surface n. 1.表面;地面;水面;广场,空地。 2.外观,外表,皮毛。 3.【几】面;切口;【航空】翼面。 adj. 表面的;地面的,水面的;外观的,外表上的;(对高架及地下铁路说的)平地上的;(对矿井内说的)矿井外的。 an adjusting surface 【航空】调节板。 a supporting surface 【航空】支持面积。 a plane surface 平面。 surfaces in contact =rubbing surfaces 摩擦面。 look at the surface only 只看外表。 One never gets below the surface with him. 人们无法看透他的内心。 a surface raider 海上突击舰。 look below [beneath] the surface of things 看到事物的内部。 of the surface 外观上的,表面的。 on the surface 表面上,外表上。 vt. 为…装面[配面],对…作表面处理;使成平面;掘开…的地面;铺(路面);使(潜艇)浮出水面。 vi. 地面采掘,井外劳动;浮出水面。
A new method based on the frequency decrease rate for fast identification of site liquefaction from surface acceleration records was presented 摘要提出了一个以频率下降率为基本指标的依据强震记录快速识别场地液化的新方法。
And then the lower limit of the frequency decrease rate was derived , and the last identification method of site liquefaction from surface acceleration records was proposed 基于强震记录快速识别场地液化的方法,并用实际地震记录对其可靠性进行了分析。
3 . for three kinds of different soil layer construction , the characters of the platform values and the characteristic periods of ground surface acceleration response spectra were studied 3系统地研究了软夹层在底部、中部和顶部的三种土层结构的反应谱平台值和特征周期的主要特征。
With the use of one - dimension equivalent - linear wave motion method which is wildly used at present in the analysis of earthquake site response , the platform values and the characteristic periods of ground surface acceleration response spectra of different profiles were calculated and analyzed under different ground motion inputs 利用目前工程上常用的一维等效线性化波动方法计算分析在不同地震动输入下,不同场地类别、三种土层结构的地表加速度反应谱的特征周期和平台值。