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Journal of Materials Science & Technology 2020年第24期59卷 195-202页

作者： Kyungeun Jung Du Hyeon Kim Jaemin Kim Sunglim Ko Jae Won Choi Ki Chul Kim sang-geul lee Man-Jong lee Department of Advanced Technology Fusion Konkuk UniversitySeoul05029Republic of Korea a Department of Chemistry Konkuk UniversitySeoul05029Republic of Korea Department of Mechanical Design and Production Engineering Konkuk UniversitySeoul05029Republic of Korea Division of Chemical Engineering Konkuk UniversitySeoul05029Republic of Korea Daegu Center Korea Basic Science InstituteDaegu41566Republic of Korea

The effect of ultraviolet-ozone(UVO)irradiation on amorphous(am)SnO_(2) and its impact on the photoconversion efficiency of MAPbI3-based perovskite solar cells were investigated in *** treatment was found to increase the amount of chemisorbed oxygen on the am-SnO_(2) surface,reducing the surface energy and contact *** changes in the am-SnO_(2) surface lowered the Gibbs free energy for the densification of perovskite films and facilitated the formation of homogeneous perovskite *** addition,the Fermi energy of the UVO-treated am-SnO_(2) shifted upwards to achieve an ideal band offset for MAPbI3,which was verified by theoretical calculations based on the density functional *** achieved a champion efficiency of 19.01% with a statistical reproducibility of 17.01±1.34% owing to improved perovskite film densification and enhanced charge transport/extraction,which is considerably higher than the 13.78±2.15% of the ***,UVO-treated,am-SnO_(2)-based devices showed improved stability and less hysteresis,which is encouraging for the future application of up-scaled perovskite solar cells.

关键词： UV-ozone Amorphous SnO_(2) Electron selective layers Planar perovskite solar cells Hysteresis

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用多核固体核磁共振研究CsH_2PO_4和CsH_5(PO_4)_2的制备(英文)

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波谱学杂志 2010年第3期27卷 436-444页

作者： Seen Ae CHAE Young Eun lee Oc Hee HAN sang geul lee 韩国基础科学研究院大丘中心忠南国立大学分析科学技术研究生院

探讨可能用作燃料电池固体酸电解质的化合物CsH2PO4(CDP)和CsH5(PO4)2(CPDP)的制备.CDP和CPDP混合物由摩尔比1:4的Cs2CO3:H3PO4水溶液结晶而成,而CDP和Cs2HPO4.1 .5 H2O( H-DCHP)混合物依其摩尔比1:2的水溶液制备.甲醇清洗能最有效地将... 详细信息

探讨可能用作燃料电池固体酸电解质的化合物CsH2PO4(CDP)和CsH5(PO4)2(CPDP)的制备.CDP和CPDP混合物由摩尔比1:4的Cs2CO3:H3PO4水溶液结晶而成,而CDP和Cs2HPO4.1 .5 H2O( H-DCHP)混合物依其摩尔比1:2的水溶液制备.甲醇清洗能最有效地将CDP从其混合物中分离出来.CDP、CPDP以及H-DCHP的33Cs和31P魔角旋转谱以及CPDP和H-DCHP的1H魔角旋转谱均为首次报道,对各化合物的谱峰做了指认.说明,透过确认合成的电解质以及合成过程所产生的副产物,多核固体核磁共振对于控制固体酸电解质合成的品质是一个非常有用的工具.

关键词：固体核磁共振固体酸电解质 CsH2PO4 CsH5(PO4)2 133Cs魔角旋转NMR 31P魔角旋转NMR 1H魔角旋转NMR

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Nasal cavity fungus ball discovered accidentally:A case report

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World Journal of Clinical Cases 2025年第5期13卷 44-48页

作者： Dae-Neung lee Dong Hoon lee sang Chul Lim Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolHwasun HospitalChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolKwangju 501190South Korea

BACKGROUND Fungal balls within the nasal cavity are an exceedingly rare clinical entity,typically presenting with nonspecific symptoms or being identified *** SUMMARY This report presents an incidental discovery of a fungal ball in the nasal cavity during routine imaging,with no associated clinical *** This case underscores the importance of considering the possibility of asympto-matic presentations of nasal fungal balls,which may be detected incidentally during imaging evaluations.

