Collaborative Research: Non-Parametric Inference of Temporal Data

合作研究：时态数据的非参数推理

• 批准号: 2311251
• 负责人: Likai Chen
• 金额: $ 7万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2311251&HistoricalAwards=false
• 关键词: Collaborative; Research; Non; Parametric; Inference

This project is driven by the need to address inquiries in diverse fields, including environmental sciences, epidemiology, and economics among others. The study of extreme weather events, such as tropical storms, requires meteorologists to determine whether more potent tropical storms occur more frequently than mid or low-level tropical storms over time. Epidemiologists studying the transmissibility and severity of COVID-19 utilize clinical laboratory data to evaluate the pattern of the trends. In investigating sea pollution levels, earth scientists gather data on mercury concentration in animals to determine whether there has been a rising trend in mercury concentration over the years. The primary objective of this research project is to enhance the methods used to tackle these questions and effectively communicate findings to the scientific community and the public. More informed decisions can be made based on the findings. This project also involves training and mentoring graduate students through their active involvement in the research. The research team aims to develop innovative statistical methods to study temporally observed or time-indexed multi-sample data, which consist of measurements of different subjects made at different time points. Such data do not fall within the conventional univariate or high-dimensional time series since measurements at different time points may not have an inherent connection. The investigators and collaborators will develop a systematic asymptotic theory to address this challenge to estimate and infer temporally observed multi-sample data. They will establish consistency, asymptotic normality, and an extremal distribution theory for various associated statistics and study simultaneous confidence bands and change points analysis.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目的目的是解决不同领域的问题，包括环境科学、流行病学和经济学等。研究极端天气事件，如热带风暴，需要气象学家确定随着时间的推移，更强大的热带风暴是否比中层或低层热带风暴更频繁地出现。研究新冠肺炎的传播性和严重性的流行病学家利用临床实验室数据来评估这些趋势的模式。在调查海洋污染水平时，地球科学家收集动物体内汞浓度的数据，以确定汞浓度多年来是否有上升的趋势。这一研究项目的主要目标是改进用于解决这些问题的方法，并向科学界和公众有效地传达研究结果。根据调查结果，可以做出更明智的决定。该项目还包括通过研究生积极参与研究来对他们进行培训和指导。研究小组的目标是开发创新的统计方法来研究时间观察或时间索引的多样本数据，这些数据包括在不同时间点对不同对象进行的测量。这些数据不属于传统的单变量或高维时间序列，因为不同时间点的测量可能没有内在联系。研究人员和合作者将开发一种系统的渐近理论来解决这一挑战，以估计和推断临时观察到的多样本数据。他们将为各种相关统计数据建立一致性、渐近正态和极值分布理论，并研究同时的置信度和变化点分析。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。