• Title/Summary/Keyword: Cheong-Dae

검색결과 335건 처리시간 0.063초

Feature Extraction Method for the Character Recognition of the Low Resolution Document

  • Kim, Dae-Hak;Cheong, Hyoung-Chul
    • Journal of the Korean Data and Information Science Society
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    • 제14권3호
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    • pp.525-533
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    • 2003

  • In this paper we introduce some existing preprocessing algorithm for character recognition and consider feature extraction method for the recognition of low resolution document. Image recognition of low resolution document including fax images can be frequently misclassified due to the blurring effect, slope effect, noise and so on. In order to overcome these difficulties in the character recognition we considered a mesh feature extraction and contour direction code feature. System for automatic character recognition were suggested.

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모바일 와이맥스 시스템에서 인접 셀 간섭 완화를 위한 채널 추정 (Channel Estimation for OCI Mitigation in Mobile WiMAX Systems)

  • 김정환;반대승;이용환
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2008년도 하계종합학술대회
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    • pp.291-292
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    • 2008

  • In orthogonal frequency division multiplexing based wireless system, a pilot signal is often employed to estimate channel state information (CSI). However, the received pilot signal is interfered by other cell interference in multi-cell environments. We consider the estimation of CSI by utilizing orthogonal preambles and channel correlation.

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제주마의 섬유성골리영양증(Osteodystrophia Fibrosa)의 일예 (Osteodystrophia Fibrosa in a Korean Native Pony)

  • 박응복;정창국;한정희;장영대
    • 한국임상수의학회지
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    • 제2권1호
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    • pp.155-159
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    • 1985

  • The lesions of maxillary swelling observed during necropsy of a korean native pony aged 5 years old were consistent with osteodystrophia fibrosa microscopically. The maxillary lesion was characterized by completely altered bone structure showing complex processes of marked bone resorption with extensive fibrous replacement and accelerated osteoid formation.

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Helicobacter pylori 감염와 위암과의 관련성에 대한 식이요인의 교호작용: 코호트내 환자-대조군 연구 (Effect modification of association between Helicobacter pylori infection and gastric cancer by dietary factor : Result from a nested case-control study within cohort)

  • 곽진;신애선;신해림;강대희;박수경;김청식;유근영
    • 대한예방의학회:학술대회논문집
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    • 대한예방의학회 2004년도 제56차 추계 학술대회 연제집
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    • pp.81.2-81.2
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    • 2004

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플라즈마 방전에서 패닝 효과에 관한 연구 (A Study on Penning Effect in Plasma Discharge)

  • Lee, Jong-chan;Lee, Cheong-hak;Park, Dae-hee
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1997년도 추계학술대회 논문집
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    • pp.515-517
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    • 1997

  • In this paper, the penning effect was studded to control accelerating of the ionization that means Increasing of cross-sectional collision through penning reactions in the plasma cells of Hg-Ar-Ne (x: 10-x, 60Torr) gas discharge under various concentrations of Ar.

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