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8条,第1-8条 帮助

条数/页: 排序方式:
Adjusted-range self-normalized confidence interval construction for censored dependent data 期刊论文  OAI收割
ECONOMICS LETTERS, 2022, 卷号: 220, 页码: 5
作者:  
Sun, Jiajing;  Hong, Yongmiao;  Linton, Oliver;  Zhao, Xiaolu
  |  收藏  |  浏览/下载:25/0  |  提交时间:2023/02/07
Adjusted Log-rank Test with Double Inverse Weighting under Dependent Censoring 期刊论文  OAI收割
ACTA MATHEMATICA SINICA-ENGLISH SERIES, 2021, 卷号: 37, 期号: 10, 页码: 1573-1585
作者:  
Guo, Yi Min;  Zhou, Jie;  Sun, Liu Quan
  |  收藏  |  浏览/下载:14/0  |  提交时间:2022/04/02
The spatial pattern of grassland aboveground biomass on Xizang Plateau and its climatic controls SCI/SSCI论文  OAI收割
2015
作者:  
Jiang Y. B.;  Tao, J.;  Huang, Y. Q.;  Zhu, J. T.;  Tian, L.
收藏  |  浏览/下载:34/0  |  提交时间:2015/12/09
Estimation of the NorthSouth Transect of Eastern China forest biomass using remote sensing and forest inventory data SCI/SSCI论文  OAI收割
2013
Gao Y. H.; Liu X. X.; Min C. C.; He H. L.; Yu G. R.; Liu M.; Zhu X. D.; Wang Q.
收藏  |  浏览/下载:21/0  |  提交时间:2014/12/24
Dynamic closed-loop test for real-time drift angle adjustment of space camera on the Earth (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:  
Xu S.;  Wang D.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
In order to eliminate the influence of aircraft attitude angle to the image quality of space camera  and assure that the drift angle of space camera could be accurately adjusted at the orbit  a novel closed-loop test method is provided for real-time drift angle adjustment of space camera on the Earth. A long focal length dynamic aim generator is applied to simulate the image motion and the variety drift angle  and to detect the precision of the image motion compensation machinery and the capability of the drift angle control system. The computer system is used to control the dynamic aim generator  accomplish the data processing  transmit and receive the data information. The seamless connection and the data transmission between the aim generator and the aircraft simulation devices are constituted. The command  parameter and drift angle data transmitted by the simulation devices are received by the space camera at the real time  then the photos are taken and the draft angle is adjusted simultaneously. It is shown that the drift angle can be accurately tracked by the space camera at the real time  and the detective method satisfies the test requirement. 2010 Copyright SPIE - The International Society for Optical Engineering.  
DirectShow application in LED panel display system (EI CONFERENCE) 会议论文  OAI收割
2009 International Conference on Information Technology and Computer Science, ITCS 2009, July 25, 2009 - July 26, 2009, Kiev, Ukraine
Tao L.; Ding T.-F.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
A new DirectShow application in the field of LED Panel display system is shown in this paper. It realizes video processing functions with DirectShow architecture on computer. Source Filter and many Transform Filters  which provided by Microsoft Co.  transform source video into RGB24 format. Then  the video data are scaled up/down to LED panel resolution by Fixformat Filter which inherite CTramsformfilter baseclass. After that  the R/G/B values of video data are adjusted in CCorrect Filter to adapt LED Panel display. Finally  the processed video is shown on LED Wall through DVI or VGA interface. Our experimental results demonstrate that this system makes a good performance. It is greatly simplify the functions of Sending-Board  Receiving Board  and Control-Scanning-Board in display system of the LED Wall. The total cost will be cut down observably  if we can transplant the filters into the embedded platform  to build a special video processing system for LED Panel display. 2009 IEEE.  
Space camera imaging gain in-orbit adjusting strategy (EI CONFERENCE) 会议论文  OAI收割
2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009, October 10, 2009 - October 11, 2009, Changsha, Hunan, China
作者:  
Wang J.;  He X.
收藏  |  浏览/下载:17/0  |  提交时间:2013/03/25
A Multi-Step Gain Adjusting Strategy (MSGAS) of space camera was proposed  which was used to get higher SNR (Signal-Noise Rate) image. When the space camera working in poor light condition  the CCD signal was so weak that it's difficult to get a clear image  to reduce the quantization noise and improve the SNR  we must amplify the CCD signal first and then quantize. The MSGAS was achieved by adjusting the gain of the CCD (Charge Couple Device) signal processor step by step  the upper limit and lower limit were set  if the MDN (Mean Digital Number) of a fixed length image data was not between the lower and upper limit  the gain was adjusted step by step. In the experiment  the upper limit  lower limit and the step were set  and the result of the experiment showed that MSGAS was robust and SNR was improved from 28 to 39. 2009 IEEE.  
Livestock in China: Commodity-specific total factor productivity decomposition using new panel data SCI/SSCI论文  OAI收割
2006
Rae A. N.; Ma H. Y.; Huang J. K.; Rozelle S.
收藏  |  浏览/下载:22/0  |  提交时间:2012/06/08