【摘 要】
：
A target in layered medium can be located by the ridge-like distribution time reversal and reverse time migration (TR-RTM) mixed method.However,this method cann
【机 构】
：
Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190“,”University of Chinese Academy
论文部分内容阅读
A target in layered medium can be located by the ridge-like distribution time reversal and reverse time migration (TR-RTM) mixed method.However,this method cannot distinguish between acoustic field distributions of the interface and target for the wider acoustic pulse signals,which may result in inaccurate location of the target.A snapshot TR-RTM mixed method is proposed to solve this problem.The principle of snapshot TR-RTM mixed method is first given.Experiments are then carried out,and a mountain-like acoustic field distribution is obtained by processing experimental data.The results show that the location of the peak is that of the target,and the ratio of the scattered signal and interface reflection signal (signal-to-interference ratio) is improved by about four times after processing.Furthermore,this method can effectively suppress the interface reflection signal and enhance the target scattering signal.Therefore,it can achieve effective detection and location of a target in a layered medium.
其他文献
4月11日从北京市科委获悉，由京津冀三地科技主管部门推动，整合70余家钢铁企业、节能减排机构、高校院所及金融机构的“钢铁行业节能减排产业技术创新联盟”正式成立，将推动钢铁
4月11日，部分地区铁路建设工作会议在重庆市召开，中共中央政治局常委、国务院总理李克强作出重要批示：“铁路是国民经济大动脉和关键基础设施，加快推进铁路建设．既利当前，又利长远，
石油焦目前广泛应用于高炉炼铁、金属制造及电炉冶金等行业中,尤其在炼铝行业中需要优质焦,其中铁、钙含量和不能高于300μg/g,这就需要严格控制石油焦中的灰分.文中对乌鲁木
We study the algebraic structure of the one-dimensional Dirac oscillator by extending the concept of spin symmetry to a noncommutative case.An SO(4) algebra is
李克强总理4月3日主持召开中国装备“走出去”和推进国际产能合作座谈会。他强调，要推动中国外贸从“大进大出”转向“优进优出”，形成开放型经济新格局。这将有利于培育对外开
Based on density functional theory calculations,it is found that for substitutional N in diamond the C3v symmetry structure is more stable,while C3v and D2d sym
We propose a scenario to increase the probability of probabilistic quantum deletion and to enhance the fidelity of approximate quantum deletion for two non-orth
Mn-based Heusler alloys have attracted significant research attention as half-metallic materials because of their giant magnetocrystalline anisotropy and magnet
近日，国家发展改革委、财政部和水利部联合出台《关于鼓励和引导社会资本参与重大水利工程建设运营的实施意见》(以下简称《意见》)。《意见》指出，除法律、法规、规章特殊规定
针对海洋平台起重机的特点，分析了影响起重机安全的结构、机构、环境等因素，提出了一套完整的平台起重机安全评估体系，并建立了模糊识别的平台起重机安全评估模型，将模糊分析法运