http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이원균(Lee Won Kyun),이홍섭(Lee Hong Seob),황희용(Hwang Hee Yong) 강원대학교 산업기술연구소 2007 産業技術硏究 Vol.27 No.1
In this paper, the exact analysis of the parallel coupled line with open stub is presented. This structure shows LPF characteristics with broad stopband and sharp skirt characteristics. We derived the exact Z-matrix expression of the structure. In order to show the validation of the expression we designed 3th order Chebyshev LPF using the structure. The simulated data excellently agreed with the predicted values by the calculation using the derived expression.
개방 스터브를 갖는 평행 결합 선로의 해석과 브랜치 라인 하이브리드에의 응용
이원균(Won-Kyun Lee),황희용(Hee-Yong Hwang) 한국전자파학회 2008 한국전자파학회논문지 Vol.19 No.1
본 논문에서는 개방 스터브를 갖는 평행 결합 선로의 해석과 이를 이용하여 고조파 저지 특성을 갖는 소형화된 새로운 브랜치 라인 하이브리드를 제안한다. 먼저, 개방 스터브를 포함한 평행 결합 선로 전체의 Z-파라미터를 유도하였으며, 이는 넓은 저지 대역을 갖는 단위 저역 통과 여파기(LUC)의 특성을 갖는다. 이를 브랜치 라인 하이브리드의 설계에 적용하여, 중심 주파수 1.8 ㎓ 근처에서는 기존 브랜치 라인 하이브리드와 동일한 특성을 가지지만 크기는 약 1/2로 줄이고, 5체배 고조파를 포함한 12 ㎓까지 스퓨리어스 성분을 -20 ㏈ 이하로 저지하는 새로운 브랜치 라인 하이브리드를 설계하였다. In this paper, the exact analysis of the parallel coupled line with open stub and an application to branch-line hybrid are presented. The Z-parameter of the parallel coupled line with an open stub is derived. The structure shows the characteristics as a lowpass filter unit cell(LUC) with wide stop band. Using the characteristics we designed a miniaturized branch-line hybrid with wide harmonic-suppressed band. The size of the new branch-line hybrid is a half of the conventional branch-line hybrid. The frequency response is the same with that of the conventional one near 1.7 ㎓ center frequency. Including the fifth harmonics, up to 12 ㎓ spurious responses are suppressed below to -20 ㏈.
허세곤(Se-Gon Heo),이원균(Won-Kyun Lee),민병권(Byung-Kwon Min),제태진(Tae-Jin Je) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2
Recently, micromilling process has been progressed to meet the variety of the industry demands in micromolds and precision components. As a result, more and more commercialized micro tools and machines become available during last few years. This paper reviews the recent progress of micromilling technology in last five years. The results in process, machine tools, and micro tool fabrications are discussed.
크론병 환자의 진단에서 식습관 및 성격 특성에 따른 소장조영술 적용에 관한 연구 : Peroral Pneumocolon(PNC) Technique 중심으로
고주영(Ju Young Ko),김상균(Sang Kyun Kim),임성훈(Sung Hun Im),이원균(Won Kyun Lee),김금남(Geum Nam Kim),이우식(Woo Sik Lee),조영기(Young Gi Cho) 대한영상의학기술학회 2007 대한영상의학기술학회 논문지 Vol.2007 No.-
Purpose : In this study, comparison was performed, prior to the small bowel series(SBS), on dietary habit and personality characteristics of younger patients who visited the hospital because of iron deficiency anemia(IDA) or irritable bowel syndrome(IBS) and were diagnosed as with Crohn’s disease, and thereby more positive and closer small bowel series study were conducted on the are as such as ileocecal region, ascending colon, small bowel easier to develop Crohn’s disease, in order to eliminate related problems including a lengthy diagnosis period of Chohn’s disease and misdiagnosis. Materials and Methods : In relation with ‘effect of dietary habit and personality on bowel diseases,’ a questionnaire survey was conducted on 13 patients(male : female =10 : 3, average age=24) diagnosed with Crohn’s disease, among those who underwent small and large bowels examinations in our hospital from January 2004 to June 2003. The questionnaire consisted of 88 items in total among which there were 15, 50, 19, and 4 questions about personal information, dietary habit, personality, obsessive mentality, and behavioral pattern, respectively. Results : As a result, most patients with Crohn’s disease were found to have introverted personality(69%), have 2 meals a day(62%), and prefer meats(23%) and instant food(31%). In the assessment of behavioral pattern, the majority of the patients were likely to obsess about trivial things(77%), indecisive(77%), talk less(69%), and be cautious in handling matters(85%). As for the situations prior to the development of Crohn’s disease, the most common responses were ‘highly busy’ ‘stress-stricken,’ and ‘have trouble sleeping due to anxiety. ‘In addition, as for the causes for worsening of Crohn’s disease, students pointed out the failure to adapt to school life and exams, while workers cited work-related stress. Conclusion : With the inquiries(26 questions) and clinical findings obtained in this study, this study is expected to contribute to shortening of the period for Crohn’s disease diagnosis and minimization of misdiagnosis by means of more positive use of small bowel series(Peroral pneumocolon technique) to a larger degree.