This paper discusses the problem of choosing optical cable route with branch and bound way and puts forward the model of planning route in Layered network.

本文利用分枝限界法解决了自愈环光缆路由的选择问题，提出了分层网络光缆路由规划的数学模型。

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What's more, the series trades on a formula that has played well with cable audiences: layered characters that are neither entirely good nor pure evil.

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