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Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018 期刊论文
CLIMATE DYNAMICS, 2022, 页码: 23
作者:  Zhang, Rong-Hua;  Zhou, Guanghui;  Zhi, Hai;  Gao, Chuan;  Wang, Hongna
收藏  |  浏览/下载：26/0  |  提交时间：2022/11/11
Effects of various inlet-gas mediums on apparent permeability of concrete under steady-state flow: Comparison between carbon-dioxide and oxygen 期刊论文
Cement and Concrete Composites, 2021, 卷号: 119
作者:  Qian, Rusheng;  Liu, Cheng;  Liu, Guojian;  Liu, Zhiyong;  Pang, Bo
收藏  |  浏览/下载：11/0  |  提交时间：2021/04/12
Prediction of the critical properties of mixtures based on group contribution theory 期刊论文
Journal of Molecular Liquids, 2018, 卷号: 271, 页码: 313-318
作者:  He, Maogang;  Wang, Chengjie;  Chen, Junshuai;  Liu, Xiangyang
收藏  |  浏览/下载：2/0  |  提交时间：2019/11/26
Modeling the Relative Contributions of Land Use Change and Harvest to Forest Landscape Change in the Taihe County, China 期刊论文
SUSTAINABILITY, 2017, 卷号: 9, 期号: 5, 页码: 17
作者:  Wu, Zhuo;  Ge, Quansheng;  Dai, Erfu
收藏  |  浏览/下载：9/0  |  提交时间：2019/09/25
Carbon stocks and changes of dead organic matter in China's forests 期刊论文
NATURE COMMUNICATIONS, 2017
Zhu, Jianxiao; Hu, Huifeng; Tao, Shengli; Chi, Xiulian; Li, Peng; Jiang, Lai; Ji, Chengjun; Zhu, Jiangling; Tang, Zhiyao; Pan, Yude; Birdsey, Richard A.; He, Xinhua; Fang, Jingyun
收藏  |  浏览/下载：116/0  |  提交时间：2017/12/03
Chemical and isotopic characterization of carbonaceous aerosols from an intensive aerosol sampling in Shanghai, China 会议论文
作者:  Cao, Jun-Ji;  Zhu, Chong-Shu
收藏  |  浏览/下载：7/0  |  提交时间：2019/12/10
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.; Yan Y.; Xu K.; Jin G.
收藏  |  浏览/下载：41/0  |  提交时间：2013/03/25
With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.  
A closure study of aerosol hygroscopic growth factor during the 2006 Pearl River Delta Campaign 期刊论文
大气科学进展英文版, 2010
Liu Xingang; Zhang Yuanhang; Wen Mengting; Wang Jingli; Jung, Jinsang; Chang Shih-yu; Hu Min; Zeng Limin; Kim, Young Joon
收藏  |  浏览/下载：4/0  |  提交时间：2015/11/10

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