当样本量较大时，QIF方法表明工作相关阵的选择等价于无偏估计方程的选择。
When the sample size is great, QIF approach shows that the selection of working correlation is same to the selection of unbiased estimating equation.
本文引进了完全强连通方向图的概念，利用邻接阵给出了等价表征。
In this paper, we introduce the concept of full strongly connected directed graph, give some characterizations of this graph.
本文引进了完全强连通方向图的概念，利用邻接阵给出了等价表征。
In this paper, we introduce the concept of full strongly connected directed graph, give some characterizations of this graph.
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