在法医玻璃比较中,LA-ICP-MS特征的高斯化改进了校准
Pablo Ramirez-Hereza1, Daniel Ramos1, Juan Maroñas1
1AUDIAS Laboratory - Audio, Data Intelligence and Speech, Escuela Politecnica Superior, Universidad Autónoma de Madrid, Calle Francisco Tomás y Valiente 11, 28049 Madrid, Spain.
Forensic science international
|June 5, 2023
概括
法医玻璃比较通过简化复杂的数据分布来增强. 本研究介绍了高斯化技术,用于在玻璃分析中更可靠的概率比计算.
科学领域:
- 法医科学 法医科学 法医科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 法医玻璃比较依赖于使用激光除诱导合等离子体与质谱学 (LA-ICP-MS) 的多元元素分析.
- 计算法医玻璃分析的概率比率通常需要复杂的概率模型来计算特征变化.
- 玻璃特征的来源之间的变化往往需要复杂的内核密度函数来进行准确的建模.
研究的目的:
- 通过采用高斯化技术,简化法医玻璃比较中的概率建模.
- 调查不同规范化方法的有效性,以改善高斯模型适合LA-ICP-MS玻璃数据.
- 提高法医玻璃分析中概率比率的可靠性和校准.
主要方法:
- 利用LA-ICP-MS的多元元素特征进行法医玻璃比较.
- 应用高斯化作为预处理步骤来简化特征分布.
- 探索了边缘高斯化 (组图匹配,叶约翰逊转换) 和联合高斯化 (规范化流动).
主要成果:
- LA-ICP-MS玻璃特征的高斯化改进了对更简单的高斯模型的适应性.
- 拟议的预处理步骤导致了更好地校准的概率比率.
- 通过改进的概率比率计算,在法医玻璃比较中表现出增强的性能.
结论:
- 通过高斯化简化复杂特征分布,为法医玻璃分析提供了更实用的方法.
- 规范化技术对于使用LA-ICP-MS数据实现更好的高斯模型假设至关重要.
- 这项研究证实,高斯化特征向量导致了更可靠的法医玻璃比较.
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