中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共7条,第1-7条 帮助

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Root elemental composition in Chinese forests: Implications for biogeochemical niche differentiation 期刊论文  iSwitch采集
FUNCTIONAL ECOLOGY, 2018, 卷号: 32, 期号: 1, 页码: 40-49
作者:  
Zhao, Ning;  Liu, Huiming;  Wang, Qiufeng;  Wang, Ruili;  Xu, Zhiwei
收藏  |  浏览/下载:71/0  |  提交时间:2019/10/09
Distribution of shrublands in relation to soil and climate in mid-subtropical China 期刊论文  OAI收割
JOURNAL OF PLANT ECOLOGY, 2016, 卷号: 9, 期号: 4, 页码: 393-401
作者:  
Li, Jiaxiang;  Xiong, Gaoming;  Xu, Wenting;  Xie, Zongqiang
  |  收藏  |  浏览/下载:23/0  |  提交时间:2022/07/08
Trait-based community assembly of aquatic macrophytes along a water depth gradient in a freshwater lake 期刊论文  OAI收割
FRESHWATER BIOLOGY, 2014, 卷号: 59, 期号: 12, 页码: 2462-2471
作者:  
Fu, Hui;  Zhong, Jiayou;  Yuan, Guixiang;  Xie, Ping;  Guo, Longgen
收藏  |  浏览/下载:86/0  |  提交时间:2015/01/20
Phylogenetic clustering and overdispersion for alpine plants along elevational gradient in the Hengduan Mountains Region, southwest China 期刊论文  OAI收割
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2014, 卷号: 52, 期号: 3, 页码: 280-288
作者:  
Li, Xin-Hui;  Zhu, Xin-Xin;  Niu, Yang;  Sun, Hang
收藏  |  浏览/下载:42/0  |  提交时间:2014/06/23
Analysis on the influence of random vibration on MEMS gyro precision and error compensation (EI CONFERENCE) 会议论文  OAI收割
2011 3rd International Conference on Mechanical and Electronics Engineering, ICMEE 2011, September 23, 2011 - September 25, 2011, Hefei, China
作者:  
Li M.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
In order to improve its precision in dynamic environment  a Kalman filter was designed. Firstly  two sets of random drift data of MEMS gyro were respectively analysed  and it was found that the variance of random drift under random vibration significantly increased and its mean also changed. Then calculation results show that attitude angle error under random vibration is 2.6  while in the static test it is 0.25. Analysis on the characteristics of random drift was carried out  and it is found that it can be treated as stable  normally distributed random signal. Finally  a corresponding Kalman filter was designed. The results indicated that after filtering the variance of random drift is reduced to 0.0282  26.4% of pre-filtering and the attitude angle error is reduced to 1.5  57.7% of pre-filtering. The above method can effectively compensate for the attitude angle error of MEMS gyro caused by random vibration. This study can be a reference to the application of low-cost MEMS gyro in aircraft navigation. (2012) Trans Tech Publications  Switzerland.  
Matching of vehicle gps traces with urban road networks 期刊论文  iSwitch采集
Current science, 2010, 卷号: 98, 期号: 12, 页码: 1592-1598
作者:  
Song, Xianfeng;  Raghavan, Venkatesh;  Yoshida, Daisuke
收藏  |  浏览/下载:39/0  |  提交时间:2019/05/10
Inhibition of electromagnetic interference in control system based on DSP of high-power TEA CO2 laser (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者:  
Meng F.-J.;  Guo L.-H.;  Wang H.-Q.
收藏  |  浏览/下载:52/0  |  提交时间:2013/03/25
The strong electromagnetic interference (EMI) generated in high-power TEA C02 laser system mainly comes from main discharge circuit  pulse spark switch and power supply. Such strong EMI causes great damage and interference to the control system based on DSP. In this paper  we present the interference sources and their distribution and propose the methods of anti-interference. Measures for hardware design include weakening transient ground potential difference by using equipotential lines between devices  using signal isolation interface to inhibit the transient ground potential interference  and rational layout  shielding and filtering to the control system. And methods for software design include range-limited filter  self-diagnosis and self-repair for the critical data and anti-interference during abnormal reset. The EMI has been inhibited effectively by the anti-interference method proposed above. The result shows that: the software anti-interference method is as important as the hardware anti-interference method for the control system in a complex environment of strong EMI. 2010 IEEE.