The lack of data on air quality monitoring and neglected and overlooked pollutant emissions in the transportation and industrial sectors are motives for the gov
针对目前P2P分发网中本地数据命中率低和中心目录服务器(Directory Server)压力过大的问题,提出了基于多超级节点的PMDN(P2P-Media Distribution Network)搜索策略MSS(Multi-Super-Peer Search),与传统的资源搜索策略相比,其不需频繁地查询中心服务器,且能充分考虑临近资源,因而系统服务质量得以大大提高。实验结果表明MSS策略与传统