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Transport networks, such as railway networks and airport networks, are a kind of random network with complex topology. Recently, more and more scholars paid attention to various kinds of transport networks and try to explore their inherent characteristics. Here we study the exponential properties of a recently introduced Bus Transport Networks (BTNs) evolution model with random overlapping clique structure, which gives a possible explanation for the observed exponential distribution of the connectivities of some BTNs of three major cities in China. Applying mean-field theory, we analyze the BTNs model and prove that this model has the character of exponential distribution of the connectivities, and develop a method to predict the growth dynamics of the individual vertices, and use this to calculate analytically the connectivity distribution and the exponents. By comparing mean-field based theoretic results with the statistical data of real BTNs, we observe that, as a whole, both of their data show similar character of exponential distribution of the connectivities, and their exponents have same order of magnitude, which show the availability of the analytical result of this paper. 相似文献
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测量高定量纸张水分的红外光学系统 总被引:2,自引:0,他引:2
中低定量纸张的水分测量多数应用红外光谱测量方法。本文提出一种可满足定量较高的厚纸水分测量的红外光学系统,使水分红外测量范围大大提高。 相似文献
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基于小波包分解的非线性时变系统辩识 总被引:2,自引:0,他引:2
在实际应用中,经常会碰到非线性时变系统,它们的辨识和建模比较困难.本文采用时变Hammerstein模型描述时变非线性系统.该模型可以以较简单的方式刻划系统的时变特性和非线性特性.然后用小波包对时变系数进行展开,把时变系统的辨识转化为对时不变系数的辨识. 相似文献
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参数不确定系统鲁棒H∞保代价滤波器设计新方法 总被引:1,自引:0,他引:1
提出参数不确定线性系统的鲁棒H(状态估计的新方法,并采用一种新的基于线性矩阵不等式(LMI)的设计方法得到问题的解.数值例子计算表明,该滤波器具有良好性能. 相似文献
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基于LMI方法的参数不确定多传感器系统的集中式融合估计 总被引:2,自引:0,他引:2
研究了范数有界不确定描述模型和多胞形不确定描述模型所代表的一类参数不确定多传感器系统的集中融合估计问题。应用H∞理论详细地比较了基于不同模型的两种融合方法时域和频域功能,给出了集中鲁棒融合估计的理论结果。并应用MATLAB的LMI工具箱,分析了仿真计算结果。 相似文献
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