http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김황국(Hwang-Kuk Kim),최재성(Jae-Sung Choi),장운용(Un-Yong Jang),박대원(Dae-Won Park),길경석(Gyung-Suk Kil) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
This paper describes the design and fabrication of a soil resistivity measurement system using 9 auxiliary electrodes ; 6 potential-, a reference-, a current-, and a ground- electrode. The measurement system is composed of a current source (300 [Vrms], 5 [A], Sine-wave, 45 ~ 500 [Hz]), a data acquisition (400 [kS/s], 16 bit, 16 Ch.), and an operating program based on a graphical software of National Instrument Co. The proposed system is convenient for choosing the position of electrodes because the soil resistivity is calculated having no concern with the length and the spacing between electrodes.
3D-HDTV 지상파 전송을 위한 분산송신 기반 단일 주파수 방송망 내 송신신호 전력분포 분석
김재길(Kim, Jae-kil),신동철(Shin, Dong-chul),이성윤(Lee, Sungyoon),이제원(Lee, Jewon),안재민(Ahn, Jae-Min) 한국방송·미디어공학회 2011 한국방송공학회 학술발표대회 논문집 Vol.2011 No.7
본 논문은 3D-HDTV 지상파 방송을 위한 분산송신 기반 단일 주파수 방송망 내 송신안테나 위치에 따른 송신신호 전력분포를 분석하였다. 분산송신 기반 단일 주파수 방송망 구조는 하나의 주 송신안테나와 3개의 부 송신 안테나로 구성되어 있어 수신기가 방송망 내 어느 위치에 있더라도 최소 2개 이상의 송신신호를 수신할 수 있다. 이러한 방송망 구조는 송신 안테나들이 지역적으로 배치되어 있기 때문에 공간 다이버시티를 획득 할 수 있다. 그러나 거리에 따른 송신신호 전력 감쇠 때문에 방송망 내 수신기 위치에 따라 수신 SNR이 변화하게 된다. 시스템 시뮬레이션을 통해 제안된 단일 주파수 방송망 내 송신전력 분포 분석을 통하여 안정적인 데이터 수신율을 보장하기 위해 적용 가능한 데이터 송신기법에 대해 고찰하였다.
원위 경골 골절의 임상양상 및 최소 침습적 금속판 고정술의 결과
김원유,지종훈,권오수,박상은,김영율,길호진,정재중,Kim, Weon-Yoo,Ji, Jong-Hun,Kwon, Oh-Soo,Park, Sang-Eun,Kim, Young-Yul,Kil, Ho-Jin,Jeong, Jae-Jung 대한족부족관절학회 2012 대한족부족관절학회지 Vol.16 No.2
Purpose: The purpose of this study is to analyze the clinical features of distal tibia fractures and to evaluate the treatment outcomes of minimally invasive plate osteosynthesis (MIPO). Materials and Methods: From January 2004 to December 2009, 84 cases of 81 patients treated with plate fixation for distal tibia fracture were enrolled in this retrospective review. We investigated age, sex, injury mechanism, fracture patterns, and complications, and the clinical features were analyzed. To evaluate the treatment outcomes of MIPO, we divided into two groups. MIPO group consisted of 55 patients were treated with MIPO technique and conventional group consisted of 18 patients were treated with open reduction and internal fixation with conventional anterolateral plating. The results were compared between two groups by assessing bony union time, operation time, amount of blood loss, range of ankle motion, clinical score by American Orthopaedic Foot and Ankle Society (AOFAS) score, and post-operative complications. Results: The mean age of 81 patients with distal tibia fracture was 54.8 years. According to AO classification, A1:2:3 were 16, 20, 16 patients, B1:2:3 were 2, 8, 7, C1:2:3 were 1, 3, 11 patients. According to injury mechanism, slip down injury was patients, traffic accident was 26, fall from height injury was 14 patients respectively. The type A fractures were lower energy trauma and more older patients. The type C fractures were higher energy trauma and younger patients. MIPO group was better than conventional group in operative time, blood loss, bony union time, and ankle joint motion. In complications, MIPO group showed no nonunion and infection, one malunion, one skin necrosis, nine skin irritations, and one screw breakage. Conventional group showed two nonunion, four infections, two skin necrosis, and one metal failure. Conclusion: Distal tibial fractures caused by low energy trauma were on the increase. Minimal invasive plate osteosynthesis was shorter bony union time and operation time, less blood loss, and larger ankle motions than conventional open reduction and plate fixation.