A new method is proposed to reduce the peak-to-average power ratio of orthogonal frequency division multiplexing system.
提出了一种新的降低正交频分复用系统峰均功率比的方法。
2
In the meantime, fracture developing frequency of Fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity - "crocodile factor" method.
同时，运用纵波波速的比值——“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。
3
Based on element local frequency change ratiomethod and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.