Results:The tumors showed as a thickness or bulky mass of the local supraglottic structure with irregular margin, homogeneous attenuation and slight enhancement.
结果：肿瘤呈局部软组织增厚或团块状肿块，形态不规则，密度较均匀，增强后轻度强化；
2
Furthermore, with the method of amplitude ratio with different frequency selected, the areal attenuation effect and local site response have been studied.
采用振幅谱频率比方法，研究区域衰减效应和局部场地响应。
3
The whole-spacecraft vibration isolation technology and the spacecraft local vibration attenuation can improve the dynamic environment of the spacecraft.