通过计算待评价对象与各聚类中心的距离，实现对其分类和方案的评价。
The classification and evaluation are realized by calculating the distance of the object and the cluster center.
首先，本文阐述了基本的车间布局理论与技术，包括车间布局问题的定义，车间布局的要素、原则与分类，布局方案的评价方法。
First, the basic theories and technologies of plant layout will be narrated, including the definitions, elements, principles, classifications and the method used to estimate a plant layout solution.
最后提出一种基于分层和分类策略的MPLSVPN生存性方案，从恢复时间和资源利用率两方面给出了性能评价。
In the end, a MPLS VPN survivability mechanism which based on the policies of hierarchy and flow type is proposed, performance estimation is presented in recovery time and resource utilization.
最后提出一种基于分层和分类策略的MPLSVPN生存性方案，从恢复时间和资源利用率两方面给出了性能评价。
In the end, a MPLS VPN survivability mechanism which based on the policies of hierarchy and flow type is proposed, performance estimation is presented in recovery time and resource utilization.
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