The wave-particle duality relation derived by Englert sets an upper bound of the extractable information from wave and particle properties in a two-path interferometer.Surprisingly,previous studies demonstrated that t...The wave-particle duality relation derived by Englert sets an upper bound of the extractable information from wave and particle properties in a two-path interferometer.Surprisingly,previous studies demonstrated that the introduction of a quantum beamsplitter in the interferometer could break the limitation of this upper bound,due to interference between wave and particle states.Along the other line,a lot of efforts have been made to generalize this relation from the two-path setup to the N-path case.Thus,it is an interesting question that whether a quantum N-path beamsplitter can break the limitation as well.This paper systemically studies the model of a quantum N-path beamsplitter,and finds that the generalized wave-particle duality relation between interference visibility and path distinguishability is also broken in certain situations.We further study the maximal extractable information's reliance on the interference between wave and particle properties,and derive a quantitative description.We then propose an experimental methodology to verify the break of the limitation.Our work reflects the effect of quantum superposition on wave-particle duality,and exhibits a new aspect of the relation between visibility and path distinguishability in N-path interference.Moreover,it implies the observer's influence on wave-particle duality.展开更多
评估馈线供电能力是保障馈线可靠运行的重要手段。文中提出了一种基于路径描述的馈线分区N-1可装容量计算方法。首先,将同一电压等级配电网以自动/手动开关装置为边界划分馈线分区,视为负荷节点;采用所有负荷节点及其所有可能供电路径...评估馈线供电能力是保障馈线可靠运行的重要手段。文中提出了一种基于路径描述的馈线分区N-1可装容量计算方法。首先,将同一电压等级配电网以自动/手动开关装置为边界划分馈线分区,视为负荷节点;采用所有负荷节点及其所有可能供电路径的集合描述配电网拓扑结构。随后,以路径状态为变量,建立了馈线N-1安全校验的0-1线性规划模型。针对电网营销部门的实际数据需求,以路径状态和馈线分区可装容量为变量,进一步建立了用于馈线分区N-1可装容量计算的混合整数线性规划模型。最后,以某省会城市实际运行的某一10 k V馈线组为例,验证了所提算法的实用性和有效性。展开更多
n-gram能有效识别字符串的序列特征,基于n-gram技术计算的软件胎记可信性普遍较高。但n-gram更适用于文本程序,对两个软件的动态特征区分不理想,很难不被保持语义变换操作所干扰,胎记可靠性难以保证。文章利用影响分析技术,找出频繁执...n-gram能有效识别字符串的序列特征,基于n-gram技术计算的软件胎记可信性普遍较高。但n-gram更适用于文本程序,对两个软件的动态特征区分不理想,很难不被保持语义变换操作所干扰,胎记可靠性难以保证。文章利用影响分析技术,找出频繁执行路径上的关联代码,形成扩展执行路径,在扩展频繁执行路径上计算n-gram后构造动态胎记。该胎记抗保持语义变换能力不低于WPP(Whole Program Path)胎记,用于指令流时胎记的可信性更好。展开更多
基金the National Natural Science Foundation of China(Grant No.61632021).
文摘The wave-particle duality relation derived by Englert sets an upper bound of the extractable information from wave and particle properties in a two-path interferometer.Surprisingly,previous studies demonstrated that the introduction of a quantum beamsplitter in the interferometer could break the limitation of this upper bound,due to interference between wave and particle states.Along the other line,a lot of efforts have been made to generalize this relation from the two-path setup to the N-path case.Thus,it is an interesting question that whether a quantum N-path beamsplitter can break the limitation as well.This paper systemically studies the model of a quantum N-path beamsplitter,and finds that the generalized wave-particle duality relation between interference visibility and path distinguishability is also broken in certain situations.We further study the maximal extractable information's reliance on the interference between wave and particle properties,and derive a quantitative description.We then propose an experimental methodology to verify the break of the limitation.Our work reflects the effect of quantum superposition on wave-particle duality,and exhibits a new aspect of the relation between visibility and path distinguishability in N-path interference.Moreover,it implies the observer's influence on wave-particle duality.
文摘评估馈线供电能力是保障馈线可靠运行的重要手段。文中提出了一种基于路径描述的馈线分区N-1可装容量计算方法。首先,将同一电压等级配电网以自动/手动开关装置为边界划分馈线分区,视为负荷节点;采用所有负荷节点及其所有可能供电路径的集合描述配电网拓扑结构。随后,以路径状态为变量,建立了馈线N-1安全校验的0-1线性规划模型。针对电网营销部门的实际数据需求,以路径状态和馈线分区可装容量为变量,进一步建立了用于馈线分区N-1可装容量计算的混合整数线性规划模型。最后,以某省会城市实际运行的某一10 k V馈线组为例,验证了所提算法的实用性和有效性。
文摘n-gram能有效识别字符串的序列特征,基于n-gram技术计算的软件胎记可信性普遍较高。但n-gram更适用于文本程序,对两个软件的动态特征区分不理想,很难不被保持语义变换操作所干扰,胎记可靠性难以保证。文章利用影响分析技术,找出频繁执行路径上的关联代码,形成扩展执行路径,在扩展频繁执行路径上计算n-gram后构造动态胎记。该胎记抗保持语义变换能力不低于WPP(Whole Program Path)胎记,用于指令流时胎记的可信性更好。
