相关实验视频
Updated: Jul 17, 2025

09:32
Cortical Source Analysis of High-Density EEG Recordings in Children
Published on: June 30, 2014
21.4K
贝叶斯优化与高斯过程替代模型用于源本地化
William F Jenkins1, Peter Gerstoft1, Yongsung Park1
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, USA.
The Journal of the Acoustical Society of America
|September 7, 2023
概括
我们开发了一种贝叶斯优化策略,以更快地定位水下声源. 这种方法有效地搜索地声模型参数,在模拟和实验中优于传统的采样技术.
科学领域:
- 声学 声学 在声学方面
- 海洋学 海洋学 海洋学
- 信号处理 信号处理
背景情况:
- 准确的水下来源定位对于各种应用至关重要.
- 像网格搜索这样的传统方法在计算上可能是昂贵和低效的.
- 地声学建模需要优化范围和深度等参数.
研究的目的:
- 为地球声学模型参数优化提出一个样本效率顺序贝叶斯优化策略.
- 为了提高水下声源定位的速度和效率.
主要方法:
- 使用高斯过程 (GP) 替代模型来近似目标函数.
- 采用启发式获取函数来平衡参数空间中的探索和利用.
- 连续更新GP模型以新的数据点.
主要成果:
- 贝叶斯优化策略证明了最佳解决方案的快速趋同.
- 与网格搜索和准随机抽样相比,模拟和实验数据显示出更高的性能.
- 在浅水波导环境中实现了有效的源定位.
结论:
- 序列贝叶斯优化为声源定位提供了一个样本效率高的方法.
- 这种策略显著降低了优化所需的计算成本和时间.
- 该方法在使用真实世界声学数据的实际应用中得到了验证.
相关概念视频
Types of Global Positioning System Surveys
77
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
77
Propagation of Uncertainty from Random Error
724
An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
724
Maxwell-Boltzmann Distribution: Problem Solving
1.6K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
1.6K
Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
96
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...
96
Linear Approximation in Frequency Domain
109
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
109
Propagation of Uncertainty from Systematic Error
552
The atomic mass of an element varies due to the relative ratio of its isotopes. A sample's relative proportion of oxygen isotopes influences its average atomic mass. For instance, if we were to measure the atomic mass of oxygen from a sample, the mass would be a weighted average of the isotopic masses of oxygen in that sample. Since a single sample is not likely to perfectly reflect the true atomic mass of oxygen for all the molecules of oxygen on Earth, the mass we obtain from this...
552

