【摘要】 针对联合迭代重建技术(simultaneous iterative reconstruction technique,SIRT)应用于近地表层析成像时,由于系数矩阵A与旅行时残差Δt不完全匹配而易出现修正过度的问题,本文提出一种改进的SIRT算法.用炮点与检波点的距离d修正约束旅行时残差Δt,改进了A与Δt的匹配性较差的问题.验算结果表明:该算法能够有效地抑制修正过度现象,而得到较好的重建图像.更多还原

【Abstract】 When simultaneous iterative reconstruction technique(SIRT) was applied in the near-surfacing structure,there was the problem of over-adapting in it.It was because that coefficient metrice A was not fit for the travel time Δt.The paper analyzed the limitation of SIRT and presented an improved method to weigh the travel time residual by the distance d from the source to the receiver.The calculating results showed that the method could solve the shortage and get better reconstruction images.更多还原