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。
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。
The access layer, which is the lowest level of the Cisco three tier network model, eures that packets are delivered to end user devices.
访问层，这是思科的最低水平三层网络模型，欧元，数据包交付给最终用户设备。
The access layer, which is the lowest level of the Cisco three tier network model, eures that packets are delivered to end user devices.
访问层，这是思科的最低水平三层网络模型，欧元，数据包交付给最终用户设备。
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