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浏览/检索结果: 共16条，第1-10条 帮助

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Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons 期刊论文  OAI收割
ENVIRONMENTAL POLLUTION, 2019, 卷号: 252, 页码: 1574-1581
作者:  Li, Yingjie;  Zhou, Xiaoxia;  Dong, Lijie;  Lai, Yujian;  Li, Shasha
  |  收藏  |  浏览/下载：25/0  |  提交时间：2020/09/10
微耗损磁固相萃取测定污染物自由溶解态浓度方法研究 学位论文  OAI收割
北京: 中国科学院生态环境研究中心, 2018
作者:  李英杰
  |  收藏  |  浏览/下载：30/0  |  提交时间：2020/07/15
Evaluation of methods to determine adsorption of polycyclic aromatic hydrocarbons to dispersed carbon nanotubes 期刊论文  OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2017, 卷号: 24, 期号: 29, 页码: 23015-23025
作者:  Jenssen, Bjorn M.;  Glomstad, Berit;  Sorensen, Lisbet;  Liu, Jingfu;  Shen, Mohai
  |  收藏  |  浏览/下载：36/0  |  提交时间：2018/07/26
Efficient computation of ultraviolet radiation from bow shock waves 会议论文  OAI收割
The 29th International Symposium on Rarefied Gas Dynamics, 中国陕西西安, 2014-07-13
作者:  Zhang YH(张羽淮);  Wan T(万田);  Jiang JZ(蒋建政);  Fan J(樊菁)
收藏  |  浏览/下载：30/0  |  提交时间：2015/09/10
固相微萃取与磁性固相萃取在环境污染物测定和生物有效性评价中的应用研究 学位论文  OAI收割
博士, 北京: 中国科学院研究生院, 2013
庞龙
收藏  |  浏览/下载：190/0  |  提交时间：2014/08/28
微萃取技术在污染物测定和生物有效性评价中的应用研究 学位论文  OAI收割
博士, 北京: 中国科学院研究生院, 2011
冯迎娣
收藏  |  浏览/下载：77/0  |  提交时间：2011/08/26
Analysis of inertia dyadic uncertainty for small agile satellite with control moment gyros (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
作者:  Zhang L.;  Zhang L.;  Sun Z.
收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25
With the increasing demands for the agility of the next earth imaging satellite  control moment gyro (CMG) is considered to be the most suitable actuator because of its torque amplification capability. However  a CMG system may introduce uncertainty of inertia dyadic to a satellite's attitude control system. The uncertainty is negligible for large space vehicles  but it has not been tested whether it can be ignored for small agile satellites. How to model the CMG system inertia dyadic varying with gimbal angles  and what influence it will put on the performance of attitude control system haven't been test accurately as well. All of them are dealt with mathematically and accurately in this paper. This paper firstly gives mathematic descriptions of the inertia dyadic of the 4-CMG pyramid configuration system  varying with gimbal angles  and then designs a variable structure control law for small agile satellite using CMGs. Finally  numerical simulation suggests that the inertia dyadic variation of a 4-CMG pyramid configuration system is approximately centesimal of the total inertia dyadic of the satellite  and that the designed variable structure control law is of good robust performance for an example of large-angle attitude maneuver  despite of the variation of the inertia dyadic. 2010 IEEE.  
Development of negligible depletion hollow fiber membrane-protected liquid-phase microextraction for simultaneous determination of partitioning coefficients and acid dissociation constants 期刊论文  OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2009, 卷号: 1216, 期号: 12, 页码: 2583-2586
Liu, Jing-fu; Cai, Xiao-qiang; Li, Zi-fu; Jiang, Gui-bin
收藏  |  浏览/下载：18/0  |  提交时间：2015/08/07
Estimation algorithm of mobile OFDM CFOs based on step-size (EI CONFERENCE) 会议论文  OAI收割
2009 International Conference on Information Engineering and Computer Science, ICIECS 2009, December 19, 2009 - December 20, 2009, Wuhan, China
Lin L.; Qiao Y.-F.; Su W.-X.
收藏  |  浏览/下载：29/0  |  提交时间：2013/03/25
In order to maintain orthogonality among subcarriers for mobile OFDM  a CFOs step-size estimation model is established to avoid severe performance degradation caused by ICI  and algorithmic stability  step-size parameter  the error of CFOs estimate and etc are investigated. First  after an averaging window algorithm is introduced  the mathematic model of step-size estimation algorithm is obtained through step-size parameter and time-varying CFOs. Then  based on the results of MATLAB simulation  the determination of step-size parameter  the advantages of step-size algorithm and precision are discussed. Finally  time sequence plots of added CP  interleaver and subcarrier modulation with VHDL are presented. Experimental results indicate that the maximum of CFOs errors is 0.00987 in 3 variance interval  when mobile velocity is 400 km/h  according with verdicted principle that in order for the ICI effects to be negligible  the error of CFOs estimation must be accurate within 1-2% of the subcarrier spacing  and programs can correctly implement on circuit board. 2009 IEEE.  
Impacts of some environmentally relevant parameters on the sorption of polycyclic aromatic hydrocarbons to aqueous suspensions of fullerene 期刊论文  OAI收割
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 2008, 卷号: 27, 期号: 9, 页码: 1868-1874
Hu, Xialin; Liu, Jingfu; Mayer, Philipp; Jiang, Guibin
收藏  |  浏览/下载：29/0  |  提交时间：2015/08/20