经典的频谱共享的EI检索算法，运用动态频谱租用来提高频谱利用率。-Dynamic Spectrum Leasing (DSL) is a new paradigm for efficient spectrum sharing in cognitive radio networks that was recently proposed in [1]–[3]. Unlike in a hierarchical dynamic spectrum access (DSA) network,

几篇外文EI文献，主要是关于基于三维点云数据的物体形貌的三维可视化-A few article foreign EI literature, mainly is about based on 3 d point clouds data objects morphology of the 3d visualization