以就业为导向的信息管理专业人才培养模式研究区域经济均衡发展对高校毕业生就业的影响及对策.docVIP

19 Optimization of long-period grating inscribed in large mode area photonic crystal fiber for design of bandstop filter??Original Research ArticleOptik - International Journal for Light and Electron Optics, Volume 122, Issue 1, January 2011, Pages 58-62Faramarz E. Seraji, S. Farsinezhad, Leila Chehreghani Anzabi ?Close preview??|?? Related articles??|??Related reference work articles???? AbstractAbstract | Figures/TablesFigures/Tables | ReferencesReferences Abstract By inscribing long period grating (LPG) in a photonic crystal fiber (PCF), optical filters for communication wavelengths can be fabricated. In this paper, by utilizing coupled-mode theory and enhanced improved vectorial effective index method, a design of bandstop filter based on optimal LPG parameters is presented where the optimized full-width half-maximum (FWHM), the number (N) and total length of gratings of LPGs (L) are determined. As a result, by the determination of optimized LPG parameters with an optimum length of Lopt=6.5?mm and optimum number of grating Nopt=27 inscribed in the PCF, a bandstop optical filter with FWHM=1?nm is designed. Article Outline 1. Introduction 2. Determination of grating period 3. Transmission response of stopband filter 4. Conclusion Acknowledgements References Purchase 20 Efficient multi-hop scheduling algorithms for packet transmissions in WDM optical star networks??Original Research ArticleAEU - International Journal of Electronics and Communications, Volume 64, Issue 12, December 2010, Pages 1186-1191Hann-Jang Ho ?Close preview??|?? Related articles??|??Related reference work articles???? AbstractAbstract | Figures/TablesFigures/Tables | ReferencesReferences Abstract This paper proposes multi-hop scheduling algorithms for the All-to-All Broadcast (AAB) problem in Wavelength Division Multiplexed (WDM) optical star networks. The multi-hop AAB problem can be split into two subproblems: Logical Topologies Construction (LTC) problem, and Transmission Sch