准确高效地发现网络中有影响力的传播者具有非常重要的理论和现实意义。近年来,结点影响力排序受到了多领域学者的广泛关注。K-shell是一种较好的结点影响力评价指标;然而,仅仅依赖结点自身K-shell值实现的算法通常具有评估结果精确度...准确高效地发现网络中有影响力的传播者具有非常重要的理论和现实意义。近年来,结点影响力排序受到了多领域学者的广泛关注。K-shell是一种较好的结点影响力评价指标;然而,仅仅依赖结点自身K-shell值实现的算法通常具有评估结果精确度不高、适用性较差等缺陷。针对此问题,提出KSN(the K-shell and neighborhood centrality)中心性模型,该算法综合考虑了结点本身及其所有二阶以内邻居结点的K-shell值。实验结果表明,所提出算法度量结点传播的能力比度中心性、介数中心性、K-shell分解、混合度分解等方法更准确。展开更多
为了保证三废处理系统(KSN)在核电站的整个生命周期内安全可靠、稳定运行,需要对原有的继电器控制的三废处理系统进行改造,即采用基于计算机架构的数字化控制系统(Digital Control System,DCS)的设计替代原有的模拟继电器控制。首先研究...为了保证三废处理系统(KSN)在核电站的整个生命周期内安全可靠、稳定运行,需要对原有的继电器控制的三废处理系统进行改造,即采用基于计算机架构的数字化控制系统(Digital Control System,DCS)的设计替代原有的模拟继电器控制。首先研究了KSN数字化控制系统的总体架构,分析了KSN系统的功能及信号流,在此基础上,给出基于故障树分析的系统可靠性建模方法。通过该方法的使用及分析,给出了2种系统改进方案供设计人员参考。并从可靠性定量角度评估了系统设计。展开更多
Understanding the topography in active tectonic areas and assessing the rates and models of active deformation in the upper crust are primary objectives in tectonic geomorphology studies. The drainage pattern of river...Understanding the topography in active tectonic areas and assessing the rates and models of active deformation in the upper crust are primary objectives in tectonic geomorphology studies. The drainage pattern of river systems is highly sensitive to tectonically induced changes, and it often preserves the records of the formation and progression of most tectono-geomorphic processes within its boundaries. Therefore, the evolution of landforms is a consequence of the evolution of individual drainage basins in which they are formed. Assessing the rates of tectonic deformation using geomorphic data is a traditionally adopted method to characterize the nature of active faults. Globally, the Digital Elevation Model(DEM) is widely used as a crucial tool to analyze the morphotectonic features of drainage basins. In this study, some geomorphic indices were applied to investigate the impact of tectonism on landscape along the Karahay?t Fault and its associated drainage areas. These geomorphic indices are mountain front sinuosity(Smf values between 1.17-1.52), valley floor width-to-height ratio(Vf values between 0.25-1.46), basin asymmetry factor(AF values between 15-72), drainage basin shape(Bs values between 3.18-6.01), hypsometric integral and curve(HI values between 0.32-047), channel sinuosity(S values between 1-1.6), normalized steepness index(Ksn values between 1-390) and Chi integral(χ values between 200-4400). The development of drainage areas on the hanging wall and footwall block of the Karahayit Fault differs depending on the uplift. The drainage areas developed on the hanging wall present different patterns depending on the regional uplift caused by the fault. This reveals that the fault contributed significantly to the development of drainage areas and regional uplift in the region. In addition, the maximum earthquake magnitude that may occur in the future on the Karahayit Fault, whose activity is supported by geomorphic indices, is calculated as 6.23. Since an earthquake of this magnitude may cause loss of life and property in the region, precautions should be taken.展开更多
文摘准确高效地发现网络中有影响力的传播者具有非常重要的理论和现实意义。近年来,结点影响力排序受到了多领域学者的广泛关注。K-shell是一种较好的结点影响力评价指标;然而,仅仅依赖结点自身K-shell值实现的算法通常具有评估结果精确度不高、适用性较差等缺陷。针对此问题,提出KSN(the K-shell and neighborhood centrality)中心性模型,该算法综合考虑了结点本身及其所有二阶以内邻居结点的K-shell值。实验结果表明,所提出算法度量结点传播的能力比度中心性、介数中心性、K-shell分解、混合度分解等方法更准确。
文摘为了保证三废处理系统(KSN)在核电站的整个生命周期内安全可靠、稳定运行,需要对原有的继电器控制的三废处理系统进行改造,即采用基于计算机架构的数字化控制系统(Digital Control System,DCS)的设计替代原有的模拟继电器控制。首先研究了KSN数字化控制系统的总体架构,分析了KSN系统的功能及信号流,在此基础上,给出基于故障树分析的系统可靠性建模方法。通过该方法的使用及分析,给出了2种系统改进方案供设计人员参考。并从可靠性定量角度评估了系统设计。
文摘Understanding the topography in active tectonic areas and assessing the rates and models of active deformation in the upper crust are primary objectives in tectonic geomorphology studies. The drainage pattern of river systems is highly sensitive to tectonically induced changes, and it often preserves the records of the formation and progression of most tectono-geomorphic processes within its boundaries. Therefore, the evolution of landforms is a consequence of the evolution of individual drainage basins in which they are formed. Assessing the rates of tectonic deformation using geomorphic data is a traditionally adopted method to characterize the nature of active faults. Globally, the Digital Elevation Model(DEM) is widely used as a crucial tool to analyze the morphotectonic features of drainage basins. In this study, some geomorphic indices were applied to investigate the impact of tectonism on landscape along the Karahay?t Fault and its associated drainage areas. These geomorphic indices are mountain front sinuosity(Smf values between 1.17-1.52), valley floor width-to-height ratio(Vf values between 0.25-1.46), basin asymmetry factor(AF values between 15-72), drainage basin shape(Bs values between 3.18-6.01), hypsometric integral and curve(HI values between 0.32-047), channel sinuosity(S values between 1-1.6), normalized steepness index(Ksn values between 1-390) and Chi integral(χ values between 200-4400). The development of drainage areas on the hanging wall and footwall block of the Karahayit Fault differs depending on the uplift. The drainage areas developed on the hanging wall present different patterns depending on the regional uplift caused by the fault. This reveals that the fault contributed significantly to the development of drainage areas and regional uplift in the region. In addition, the maximum earthquake magnitude that may occur in the future on the Karahayit Fault, whose activity is supported by geomorphic indices, is calculated as 6.23. Since an earthquake of this magnitude may cause loss of life and property in the region, precautions should be taken.
