US-France Cooperative Research: Solutions for Rapid Seismic Imaging of Subterranean Objects

这个为期三年的美法合作研究项目的目的是开发一种先进的计算基础，利用弹性地震波对地下物体进行方便和经济的3D成像。与现有的三维地震分析相比，所提出的成像技术将围绕边界积分方程（BIE）方法进行，因此只呈现隐藏物体的轮廓。这种仅限边界的传感方法起源于雷达和声纳技术，但在地震勘探的背景下，这种方法在很大程度上尚未得到探索。对地下物体成像的需求跨越了社会的许多方面，从土木工程到勘探地震学，环境修复和国土安全应用。该项目涉及由明尼苏达大学的Bojan Guzina和法国巴黎综合理工学院的Marc Bonnet领导的研究小组。他们最近开发了一种原型算法，证明BIE公式可以显着减少识别地下开口所需的计算工作量。在这一初步发展的基础上，研究将集中在更广泛的地下条件下的稳健性。他们计划进入旨在实施新传感技术的概念验证阶段。美国研究生将参与该项目，培养国际研究技能，并在职业生涯早期建立国际联系。该项目将推动一种新的、仅限边界成像技术的发展，用于地下物体的稳健地震圈定。这项研究的潜在应用包括地下设施和未爆炸弹药的快速探测，城市地区地下基础设施的成本效益测绘，以及埋藏废物的非侵入性划定。在这些地区，对快速、经济的三维地震成像的需求尤其明显，因为目前的电磁测量可能不足。该项目由美国国家科学基金会（NSF）和法国国家科学研究中心（CNRS）联合资助。美国国家科学基金会为美国调查人员和学生访问法国提供支持。法国国家调查中心承担了法国调查人员访问美国的费用。

0340590GuzinaThe aim of this three-year U.S.-France cooperative research project is to develop an advanced computational basis for expedient and cost-effective 3D imaging of underground objects using elastic, seismic waves. In contrast to existing 3D seismic analyses, the proposed imaging technology will revolve around a Boundary Integral Equation (BIE) method so that only the outline of a hidden object is rendered. This boundary-only sensing approach has its origins in radar and sonar technologies, but has been largely unexplored in the context of seismic surveys. The need for imaging of subterranean objects spans many aspects of society, ranging from civil engineering to exploration seismology, environmental remediation, and homeland security applications.The project involves research groups led by Bojan Guzina at the University of Minnesota and Marc Bonnet at the Ecole Polytechnique in Paris, France. They recently developed a prototype algorithm, which demonstrates that BIE formulations could significantly reduce the computational effort needed to identify underground openings. Building on this initial development, the research would focus on robustness for a wider class of subterranean conditions. They plan to proceed to a proof-of-concept phase aimed at implementing the new sensing technology. U.S. graduate students will participate in the project, developing skills in international research and establishing international ties early in their careers.The project will advance the development of a novel, boundary-only imaging technique for robust seismic delineation of underground objects. Potential applications of this research include rapid detection of underground facilities and unexploded ordnances, cost-effective mapping of subterranean infrastructure in urban areas, and non-invasive delineation of buried waste. The need for fast and economic 3D seismic imaging in these areas is especially pronounced in situations where current electromagnetic surveys may be inadequate. This project is jointly supported by the National Science Foundation (NSF) and the Centre National de la Recherche Scientifique (CNRS). NSF provides support for visits to France by the U.S. investigators and students. The CNRS covers the costs of visits to the United States by the French investigators.