洋葱路由(Tor, the onion route)网络加密流的关联分析是其追踪溯源的核心技术之一;针对当前基于深度学习的流关联方法存在的时间特征不可靠且初级特征表征能力不强的问题,提出了一种基于时频分析和图卷积神经网络的关联分析方法,该方...洋葱路由(Tor, the onion route)网络加密流的关联分析是其追踪溯源的核心技术之一;针对当前基于深度学习的流关联方法存在的时间特征不可靠且初级特征表征能力不强的问题,提出了一种基于时频分析和图卷积神经网络的关联分析方法,该方法使用Tor网络流量的数据包长度信息作为原始特征序列,将数据包的包长度序列通过时频分布函数映射到时频域,并进一步将其嵌入为图结构数据,同时使用图卷积神经网络提取高阶特征,最后将得到的高阶特征输入三元组网络以实现相似流量的关联。实验结果表明误报率为0.1%时,所提方法的关联准确率可达到83.4%,明显优于已有的DeepCorr和Attcorr方法。展开更多
The Large High Altitude Air Shower Observatory(LHAASO),a major project as part of China’s national scientific and technological infrastructure,passed the national acceptance assessment and formally went into operatio...The Large High Altitude Air Shower Observatory(LHAASO),a major project as part of China’s national scientific and technological infrastructure,passed the national acceptance assessment and formally went into operation on May 10.Dedicated to cosmic ray observation and research,the design of LHAASO was approved by the national authorities on December 31,2015.Jointly sponsored by the Chinese Academy of Sciences(CAS)and the People’s Government of Sichuan Province,the construction of the principal part of the facility began in 2017 and was completed in 2021.展开更多
文摘洋葱路由(Tor, the onion route)网络加密流的关联分析是其追踪溯源的核心技术之一;针对当前基于深度学习的流关联方法存在的时间特征不可靠且初级特征表征能力不强的问题,提出了一种基于时频分析和图卷积神经网络的关联分析方法,该方法使用Tor网络流量的数据包长度信息作为原始特征序列,将数据包的包长度序列通过时频分布函数映射到时频域,并进一步将其嵌入为图结构数据,同时使用图卷积神经网络提取高阶特征,最后将得到的高阶特征输入三元组网络以实现相似流量的关联。实验结果表明误报率为0.1%时,所提方法的关联准确率可达到83.4%,明显优于已有的DeepCorr和Attcorr方法。
文摘The Large High Altitude Air Shower Observatory(LHAASO),a major project as part of China’s national scientific and technological infrastructure,passed the national acceptance assessment and formally went into operation on May 10.Dedicated to cosmic ray observation and research,the design of LHAASO was approved by the national authorities on December 31,2015.Jointly sponsored by the Chinese Academy of Sciences(CAS)and the People’s Government of Sichuan Province,the construction of the principal part of the facility began in 2017 and was completed in 2021.