This study addresses the public concerns of potential adverse health effects from ambient fine particulate matter as well as socioeconomic factors. Heart attack, high blood pressure, and heart disease mortality rates ...This study addresses the public concerns of potential adverse health effects from ambient fine particulate matter as well as socioeconomic factors. Heart attack, high blood pressure, and heart disease mortality rates were investigated against fine particulate matter and socioeconomic status, for all counties in the United States in 2013. Multivariate multiple regressions as well as multivariate geostatistical predictions show that these are significant factors towards assessing the causal inferences between exposure to air pollution and socioeconomic status and the three mortality rates.展开更多
低速率拒绝服务(LDoS,low-rate denial of service)攻击是一种降质服务(RoQ,reduction of quality)攻击,具有平均速率低和隐蔽性强的特点,它是云计算平台和大数据中心面临的最大安全威胁之一。提取了LDoS攻击流量的3个内在特征,建立基...低速率拒绝服务(LDoS,low-rate denial of service)攻击是一种降质服务(RoQ,reduction of quality)攻击,具有平均速率低和隐蔽性强的特点,它是云计算平台和大数据中心面临的最大安全威胁之一。提取了LDoS攻击流量的3个内在特征,建立基于BP神经网络的LDoS攻击分类器,提出了基于联合特征的LDoS攻击检测方法。该方法将LDoS攻击的3个内在特征组成联合特征作为BP神经网络的输入,通过预先设定的决策指标,达到检测LDoS攻击的目的。采用LDoS攻击流量专用产生工具,在NS2仿真平台和test-bed网络环境中对检测算法进行了测试与验证,实验结果表明通过假设检验得出检测率为96.68%。与现有研究成果比较说明基于联合特征的LDoS攻击检测性优于单个特征,并具有较高的计算效率。展开更多
文摘This study addresses the public concerns of potential adverse health effects from ambient fine particulate matter as well as socioeconomic factors. Heart attack, high blood pressure, and heart disease mortality rates were investigated against fine particulate matter and socioeconomic status, for all counties in the United States in 2013. Multivariate multiple regressions as well as multivariate geostatistical predictions show that these are significant factors towards assessing the causal inferences between exposure to air pollution and socioeconomic status and the three mortality rates.
文摘低速率拒绝服务(LDoS,low-rate denial of service)攻击是一种降质服务(RoQ,reduction of quality)攻击,具有平均速率低和隐蔽性强的特点,它是云计算平台和大数据中心面临的最大安全威胁之一。提取了LDoS攻击流量的3个内在特征,建立基于BP神经网络的LDoS攻击分类器,提出了基于联合特征的LDoS攻击检测方法。该方法将LDoS攻击的3个内在特征组成联合特征作为BP神经网络的输入,通过预先设定的决策指标,达到检测LDoS攻击的目的。采用LDoS攻击流量专用产生工具,在NS2仿真平台和test-bed网络环境中对检测算法进行了测试与验证,实验结果表明通过假设检验得出检测率为96.68%。与现有研究成果比较说明基于联合特征的LDoS攻击检测性优于单个特征,并具有较高的计算效率。
