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Modeling the encoding structure and spatial resolution of photon counting imagers with Vernier anode readout
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作者 杨颢 赵宝升 +1 位作者 鄢秋荣 刘永安 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第12期65-69,共5页
We present the spatial resolution estimation methods for a photon counting system with a Vernier anode.A limiting resolution model is provided according to discussions of surface encoding structure and quantized noise... We present the spatial resolution estimation methods for a photon counting system with a Vernier anode.A limiting resolution model is provided according to discussions of surface encoding structure and quantized noise. The limiting resolution of a Vernier anode is revealed to be significantly higher than that of a microchannel plate. The relationship between the actual spatial resolution and equivalent noise charge of a detector is established by noise analysis and photon position reconstruction. The theoretical results are demonstrated to be in good agreement with the experimental results for a 1.2 mm pitch Vernier anode. 展开更多
关键词 anode encoding readout deviation limiting cloud photon pitch coordinate suppression
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Branching random walks with random environments in time 被引量:3
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作者 Chuamao HUANG Xingang LIANG Quansheng LIU 《Frontiers of Mathematics in China》 SCIE CSCD 2014年第4期835-842,共8页
We consider a branching random walk on N with a random environment in time (denoted by ξ). Let Zn be the counting measure of particles of generation n, and let Zn(t) be its Laplace transform. We show the converge... We consider a branching random walk on N with a random environment in time (denoted by ξ). Let Zn be the counting measure of particles of generation n, and let Zn(t) be its Laplace transform. We show the convergence of the free energy n-llog Zn(t), large deviation principles, and central limit theorems for the sequence of measures {Zn}, and a necessary and sufficient condition for the existence of moments of the limit of the martingale Zn(t)/E[Zn(t)ξ]. 展开更多
关键词 Branching random walk random environment large deviation central limit theorem MOMENT
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