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Graph-Theoretic Approach to Network Analysis
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作者 Nabil Hassan 《Computer Technology and Application》 2013年第12期625-634,共10页
Networks are a class of general systems represented by becomes a weighted graph visualizing the constraints imposed their UC-structure. Suppressing the nature of elements the network by interconnections rather than th... Networks are a class of general systems represented by becomes a weighted graph visualizing the constraints imposed their UC-structure. Suppressing the nature of elements the network by interconnections rather than the elements themselves. These constraints follow generalized Kirchhoff's laws derived from physical constraints. Once we have a graph; then the working environment becomes the graph-theory. An algorithm derived from graph theory is developed within the paper in order to analyze general networks. The algorithm is based on computing all the spanning trees in the graph G with an associated weight. This weight is the product ofadmittance's of the edges forming the spanning tree. In the first phase this algorithm computes a depth first spanning tree together with its cotree. Both are used as parents for controlled generation of off-springs. The control is represented in selecting the off-springs that were not generated previously. While the generation of off-springs, is based on replacement of one or more tree edges by cycle edges corresponding to cotree edges. The algorithm can generate a frequency domain analysis of the network. 展开更多
关键词 UC-structure NETWORK spanning tree depth-first search spanning trees generation algorithm.
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“大熊猫”绿化树
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作者 沈逸文 《小学生导刊(中年级版)》 2019年第3期87-87,共1页
我看到街道边银杏树的身影随处可见。为什么银杏树在城市绿化带中越来越多了呢?首先是因为它非常美。秋姑娘轻轻地吹拂着银杏树叶,叶子像一把把金黄色的小扇子在空中起舞。而粗壮挺拔的树干,像部队中的军人,严肃威武。银杏树不像其他绿... 我看到街道边银杏树的身影随处可见。为什么银杏树在城市绿化带中越来越多了呢?首先是因为它非常美。秋姑娘轻轻地吹拂着银杏树叶,叶子像一把把金黄色的小扇子在空中起舞。而粗壮挺拔的树干,像部队中的军人,严肃威武。银杏树不像其他绿化树般色彩单调。春天,它青翠的容颜可以和新绽的柳芽媲美。秋天,满树的金黄胜过火红的枫叶。 展开更多
关键词 单调 色彩 新绽 枫叶 绿化带 绿化 部队 树般
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