中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共7条,第1-7条 帮助

条数/页: 排序方式:
Revealing inconsistency of the sediment-water relationships in the Brahmaputra River: A comparative analysis of upstream and downstream cross-sections 期刊论文  OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2025, 卷号: 22, 期号: 8, 页码: 2819-2836
作者:  
Rahim, Md Abdur;  Liu, Shuang;  Hu, Kaiheng;  Li, Hao;  Islam, Maksudul
  |  收藏  |  浏览/下载:1/0  |  提交时间:2025/09/28
Global evidence on the asymmetric response of gross primary productivity to interannual precipitation changes 期刊论文  OAI收割
SCIENCE OF THE TOTAL ENVIRONMENT, 2022, 卷号: 814, 页码: 9
作者:  
Wang, Yiheng;  Xiao, Jingfeng;  Li, Xing;  Niu, Shuli
  |  收藏  |  浏览/下载:51/0  |  提交时间:2022/09/21
Global evidence on the asymmetric response of gross primary productivity to interannual precipitation changes 期刊论文  OAI收割
SCIENCE OF THE TOTAL ENVIRONMENT, 2022, 卷号: 814, 页码: 9
作者:  
Wang, Yiheng;  Xiao, Jingfeng;  Li, Xing;  Niu, Shuli
  |  收藏  |  浏览/下载:52/0  |  提交时间:2022/09/21
Coseismic displacements caused by point dislocations in a three-dimensional heterogeneous, spherical earth model 期刊论文  iSwitch采集
Geophysical journal international, 2010, 卷号: 183, 期号: 2, 页码: 706-726
作者:  
Fu, Guangyu;  Sun, Wenke;  Fukuda, Yoichi;  Gao, Shanghua
收藏  |  浏览/下载:127/0  |  提交时间:2019/05/10
Cr image enhancement based on human visual characteristics (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer Design and Applications, ICCDA 2010, June 25, 2010 - June 27, 2010, Qinhuangdao, Hebei, China
Zhang M.-H.; Zhang Y.-Y.
收藏  |  浏览/下载:52/0  |  提交时间:2013/03/25
The characteristic of digital CR medicine radiation image has wide dynamic range  abundant details and bad contrast  so it is necessary to enhance CR image to the need of doctor diagnosis. But the general enhancement algorithms don't consider human visual characteristics  so it puts forward CR medicine image adaptive enhancement algorithm combining the human visual property  which is more sensitive to smooth area noise compared with detail area noise  and makes image edge detail enhancement great in detail area  and detail enhancement little in smooth area  in which factor K is based on space change of image domain  accordingly gaining non-linear enhancement edge details of CR image. Experiment results demonstrate that the algorithm enhances CR image detail and CR image enhanced has good visual effect  so the method is fit for edge detail enhancement of CR medicine radiation image. 2010 IEEE.  
A high-speed acquisition and processing system of the laser speckle signal on the magnetic fluid (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者:  
Sun Y.;  Sun Y.;  Wan Q.-H.
收藏  |  浏览/下载:48/0  |  提交时间:2013/03/25
In order to achieve the dynamical detection and real-time analysis of the movement status of the magnetic fluid  according to the difficulties of the detection of the magnetic fluid  established a high-speed acquisition and processing system of laser speckle signal on the magnetic fluid. First of all  the FPGA (EP2C8T144C8N) drived the linear array CCD(TCD1501D) to scan in the corresponding time sequence given by the computer  collected the laser speckle interferometric image in rapid change on the surface of the magnetic fluid  which followed the movement of the magnetic fluid  and the signal collected by CCD was converted into the digital data through the high-speed A/D convertor and stored into the internal buffer FIFO of the FPGA  whose width and depth were designed by the user as required. Then  the FPGA sent the digital signal of the laser speckle interferometric images into the computer through the USB2.0 highspeed differential bus  whose transmission rate can reach 480Mb/s in theory. Finally  the distribution of the laser speckle on the magnetic fluid was messy and random  which carried certain information about the surface of the magnetic fluid  based on the theories of the statistic correlation and the subdivision of images  analysing and processing the laser speckle interferometric images  indirectly got the movement status of the magnetic fluid under the electromagnetic field. The experimental results show that: the High Speed Acquisition and Processing System has the advantage of full-court  non-contact  non-invasive  high-precision and high reliability and so on. The detection resolution of high speed acquisition and processing system is superior to 1m and the sample rate is 3Msps  which basically meets the requirements of the magnetic fluid movement state detection. 2009 SPIE.  
Optimizations for the uniformity of the non-volatile volume grating in doubly doped LiNbO3 crystals 期刊论文  OAI收割
opt. commun., 2005, 卷号: 248, 期号: 1-3, 页码: 27, 33
戴翠霞; 刘立人; 刘德安; 柴志方; Zhu LA
收藏  |  浏览/下载:1916/319  |  提交时间:2009/09/18