网络层的链路带宽与有效带宽直接反映了端到端路径的基本状况，是对网络进行性能管理和服务质量控制的基础。
In network layer link bandwidth and available bandwidth capture the relevant properties of network path, which is baseline of performance management and QoS control.
层间增韧的几何效应、裂纹传播路径控制、裂尖屏蔽和颗粒桥联是主要的增韧机理。
Geometrical effect, crack path kinking and deflection, particle bridging and crack shielding are the main toughening mechanisms.
针对室内移动机器人导航问题，提出一种包括全局规划层、局部路径优化层、反应式导航控制层的导航策略。
A strategy based on global planning layer, local path optimizing layer and reactive navigation controlling layer is presented for indoor mobile robot navigation.
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