The results show that the medium term symptoms of strong earthquakes in some regions can be proposed from the multi fractal dimensionspectrum and singularity spectrum of earthquake distribution.
研究结果表明：地震分布的多重分形维数谱和奇异性谱对于一些典型震区的强震发生具有中期预报价值。
2
Through spectrum analysis, time-marching analysis and radom vibration analysis, the seismic performance of arch bridge under one-dimension and multi-dimension excitation has been analyzed.