对于时空机械模型的动态贝叶斯学习
Sudipto Banerjee1, Xiang Chen1, Ian Frankenburg1
1Department of Biostatistics, University of California, Los Angeles, Los Angeles, CA 90025, USA.
概括
我们提出了贝叶斯的方法来学习使用统计模拟的时空模型. 这种方法通过将机械模型与高斯过程回归相结合,有效地训练系统从噪音数据中,从而实现准确的动态建模.
科学领域:
- 计算科学 计算科学
- 统计建模 统计建模
- 机器学习 机器学习
背景情况:
- 动态机械模型对于理解复杂系统至关重要.
- 参数推理的传统方法可能是计算密集的.
- 整合机理学知识与观测数据仍然是一个挑战.
研究的目的:
- 开发一个贝叶斯框架来学习时空动态机械模型.
- 从噪音数据中实现机械系统的高效插值和训练.
- 为模型仿真提供一种分析可处理的推理方法.
主要方法:
- 在层次状态空间模型中使用高斯过程回归的统计模拟.
- 在等级矩阵变量正常和维沙特模型中,精确推断具有分析可访问的后分布.
- 动态贝叶斯转移学习用于大规模仿真.
主要成果:
- 开发了一个模拟学习器,用于高效的系统插值和训练.
- 实现了精确的推理,避免了计算上昂贵的代算法.
- 在微分方程和黑子计算机模型中证明了对逆方程问题的适用性.
结论:
- 提出的贝叶斯式学习方法为时空动态系统提供了一种高效和分析可处理的方法.
- 统计模拟与高斯过程相结合,为与数据集成机械模型提供了强大的工具.
- 该框架促进了强大的推断和跨科学领域的广泛应用.
相关概念视频
Mechanistic Models: Overview of Compartment Models
334
Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...
334
Mechanistic Models: Compartment Models in Individual and Population Analysis
226
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
226
Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
223
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
223
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
264
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
264
Multicompartment Models: Overview
478
Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
478
State Space Representation
502
The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
Consider an RLC circuit, a...
502

