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浏览/检索结果: 共12条，第1-10条 帮助

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Atmospheric wet deposition of trace metal elements: Monitoring and modelling 期刊论文  OAI收割
SCIENCE OF THE TOTAL ENVIRONMENT, 2023, 卷号: 893, 页码: 15
作者:  Li, Dan;  Zheng, Jie;  Yang, Mengrong;  Meng, Yang;  Yu, Xu
  |  收藏  |  浏览/下载：11/0  |  提交时间：2024/08/23
Coupled Li-P Zoning and Trace Elements of Olivine from Magmatic Ni-Cu Deposits: Implications for Postcumulus Re-Equilibration in Olivine 期刊论文  OAI收割
JOURNAL OF PETROLOGY, 2022, 卷号: 63, 期号: 3, 页码: 22
作者:  Mao, Ya-Jing;  Schoneveld, Louise;  Barnes, Stephen J.;  Williams, Morgan J.;  Su, Ben-Xun
  |  收藏  |  浏览/下载：32/0  |  提交时间：2022/07/07
Semisupervised Learning With Parameter-Free Similarity of Label and Side Information 期刊论文  OAI收割
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS, 2019, 卷号: 30, 期号: 2, 页码: 405–414
作者:  Zhang, Rui;  Nie, Feiping;  Li, Xuelong
  |  收藏  |  浏览/下载：32/0  |  提交时间：2019/03/20
Development of new method for D/H ratio measurements for volatile hydrocarbons of crude oils using solid phase micro-extraction (SPME) coupled to gas chromatography isotope ratio mass spectrometry (GC-IRMS) 期刊论文  OAI收割
MARINE AND PETROLEUM GEOLOGY, 2018, 卷号: 89, 页码: 232-241
作者:  Li, Zhongping;  Li, Liwu;  Xing, Lantian;  Liu, Yan;  Zhang, Mingjie
  |  收藏  |  浏览/下载：60/0  |  提交时间：2019/10/10
Intercomparison of two cavity ring-down spectroscopy analyzers for atmospheric (CO2)-C-13/(CO2)-C-12 measurement SCI/SSCI论文  OAI收割
2016
作者:  Pang J. P.;  Wen, X. F.;  Sun, X. M.;  Huang, K.
  |  收藏  |  浏览/下载：28/0  |  提交时间：2017/11/09
Development of new method of delta C-13 measurement for trace hydrocarbons in natural gas using solid phase micro-extraction coupled to gas chromatography isotope ratio mass spectrometry 期刊论文  OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2014, 卷号: 1372, 页码: 228-235
作者:  Li, Zhongping;  Wang, Xibin;  Li, Liwu;  Zhang, Mingjie;  Tao, Mingxin
  |  收藏  |  浏览/下载：32/0  |  提交时间：2018/09/26
Development of new method of delta C-13 measurement for trace hydrocarbons in natural gas using solid phase micro-extraction coupled to gas chromatography isotope ratio mass spectrometry 期刊论文  OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2014, 卷号: 1372, 页码: 228-235
作者:  Li, Zhongping;  Wang, Xibin;  Li, Liwu;  Zhang, Mingjie;  Tao, Mingxin
  |  收藏  |  浏览/下载：21/0  |  提交时间：2018/09/26
Development of new method of delta C-13 measurement for trace hydrocarbons in natural gas using solid phase micro-extraction coupled to gas chromatography isotope ratio mass spectrometry 期刊论文  OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2014, 卷号: 1372, 页码: 228-235
作者:  Li, Zhongping;  Wang, Xibin;  Li, Liwu;  Zhang, Mingjie;  Tao, Mingxin
  |  收藏  |  浏览/下载：28/0  |  提交时间：2018/09/26
Research on infrared dim-point target detection and tracking under sea-sky-line complex background (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  Dong Y.-X.;  Zhang H.-B.;  Li Y.;  Li Y.;  Li Y.
收藏  |  浏览/下载：111/0  |  提交时间：2013/03/25
Target detection and tracking technology in infrared image is an important part of modern military defense system. Infrared dim-point targets detection and recognition under complex background is a difficulty and important strategic value and challenging research topic. The main objects that carrier-borne infrared vigilance system detected are sea-skimming aircrafts and missiles. Due to the characteristics of wide field of view of vigilance system  the target is usually under the sea clutter. Detection and recognition of the target will be taken great difficulties.There are some traditional point target detection algorithms  such as adaptive background prediction detecting method. When background has dispersion-decreasing structure  the traditional target detection algorithms would be more useful. But when the background has large gray gradient  such as sea-sky-line  sea waves etc.The bigger false-alarm rate will be taken in these local area.It could not obtain satisfactory results. Because dim-point target itself does not have obvious geometry or texture feature  in our opinion  from the perspective of mathematics  the detection of dim-point targets in image is about singular function analysis.And from the perspective image processing analysis  the judgment of isolated singularity in the image is key problem. The foregoing points for dim-point targets detection  its essence is a separation of target and background of different singularity characteristics.The image from infrared sensor usually accompanied by different kinds of noise. These external noises could be caused by the complicated background or from the sensor itself. The noise might affect target detection and tracking. Therefore  the purpose of the image preprocessing is to reduce the effects from noise  also to raise the SNR of image  and to increase the contrast of target and background. According to the low sea-skimming infrared flying small target characteristics  the median filter is used to eliminate noise  improve signal-to-noise ratio  then the multi-point multi-storey vertical Sobel algorithm will be used to detect the sea-sky-line  so that we can segment sea and sky in the image. Finally using centroid tracking method to capture and trace target. This method has been successfully used to trace target under the sea-sky complex background. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
Semi-supervised orthogonal discriminant analysis via label propagation 期刊论文  OAI收割
PATTERN RECOGNITION, 2009, 卷号: 42, 期号: 11, 页码: 2615-2627
作者:  Nie, Feiping;  Xiang, Shiming;  Jia, Yangqing;  Zhang, Changshui
收藏  |  浏览/下载：20/0  |  提交时间：2015/08/12