critical correlation coefficient
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另外一个方面是利用股价走势间的相关系数构建了我国证券市场的自组织临界拓扑位形，得出上海市场的平均拓扑度为2.2011，深圳市场的平均拓扑度为2.1872。
We find that Shanghai Market's average topological number is 2.2011 while Shenzhen Market is 2.1872. The result shows that Chinses Stock Market did have the characteristic of SOC.
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