A quantum dynamic calculation on a five-dimensional O2/LiF （001） model system is performed using themulti-configuration time-dependent Hartree method.The obtained results show that the mechanism of rotational anddif...A quantum dynamic calculation on a five-dimensional O2/LiF （001） model system is performed using themulti-configuration time-dependent Hartree method.The obtained results show that the mechanism of rotational anddiffractive excitation in details: Comparison with the rotational excited state, the initially non-rotational state is seento favor the inelastic scattering in the rotational excitation process.The surface corrugation can damp the quantuminterferences and produce a greater amount of rotational inelastic scattering at the expense of the elastic process inthe rotational excitation process.The diffraction process and the average energy transferred into the rotational anddiffractive mode are also discussed.展开更多
传统的离焦深度恢复方法(depth from defocus,DFD)在计算离焦图像的模糊程度时,均是基于几何光学成像原理,并没有考虑光波衍射对图像模糊的影响.然而,衍射现象是波的基本特性,以针孔成像为基础的光学成像系统中必然存在光波衍射.本文基...传统的离焦深度恢复方法(depth from defocus,DFD)在计算离焦图像的模糊程度时,均是基于几何光学成像原理,并没有考虑光波衍射对图像模糊的影响.然而,衍射现象是波的基本特性,以针孔成像为基础的光学成像系统中必然存在光波衍射.本文基于光学衍射和图像模糊机理,提出了一种精确的单目视觉全局景物3D深度信息获取方法.首先,详细分析了光学成像系统中的菲涅耳衍射机理,建立了衍射模糊与景物深度之间的关系曲线;然后,采用曲线拟合的方式建立了衍射模糊的模糊程度(点扩散函数扩散程度)与景物深度的数学关系模型,结合热辐射和图像相对模糊原理,构建了衍射模糊热辐射方程组,并把衍射模糊深度获取问题转换成一个深度信息动态优化问题.最后,使用标准的纳米栅格模板验证了衍射模糊深度重建算法在纳米尺度相对深度和绝对深度重建中的有效性和精确性.展开更多
O436.1 2002020850菲涅耳衍射及柯林斯公式的快速傅里叶变换计算=Accurate calculation of Fresnel diffraction andCollins’formula by using fast Fourier transform[刊,中]/李俊昌(昆明理工大学激光应用研究所.云南,昆明(650093))...O436.1 2002020850菲涅耳衍射及柯林斯公式的快速傅里叶变换计算=Accurate calculation of Fresnel diffraction andCollins’formula by using fast Fourier transform[刊,中]/李俊昌(昆明理工大学激光应用研究所.云南,昆明(650093))∥光电子·激光.—2001,12(5).展开更多
基金Support by the National Natural Science Foundation of China under Grant No.10776022 the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20090181110080
文摘A quantum dynamic calculation on a five-dimensional O2/LiF （001） model system is performed using themulti-configuration time-dependent Hartree method.The obtained results show that the mechanism of rotational anddiffractive excitation in details: Comparison with the rotational excited state, the initially non-rotational state is seento favor the inelastic scattering in the rotational excitation process.The surface corrugation can damp the quantuminterferences and produce a greater amount of rotational inelastic scattering at the expense of the elastic process inthe rotational excitation process.The diffraction process and the average energy transferred into the rotational anddiffractive mode are also discussed.
文摘传统的离焦深度恢复方法(depth from defocus,DFD)在计算离焦图像的模糊程度时,均是基于几何光学成像原理,并没有考虑光波衍射对图像模糊的影响.然而,衍射现象是波的基本特性,以针孔成像为基础的光学成像系统中必然存在光波衍射.本文基于光学衍射和图像模糊机理,提出了一种精确的单目视觉全局景物3D深度信息获取方法.首先,详细分析了光学成像系统中的菲涅耳衍射机理,建立了衍射模糊与景物深度之间的关系曲线;然后,采用曲线拟合的方式建立了衍射模糊的模糊程度(点扩散函数扩散程度)与景物深度的数学关系模型,结合热辐射和图像相对模糊原理,构建了衍射模糊热辐射方程组,并把衍射模糊深度获取问题转换成一个深度信息动态优化问题.最后,使用标准的纳米栅格模板验证了衍射模糊深度重建算法在纳米尺度相对深度和绝对深度重建中的有效性和精确性.
文摘O436.1 2002020850菲涅耳衍射及柯林斯公式的快速傅里叶变换计算=Accurate calculation of Fresnel diffraction andCollins’formula by using fast Fourier transform[刊,中]/李俊昌(昆明理工大学激光应用研究所.云南,昆明(650093))∥光电子·激光.—2001,12(5).
