http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
산업폐기물 소각로에서 SNCR공정에 의한 NOx 제거효율에 관한 연구
류해열,김민철,정종현,이강우,정진도,Ryu Hae-Yeol,Kim Min-Choul,Jung Jong-Hyeon,Lee Gang-Woo,Chung Jin-Do 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.4
The environmental regulations in the world has been reinforced and many nations has devoted themselves to the development of cost-effective technology. Selective catalyst reduction(SCR) and selective non-catalyst reduction (SNCR) processes are mainly used to treat nitrogen oxidants generated from fossil-fuel combustion. One of these typical technologies for reduction of do-NOx is SNCR process has increased continuously because of the low cost for building and maintenance. Nevertheless the researches on the application to real scale plant by the reductant like Urea are rarely studied. In this paper, an experimental investigations were performed on the SNCR process in the industrial waste incineration plant. With no reducing agent, the concentration of NOx stayed in around 180 ppm $(O_2\;12\%)$ with the exhausting temperature of $950^{\circ}C$ and changed within the range of 20 ppm to remain relatively consistent. When $10\;wt\%)$ of a solution was added, the efficiency of denitrification reached above $61.4\%$ with the NSR of 2.0 and the exhausting temperature of $950^{\circ}C.$ When the concentration of the urea solution was set to $10\;wt\%$ and the sprinkling to four nozzles, the reaction temperature was reduced to about $50~100^{\circ}C$ with a mixture of $10\;wt\%\;CH_3OH\;and\;5wt\%\;Na_2CO_3$ in $40\;wt\%$ of the solution. The NOx removal efficiency increased to $78.4\%,$ achieving a broader and expansive range of reaction temperatures than the addition of an unmixed pure solution.
김현철,신동훈,김병엽,김철우,김도형,한승혜,오명돈,이재용,이민영,김상억,김학찬,오인균,이병두,최강원 대한내과학회 2002 대한내과학회지 Vol.62 No.2
Non-Hodgkin's lymphoma (NHL) is the secondary most common tumor in HIV-infected individuals. The AIDS-related lymphomas are a late manifestation of HIV infection and may increase in frequency as patients live longer with highly active antiretroviral therapy and effective prophylaxis of opportunistic infections. Histologically AIDS-related NHL are either high (2/3) or intermediate (1/3) grade lymphoma. We report a case of gastric Non-Hodgkin's lymphoma in AIDS patient. Two years ago, she was diagnosed as HIV-infected individual in public hospital. She presented with epigastric pain and mass-like sensation. Under the impression of gastric cancer, subtotal gastrectomy was done. But, she diagnosed as diffuse large B cell lymphoma by histologic finding, immunohistochemical study. This is the first report of gastric Non-Hodgkin's lymphoma from AIDS patients in Korea(Korean J Med 62:223-229, 2002)
Characterization of ^28Si^+ and ^40Ar^+ ion-implanted epitaxial ReSi₂films on an n-Si(100) substrate
Kim, Kun Ho,Kim, Do Hee,Nam, Sang Tack,Lee, Joung Ju,Kim, In Ho,Kim, Sung Chul,Lee, Jeong Yong,Nicolet, Marc-A.,Bai, Gang 동의대학교 기초과학연구소 1994 基礎科學硏究論文集 Vol.4 No.1
The structural and electrical characteristics of 300 keV Si^+ or 380 keV Ar^+ ion-implanted epitaxial ReSi₂films grown on an n-Si(100) substrate have been studied by using 2 MeV ⁴He^+ ion backscattering spectrometry, x-ray diffraction, high-resolution transmission electron microscopy, and electrical measurement. Ion implantation causes static disorder in the film, which overlap and grow to become an amorphous layer. The threshold dose for amorphizing the ReSi₂film is ~5×10^14/cm²for 28^Si^+ and ~1×10^14/cm²for 40^Ar. Although the resistivity of the implanted ReSi₂film decrease when the degree of disorder (or the implantation dose) is increased, the resistivity reaches a minimum value at a dose of ~1×10^15/cm²for Si^+ or ~5×10^14/cm²for Ar^+. The 28^Si^+-implanted amorphus ReSi₂films recovered original epitaxy after thermal annealing at 700℃ for 30 min in vacuum, as do the partly amorphized ReSi₂films by 40^Ar^+ implantation. On the other hand, those films fully amorphized by 40^Ar^+ implantation (dose$gt;1×10^14/cm²) did not recover after thermal annealing, even when exposed to a temperature as high as 1000℃ for 30 min.
