中国科学院机构知识库网格
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沙化和退化状态对甘南草地生态系统固碳的影响 CNKI期刊论文  OAI收割
2022
作者:  
唐希颖;  武红;  董金玮;  刘小燕;  李伟
  |  收藏  |  浏览/下载:15/0  |  提交时间:2022/09/30
Assessing the Atmospheric Oxygen Balance in a Region of Rapid Urbanization: A Case Study in the Pearl River Delta, China SCI/SSCI论文  OAI收割
2015
作者:  
Peng J.;  Wang, A.;  Liu, Y. X.;  Liu, W. D.
收藏  |  浏览/下载:26/0  |  提交时间:2015/12/09
Packaging technology of polymer/Si arrayed waveguide grating and their environmental stability (EI CONFERENCE) 会议论文  OAI收割
2005 6th International Conference on Electronics Packaging Technology, August 30, 2005 - September 2, 2005, Dameisha, Shenzhen, China
作者:  
Zhang Y.;  Zhang X.;  Zhang X.;  Zhang X.;  Wang F.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Future optical communication systems will use more of the exceptional high bandwidth of optical fiber. Wavelength division multiplexing (WDM) systems are well suited to transport terabits of information via the fiber[1]. Multiplexers/ demultiplexers (MUX/DEMUX) are essential components for dense WDM systems. Several different kinds of multiplexer types have been developed in the past: (a) interference filters  (b) fiber gratings  and (c) planar lightwave circuit (PLC) MUX/DEMUXers[2  3]. The planar fabrication process of the last mentioned PLCs allows the realization of high performance filters with a large number of wavelength channels. Further  an integration with other optical elements seems to be possible. Arrayed waveguide gratings (AWG) are a special kind of PLC-MUX/DEMUXers  which are very attractive components for WDM systems because of their great flexibility in filter design[4  5]. Basically  an AWG is an optical spectrograph built in planar waveguide technique. Typically  AWGs works in a high grating order (50-250). For AWG multiplexer applications in communications systems a precise wavelength controllability and wavelength stability with long term is demanded. Recently  a polymeric (especially fluorinated polymer with low optical absorption loss in the infrared region) AWG has attracted much attention because of its easy fabrication  low cost possibility and a potential of integration with other polymer devices[6]. Standard AWGs  however  show a change of center wavelength with temperature. A method to prevent this temperature drift is to package the AWG together with a temperature controller in order to tune and fix the desired filter-wavelength. In this paper  a 32-channel AWG was fabricated using a cross-linkable fluorinated poly (ether ether ketone) (FPEEK)  its package technology and environmental stability were also discussed. 2005 IEEE.  
中国西部地区净初级生产力及碳循环研究 学位论文  OAI收割
博士, 中国科学院寒区旱区环境与工程研究所: 中国科学院寒区旱区环境与工程研究所, 2003
卢玲
收藏  |  浏览/下载:144/0  |  提交时间:2013/08/22
Cloning and characterization of a blood coagulation factor IX-binding protein from the venom of Trimeresurus stejnegeri 期刊论文  OAI收割
TOXICON, 2003, 卷号: 41, 期号: 7, 页码: 765-772
作者:  
Lee WH;  Zhuang QY;  Zhang Y[*]
收藏  |  浏览/下载:17/0  |  提交时间:2010/08/24