section spectrum analysis 局部频谱分析
This paper studies the type, density, frequency and filling of fractures in the reservoirs through core observation and microscopic thin section analysis.
为此，通过岩心观察和显微镜下薄片鉴定，研究了裂缝的发育类型、发育密度、发育频率以及充填特征。
River section analysis is the foundation of riverbed evolution analysis.
河道断面分析是河床演变分析的基础。
A nonlinear finite element method analysis is conducted that corroborates the results from the experimental study and inelastic section analysis.
用弹塑性截面分析法、非线性有限元法计算了梁的承载力与挠度，理论计算值与试验值吻合良好。
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