공사관리를 효율화하기 위하여 철근 상세 모델을 자동화하는 시스템을 구현하였다. 현실적인 요인을 감안하여 구조설계도면이 완성된 이후의 단계에서 확정된 구조도면의 정보를 바탕으로 기둥과 보 부재의 철근 상세 모델을 자동으로 생성한다. 실무에서의 활용도를 높이기 위하여 Revit API 개발 도구을 기반으로 C# 프로그래밍 언어를 사용하여 국내 구조설계기준에 적합한 철근 상세를 자동으로 생성할 수 있도록 구성하였다. 본 시스템을 활용하면 수작업 오류를 방지할 수 있고 작업시간 또한 상대적으로 단축할 수 있으며, 생성된 철근 모델 정보를 활용하여 철근공사의 효율성을 높일 수 있을 것으로 판단된다.

• Journal of Advanced Marine Engineering and Technology
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• 제25권1호
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• pp.124-130
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• 2001

This paper presents a methodology on automation of a trailer type vehicle which consists of two parts: a tractor and a trailer. Backward moving and parking control is very important to automate this type of vehicle. It is difficult to control the motion such a trailer vehicle whose dynamics in non-holonomic. Therefore, in this paper, the modeling and parameter estimation of the system using a RCGA(real-coded genetic algorithm) is proposed and a backward path tracking control algorithm is then obtained. The simulation results verify the effectiveness of the proposed method.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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• pp.710-713
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• 2004

There have been numerous research and development efforts to automate business processes or execute business processes automatically. Especially, Web service is considered to be one of the most promising technologies. Existing Web service composition languages such as BPEL (Business Process Execution Language) and BPML (Business Process Modeling Language) do not provide full semantic support for business processes. This paper proposes a 3-layer model that consists of business process layer and service layer which can seamlessly integrates business process semantics with service semantics. The proposed model and architecture will enable effective management of business processes as well-defined corporate assets, services that execute tasks to achieve goals of business processes, and software components that comprise services.