This paper proposes a novel phishing web image segmentation algorithm which based on improving spectral clustering.Firstly,we construct a set of points which are composed of spatial location pixels and gray levels fro...This paper proposes a novel phishing web image segmentation algorithm which based on improving spectral clustering.Firstly,we construct a set of points which are composed of spatial location pixels and gray levels from a given image.Secondly,the data is clustered in spectral space of the similar matrix of the set points,in order to avoid the drawbacks of K-means algorithm in the conventional spectral clustering method that is sensitive to initial clustering centroids and convergence to local optimal solution,we introduce the clone operator,Cauthy mutation to enlarge the scale of clustering centers,quantum-inspired evolutionary algorithm to find the global optimal clustering centroids.Compared with phishing web image segmentation based on K-means,experimental results show that the segmentation performance of our method gains much improvement.Moreover,our method can convergence to global optimal solution and is better in accuracy of phishing web segmentation.展开更多
为满足无线体域网(wireless body area network,WBAN)应用中对超宽带天线的陷波要求,采用在槽孔型的辐射贴片上添加十字型枝节谐振器的方法优化设计了一款超宽带陷波天线。天线使用共面波导方式馈电,使天线获得较宽的带宽。通过嵌入十...为满足无线体域网(wireless body area network,WBAN)应用中对超宽带天线的陷波要求,采用在槽孔型的辐射贴片上添加十字型枝节谐振器的方法优化设计了一款超宽带陷波天线。天线使用共面波导方式馈电,使天线获得较宽的带宽。通过嵌入十字型枝节谐振器调谐天线的阻抗,实现陷波特性。通过仿真分析确定谐振器横、竖枝节的尺寸范围。利用量子进化算法对谐振器的横、竖尺寸进行优化,获取使天线的陷波频带达到最佳要求的谐振器尺寸参数。根据优化结果制作实物天线,天线的带宽为3.4-9.9 GHz,陷波频段为5.2-5.8 GHz。由天线回波损耗及方向图的仿真和测试结果表明,该优化设计方法是有效的。展开更多
基金Supported by the Fundamental Research Funds for the Central Universities in North China Electric Power University(11MG13)the Natural Science Foundation of Hebei Province(F2011502038)
文摘This paper proposes a novel phishing web image segmentation algorithm which based on improving spectral clustering.Firstly,we construct a set of points which are composed of spatial location pixels and gray levels from a given image.Secondly,the data is clustered in spectral space of the similar matrix of the set points,in order to avoid the drawbacks of K-means algorithm in the conventional spectral clustering method that is sensitive to initial clustering centroids and convergence to local optimal solution,we introduce the clone operator,Cauthy mutation to enlarge the scale of clustering centers,quantum-inspired evolutionary algorithm to find the global optimal clustering centroids.Compared with phishing web image segmentation based on K-means,experimental results show that the segmentation performance of our method gains much improvement.Moreover,our method can convergence to global optimal solution and is better in accuracy of phishing web segmentation.
文摘为满足无线体域网(wireless body area network,WBAN)应用中对超宽带天线的陷波要求,采用在槽孔型的辐射贴片上添加十字型枝节谐振器的方法优化设计了一款超宽带陷波天线。天线使用共面波导方式馈电,使天线获得较宽的带宽。通过嵌入十字型枝节谐振器调谐天线的阻抗,实现陷波特性。通过仿真分析确定谐振器横、竖枝节的尺寸范围。利用量子进化算法对谐振器的横、竖尺寸进行优化,获取使天线的陷波频带达到最佳要求的谐振器尺寸参数。根据优化结果制作实物天线,天线的带宽为3.4-9.9 GHz,陷波频段为5.2-5.8 GHz。由天线回波损耗及方向图的仿真和测试结果表明,该优化设计方法是有效的。
