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浏览/检索结果: 共9条,第1-9条 帮助

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Survival of whole-rock Sm-Nd isotope system from REE redistribution and mineral-scale isotopic resetting amid hydrothermal alteration in REE-rich Fe-Cu deposit 期刊论文  OAI收割
GEOCHIMICA ET COSMOCHIMICA ACTA, 2023, 卷号: 348, 页码: 9-26
作者:  
Su, Zhi-Kun;  Zhao, Xin-Fu;  Wang, Christina Yan;  Zhu, Zhi-Min;  Song, Wen-Lei
  |  收藏  |  浏览/下载:14/0  |  提交时间:2024/09/26
Crystallization and Solidification of Poikilitic and Granular Rocks in the Ultramafic Sequence of the Xinjie Layered Intrusion (SW China): Constraints from Complex Growth Zoning of Clinopyroxene and Spatial Variation of Dihedral Angles 期刊论文  OAI收割
JOURNAL OF PETROLOGY, 2023, 卷号: 64, 期号: 2, 页码: egad007
作者:  
Cao, Yonghua;  Xing, Chang-Ming;  Wang, Christina Yan
  |  收藏  |  浏览/下载:12/0  |  提交时间:2024/09/26
Complex Semblance and Its Application 期刊论文  OAI收割
JOURNAL OF EARTH SCIENCE, 2019, 卷号: 30, 期号: 4, 页码: 849-852
作者:  
Shi, Taikun;  Huo, Shoudong
  |  收藏  |  浏览/下载:57/0  |  提交时间:2019/10/14
Determination of boron concentration in uranium fuel samples by ICP-OES following a separation step by cation exchange resin 期刊论文  OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2018, 卷号: 29, 期号: 3, 页码: -
作者:  
Luo, Y;  Cong, HX;  Cui, RR;  Cao, CQ;  Zhou, W
  |  收藏  |  浏览/下载:38/0  |  提交时间:2018/09/06
Differentiation of the early silicate Earth as recorded by Nd-142-Nd-143 in 3.8-3.0 Ga rocks from the Anshan Complex, North China Craton 期刊论文  OAI收割
PRECAMBRIAN RESEARCH, 2017, 卷号: 301, 页码: 86-101
作者:  
Li, Chao-Feng;  Wang, Xuan-Ce
  |  收藏  |  浏览/下载:38/0  |  提交时间:2017/12/18
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:108/0  |  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).  
Instantaneous polarization filtering focused on suppression of surface waves 期刊论文  OAI收割
Applied Geophysics, 2010, 卷号: 7, 期号: 1, 页码: 88-97
作者:  
Yun Wang;  Chun-Ying Yang;  Jun Lu
  |  收藏  |  浏览/下载:12/0  |  提交时间:2017/12/21
A complex scaling approach to sequential Feynman integrals 期刊论文  OAI收割
STOCHASTIC PROCESSES AND THEIR APPLICATIONS, 1999, 卷号: 79, 期号: 2, 页码: 287-300
作者:  
Luo, SL;  Yan, JA
  |  收藏  |  浏览/下载:23/0  |  提交时间:2018/07/30
微量元素在色素类结石形成中的作用初探 期刊论文  OAI收割
微量元素与健康研究, 1995, 卷号: 12, 期号: 3, 页码: 5-6
作者:  
王爱勤
收藏  |  浏览/下载:13/0  |  提交时间:2015/07/09