Use them for structural damage signals characteristic extraction, and signal extraction as neural network input, the introduction of three-tier network model BP damage to structures identification.

利用它们对结构损伤信号进行特征提取，并将提取的信号作为神经网络的输入，采用三层BP网络模型对结构物的损伤进行识别。

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And then design a common core layer, convergence layer and access layer of the three-tier network architecture model, while applications for network scalability give some solutions.

然后设计了常用的核心层、汇聚层和接入层组成的三层网络架构模型，同时对于网络应用的可扩展性给出一些解决方案。

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