upward trend analysis 向上趋势分析
Methods: The statistical analysis method includes descriptive statistics, dynamic series and test for upward or downward trend, correlation analysis.
方法：运用统计描述、动态数列和升降趋势检验、相关分析。
The analysis method in frequency domain is adopted to treat the transversely isotropic multi-layered soils, and response of soil layers under the upward shear waves is obtained.
采用频域分析方法，对多层横观各向同性土层对垂直向上的入射剪切波的反应进行了分析。
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