Application of Power Spectral Methods to Improve the Site Effect Estimation

• Main Authors: Ming-Chi Kuan, 關名吉
• Other Authors: Ming-Shi Wang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/37602668503256249899

碩士 === 國立成功大學 === 工程科學系碩博士班 === 93 === Periodogram is a common method used to estimate the site effect of micro-earthquake. Due to the captured vibration signal is noisy,it is needed to exclude those interfered signal. This procedure is subjective and time consumed. The purpose of the measurement of micro-earthquake is to obtain the power spectrum densities of different frequency components of the vibration. In this study, nine different techniques used to estimate the site effect are studied and compared their results. There are Periodogram, Welch, Multitaper, Yule-Walker, Burg, Covariance, Modified Covariance, MUSIC, and Eigenvector techniques. The power spectrum densities obtained from these different techniques are compared to find the similarity. Three sites are selected for the experiment. It is shown that to combine the results obtained from Periodogram, Welch, and Yule-Walker techniques can improve the efficiency for the estimation.