安全编排、自动化与响应(Security Orchestration,Automation and SOAR)网络安全应急响应案例库建成后,当新的安全事件产生时,对相似案例进行检索,得到的案例的响应方案往往还需要经过案例修正才能运用至实际环境中。研究了SOAR网络安...安全编排、自动化与响应(Security Orchestration,Automation and SOAR)网络安全应急响应案例库建成后,当新的安全事件产生时,对相似案例进行检索,得到的案例的响应方案往往还需要经过案例修正才能运用至实际环境中。研究了SOAR网络安全应急响应案例的修正方法,提出一种基于双线规则学习的案例修正技术;并对案例修正规则学习过程中的相似案例相似性度量方法进行了研究,提出了一种基于可达矩阵的流程图相似度计算方法;然后对案例修正过程进行了描绘;最后,对提出的案例修正技术进行了实验和分析。结果表明,提出的双线规则学习模式能够用于实际安全事件的应急响应。展开更多
发生脑卒中是中老年人群的常见和多发的疾病,且具有发病比较高、致残比例高和出现死亡比例高等特点,SOAR(stroke subtype, oxfordshire community stroke project classification, age and prestroke modified rankin, mSOAR)评价得分...发生脑卒中是中老年人群的常见和多发的疾病,且具有发病比较高、致残比例高和出现死亡比例高等特点,SOAR(stroke subtype, oxfordshire community stroke project classification, age and prestroke modified rankin, mSOAR)评价得分对于国内发生急性发作的缺血性卒中(acute ischemic stroke,AIS)病人出现的不良预后风险得有着较好的预测价值。在工作中,通过总结分析AIS病人资料有关情况,登记病人年龄、牛津郡社区卒中项目(oxfordshire community stroke project,OCSP)分类别、卒中之前的改进型Rankin统计量表(modified rankin scale,mRS)评分,美国国家卫生研究院关于卒中量表(national Institutes of health stroke scale,NIHSS)评价得分等相关统计计算信息,在入院时以mSOAR统计量表开展评价得分。所有病人在出院时通过mRS工具进行评价得分,在出院时发生的死亡或重残表示为不良预后。mSOAR评价得分预判病人在出院时发生的不良预后等潜在风险的病人工作特点(receiver operating characteristic curve,ROC)的在坐标图中曲线下的所占面积范围(area under curve,AUC)的数值,mSOAR的评价表在预判AIS病人出院时出现不良预后的风险预测水平相对较高。展开更多
Dynamic soaring is a flight maneuver to exploit gradient wind field to extend endurance and traveling distance.Optimal trajectories for permissible wind conditions are generated for loitering dynamic soaring as well a...Dynamic soaring is a flight maneuver to exploit gradient wind field to extend endurance and traveling distance.Optimal trajectories for permissible wind conditions are generated for loitering dynamic soaring as well as for traveling patterns with a small unmanned aerial vehicle.The efficient direct collection approach based on the Runge-Kutta integrator is used to solve the optimization problem.The fast convergence of the optimization process leads to the potential for real-time applications.Based on the results of trajectory optimizations,the general permissible wind conditions which involve the allowable power law exponents and feasible reference wind strengths supporting dynamic soaring are proposed.Increasing the smallest allowable wingtip clearance to trade for robustness and safety of the vehicle system and improving the maximum traveling speed results in shrunken permissible domain of wind conditions for loitering and traveling dynamic soaring respectively.Sensitivity analyses of vehicle model parameters show that properly reducing the wingspan and increasing the maximum lift-to-drag ratio and the wing loading can enlarge the permissible domain.Permissible domains for different traveling directions show that the downwind dynamic soaring benefitting from the drift is more efficient than the upwind traveling pattern in terms of permissible domain size and net traveling speed.展开更多
文摘安全编排、自动化与响应(Security Orchestration,Automation and SOAR)网络安全应急响应案例库建成后,当新的安全事件产生时,对相似案例进行检索,得到的案例的响应方案往往还需要经过案例修正才能运用至实际环境中。研究了SOAR网络安全应急响应案例的修正方法,提出一种基于双线规则学习的案例修正技术;并对案例修正规则学习过程中的相似案例相似性度量方法进行了研究,提出了一种基于可达矩阵的流程图相似度计算方法;然后对案例修正过程进行了描绘;最后,对提出的案例修正技术进行了实验和分析。结果表明,提出的双线规则学习模式能够用于实际安全事件的应急响应。
文摘发生脑卒中是中老年人群的常见和多发的疾病,且具有发病比较高、致残比例高和出现死亡比例高等特点,SOAR(stroke subtype, oxfordshire community stroke project classification, age and prestroke modified rankin, mSOAR)评价得分对于国内发生急性发作的缺血性卒中(acute ischemic stroke,AIS)病人出现的不良预后风险得有着较好的预测价值。在工作中,通过总结分析AIS病人资料有关情况,登记病人年龄、牛津郡社区卒中项目(oxfordshire community stroke project,OCSP)分类别、卒中之前的改进型Rankin统计量表(modified rankin scale,mRS)评分,美国国家卫生研究院关于卒中量表(national Institutes of health stroke scale,NIHSS)评价得分等相关统计计算信息,在入院时以mSOAR统计量表开展评价得分。所有病人在出院时通过mRS工具进行评价得分,在出院时发生的死亡或重残表示为不良预后。mSOAR评价得分预判病人在出院时发生的不良预后等潜在风险的病人工作特点(receiver operating characteristic curve,ROC)的在坐标图中曲线下的所占面积范围(area under curve,AUC)的数值,mSOAR的评价表在预判AIS病人出院时出现不良预后的风险预测水平相对较高。
文摘Dynamic soaring is a flight maneuver to exploit gradient wind field to extend endurance and traveling distance.Optimal trajectories for permissible wind conditions are generated for loitering dynamic soaring as well as for traveling patterns with a small unmanned aerial vehicle.The efficient direct collection approach based on the Runge-Kutta integrator is used to solve the optimization problem.The fast convergence of the optimization process leads to the potential for real-time applications.Based on the results of trajectory optimizations,the general permissible wind conditions which involve the allowable power law exponents and feasible reference wind strengths supporting dynamic soaring are proposed.Increasing the smallest allowable wingtip clearance to trade for robustness and safety of the vehicle system and improving the maximum traveling speed results in shrunken permissible domain of wind conditions for loitering and traveling dynamic soaring respectively.Sensitivity analyses of vehicle model parameters show that properly reducing the wingspan and increasing the maximum lift-to-drag ratio and the wing loading can enlarge the permissible domain.Permissible domains for different traveling directions show that the downwind dynamic soaring benefitting from the drift is more efficient than the upwind traveling pattern in terms of permissible domain size and net traveling speed.
