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Wide-bandwidth drift-scan pulsar surveys of globular clusters:application to early science observations with FAST
《Research in Astronomy and Astrophysics》2016年第10期11-20,共10页Lei Zhang George Hobbs Di Li Duncan Lorimer Jie Zhang Meng Yu You-Ling Yue Pei Wang Zhi-Chen Pan Shi Dai 
the support from the professorship award under the Chinese Academy of Sciences(CAS) President's International Fellowship Initiative(PIFI) in 2015;the support from the Guizhou Scientific Collaboration Program (No.20130421);the support from the National Natural Science Foundation of China(NSFC, Nos.11305133 and 11273020);the support from NSFC(No.Y411101N01)the support from NSFC(No.11103045);grants from NSFC (No.11373038);the support by National Basic Research Program of China(973 program) Nos.2012CB821800 and 2015CB57100
The Five-hundred-meter Aperture Spherical Telescope （FAST） will begin its early-science oper- ations during 2016. Drift-scan pulsar surveys will be carried out during this period using an ultra-wide-band receiver sy...
关键词：pulsars -- drift-scan pulsar surveys -- globular clusters 
A 37 GHz wide-band programmable divide-by-N frequency divider for millimeter-wave silicon-based phase-locked loop frequency synthesizers
《Journal of Zhejiang University-Science C(Computers and Electronics)》2014年第12期1200-1210,共11页Ting GUO Zhi-qun LI Qin LI Zhi-gong WANG 
Project supported by the National Basic Research Program of China(No.2010CB327404);the National Natural Science Foundation of China(No.60901012)
A 37 GHz wide-band programmable divide-by-N frequency divider(FD) composed of a divide-by-2 divider(acting as the first stage) and a divider with a division ratio range of 273–330(acting as the second stage) has been...
关键词：WIDE-BAND Divide-by-N Frequency divider Dynamic current-mode logic(DCML) Pulse and swallow counters CMOS 
Generation and noise analysis of a wide-band optical frequency comb based on recirculating frequency shifter
《Chinese Optics Letters》2014年第10期1-4,共4页于瀛 雷诚 陈明华 陈宏伟 杨四刚 谢世钟 
supported by the National 973 Program of China(No.2012CB315703);the National Natural Science Foundation of China(Nos.61132004,61335002,61322113,and 61120106001);the Program for New Century Excellent Talents in University(No.NCET-10-0520);the Young top-notch Talent Program sponsored by Ministry of Organization,China;the Tsinghua University Initiative Scientific Research Program
By optimizing the gain configuration and length of the loop, a 90-tone optical frequency comb （OFC） is successfully generated based on recirculating frequency shifter structure. The peak-to-peak power fluctuation of...
关键词：Natural frequencies 
Energy transfer process between Eu^(3+) and wide-band-gap SnO_2 nanocrystals in silica films studied by photoluminescence excitation and time-resolved photoluminescence techniques被引量：2
《Chinese Science Bulletin》2014年第12期1285-1290,共6页Xiaowei Zhang Pei Zhang Shaobing Lin Jun Xu Tao Lin Ling Xu Kunji Chen 
supported by the National Basic Research Program of China(2013CB632101);the National Natural Science Foundation of China(11274155)
Eu3+ions embedded in silica thin films codoped with SnO2 nanocrystals were fabricated by sol–gel and spin-coating methods.SnO2 nanocrystals with controllable sizes were synthesized through precisely controlling the S...
关键词：光致发光激发光谱 SNO2纳米晶 纳米晶体 时间分辨 能量传递过程 铕离子 硅薄膜 光谱技术 
Wide-bandwidth, high-gain, low-temperature cofired ceramic magneto-electric dipole antenna and arrays for millimeter wave radio-over-fiber systems
《Photonics Research》2014年第4期40-44,共5页Zheng Guo Huiping Tian Xudong Wang Yuefeng Ji 
by the National 973 Program under Grant No.2012CB315705;the NSFC under Grant No.61372038,the National 863 Program under Grant No.2011AA010306;and the Fund of the State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),China。
The designs of magneto-electric(ME)dipole antennas and 4×4 planar arrays on low-temperature cofired ceramic(LTCC)substrates are presented for radio-over-fiber(ROF)systems.The ME dipole antenna covers the four 2.16 GH...
关键词：antenna fiber MILLIMETER 
IMPACT OF WIDE-BAND I/Q MODULATION ERRORS IN SAR IMAGING ANALYSIS AND COMPENSATION METHOD RESAERCH
《Journal of Electronics(China)》2013年第3期222-230,共9页Qiao Ming Wang Jie Zhou Liangjiang LI Daojing 
Supported by 863 Program (2009AA12Z103);973 Program (2009CB72400)
Direct quadrature modulation technology is suitable for wide-band radar signal generation. However, this method has rigorous requirements on amplitude and phase balance of the orthogonal input signals. If the requirem...
关键词：Direct quadrature conversion Amplitude and phase unbalance Oscillator leakage Image frequency suppression Synthetic Aperture Radar (SAR) Interferometric SAR (In SAR) 
A Wide-Band Metamaterial Absorber Based on Loaded Magnetic Resonators被引量：1
《Chinese Physics Letters》2011年第6期312-314,共3页GU Chao QU Shao-Bo PEI Zhi-Bin MA Hua XU Zhuo BAI Peng PENG Wei-Dong LIN Bao-Qin 
by the National Natural Science Foundation of China under Grant Nos 50632030,60871027,60901029 and 61071058;the National Basic Research Program of China under Grant No 2009CB623306;the National Natural Science Foundation of Shaanxi Province under Grant No SJ08F01.
A wide-band polarization-insensitive and wide-angle metamaterial absorber based on loaded magnetic resonators is presented.The unit cell of this absorber consists of a magnetic resonator loaded with lumped resistances...
关键词：POLARIZATION RESONATOR ABSORBER 
Universal spin-dependent variable range hopping in wide-band-gap oxide ferromagnetic semiconductors被引量：1
《Chinese Physics B》2010年第3期477-481,共5页代由勇 颜世申 田玉峰 陈延学 刘国磊 梅良模 
Project supported by the National Basic Research Program of China (Grant Nos. 2007CB924903 and 2009CB929202);the National Natural Science Foundation of China (Grant No. 10974120)
This paper proposes a universal spin-dependent variable range hopping theoretical model to describe various experimental transport phenomena observed in wide-band-gap oxide ferromagnetic semiconductors with high trans...
关键词：variable range hopping ferromagnetic semiconductors electrical transport spin polar-ization 
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