• Title/Summary/Keyword: 포인트부

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A Study of Running Safety According to the Section Shape of an F10/F12 Turnout (F10/F12 분기기에서의 단면 형상별 주행안전성 연구)

  • Kim, Sung-Jong;Eom, Beom-Gyu;Kang, Bu-Byoung;Lee, Hi-Sung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.6
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    • pp.591-598
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    • 2011

  • When a vehicle passes through a turnout, it is necessary for the changes in lateral force to be minimized to ensure the safe running of the vehicle. Therefore, the analysis of the interaction between the vehicle and the turnout is crucial for estimating the lateral force and the derailment coefficient on the turnout. In this paper, the effect of the variation of section shape on the running safety of a vehicle was investigated by changing the shape of the point part and the crossing part. The tongue rail length of the point part and nose rail height of the crossing part of an F10/F12 turnout were changed, and the running safety of the vehicle was analyzed.

  • https://doi.org/10.3795/KSME-A.2011.35.6.591 인용 PDF KSCI

A Study on Design of a Low Complexity TCM Decoder Combined with Space-Time Block Codes (시공간 블록부호(STBC)가 결합된 TCM 디코더 설계에 관한 연구)

  • 박철현;정윤호;이서구;김근회;김재석
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.3A
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    • pp.324-330
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    • 2004

  • In this paper, we propose the TCM(Trellis coded modulation) decoding scheme that reduces the number of operations in branch metric with STBC(space time block codes) channel information and present the implementation results. The proposed TCM decoding scheme needs only 1 signal point in each TCM subset. Using bias point scheme, It detects the minimum distance symbol. The proposed TCM decoding scheme can reduce the branch metric calculations. In case of 16QAM 8 subset, the reduction ratio is about 50％ and for 64QAM 8 subset, about 80％ reduction can be obtained. The results of logic synthesis for the TCM and STBC decoder with the proposed scheme are 57.6K gate count.

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A Study on Cross-section Extraction Method based on 3D Point Cloud Data (3차원 포인트클라우드 기반 단면 정보 추출 기술 개발)

  • Kim, Hoe-Min;Chun, Sungkuk;Kim, Un-Yong;Yun, Jeongrok
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.11a
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    • pp.277-278
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    • 2022

  • 본 연구는 3차원 포인트클라우드로부터 단면 정보를 자동으로 추출할 수 있는 알고리즘에 관한 것이다. 3차원 스캐너로부터 획득한 포인트클라우드 데이터는 다양한 제조 공정의 결과물인 산업 제품의 접합 상태를 파악하는데 자주 사용된다. 하지만 많은 노이즈를 포함하는 포인트클라우드 데이터로부터 제조 상태에 대한 수치적인 결과를 반복적으로 획득하기에는 많은 비용이 수반된다. 따라서 본 연구는 산업 제품의 접합부에 대한 포인트클라우드로부터 단면 정보를 자동으로 추출할 수 있는 알고리즘을 소개하고자 한다.

  • https://doi.org/10.3745/PKIPS.y2022m11a.277 인용 PDF