In this paper,an iterative regularized super resolution (SR) algorithm considering non-Gaussian noise is proposed.Based on the assumption of a generalized Gaussian distribution for the contaminating noise,an lp norm i...In this paper,an iterative regularized super resolution (SR) algorithm considering non-Gaussian noise is proposed.Based on the assumption of a generalized Gaussian distribution for the contaminating noise,an lp norm is adopted to measure the data fidelity term in the cost function.In the meantime,a regularization functional defined in terms of the desired high resolution (HR) image is employed,which allows for the simultaneous determination of its value and the partly reconstructed image at each iteration step.The convergence is thoroughly studied.Simulation results show the effectiveness of the proposed algorithm as well as its superiority to conventional SR methods.展开更多
设计了高斯白噪声激励下的三稳态Van der Pol电路随机动力学实验系统,并从响应的时间历程图、相图、稳态概率密度图三方面,实验研究了高斯白噪声强度变化对系统三稳态切换行为的影响。结果表明,随着激励强度增加,不同吸引子间的切换频...设计了高斯白噪声激励下的三稳态Van der Pol电路随机动力学实验系统,并从响应的时间历程图、相图、稳态概率密度图三方面,实验研究了高斯白噪声强度变化对系统三稳态切换行为的影响。结果表明,随着激励强度增加,不同吸引子间的切换频率显著改变,并且概率密度曲线上的峰之间相对高低发生变化,实验数据点在相图上的分布逐渐趋于均衡化,概率密度曲线峰的数目发生变化,通过与理论结果对比,定性验证了随机P分岔现象的发生。展开更多
基金National Natural Science Foundations of China(No.60705012,No.60802025)
文摘In this paper,an iterative regularized super resolution (SR) algorithm considering non-Gaussian noise is proposed.Based on the assumption of a generalized Gaussian distribution for the contaminating noise,an lp norm is adopted to measure the data fidelity term in the cost function.In the meantime,a regularization functional defined in terms of the desired high resolution (HR) image is employed,which allows for the simultaneous determination of its value and the partly reconstructed image at each iteration step.The convergence is thoroughly studied.Simulation results show the effectiveness of the proposed algorithm as well as its superiority to conventional SR methods.
文摘设计了高斯白噪声激励下的三稳态Van der Pol电路随机动力学实验系统,并从响应的时间历程图、相图、稳态概率密度图三方面,实验研究了高斯白噪声强度变化对系统三稳态切换行为的影响。结果表明,随着激励强度增加,不同吸引子间的切换频率显著改变,并且概率密度曲线上的峰之间相对高低发生变化,实验数据点在相图上的分布逐渐趋于均衡化,概率密度曲线峰的数目发生变化,通过与理论结果对比,定性验证了随机P分岔现象的发生。
