近红外光谱和机器学习用于历史书籍的准确年代
在PubMed上查看摘要
概括
此摘要是机器生成的。接近红外光谱和机器学习可以准确地确定历史书籍的日期. 这种非破坏性方法预测2年内出版的年份,揭示了与纸张组成相关的关键光谱特征.
科学领域
- 分析化学
- 光谱学
- 机器学习
- 遗产科学
背景情况
- 准确的,非破坏性的年代测定方法对于遗产对象至关重要.
- 传统的约会方法可能是破坏性的或不准确的.
- 近红外光谱 (NIR) 是一种潜在的非侵入性分析技术.
研究的目的
- 评估NIR光谱与机器学习相结合的纸质书籍的有效性.
- 预测1851年至2000年之间的出版年份.
- 确定影响约会准确性的关键光谱特征.
主要方法
- 使用纸质图书中的近红外 (NIR) 光谱数据.
- 应用了三个监督机器学习算法进行预测建模.
- 分析了光谱特征,专注于纤维素和蛋白质结构,以及可减少误差的分解.
主要成果
- 两种机器学习方法实现了前所未有的预测准确性,
- 发现了包括C-H,O-H和N-H延伸外调在内的常见光谱特征.
- 书籍退化对预测准确性没有显著影响.
结论
- 与机器学习相结合的NIR光谱为历史纸质文档提供了高精度,无损的测年方法.
- 这种方法超越了现有的非破坏性遗产收藏技术.
- 已识别的光谱标记为遗产科学提供了有关材料组成和衰老的见解.
相关概念视频
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
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A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Infrared spectroscopy, also known as vibrational spectroscopy, is mainly used to determine the types of bonds and functional groups in molecules. In aldehydes and ketones, the carbonyl (C=O) bond shows an absorption around 1710 cm-1. The C=O bond vibration of an aldehyde occurs at lower frequencies than that of a ketone. In addition to the C=O absorption in an aldehyde, the aldehydic C–H bond also gives two peaks in the 2700–2800 cm-1 range. This absorption, coupled with the...

