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Estimating the number of components in an OSL decay curve using the Bayesian Information Criterion 期刊论文  OAI收割
GEOCHRONOMETRIA, 2014, 卷号: 41, 期号: 4, 页码: 334-341
作者:  
Peng, Jun;  Dong, Zhibao;  Han, Fengqing;  Han, Yuanhong;  Dai, Xueling
  |  收藏  |  浏览/下载:29/0  |  提交时间:2018/09/26
Estimating the number of components in an OSL decay curve using the Bayesian Information Criterion 期刊论文  OAI收割
GEOCHRONOMETRIA, 2014, 卷号: 41, 期号: 4, 页码: 334-341
作者:  
Peng, Jun;  Dong, Zhibao;  Han, Fengqing;  Han, Yuanhong;  Dai, Xueling
  |  收藏  |  浏览/下载:42/0  |  提交时间:2018/09/26
Estimating the number of components in an OSL decay curve using the Bayesian Information Criterion 期刊论文  OAI收割
GEOCHRONOMETRIA, 2014, 卷号: 41, 期号: 4, 页码: 334-341
作者:  
Peng, Jun;  Dong, Zhibao;  Han, Fengqing;  Han, Yuanhong;  Dai, Xueling
  |  收藏  |  浏览/下载:36/0  |  提交时间:2018/06/20
Laser pulse coded signal frequency measuring device based on DSP and CPLD (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, May 24, 2011 - May 26, 2011, Beijing, China
作者:  
Zhang H.-B.;  Wang T.-F.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
Laser pulse code is an anti-jamming measures used in semi-active laser guided weapons. On account of the laser-guided signals adopting pulse coding mode and the weak signal processing  it need complex calculations in the frequency measurement process according to the laser pulse code signal time correlation to meet the request in optoelectronic countermeasures in semi-active laser guided weapons. To ensure accurately completing frequency measurement in a short time  it needed to carry out self-related process with the pulse arrival time series composed of pulse arrival time  calculate the signal repetition period  and then identify the letter type to achieve signal decoding from determining the time value  number and rank number in a signal cycle by Using CPLD and DSP for signal processing chip  designing a laser-guided signal frequency measurement in the pulse frequency measurement device  improving the signal processing capability through the appropriate software algorithms. In this article  we introduced the principle of frequency measurement of the device  described the hardware components of the device  the system works and software  analyzed the impact of some system factors on the accuracy of the measurement. The experimental results indicated that this system improve the accuracy of the measurement under the premise of volume  real-time  anti-interference  low power of the laser pulse frequency measuring device. The practicality of the design  reliability has been demonstrated from the experimental point of view.  
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:28/0  |  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.