中国科学院机构知识库网格系统: 检索

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	Salinity interdecadal variability in the western equatorial Pacific and its effects during 1950-2018 期刊论文 OAI收割 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：29/0 \| 提交时间：2022/11/11 The western equatorial Pacific Salinity interdecadal variability Compensated and uncompensated effects Relative contributions EEMD method
	Carbon Sink under Different Carbon Density Levels of Forest and Shrub, a Case in Dongting Lake Basin, China 期刊论文 OAI收割 REMOTE SENSING, 2022, 卷号: 14, 期号: 11, 页码: 2672 作者: Kong, Lingqiao; Lu, Fei; Rao, Enming; Ouyang, Zhiyun \| 收藏 \| 浏览/下载：14/0 \| 提交时间：2022/11/07 BIOMASS CARBON SPATIAL-DISTRIBUTION TERRESTRIAL ECOSYSTEMS RELATIVE CONTRIBUTIONS ABOVEGROUND BIOMASS CLIMATE-CHANGE RESTORATION STORAGE POLICY EXPANSION
	Estimation of the relative contributions of forest areal expansion and growth to China's forest stand biomass carbon sequestration from 1977 to 2018 期刊论文 OAI收割 JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2021, 卷号: 300, 页码: 9 作者: Zhao, Miaomiao; Yang, Jilin; Zhao, Na; Xiao, Xiangming; Yue, Tianxiang \| 收藏 \| 浏览/下载：29/0 \| 提交时间：2022/09/21 Carbon sinks Relative contributions Areal expansion Biomass C density Forest inventories China
	Estimation of the relative contributions of forest areal expansion and growth to China's forest stand biomass carbon sequestration from 1977 to 2018 期刊论文 OAI收割 JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2021, 卷号: 300, 页码: 9 作者: Zhao, Miaomiao; Yang, Jilin; Zhao, Na; Xiao, Xiangming; Yue, Tianxiang \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2022/09/21 Carbon sinks Relative contributions Areal expansion Biomass C density Forest inventories China
	Modeling the Relative Contributions of Land Use Change and Harvest to Forest Landscape Change in the Taihe County, China 期刊论文 OAI收割 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：15/0 \| 提交时间：2019/09/25 land use change forest landscape relative contributions CA-Markov model LANDIS-II
	Modeling the Relative Contributions of Land Use Change and Harvest to Forest Landscape Change in the Taihe County, China 期刊论文 OAI收割 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：20/0 \| 提交时间：2019/09/25 land use change forest landscape relative contributions CA-Markov model LANDIS-II
	Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文 OAI收割 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：47/0 \| 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.