http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
탄소섬유와 석면을 보강한 시멘트 복합재료의 압축, 인장 및 휨 강도에 관한연구
이환홍,박종서,김광섭,노재성 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.1
This study was carried out to examine the reducing ability of asbestos quantity added in asbestos reinforced cement composite(ARC). The using amount of asbestos is subject to restriction from 10-20 vol% to 5-10 vol%,because it is very harmful cancerogenic substance. Asbestos was replaced by pitch based isotropic carbon fiber, and then the mechanical properties, compressive, tensile and flexural strengths were tested as a function of mixing proportions. The results are as follows 1) The compressive strength of carbon fiber and asbestos reinforced cement composite(CFARC) was greater than ARC by superplasticizer, reducingW/C ratio to 20 percent. 2) The tensile strength of CFARC was showed increasing trend up to 52% compared to ARC at 5% carbon fiber volume fraction. 3) The flexural strength of CFARC was showed increasing trend up to 17% cowpared to ARC at 5% carbon fiber volume fraction.
오픈소스 플랫폼을 이용한 자율주행 실차 구현 및 테스트베드 검증
이환홍(Hwan-Hong Lee),김학주(Hak-Joo Kim),기석철(Seok-Cheol Kee) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
This paper presents the methodologies involved in implementing real-world vehicle-based autonomous driving using Autoware Universe, an open-source autonomous driving software platform, along with C-Track, an autonomous driving testbed embedded in a real road environment. As autonomous driving technology advances, it becomes increasingly important to effectively validate and test autonomous driving systems in real-world road environments. In addition, various research and developments are being conducted to incorporate various open sources, including Autoware, into autonomous driving systems. The main purpose of this study was to test Autoware Universe, an open-source autonomous driving software platform, C-track, an autonomous driving test bed that mimics real road environments, and actual vehicles, and evaluate the results of autonomous driving experiments. For reasonable autonomous driving, various packages within the Autoware Universe wre applied and longitudinal and lateral control parameter values were adjusted. Using the open source of Autoware Universe, including the control gain value determined through the experiment conducted in this paper, it can be used as an important guideline for developing and applying autonomous driving sytems.
Aluminum Isoproxide의 합성과 그 Sol의 특성
홍성수,이환홍,노재성,조헌영 忠南大學校 産業技術硏究所 1991 산업기술연구논문집 Vol.6 No.2
Aluminum isoproxide was synthesized by aluminum and isoproplyl alcohol and hydrolyzed to make alumina sol. The collodial stability of alumina sol was evaluated by measuring zeta potential. A high purity aluminum isoproxide(>99%) was obtained from aluminum powder, foil and flake. The particle size of aluminum powder was smaller than 250㎛ to obtain 80% yield and up within 6 hours reaction time. The alumina sol was highly stabilized in the presence of acid medium at a hydrolysis condition of pH 3 and water/alkoxide=150 at 65℃. The particle size of alumina powder was mostly under l㎛ after sintering at 1200℃ for 1 hours.