木材种类的近红外光谱和模式识别

您所在的位置:网站首页 木材的分类和分类方式 木材种类的近红外光谱和模式识别

木材种类的近红外光谱和模式识别

2024-07-15 15:28:29| 来源: 网络整理| 查看: 265

Identification of wood species is an important part of wood processing and commerce. The traditional methods of wood species identification mainly include microscopic detection and wood texture recognition which are complex, time-consuming and costly. They cannot meet the current needs. Near infrared spectroscopy (NIRS) of wood combined with pattern recognition methods were used to identify wood species. NIRS combined with three kinds of pattern recognition methods including principal component analysis (PCA), partial least squares discriminant analysis (PLSDA) and soft independent modeling of class analogy (SIMCA) were used to identify fifty-eight wood species. Five spectral preprocessing methods including 5 point smoothing, standard normal variable (SNV), multiplicative scatter correction (MSC), Savitzky-Golay first derivative (SG 1st-Der) and wavelet derivative (WD) were used to spectral transform. The correct recognition rate (CRR) of calibration and test sets were used for evaluation index of models. The results showed that the wood species could not be identified by using the first three principal components. In PLSDA model, the CRR values of calibration and test sets for original spectra model were the highest, which were 88.2% and 88.2%, respectively. The CRR values of calibration and test sets for 5 points smoothing model were 88.1% and 88.2%. The CRR values of calibration and test sets for SNV model were 84.4% and 84.5%. The CRR value of calibration and test sets for MSC model were 83.1% and 84.2%. The CRR values of calibration and test sets for SG 1st-Der model were 81.8% and 82.7%. The CRR values of calibration and test sets for WD (the wavelet basis is “Haar” and the decoposition scale is 80) model were 87.3% and 87.2%. In PLSDA models, the original spectra model had the best results compared to others. In SIMCA model, the CRR values of calibration and test sets for original spectra were 99.7% and 99.4%. The CRR values of calibration and test sets for 5 points smoothing were 100% and 100%. The CRR values of calibration and test sets for SNV model were 99.5% and 99.1%. The CRR values of calibration and test sets for MSC model were 99.0% and 98.4%. The CRR values of calibration and test sets for SG 1st-Der model were 98.4% and 99.0%. The CRR values of calibration and test sets for WD model were 100% and 100%. Compered to others spectra processed by 5 points smooting and WD had a best results in SIMCA models, the CRR values of calibration and test sets were 100%. Three kinds of pattern recognition methods combined with five spectral preprocessing methods were used to classify 58 kinds of wood. It could be concluded that the PCA method can’t explicitly classify 58 wood species because of complex properties of wood leading to the scatters of each wood species interwined with each other in PCA distribution diagram. The PLSDA model of original spectra could get a better result with the CRR value of 88.2% and 88.2% for calibration and test sets, respectively. The best SIMCA models were constructed by 5 point smoothing or WD preprocessing methods with the CRR of 100% for calibration and test sets. However, the factor of the WD-SIMCA model was smaller than 5 point smoothing method, and the model was more parsimonious, so WD-SIMCA model was an optimal model. The paper showed that spectral preprocessing methods can improve the accuracy of identificationof wood species, and SIMCA supervised pattern recognition method can be used to build effective identifying model and NIR combined with pattern recognition method can provide a rapid and simple method for identification of wood species.



【本文地址】

公司简介

联系我们

今日新闻


点击排行

实验室常用的仪器、试剂和
说到实验室常用到的东西,主要就分为仪器、试剂和耗
不用再找了,全球10大实验
01、赛默飞世尔科技(热电)Thermo Fisher Scientif
三代水柜的量产巅峰T-72坦
作者:寞寒最近,西边闹腾挺大,本来小寞以为忙完这
通风柜跟实验室通风系统有
说到通风柜跟实验室通风,不少人都纠结二者到底是不
集消毒杀菌、烘干收纳为一
厨房是家里细菌较多的地方,潮湿的环境、没有完全密
实验室设备之全钢实验台如
全钢实验台是实验室家具中较为重要的家具之一,很多

推荐新闻


图片新闻

实验室药品柜的特性有哪些
实验室药品柜是实验室家具的重要组成部分之一,主要
小学科学实验中有哪些教学
计算机 计算器 一般 打孔器 打气筒 仪器车 显微镜
实验室各种仪器原理动图讲
1.紫外分光光谱UV分析原理:吸收紫外光能量,引起分
高中化学常见仪器及实验装
1、可加热仪器:2、计量仪器:(1)仪器A的名称:量
微生物操作主要设备和器具
今天盘点一下微生物操作主要设备和器具,别嫌我啰嗦
浅谈通风柜使用基本常识
 众所周知,通风柜功能中最主要的就是排气功能。在

专题文章

    CopyRight 2018-2019 实验室设备网 版权所有 win10的实时保护怎么永久关闭