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Xu Kai,Liu Lin,Li Wenhui,Sun Xiaoqing,Shen Tongxu,Pan Feng,Jiang Yuqing,Guo Yan,Ding Lei,Zhang Mengchao 대한영상의학회 2020 Korean Journal of Radiology Vol.21 No.6
Objective: The presence of coagulative necrosis (CN) in clear cell renal cell carcinoma (ccRCC) indicates a poor prognosis, while the absence of CN indicates a good prognosis. The purpose of this study was to build and validate a radiomics signature based on preoperative CT imaging data to estimate CN status in ccRCC. Materials and Methods: Altogether, 105 patients with pathologically confirmed ccRCC were retrospectively enrolled in this study and then divided into training (n = 72) and validation (n = 33) sets. Thereafter, 385 radiomics features were extracted from the three-dimensional volumes of interest of each tumor, and 10 traditional features were assessed by two experienced radiologists using triple-phase CT-enhanced images. A multivariate logistic regression algorithm was used to build the radiomics score and traditional predictors in the training set, and their performance was assessed and then tested in the validation set. The radiomics signature to distinguish CN status was then developed by incorporating the radiomics score and the selected traditional predictors. The receiver operating characteristic (ROC) curve was plotted to evaluate the predictive performance. Results: The area under the ROC curve (AUC) of the radiomics score, which consisted of 7 radiomics features, was 0.855 in the training set and 0.885 in the validation set. The AUC of the traditional predictor, which consisted of 2 traditional features, was 0.843 in the training set and 0.858 in the validation set. The radiomics signature showed the best performance with an AUC of 0.942 in the training set, which was then confirmed with an AUC of 0.969 in the validation set. Conclusion: The CT-based radiomics signature that incorporated radiomics and traditional features has the potential to be used as a non-invasive tool for preoperative prediction of CN in ccRCC.
New functional glasses containing semiconductor quantum dots
Xu, Kai,Heo, Jong Royal Swedish Academy of Sciences 2010 Physica scripta Vol.2010 No.t139
<P>CdSe and PbSe quantum dots (QDs) were precipitated in oxide glass matrices and their optical properties were investigated. The size of QDs could be controlled using careful heat treatment. The quantum confinement effect was clearly observed, as evidenced by a shift in the peak wavelengths of absorption. It was possible to control also the wavelength of the photoluminescence bands of CdSe and PbSe QDs by using thermal treatment.</P>
CLIMATOLOGY, TREND ANALYSIS AND PREDICTION OF SANDSTORMS AND THEIR ASSOCIATED DUSTFALL IN CHINA
SUN, LENG,ZHOU, XUKAI,LU, JUNTIAN,KIM, YONG-PYO,CHUNG, YONG-SEUNG 한국교원대학교 환경과학연구소 2004 환경연구논문집 Vol.- No.8
Based on statistical data about Sand and Dust Storms (SDS) and their associated dustfall, features of temporal and spatial distribution were studied first in this aiticle. SDS and associated dustfalls occurred most often in northern China, especially northwestern China. However, in the last two years, they have a tendency to occur on the central and western parts of the Inner Mongolia Autonomous Region. As a result, Beijing is now among the impact areas, and the Chinese government is paying greater attention to the matter. The changing trends of SDS and associated dustfalls were subsequently analyzed. Occurrences were seen to be decreasing with the feature of fluctuation during the period of 1954-2001, but they have slightly increased since 2000. Also, climate factors related to SDS and associated dustfalls were discussed. Finally, it was recommended that methods to predict SDS in China be further studied in the future.
Jang, Yoon Hee,Xin, Xukai,Byun, Myunghwan,Jang, Yu Jin,Lin, Zhiqun,Kim, Dong Ha American ChemicalSociety 2012 NANO LETTERS Vol.12 No.1
<P>Graphitic thin films embedded with highly dispersed titaniumdioxide(TiO<SUB>2</SUB>) nanoparticles were incorporated for the first timeinto the conventional dye-sensitized solar cells (DSSCs), resultingin a remarkably improved cell efficiency due to its superior electronconductivity. Massively ordered arrays of TiO<SUB>2</SUB> dots embeddedin carbon matrix were fabricated via UV-stabilization of polystyrene-<I>block</I>-poly(4-vinylpyridine) films containing TiO<SUB>2</SUB> precursors followed by direct carbonization. For dye-sensitizedTiO<SUB>2</SUB> based solar cells containing carbon/TiO<SUB>2</SUB> thin layers at both sides of pristine TiO<SUB>2</SUB> layer, anincrease of 40.6% in overall power conversion efficiency was achievedcompared with neat TiO<SUB>2</SUB>-based DSSCs. Such a remarkablyimproved cell efficiency was ascribed to the superior electron conductivityand extended electron lifetime elucidated by cyclic voltammetry andimpedance spectroscopy.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2012/nalefd.2012.12.issue-1/nl203901m/production/images/medium/nl-2011-03901m_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl203901m'>ACS Electronic Supporting Info</A></P>
Xie, Shanshan,Yang, Xukai,Gao, Yahui,Jiao, Wenjie,Li, Xinghua,Li, Yajie,Ning, Zhonghua Asian Australasian Association of Animal Productio 2017 Animal Bioscience Vol.30 No.10
Objective: The Bashang Long-tail chicken (BS), an indigenous Chinese breed, is considered cold tolerant. We selected BS, the Rhode Island Red (RIR), and their reciprocal crossbreds for the present study. The objectives were: i) to validate whether BS is cold tolerant and whether egg production and cold tolerance of crossbreds could be improved; and ii) to determine the physiological characteristics that underlie cold tolerance and favorable egg production performance in cold environments. Methods: A total of 916 chickens were reared in warm and natural cold environments (daily mean ambient temperature varied from $7.4^{\circ}C$ to $26.5^{\circ}C$ in the warm environment and from $-17.5^{\circ}C$ to $27.0^{\circ}C$ in the cold environment). To investigate their adaptability to the cold environment, the egg production performance and body weight were monitored and compared between breeds and environments. The cloacal temperature and serum biochemical parameters were monitored to reveal the physiological characteristics underlie cold tolerance and favorable egg production performance in the cold environment. Results: The warm environment experiment showed that RIR had the highest egg production performance, and that the reciprocal crossbreds had a higher egg production performance than BS. While in the cold environment RIR had the lowest egg production performance, and the reciprocal crossbreds had a higher egg production performance than BS. In the cold environment BS and reciprocal crossbreds had higher triiodothyronine, tetraiodothyronine levels than RIR. At 35 and 39 wk of age, when the ambient temperature was extremely low (varied from $-20^{\circ}C$ to $0^{\circ}C$), serum glucose, follicle-stimulating hormone, luteinizing hormone, estradiol of BS and crossbreds were higher than RIR. Conclusion: Bashang Long-tail chicken has a favorable cold tolerance ability. Crossbreeding with RIR and BS is an effective way to develop cold tolerant chickens with improved egg production performance.