http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
AE 기술을 이용한 미세 홈 가공의 모니터링에 관한 연구
김남훈,이은상,이득우,김남경,곽철훈,Kim, Nam-Hun,Lee, Eun-Sang,Lee, Deug-Woo,Kim, Nam-Kyung,Kwak, Choi-Hun 한국기계가공학회 2003 한국기계가공학회지 Vol.2 No.3
This paper describes evaluation and monitoring methods of machining characteristics for developed micro grooving machine. Experiments were conducted under various process conditions such as spindle revolution speed, feed rates and depth of groove V and U shape of blade and STD11 were used in this experiment. The status of grooving was evaluated through analysis of the Acoustic emission (AE) signal resulted in each process condition. Based on the analysis, this paper examined the possibility of monitoring adapting fuzzy logic. In conclusion, this paper presented the possibility of monitoring in process adapting AE technology and appropriate micro grooving condition.
김남훈,양정열,문재원,김규보,천지선,Kim, Nam-Hun,Yang, Jeong-Yeol,Moon, Jae-Won,Kim, Gyu-Bo,Cheon, Ji-Seon 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.4
Purpose: Blepharoptosis can result from either congenital or acquired causes. Blow out fracture or facial bone fracture including blow out fracture can be one of the causes. Authors experienced 3 cases of severe blepharoptosis after blow out fracture treated only with observation after reduction of associated fracture. Methods: Reconstruction of orbital wall was conducted on all cases diagnosed as blow out fracture using 3 dimensional computed tomography, and conservative treatment was done on accompanying severe blepharoptosis. Results: At the time of injury, all cases showed severe blepharoptosis requiring frontalis muscle transfer for correction. But blepharoptosis was recovered in an average of 18 weeks without any surgical procedure except reconstruction of orbital wall. Conclusion: Once Blepharoptosis occurred after blow out fracture, thorough evaluation must be done at first. If definitive cause of blepahroptisis cannot be found as authors' cases, injury of oculomotor nerve may result in blepharoptosis. So, as for blepharoptosis after blow out fracture, conservative treatment following reconstruction of fractured orbital wall can be one of good management.
단어의 의미와 순서를 고려하는 문서색인방법을 이용한 CNN 기반 한글문서분류
김남훈 ( Nam-hun Kim ),양형정 ( Hyung-jeong Yang ) 한국컴퓨터교육학회 2017 한국컴퓨터교육학회 학술발표대회논문집 Vol.21 No.2
본 논문에서는 컨볼루션 신경망 네트워크(CNN:Convolution Neural Network)을 기반으로 단어의 의 미와 순서를 고려하는 문서 색인 방법을 이용하여 한글 문서 분류 방법을 제안한다. 먼저 문서를 형태 소 분석하여 어절 단위로 분리 한 후, 불용어를 처리 하고, 문서의 단어 의미를 고려하는 문서 표현하고, 문서의 단어 순서까지 고려하여 CNN의 입력으로 사용하였다. 실험결과 CNN 분류기를 기반으로 본 논문에서 제안하는 문서 색인 방법은 TF-IDF를 이용하는 방법보다 4.2%, Word2vec만 단독으로 사 용하는 것보다 1.4%의 성능 상승을 이루었다. 이러한 결과를 통해 본 논문에서 제안하는 방법이 문서 범주화 데이터 셋에서 문서 분류 성능향상에 영향을 미친다는 것을 확인하였다.
김남훈(Nam-Hun Kim),김민호(Min-Ho Kim),김민희(Min-Huei Kim),김동희(Dong-Hee Kim),황돈하(Don-Ha Hwang) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
Direct torque control(DTC) is known to produce quick response in ac drives. Some drawbacks of the classical DTC are the relatively large torque ripple in a low speed range and notable current pulsation during steady state. They are reflected speed response and increased acoustical noise. In this paper, The DTC quick response are preserved at transient state, while better quality steady state performance is produced by Space Vector Modulation(SVM). It is able to reduce the acoustical noise, torque ripple and current pulsation during steady state. The system presented are closed loop stator flux and torque observer for wide speed range that inputs are currents and voltages sensing of motor terminal Simulation results for the 2.2kw general purposed induction motor are presented and discussed.
액세스 홀 형상변수가 WUF-W 접합부 반복거동에 미치는 영향
김남훈(Kim, Nam-Hun),김태오(Kim, Tae-O),한상환(Han, Sang Whan) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.1
The welded unreinforced flange-welded web (WUF-W) connection is one of seven prequalified connections for special moment frames (SMF) specified in AISC 358-10 (2010). Previous studies reported that the cyclic behavior of WUF-W connections was strongly affected by weld access hole geometry, and some WUF-W connections did not satisfy the requirements for SMF connections. For investigating in detail the effect of access hole configurations on the cyclic behavior of WUF-W connections, this study conducts three dimensional nonlinear finite element analyses. This study shows that the seismic behavior of WUF-W connections are strongly affected by two configuration parameters, access hole slope and length of flat portion. To satisfy the requirement for SMF connections, this study proposes a range of the access hole slope and length of flat portion for WUF-W connections considering different span-to-depth ratios, beam depths, and material types.
김남훈(Kim, Nam-Hun),김태오(Kim, Tae-O),한상환(Han, Sang-Whan) 대한건축학회 2016 대한건축학회 학술발표대회 논문집 Vol.36 No.2
The welded unreinforced flange-welded web (WUF-W) connection is one of seven prequalified connections for special moment frames (SMF) specified in AISC 358-10 (2010). Previous studies reported that the cyclic behavior of WUF-W connections was strongly affected by weld access hole geometry, and some WUF-W connections did not satisfy the requirements for SMF connections. For investigating in detail the effect of access hole configurations on the cyclic behavior of WUF-W connections, this study conducts three dimensional nonlinear finite element analyses. This study shows that the seismic behavior of WUF-W connections are strongly affected by two configuration parameters, access hole slope and length of flat portion.