加速器中利用荧光靶系统测量束流横向剖面,为进一步提高系统测量的准确度,本工作提出了一种利用简化快速行进算法(Fast Matching Method,FMM)填充荧光靶标定线的方法,使填充后的荧光靶图像更真实地反映束流剖面信息。首先利用Matlab生...加速器中利用荧光靶系统测量束流横向剖面,为进一步提高系统测量的准确度,本工作提出了一种利用简化快速行进算法(Fast Matching Method,FMM)填充荧光靶标定线的方法,使填充后的荧光靶图像更真实地反映束流剖面信息。首先利用Matlab生成模拟荧光靶图像,对比分析了算法处理前后的模拟图像束流剖面参数。仿真结果表明,经过处理后的模拟图像,其结构相似性(Structural Similarity Index Measure,SSIM)更接近1,均方误差(Mean Square Error,MSE)更小。最后,利用医用重离子加速器(Heavy Ion Medical Machine,HIMM)现场采集的荧光靶图像进行验证。结果表明,HIMM现场采集的图像经处理后,剖面测量结果接近评估值。本研究结果为后续束流横向剖面参数算法在可编程逻辑阵列上进行算法加速提供了依据。展开更多
In this article, the fast multipole method （FMM） is applied to analgze the field strength of an ultra-wideband （UWB） signal. Small coverage of UWB communication systems and high efficiency of the algorithm make it...In this article, the fast multipole method （FMM） is applied to analgze the field strength of an ultra-wideband （UWB） signal. Small coverage of UWB communication systems and high efficiency of the algorithm make it possible to calculate the amplitude of electric field accurately. A homogeneous dielectric body and a multilayered dielectric object are studied. The computational results obtained by applying the FMM agree well with those obtained by applying the method of moments （MoM）.展开更多
文摘加速器中利用荧光靶系统测量束流横向剖面,为进一步提高系统测量的准确度,本工作提出了一种利用简化快速行进算法(Fast Matching Method,FMM)填充荧光靶标定线的方法,使填充后的荧光靶图像更真实地反映束流剖面信息。首先利用Matlab生成模拟荧光靶图像,对比分析了算法处理前后的模拟图像束流剖面参数。仿真结果表明,经过处理后的模拟图像,其结构相似性(Structural Similarity Index Measure,SSIM)更接近1,均方误差(Mean Square Error,MSE)更小。最后,利用医用重离子加速器(Heavy Ion Medical Machine,HIMM)现场采集的荧光靶图像进行验证。结果表明,HIMM现场采集的图像经处理后,剖面测量结果接近评估值。本研究结果为后续束流横向剖面参数算法在可编程逻辑阵列上进行算法加速提供了依据。
文摘In this article, the fast multipole method （FMM） is applied to analgze the field strength of an ultra-wideband （UWB） signal. Small coverage of UWB communication systems and high efficiency of the algorithm make it possible to calculate the amplitude of electric field accurately. A homogeneous dielectric body and a multilayered dielectric object are studied. The computational results obtained by applying the FMM agree well with those obtained by applying the method of moments （MoM）.
