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J-C模型中原子—腔场的纠缠随时间的演化 被引量:1
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作者 于立志 《阜阳师范学院学报(自然科学版)》 2007年第2期13-15,37,共4页
分别利用度量纯态纠缠的两种常用方法-von Neumann熵和共生纠缠,探讨了单光子J-C模型中和双光子J-C模型中原子-腔场的纠缠随时间的演化,并得出了此纠缠随时间演化的规律.
关键词 量子信息学 纠缠 J-C模型 von neumann 共生纠缠
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Multiscale Based Local Structurization Information Metric for Robust Pixel Level Image Fusion
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作者 杨志 毛士艺 陈炜 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2005年第4期352-358,共7页
Because previous methods can not identify underlying image features from noises effectively, the updated image fusion schemes will be degraded when inputs are corrupted with noise. The perceptual salient image feature... Because previous methods can not identify underlying image features from noises effectively, the updated image fusion schemes will be degraded when inputs are corrupted with noise. The perceptual salient image features often manifest some geometric structures, while noise dominated images are less structured. Based on complex wavelet transform, a structurization information metric is formulated by means of the Von Neumann entropy. The formulated metric can distinguish image features from noise very well. During the fusion process, the metric is employed to weight all fusion inputs. As a result, the perceptual meaningful inputs are enhanced while the noise inputs are de-emphasized adaptively. Comparing several image fusion schemes subjectively and objectively shows the good performance of the new scheme. 展开更多
关键词 image fusion dual-tree complex wavelet transform yon neumann entropy
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