关键词： Fungi Mycoses Fungus ball Nasal cavity Nasal surgical procedures Case report

Heuristic solution using decision tree model for enhanced XML schema matching of bridge structural calculation documents

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1403-1417页

作者： sang IPARK sang-Ho lee Department of Civil Environmental and Architectural EngineeringUniversity of Colorado at BoulderBoulderco 80309USA Department of"Civil and Environmental Engineering Yonsei UniversitySeoul 03722Korea

Research on the quality of data in a structural calculation document(SCD)is lacking,although the SCD ofa bridge is used as an essential reference during the entire lifecycle of the *** Schema matching enables qualitative improvement of the stored *** study aimed to enhance the applicability of XML Schema matching,which improves the speed and quality of information stored in bridge ***,the authors proposed a method of reducing the computing time for the schema matching of bridge *** computing speed of schema matching was increased by 13 to 1800 times by reducing the checking process of the ***,the authors developed a heuristic solution for selecting the optimal weight factors used in the matching process to maintain a high accuracy by introducing a decision *** decision tree model was built using the content elements stored in the SCD,design companies,bridge types,and weight factors as input variables,and the matching accuracy as the target *** inverse-calculation method was applied to extract the weight factors from the decision tree model for high-accuracy schema matching results.

关键词： structural calculation document bridge structure XML Schema matching weight factor data mining decision tree model

Correlation of microstructure with tensile behavior and properties of API X70 pipeline steels subjected to strain aging

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Journal of Iron and Steel Research International 2020年第3期27卷 319-324页

作者： sang-in lee Byoungchul Hwang Department of Materials Science and Engineering Seoul National University of Science and TechnologySeoul 01811Republic of Korea

Variations in tensile behavior and properties after pre-strain and thermal aging were differently affected by strain aging phenomenon dependent on *** increasing polygonal ferrite fraction,decrement in uniform elongation is increased,and the increment in yield-to-tensile ratio is slightly decreased after pre-strain and thermal ***,it can be concluded that the polygonal ferrite has contradictory effects on strain aging resistance although the polygonal ferrite still contributes to improvement of uniform elongation after strain aging.

关键词： Steel Microstructure Strain aging Deformability Pipeline

A Routing Protocol for Urban Vehicular Multi-hop Data Delivery

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Chinese Journal of Electronics 2016年第2期25卷 348-356页

作者： CHANG sang-woo lee sang-sun Department of Electronic Engineering Hanyang University

Vehicular ad-hoc network(VANET) has distinctive environments such as highly dynamic topology, frequently disconnected network, hard delay constraints for safety-related application, and various communications environments based on highway or urban traffic scenarios. Therefore, development of a suitable routing protocol that considers these characteristics of VANET should be needed. In this paper we propose the improved distance-based VANET routing protocol in urban traffic environments. We apply approaches to multi-hop broadcast scheme for reliable packet dissemination in the intersection and stable route decision scheme based on the adaptive waiting time. The performance is evaluated under simulation which is implemented with the Manhattan urban traffic model. The results show the improved performance as compared with other protocols.

关键词： Distance-based routing protocol Vehicle-to-vehicle communication Waiting time Urban traffic environments Vehicular ad-hoc network(VANET)

Transparent Supercapacitors: From Optical Theories to Optoelectronics Applications

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Energy & Environmental Materials 2020年第3期3卷 265-285页

作者： sang-Woo Kim sang-Young lee Department of Energy Engineering School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 689-798Korea

The ever-increasing demand for smart optoelectronics spurs the relentless pursuit of transparent wireless devices as a game-changing technology that can provide unseen visual information behind the *** enable successful operation of the transparent wireless devices,their power sources should be highly transparent in addition to acquiring reliable electrochemical *** various transparent power sources,supercapacitors(SCs)have been extensively investigated as a promising candidate due to their exceptional cyclability,power capability,material diversity,and scalable/low-cost ***,we describe current status and challenges of transparent SCs,with a focus on their core materials,performance advancements,and integration with application devices.A special attention is devoted to transparent conductive electrodes(TCEs)which act as a keyenabling component in the transparent *** on fundamental understanding of optical theories and operating principles of transparent materials,we comprehensively discuss materials chemistry,structural design,and fabrication techniques of *** addition,noteworthy progresses of transparent SCs are briefly overviewed in terms of their architectural design,opto-electrochemical performance,flexibility,form factors,and integration compatibility with transparent flexible/wearable devices of ***,development direction and outlook of transparent SCs are explored along with their viable roles in future application fields.

