"Upgrading computational facilities for URI Seismology and Marine Geophysics"

“升级 URI 地震学和海洋地球物理学的计算设施”

• 批准号: 0727919
• 负责人: Yang Shen
• 金额: $ 6.73万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0727919&HistoricalAwards=false
• 关键词: Upgrading; computational; facilities; URI; Seismology

ABSTRACTOCE-0727919Intellectual Merit. The project will support the computational research of an expanding group of University of Rhode Island young investigators in marine seismology and geophysics. The facility will comprise a 100-processor-core, 25 node Linux Beowulf cluster with associated 30 TB RAID disk array. The provision of this infrastructure will initially facilitate significant advances in finite-frequency seismic tomography, an effort that will enable the group to achieve more accurate images of the Earth's interior structure. A new theory of propagation of real, finite-frequency waves will be applied, and finite-frequency sensitivity kernels will be calculated to determine the degree to which seismic traveltime and seismic amplitude anomalies in seismic data sets are sensitive to changes in 3D Earth structure. The improved computational resources and associated implementations of algorithms using the aforementioned theoretical developments will enable to group to solve nonlinear tomographic problems without present-day high frequency or structural limitations. In addition to the improved 3D tomographic imaging capability for the current URI group of investigators, faculty new to URI (Savage) depend on high performance computational clusters to calculate 3D synthetic seismograms, and to apply these methods to practical problems such as the creation of a model of seismic velocity, attenuation and anisotropy of the Gulf of California (supported through the NSF Margins Program). Savage further will use this cluster to continue the development and improvement of a widely-used multi-processor program (Specfem3D). Zhao has recently joined the URI group, where he will use the cluster to continue work on the scattering-integral method for calculating finite-frequency sensitivity kernels. Zhang will generate 3D models on the cluster with irregular surfaces, seafloor topography, anisotropy and seismic heterogeneity. These newly-joined URI group members have all been carrying out their calculations using machines at other institutions/countries equivalent to that to be established through this project. Thus the establishment of this class of resource at URI will provide the team with the necessary resources to carry out their core research.Broader impacts. The computational cluster will enhance URI's research infrastructure by providing a modern, high-performance supercomputer with advanced 3D graphics capabilities. The facility will continue to be used in research and undergraduate and graduate education. Results from simulations of wave propagation and mantle convection will continue to be integrated into geophysical courses to help students to gain physical intuition. A graduate course on computational geophysics will use the proposed facility. The facility is essential for graduate students to participate in research projects.

Abstractoce-0727919Intellectual功绩。该项目将支持罗德岛大学年轻研究者在海洋地震学和地球物理学上的扩展小组的计算研究。该设施将包含100个处理器核心，25个节点Linux Beowulf群集，并具有相关的30 TB RAID磁盘阵列。该基础设施的提供最初将促进有限频率地震层析成像的重大进展，这项工作将使小组能够实现地球室内结构的更准确的图像。将应用一种新的有限频率波传播的新理论，并将计算有限频率灵敏度内核，以确定在锯齿数据集中的地震行进时间和地震幅度异常的程度对3D地球结构的变化敏感。使用上述理论发展的改进的计算资源和相关的算法实现将使小组能够解决非线性断层扫描问题，而无需当今的高频或结构限制。除了当前URI研究者的3D断层摄影成像能力改进外，URI的新教师（Savage）还取决于高性能计算群集来计算3D合成地震图，并将这些方法应用于诸如诸如Seismic velocity velocity，Attennation和Anisotry of Califter of California nisiste velocity velocity of California的实用问题。 Savage将进一步使用该集群继续开发和改进广泛使用的多处理器程序（SpecFem3D）。 Zhao最近加入了URI组，在那里他将使用群集继续处理散射综合方法来计算有限频率灵敏度内核。张将在簇上产生3D模型，具有不规则的表面，海底地形，各向异性和地震异质性。这些新的URI小组成员都在其他机构/国家/国家/地区进行了计算，相当于通过该项目确定的机器。因此，在URI建立此类资源将为团队提供进行核心研究的必要资源。该计算群集将通过提供高级3D图形功能的现代高性能超级计算机来增强URI的研究基础架构。该设施将继续用于研究，本科和研究生教育。波浪传播和地幔对流模拟的结果将继续融入地球物理课程中，以帮助学生获得身体直觉。计算地球物理学的研究生课程将使用拟议的设施。该设施对于研究生参加研究项目至关重要。