작물인식 인공지능모델 학습을 위한 효과적인 토마토 분할 Annotation 방식 비교
서강훈 ( Gang-hun Seo ),김용현 ( Yong-hyun Kim ),손민하 ( Min-ha Son ),권경도 ( Kyung-do Kwon ),홍영기 ( Youngki Hong ),김경철 ( Kyoung-chul Kim ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2
농업인구 감소 추세와 고령화로 인한 노동력 부족을 해결하기 위해 농업에 인공지능을 활용한 자동화 연구가 주목되고 있다. 특히, 인공지능을 활용한 작물 인식연구가 활발히 진행되고 있다. 한편, 농작물 데이터는 환경의 영향을 많이 받기 때문에 Annotation 방식에 따라 모델의 정확도에 큰 영향을 끼친다. 따라서, 본 연구에서는 효과적인 토마토 영상의 Annotation 방식을 규명하기 위해 두 가지 Annotation 방식으로 라벨링된 데이터 셋을 각각 학습하고 정확도를 비교하였다. 토마토 영상은 국립농업과학원(Wanju, Korea)의 첨단온실에서 취득하였다. 영상 데이터는 RGB-D 카메라(D435, Intel, CA, USA)를 활용하여 취득하였으며, 총 269장의 영상에 1,990개의 과실 정보가 포함된다. Annotation 방식은 다음과 같다. 첫 번째 방식은 영상에 노출 되어있는 토마토만을 Annotation하는 방식으로, 폐색으로 인해 육안으로 볼 수 없는 부분을 제외한 가시적으로 확인할 수 있는 토마토의 부분만 Annotation하는 방식이다. 두 번째 방식은 영상에 노출 되어있는 토마토에 폐색이 있는 경우, 작업자의 주관적인 판단에 따라 폐색 뒤의 토마토 과형을 예측하여 Annotation하는 방식이다. 앞의 두 가지 방식으로 만들어진 데이터 셋은 YOLACT 알고리즘을 통해 각각 학습되었으며, Epoch과 Batch size 및 학습율은 각각 300, 16, 0.001로 설정되었다. 그 결과, 두 가지 학습방식에서 Total Loss의 최종 수렴 값은 각각 1.0616 및 1.0728로 확인되었다. 이처럼 두 방식 모두 Total Loss 값이 높은 이유는 데이터 수가 부족하기 때문으로 사료된다. 따라서 향후에는 더 많은 데이터를 확보하여 인식 모델의 정확도를 향상시키기 위한 연구를 진행할 계획이다.
