中国科学院机构知识库网格
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A new extinct conifer Brachyoxylon from the Middle Jurassic in southern China: Wood anatomy, leaf phenology and paleoclimate 期刊论文  OAI收割
REVIEW OF PALAEOBOTANY AND PALYNOLOGY, 2023, 卷号: 317, 页码: 11
作者:  
Xie, Aowei;  Wang, Yongdong;  Tian, Ning;  Uhl, Dieter
  |  收藏  |  浏览/下载:18/0  |  提交时间:2023/10/09
A more southerly occurrence of Xenoxylon in North America: X. utahense Xie et Gee sp. nov. from the Upper Jurassic Morrison Formation in Utah, USA, and its paleobiogeographic and paleoclimatic significance 期刊论文  OAI收割
REVIEW OF PALAEOBOTANY AND PALYNOLOGY, 2021, 卷号: 291, 页码: 13
作者:  
Xie, Aowei;  Gee, Carole T.;  Bennis, Mary Beth;  Gray, Dale;  Sprinkel, Douglas A.
  |  收藏  |  浏览/下载:39/0  |  提交时间:2021/09/07
蒙古西部哈尔赫拉河长期季节性气候特征与模拟及其对径流影响 学位论文  OAI收割
北京: 中国科学院大学, 2019
作者:  
Shinebayar Otgon
  |  收藏  |  浏览/下载:68/0  |  提交时间:2021/12/10
Underestimated ecosystem carbon turnover time and sequestration under the steady state assumption: A perspective from long-term data assimilation 期刊论文  OAI收割
GLOBAL CHANGE BIOLOGY, 2019, 卷号: 25, 期号: 3, 页码: 938-953
作者:  
Ge, Rong;  He, Honglin;  Ren, Xiaoli;  Zhang, Li;  Yu, Guirui
  |  收藏  |  浏览/下载:148/0  |  提交时间:2019/04/22
Runoff sensitivity to global mean temperature change in the CMIP5 Models 期刊论文  OAI收割
GEOPHYSICAL RESEARCH LETTERS, 2014, 卷号: 41, 期号: 15, 页码: 5492-5498
作者:  
Zhang, Xuezhen;  Tang, Qiuhong
收藏  |  浏览/下载:18/0  |  提交时间:2014/11/01
Runoff sensitivity to global mean temperature change in the CMIP5 Models SCI/SSCI论文  OAI收割
2014
Zhang X. J.; Tang Q. H.; Zhang X. Z.; Lettenmaier D. P.
收藏  |  浏览/下载:22/0  |  提交时间:2014/12/24
The Research of real time auto-recognition of the moire fringe (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Wang M.-J.; Wu Z.-G.
收藏  |  浏览/下载:19/0  |  提交时间:2013/03/25
Measuring the movement of raster by the method of moire fringe has the advantage of high sensitivity  high resolution and non-contacted measurement. The characteristic of moire fringe is that the image is white alternate with black  the angle of the stripes is uniform  the width of the stripes is uniform  the terminators of the stripes aren't clear. A fast method that can figure out the width and angle of the moire fringe precisely is put forward in this paper. It calculates the angle the stripes firstly. According to the principle of the minimum mean squared error (MMSE)  the closer a series of data is  the smaller the value of the MMSE will be. The method is described as follows: It takes the image's center as the origin  180 beelines pass through the origin with the same angle interval. it calculates the value of the minimum mean squared error of the 180 beelines and find out the least one among those  then the angle of the moire fringe comes out primarily. In order to improving the calculating precision of moire fringe  60 equal angles are divided in the neighborhood of the angle  then a precise angle of moire fringe is calculated according to the principle of the MMSE. After getting out the angle of the moire fringe  we begin to calculate the width of moire fringe. A line vertical with the moire fringe is drawn  and we can get the width of the moire fringe by the vertical line. In order to get over the influence of the noise  an effective area with the shape of diamond is selected in the image. The data of area is accumulated and projected according to the direction of moire fringe  and a sine curve come out. The width of moire fringe can be obtained by getting the position of the first wave crest  the position of the last wave crest and the number of wave crest. Experiments prove that the precision of the method put forward in this paper is enhanced in comparison with the traditional frequency method  the precision of width calculation achieves to 99.6% according to the evaluation indicators of width detection error. The computing speed is boosted largely compared with traditional method  and it can achieve with 15 ms  that satisfying the demand of real time. 2011 SPIE.  
Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China 期刊论文  OAI收割
JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA, 2006, 卷号: 18, 期号: 5, 页码: 1024-1030
作者:  
Guo Ran;  Xiao-ke, Wang;  Ouyang Zhi-yun;  Li Ying-nian
收藏  |  浏览/下载:18/0  |  提交时间:2015/10/13
Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China 期刊论文  OAI收割
journal of environmental sciences-china, 2006, 卷号: 18, 期号: 5, 页码: 1024-1030
作者:  
Guo Ran;  Xiao-ke, Wang;  Ouyang Zhi-yun;  Li Ying-nian
收藏  |  浏览/下载:24/0  |  提交时间:2009/11/17