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논문 : 기계적 성질 ; Tramp Element를 함유한 고강도 열연강판의 미세조직과 기계적 성질
이창길 ( Chang Gil Lee ),김성준 ( Sung Joon Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 1998 대한금속·재료학회지 Vol.36 No.7
The present study is aimed at developing the high strength steel plates containing tramp elements. Four kinds of Fe-0.2C-l.5Mn-1,5Si-(Cu, Cr, and Ni) hot-rolled steel plates were prepared, and microstructural observation and tensile tests were conducted, The main emphasis has been placed on understanding the effects of tramp elements (Cu, Cr, and Ni) and the coiling temperature (CT) on microstructures and properties of the hot-rolled steel plates. In the case of coiling at 450℃, the higher volume fractions of retained austenite were obtained than the case of coiling at 400℃, and the tensile elongations and the values of strength-elongation balance were increased owing to the transformation induced plasticity (TRIP). The addition of Ni resulted in a great increase of the retained austenite volume fraction and a discontinuous yielding behavior. On the other hand, the addition of Cr or Cr+Ni showed a dual phase stress strain curve having high tensile strength and low elongation.
지도의 의미 정보를 이용한 개선된 차량 위치 추정 알고리즘
이창길(Chang Gil Lee),최윤호(Yoon Ho Choi),박진배(Jin Bae Park) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.9
In this paper, we propose a novel method for estimating a vehicle’s current position, even on roads that have similar patterns. In the proposed method, we classified the semantic information of the nodes in detail and added the semantic information of the link to solve the problem due to similar and repeated patterns. We also improved the mapping method by comparing the result of the duplicated matching with that of the only matching obtained just before corresponding duplicated matching. From the simulation results, we verify that the performance of the proposed method is better than that of the existing method.