The pdf is a thesis on dynamic spectrum access related to cognitive radios.

Priority based dynamic spectrum access with QoS and interference temperature constraints2.基于QOS级别和干扰温度的认知无线电频谱动态分配研究-Priority based dynamic spectrum access with QoS and interference temperature constraints2

Priority based dynamic spectrum access with QoS and interference temperature constraint》.郑海涛的论文，认知无线电频谱管理分配研究，大牛哦-Priority based dynamic spectrum access with QoS and interference temperature constraint " . Haitao papers, radio spectrum management