POWRE: Wavelets Applications to Seimic Response Studies

POWRE：小波在地震响应研究中的应用

• 批准号: 0075070
• 负责人: Maria Todorovska
• 金额: $ 7.5万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-15 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075070&HistoricalAwards=false
• 关键词: POWRE; Wavelets; Applications; Seimic; Response

0075070 TodorovskaSince first introduced in mid 1980s wavelet analysis has been widely applied in many fields of science and engineering. The wavelet transform is particularly suitable for analysis of transient signals and time varying systems, because it is localized both in time and frequency. Its widespread use is also due to the existence of orthogonal and bi-orthogonal bases, the efficiency in representation of transient signals (data compression), and the availability of fast and accurate computational algorithms for signal/image transformation and reconstruction. In spite of its obvious suitability to earthquake related problems (transient by nature), the wavelet analysis has been applied very little in Earthquake Engineering and Engineering Seismology. The objective of this project is to explore various applications of wavelets to these two fields. The focus of the study will be on identification of nonlinear soil-structure systems from strong and weak motion records in structures in presence of noise, and on representation and analysis of strong ground motion.This research enhancement grant, made under the Professional Opportunities for Women in Research and Education (POWRE) program, will provide an opportunity for the Principal Investigator to initiate independent research on the application of wavelets (and modern signal processing and estimation theory, in general) to her professional field, and will create opportunities for future funding from regular NSF and other sources. This is expected to increase her chances for getting a regular tenure track faculty appointment. The Principal Investigator is a mid career researcher, with interdisciplinary education (in Physics, Civil Engineering, Applied Mathematics and Electrical Engineering), career based in Earthquake Engineering and Engineering Seismology, and with a non-tenure track faculty appointment at the University of Southern California. This grant will also provide an opportunity for her continuing presence and visibility at her home institution, where she has been the only female faculty in the Civil Engineering Department. This project will involve cooperation across two engineering disciplines (the Principal Investigator will cooperate on this project with faculty from the Electrical Engineering Department of her home institution), and participation of one graduate student (with Civil Engineering background). Finally, this project will lead to the introduction of new methodologies for understanding and modeling earthquake strong ground motion and response of structures, and consequently will contribute to the national effort for Earthquake Risk Reduction.***

0075070 Todorovska 自20世纪80年代中期首次提出小波分析以来，已广泛应用于科学和工程的许多领域。 小波变换特别适合分析瞬态信号和时变系统，因为它在时间和频率上都是局部的。 它的广泛使用还归因于正交和双正交基的存在、瞬态信号表示的效率（数据压缩）以及用于信号/图像转换和重建的快速准确的计算算法的可用性。 尽管小波分析明显适用于地震相关问题（本质上是瞬态的），但它在地震工程和工程地震学中的应用却很少。 该项目的目标是探索小波在这两个领域的各种应用。 该研究的重点是从存在噪声的结构中的强运动和弱运动记录中识别非线性土壤结构系统，以及强地面运动的表示和分析。这项研究增强补助金是根据女性专业机会提供的研究和教育（POWRE）计划，将为首席研究员提供一个机会，启动小波（以及一般的现代信号处理和估计理论）在其专业领域的应用的独立研究，并将为未来的资助创造机会来自常规 NSF 和其他来源。预计这将增加她获得终身教职教师任命的机会。首席研究员是一位职业中期研究员，接受过跨学科教育（物理、土木工程、应用数学和电气工程），职业以地震工程和工程地震学为基础，并在南加州大学获得非终身教职教师任命。 这笔赠款还将为她在母校继续存在和提高知名度提供机会，她是母校土木工程系唯一的女教师。该项目将涉及两个工程学科的合作（首席研究员将与所在院校电气工程系的教师合作），以及一名研究生（具有土木工程背景）的参与。 最后，该项目将引入新的方法来理解和模拟地震强地面运动和结构的响应，从而为国家减少地震风险的努力做出贡献。***