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측면주사소나 특성에 따른 자율무인잠수정 기뢰탐색 효과도 분석
유태석,박석준,윤선일,박호규,Yoo, Tae-Suk,Park, Seok-Joon,Yoon, Seon-Il,Park, Ho-Gyu 한국정보통신학회 2020 한국정보통신학회논문지 Vol.24 No.8
부설된 기뢰를 소해하기 위해 기뢰매설 예상구역에 대한 탐색을 수행한다. 이 때 기뢰탐색은 기뢰의 위험성, 아군의 안정성 등을 고려하여 자율무인잠수정을 이용한다. 매설된 기뢰를 식별하기 위한 소나시스템은 측면주사소나, 합성개구소나 등을 탑재한다. 본 논문은 측면주사소나 특성에 따른 기뢰탐색효과도 분석에 대해 기술한다. 각 측면주사소나의 특성을 바탕으로 음향조사역 및 인식확률을 모델링 하였고, AUV의 주행패턴에 따라 분석을 수행하였다. AUV의 주행패턴은 측면주사소나 음영구역의 유무에 따라 3가지 탐색패턴을 정의하였다. 분석결과는 각 탐색패턴 마다 탐지시간, 탐지확률을 도출하고 최종적으로 측면주사소나 음영구역의 유무에 따른 탐색 향상도를 도출하였다. In order to Mine Countermeasure (MCM), the search is carried out for the expected mine zone. At this time, mine hunting uses Autonomous Unmanned Vehicle(AUV), taking into account the danger of mine and the stability of our forces. Sonar system for identifying buried mines are equipped with Side Scan Sonar(SSS) or Synthetic Aperture Sonar(SAS). This paper describes the analysis of mine hunting effects according to the commercial SSS characteristics. Based on the characteristics of each SSS, the insonified area and recognition probability were modeled, and the analysis was performed according to the search pattern of the AUV. AUV's search pattern defines three patterns depending on the presence or absence of SSS or shaded areas. The analysis results derived search time and detection probability for each search pattern, and finally, the improvement of search depending on the presence or absence of side injection or shaded area.
유태석 ( Tae Seok Yoo ),김태환 ( Tae Hwan Kim ),전재범 ( Jae Bum Jun ),장대국 ( Dae Kook Chang ),이제경 ( Je Kyung Lee ),고희관 ( Hee Kwan Koh ),심승철 ( Seung Cheol Shim ),정성수 ( Sung Soo Jung ),이인홍 ( In Hong Lee ),배상철 ( 대한류마티스학회 1999 대한류마티스학회지 Vol.6 No.2
Objectives: Patients who develop rheumatoid arthritis over 60 years old (elderly-onset rheumatoid arthritis, EORA) are different from those of younger-onset disease(YORA). Several aspects are emphasized; more equal sex distribution, more often systemic complaints, more larger joints involvement, high ESR rates, and less rheumatoid factor positivity. We compared the clinical characteristics of EORA with those of YORA. Methods: Five hundred and fifty-six patients who had met the ACR criteria for rheumatoid arthritis were studied. We compared the difference with clinical manifestation, disease activity markers, serologic markers including rheumatoid factor and antiperinuclear factor, and radiologic changes between EORA and YORA. Results: EORA: YORA ratio is 49:507, no difference between male and female ratio. The age at onset of EORA is 67.3±3.9 years old, YORA is 44.9±10.5 years old, disease duration is not different in both groups. The ESR of EORA(47.65±13.8) is higher than that of YORA(39.49±6.1), the positivity of antiperinuclear factor is significantly increased in the EORA group as compared with YORA group. The comparisons of disease activity including Ritchie index; early RA in both groups showed significant difference only in rheumatoid factor titer. Conclusion: The EORA is similar to YORA except high ESR, high rheumatoid factor titer, and high positivity of antiperinuclear factor. However, we failed to demonstrate that the EORA runs different course with heterogeneous pathogenesis to the YORA.