Adaptive Methodology for Functional Biomedical Data

功能生物医学数据的自适应方法

基本信息

批准号：
7778328
负责人：
JEFFREY S MORRIS
金额：
$ 25.4万
依托单位：
UNIVERSITY OF TX MD ANDERSON CAN CTR
依托单位国家：
美国
项目类别：
财政年份：
2004
资助国家：
美国
起止时间：
2004-03-01 至 2012-02-29
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): An ever-increasing number of biomedical studies yield functional data sampled on a fine grid. These type of data are frequently high dimensional and complex with many irregular features like peaks and change points. There is currently a dearth of existing rigorous statistical methods for analyzing this type of data. The goal of this research program is to develop new Bayesian methodology that provides a unified framework for modeling and performing inference on samples of curves that is flexible enough to apply to a variety of applications, from various experimental designs, and can answer a broad range of research questions. 1. We will develop new methodology within the wavelet-based functional mixed model framework that accommodates outlying curves, a broader class of within- curve covariance structures, and higher dimensional functional data, making it applicable to a broad range of functional data. 2. We will develop methods to classify individuals based on their functional data, e.g. proteomic profiles, in a way that allows us to combine information across functional and scalar factors of multiple sources. We will develop methods to perform Bayesian functional hypothesis testing. 3. We will develop adaptive methods for relating functional predictors to functional responses. 4. We will develop methods for adaptive functional principal components analysis and for principal component-based functional mixed models, which represents a data-driven modeling framework that is extremely flexible in taking into account the complex structure that may be present in the functional data. 5. We will apply the methods to a number of cancer-related studies yielding functional data, including various types of proteomics and genomics data. 6. We will develop efficient, easy-to-use, freely available code to fit the methods described in this proposal.

描述（由申请人提供）：越来越多的生物医学研究产生了在精细网格上采样的功能数据。这些类型的数据通常是高维且复杂的，具有许多不规则特征，例如峰值和变化点。目前缺乏用于分析此类数据的严格统计方法。该研究计划的目标是开发新的贝叶斯方法，该方法提供一个统一的框架，用于对曲线样本进行建模和推理，该框架足够灵活，可以适用于各种实验设计的各种应用，并且可以回答广泛的问题研究问题。 1. 我们将在基于小波的函数混合模型框架内开发新的方法，该框架可容纳外围曲线、更广泛的曲线内协方差结构和更高维的函数数据，使其适用于更广泛的函数数据。 2. 我们将开发根据功能数据对个体进行分类的方法，例如蛋白质组图谱，使我们能够将多个来源的功能和标量因素的信息结合起来。我们将开发执行贝叶斯函数假设检验的方法。 3. 我们将开发适应性方法，将功能预测因子与功能反应联系起来。 4. 我们将开发自适应函数主成分分析和基于主成分的函数混合模型的方法，它代表了一种数据驱动的建模框架，在考虑函数数据中可能存在的复杂结构时非常灵活。 5. 我们将把这些方法应用到一些与癌症相关的研究中，产生功能数据，包括各种类型的蛋白质组学和基因组学数据。 6. 我们将开发高效、易于使用、免费提供的代码来适应本提案中描述的方法。