关键词： energy storage flexibility optoelectronics transparent conductive electrodes transparent supercapacitors

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Scalable and safer printed Zn//MnO2 planar micro-batteries for smart electronics

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National Science Review 2020年第1期7卷 5-6页

作者： sang-Young lee Department of Energy Engineering Ulsan National Institute of Science and Technology

The rapidly growing field of miniaturized smart electronics has forced us to search for compatible microscale power sources with reliable electrochemical performance, various form factors, manufacturing scalability, and safety [1–5].Among the several power sources reported to date, planar micro-batteries,which are characterized by geometrical

关键词： Scalable and safer printed Zn MnO2 planar micro-batteries for smart electronics

A Study on Cascade R-CNN-Based Dangerous Goods Detection Using X-Ray Image

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Computers, Materials & Continua 2022年第11期73卷 4245-4260页

作者： sang-Hyun lee Department of Computer Engineering Honam UniversityGwangsanguGwangju 62399Korea

X-ray inspection equipment is divided into small baggage inspection equipment and large cargo inspection *** the case of inspection using X-ray scanning equipment,it is possible to identify the contents of goods,unauthorized transport,or hidden goods in real-time by-passing cargo through X-rays without opening *** this paper,we propose a system for detecting dangerous objects in X-ray images using the Cascade Region-based Convolutional Neural Network(Cascade R-CNN)model,and the data used for learning consists of dangerous goods,storage media,firearms,and *** addition,to minimize the overfitting problem caused by the lack of data to be used for artificial intelligence(AI)training,data samples are increased by using the CP(copy-paste)algorithm on the existing *** also solves the data labeling problem by mixing supervised and semi-supervised *** four comparative models to be used in this study are Faster Regionbased Convolutional Neural Networks Residual2 Network-101(Faster R-CNN_Res2Net-101)supervised learning,Cascade R-CNN_Res2Net-101_supervised learning,Cascade Region-based Convolutional Neural Networks Composite Backbone Network V2(CBNetV2)Network-101(Cascade R-CNN_CBNetV2Net-101)_supervised learning,and Cascade RCNN_CBNetV2-101_semi-supervised learning which are then compared and *** a result of comparing the performance of the four models in this paper,in case of Cascade R-CNN_CBNetV2-101_semi-supervised learning,Average Precision(AP)(Intersection over Union(IoU)=0.5):0.7%,AP(IoU=0.75):1.0%than supervised learning,Recall:0.8%higher.

关键词： Cascade R-CNN model faster R-CNN model X-ray screening equipment Res2Net supervised learning semi-supervised learning

A Study on Classification and Detection of Small Moths Using CNN Model

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Computers, Materials & Continua 2022年第4期71卷 1987-1998页

作者： sang-Hyun lee Department of Computer Engineering Honam UniversityGwangsanguGwangju62399South Korea

Currently,there are many limitations to classify images of small *** addition,there are limitations such as error detection due to external factors,and there is also a disadvantage that it is difficult to accurately distinguish between various *** paper uses a convolutional neural network(CNN)algorithm to recognize and classify object images of very small moths and obtain precise data images.A convolution neural network algorithm is used for image data classification,and the classified image is transformed into image data to learn the topological structure of the *** improve the accuracy of the image classification and reduce the loss rate,a parameter for finding a fast-optimal point of image classification is set by a convolutional neural network and a pixel image as a *** a result of this study,we applied a convolution neural network algorithm to classify the images of very small moths by capturing precise images of the *** results showed that the accuracy of classification of very small moths was more than 90%.

关键词： Convolution neural network rectified linear unit activation function pooling feature map