간세포암의 근치적 절제 후 간내 재발암의 위험 인자 분석
김강미(Gang Mi Kim),최기홍(Gi Hong Choi),한대훈(Dai Hoon Han),김동현(Dong Hyun Kim),강창무(Chang Moo Kang),최진섭(Jin Sub Choi),박준용(Jun Yong Park),김도영(Do Yong Kim),한광협(Kwang-Hyub Han),전재윤(Chae Yoon Chon),박영년(Young Nyun 한국간담췌외과학회 2008 한국간담췌외과학회지 Vol.12 No.4
Purpose: Intrahepatic recurrent HCC has been classified according to location, the time to recurrence and the pattern of presentation. The purpose of this study is to classify intrahepatic recurrent HCCs into subgroups that have relatively similar recurrent patterns and to identify the risk factors for each recurrent type. Methods: A total of 353 patients were retrospectively studied. Intrahepatic recurrent HCC was classified into nodular recurrence (<4 nodules; type I), multinodular-diffuse recurrence (≥4 nodules; type II) and infiltrative recurrence (type III). The cut-off time between early and late recurrence was chosen to be 12 months following hepatectomy. Results: Among the 134 patients with only intrahepatic recurrence, 94 were type I, 27 were type II and 13 were type III. The median survival time following the recurrence of types I, II and III were 55, 16 and 8 months, respectively. As determined by multivariate analysis, perioperative transfusion and indocyanine green retention at 15 minutes (ICG R 15 >10%) were the independent risk factors for type I; an ICG R 15>10%, microvessel invasion and intrahepatic metastasis were the independent risk factors for type II; an ICG R 15>10% and microscopic portal vein invasion were the independent risk factors for type III. Multivariate analysis revealed that the prognosis of patients with IHR was associated with the recurrent types, the time to recurrence and the serum albumin level at the initial presentation. Following multivariate analysis, an ICG R 15>10% and intrahepatic metastasis were the independent risk factors for early type I recurrence; perioperative transfusion and a higher grade of hepatitis activity were the independent risk factors for late type I recurrence. Conclusions: The recurrent types and the time to recurrence may help us to predict the cellular origin of intrahepatic recurrent HCC and the prognosis of the patients who suffer with intrahepatic recurrent HCC.
KoFlux: A New Tool to Study the Biosphere-Atmosphere Interactions in Asia
Joon Kim,Wonsik Kim,Byong-lyol Lee,Ki-hyun Kim,Kyu-rang Kim,Min-young Kim,Bang-yong Lee,Do-won Lee,Gang-woong Lee,Jeong-taek Lee,Jong-hwan Lim,Jai-ho Oh,Eun-woo Park,Jae-seol Shim,Jin-il Yun,Chae-shik 한국기상학회 2002 대기 Vol.12 No.1
태양전지 interconnect ribbon용 Sn-Bi계 무연솔더 연구
강인구(Gang, In-Gu),김혁종(Kim, Hyeok-Jong),김도형(Kim, Do-Hyeong),김진식(Kim, Jin-Sik),김효재(Kim, Hyo-Jae),원수현(Won, Su-Hyeon),조성훈(Jo, Seong-Hun),이상권(Lee, Sang-Gwon),하정원(Ha, Jeong-Won),최병호(Choe, Byeong-Ho) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
Sn-Ag계 합금은 대표적인 무연 솔더 조성으로 전자제품의 실장 및 접합에 적용되어 왔으며, 태양전지 분야에서도 모듈의 전극과 bus바로 사용되는 등 다양한 분야에서 사용되고 있다. 그러나 최근 Ag 가격의 급격한 상승과 솔더 접합부의 신뢰성을 보다 향상시키고자 Ag의 함량을 줄이고 다원계 합금 조성의 무연 솔더 연구가 활발히 진행되고 있다. 본 실험에서는 기존의 연구 결과를 바탕으로 Sn-1.0Ag-0.5Cu-0.4In 4원계 무연솔더 조성에 Bi를 첨가하여 최적의 융점과 용융구간을 가지는 5원계 Sn-Ag-Cu-In-Bi 계 솔더 합금을 설계하였다. 이 설계된 합금은 기존의 유연 솔더인 Sn-Pb와 대표적인 무연 솔더인 Sn-3.5Ag와 각각의 특성을 비교 분석하였다. 젖음성을 평가하기 위하여 wetting balance tester를 이용하여 실험을 행하였고 Differential Scanning Calorimetry(DSC)를 분석하여 젖음 정도와 조성 분석 및 고상점과 액상점 등의 녹음 거동을 확인하였다. 또한 각각의 조성별 전단응력에 따른 파괴 거동을 분석하였다.