为了降低闪光照相中散射的影响和提高法国试验客体(French test object,FTO)重建的精度,结合不同准直角下散射不同的特性,提出了不同准直角的双轴闪光照相布局,并进行了相应的数值模拟实验。研究结果表明:不同准直角双轴闪光照相中散射...为了降低闪光照相中散射的影响和提高法国试验客体(French test object,FTO)重建的精度,结合不同准直角下散射不同的特性,提出了不同准直角的双轴闪光照相布局,并进行了相应的数值模拟实验。研究结果表明:不同准直角双轴闪光照相中散射的相互干扰非常严重,且主要来于前保护器件,需使用铅板屏蔽。根据信息融合特性和降低散射影响的要求确定了FTO不同准直角双轴闪光照相的两个准直角分别为2.24°和1.15°。从该不同准直角的双轴闪光照相系统模拟得到的图像重建出了均方根误差小于5.8%的密度分布,结果远优于单轴照相23%的均方根误差。展开更多
In this paper,the author sums up some essential knowledge from the practiceabout rebuilding traditional buildings and gardens in which the author has been engagedrecently.The view points are that one should discard th...In this paper,the author sums up some essential knowledge from the practiceabout rebuilding traditional buildings and gardens in which the author has been engagedrecently.The view points are that one should discard the dross and select the essential,re-tain the symbolic form,grasp the overall style,embody local characteristics and space outthe distance of time and space between the new and old buildings.Finally,the author con-siders that the traditional form of buildings should not be used indiscriminately at allplaces in modern times.展开更多
文摘为了降低闪光照相中散射的影响和提高法国试验客体(French test object,FTO)重建的精度,结合不同准直角下散射不同的特性,提出了不同准直角的双轴闪光照相布局,并进行了相应的数值模拟实验。研究结果表明:不同准直角双轴闪光照相中散射的相互干扰非常严重,且主要来于前保护器件,需使用铅板屏蔽。根据信息融合特性和降低散射影响的要求确定了FTO不同准直角双轴闪光照相的两个准直角分别为2.24°和1.15°。从该不同准直角的双轴闪光照相系统模拟得到的图像重建出了均方根误差小于5.8%的密度分布,结果远优于单轴照相23%的均方根误差。
文摘In this paper,the author sums up some essential knowledge from the practiceabout rebuilding traditional buildings and gardens in which the author has been engagedrecently.The view points are that one should discard the dross and select the essential,re-tain the symbolic form,grasp the overall style,embody local characteristics and space outthe distance of time and space between the new and old buildings.Finally,the author con-siders that the traditional form of buildings should not be used indiscriminately at allplaces in modern times.