The paper puts the emphasis on the signal de - noising and calculation time - difference for collected sound wave and vibration signals . at the same time , the wavelet transform is applied to embed and detect watermark . aiming at various signals de - noising , various wavelet transform methods are applied : ( l ) de - nosing the higher snr signals collected on the earth , comparing the wavelet transform thresholding with the horizontal motion invariable wavelet transform , the paper concludes that the latter is more fitter to de - noise the kind of signals ; ( 2 ) de - noising the lower snr signals collected in the water , the paper uses the wavelet transform power spectrum to de - noise the signals and achieves the better results 针对不同信号的去噪，运用了不同的小波去噪方法： ( 1 )对于陆地上采集的较高信噪比信号的去噪，本论文通过两种去噪方法? ?小波变换阈值法和平移不变量小波去噪的比较，得出了平移不变量小波去噪效果更好的结论； ( 2 )对于水中采集的低信噪比信号的去噪，本论文运用了小波变换功率谱计算的去噪手段，得到了较好的结果。
The three level fortification criterion and two stage design method and the elastic response spectrum theory are adopted , and the program of nba ( the program of nonlinear - aseismic analysis for beam bridge ) is used to calculate . a lot of bridge design materials are gathered , through analyzing and calculating , the bridge and the lrb are related by the intrinsic period 本论文采用三水准设防、两阶段设计方法、弹性反应谱计算理论，采用桥梁结构非线性地震响应分析程序nba ( theprogramofnonlinear ? aseismicanalysisforbeambridge )进行计算；通过收集大量的实桥设计资料，经分析计算，通过周期将桥梁与铅销橡胶支座联系起来。
