http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
효율적인 feature map 추출 네트워크를 이용한 2D 이미지에서의 3D 포인트 클라우드 재구축 기법
김정윤,이승호,Kim, Jeong-Yoon,Lee, Seung-Ho 한국전기전자학회 2022 전기전자학회논문지 Vol.26 No.3
In this paper, we propose a 3D point cloud reconstruction technique from 2D images using efficient feature map extraction network. The originality of the method proposed in this paper is as follows. First, we use a new feature map extraction network that is about 27% efficient than existing techniques in terms of memory. The proposed network does not reduce the size to the middle of the deep learning network, so important information required for 3D point cloud reconstruction is not lost. We solved the memory increase problem caused by the non-reduced image size by reducing the number of channels and by efficiently configuring the deep learning network to be shallow. Second, by preserving the high-resolution features of the 2D image, the accuracy can be further improved than that of the conventional technique. The feature map extracted from the non-reduced image contains more detailed information than the existing method, which can further improve the reconstruction accuracy of the 3D point cloud. Third, we use a divergence loss that does not require shooting information. The fact that not only the 2D image but also the shooting angle is required for learning, the dataset must contain detailed information and it is a disadvantage that makes it difficult to construct the dataset. In this paper, the accuracy of the reconstruction of the 3D point cloud can be increased by increasing the diversity of information through randomness without additional shooting information. In order to objectively evaluate the performance of the proposed method, using the ShapeNet dataset and using the same method as in the comparative papers, the CD value of the method proposed in this paper is 5.87, the EMD value is 5.81, and the FLOPs value is 2.9G. It was calculated. On the other hand, the lower the CD and EMD values, the better the accuracy of the reconstructed 3D point cloud approaches the original. In addition, the lower the number of FLOPs, the less memory is required for the deep learning network. Therefore, the CD, EMD, and FLOPs performance evaluation results of the proposed method showed about 27% improvement in memory and 6.3% in terms of accuracy compared to the methods in other papers, demonstrating objective performance.
Efficacy of Herbal Medicines for the Treatment of Seborrheic Dermatitis : Systematic Review
김정윤,장영우,김혜경,임승환,Kim, Jeong-Yoon,Jang, Young-Woo,Kim, Hye-Gyeong,Lim, Seung-Hwan The Society of Korean Medicine Ophthalmology 2018 한방안이비인후피부과학회지 Vol.31 No.3
목적 : 체계적 문헌고찰을 통하여 지루피부염에 한약복용의 효과와 연구의 질을 평가하기 위함. 방법 : OASIS, NDSL, EMBASE, Pubmed, Cochrane Library, CINAHL, CNKI, WANFANG, CiNii, J-STAGE를 이용하여 검색하였다. 검색은 2018년 6월 21일에 시행되었으며 P는 지루성 피부염, I는 한약 복용으로 진행하였다. 두 명의 연구자가 독립적으로 연구를 평가하고 선정하였으며, 의견이 다를 경우 제 3자가 개입하여 다수결로 결정하였다. 결과 : 중복 검색을 제외하고 총 952개의 연구가 검색되었으며 제목과 초록을 검토한 결과 897개의 연구가 제외되었다. 나머지 55개 연구의 전문을 검토한 결과 4개의 RCT연구가 최종 선정되었다. 선정된 연구는 발행연도, 대상, 중재법, 평가방법, 효과, 부작용, RoB를 통해 평가하였다. 한약 복용을 한 치료군에서 대조군에 비해 유의하게 호전을 보였으며 중대한 부작용은 없었다. 결론 : 지루성 피부염에 있어 한약 복용은 효과적이며 안전성이 있는 하나의 치료법이다. 향후 다양하고 체계적인 RCT의 시행이 요구된다.
규조기반 전이함수를 활용한 Holocene 중기 이후 고창군 신덕리 일대의 정량적 해수면 변동
김정윤 ( Kim Jeong-yun ),윤순옥 ( Yoon Soon-ock ),양동윤 ( Yang Dong Yoon ),황상일 ( Hwang Sangill ) 한국지형학회 2017 한국지형학회지 Vol.24 No.3
This study is quantitative reconstruction of palaeo sea level records around Sinduk-ri, Gochang- Gun. 7 cores were collected from GC14 to GC18 in order to examine the entire sedimentary facies and reconstruct the sea level records. The cores were analysed by AMS, sedimentary facies, diatom and WA-pls. As a result of the diatom analysis, diatom zone were classified as No diatom zone, B1 zone, M zone and B2 zone. The result of WA-pls was that the sea level was about 1.5m lower than the present level around 6,000 BP and about 1m lower during last 5,000 BP. Thereafter, sea level rose to the present during the Mc subdiatom zone period. Moreover, during the Md sub-diatom zone period, sea level was about 0.5m higher than the present.
비주거 건축물에서 에너지효율등급과 에너지성능지표의 상관관계에 관한 연구
김정윤(Jeong Yoon Kim),김정혁(Jung Hyuk Kim),조영욱(Yeong Uk Cho),김영일(Young Il Kim),정광섭(Kwang-Seop Chung) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Our country has a higher level of energy dependence and therefore rely on imports from foreign countries and energy demand structure is vulnerable. Thus, there exist various energy policies related to the energy performance of buildings which will aim for the greenhouse gas reduction target in building sector. This study analyzes correlation between primary energy consumption per area and energy performance index in certified energy efficient non-residential buildings. 35 non-residential buildings were used and the analysis showed that there was low correlation between these two. Energy saving plan can introduce errors on evaluation of overall energy performance of the building due to incompleteness of application items. Therefore there is a need to change the evaluation approach which will evaluate the energy performance by its annual energy consumption.
한반도 고해수면 변동 복원을 위한 규조-환경변수 상관관계 연구: 곰소만 동부 조간대 지역을 대상으로
김정윤 ( Kim Jeong-yun ),윤순옥 ( Yoon Soon-ock ),양동윤 ( Yang Dong Yoon ),황상일 ( Hwang Sang Ill ) 한국지형학회 2017 한국지형학회지 Vol.24 No.2
This study investigated the correlation between the diatom community and the environmental variables on the tidal flat surface of the eastern part of Gomso Bay in the West coast of Korea in order to utilize the quantitative sea level record as a basic data. 24 sediment samples at 10cm intervals downstream of the Galgok Stream were used for diatom analysis, grain size analysis and CCA. As a result of diatom analysis, marine diatoms dominated at lower altitudes and the ratio of diatoms to fresh water diatoms and brackish diatoms increased toward upland. As a result of CCA, the contribution of environmental variables was analyzed as 25.3% at altitude, 21.6% at sand, 13.3% at skewness, etc. This means that altitude above sea level has the greatest influence on the diatom composition in th e tidal flat surface. It suggests that the contribution of environmental variables at altitude above sea level can be used as a basic data for the quantitative records for reconstruction of paleo-sea level.