使静态路由文件与拓扑结构修改保持同步。

Keep the static routing file in sync with topology changes.

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该算法利用网络中所有节点的局部信息保持网络的连通性，同时，利用最短路径算法计算链接权值的大小来进行拓扑结构的调整。

The algorithm maintains network connectivity only based on locally collected information and adjusts the topology structure according to the shortest-path algorithm by calculating the link weight.

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为了避免结果奇异，在优化过程中，给被删去的构件一个微小的截面积，使一个给定的拓扑组的结构维数保持不变。

In order to avoid a singular solution, we keep the dimension of the truss for a given topology unchanged by giving the truss member to be removed a tiny cross-sectional area.

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