Efficient and reliable subcarrier power joint allocation is served as a promising problem in cognitive OFDM-based Cognit......

为了探究农业生产实践中经过人工夯实的田坎在自然营力作用下的垮塌变形机理,通过采集黄土区梯田土壤,对其进行室内击实、模拟干湿......