FTIR Basic Organic Functional Group Reference Chart (PDF) Functional groups are structural units within organic compounds defined by specific atom and bond arrangements. Infrared is a powerful identification tool for functional groups because of the similar absorption frequencies for those groups in dif...
Infrared spectrum chart peak positions were basically the sameꎬ and the chemical composition were roughly the same. They were composed of carbohydrateꎬ proteinꎬ lipid and other biological molecular vibration spectrum band. From 1 800 to 1 000 cm~1 for second derivative conductionꎬ the ...
independentpeakandoverlappeak.Thewavenumberaccuracycanimprove5to10timeswhentheoverlapofwavenumberiSserious,whilethewavenumberaccuracycanimprove1000timeswhentheoverlapofwavenumberisfine.3.Asthediscretespectrumchartatlaslinesarelimited,thespectruminformationbetweenspectrumlinescannotbegotdirectly.Inanalysisofspectrumchart,the...
and analysed and compared different genra of Zin-giberaceae and different species of the same genus in the infrared spectrum picture. The combined with clustering analy-sis of. Infrared spectrum chart peak positions were
固定权和阈值 步骤 1 FTIR 特征值和预处理 修正输入层到隐含层 各节点的权和隐含层 各节点的阈值 修正隐含层到输出 层各节点的阈值 N 输入待分类数据 权和阈值已经固定好的神经网 络模型 输出分类结果 步骤 2 图 3 BP 算法流程 Fig 3 BP algorithm flow process chart 本研究的计算过程分为两个步骤.步骤...
Tripetch, P.; Borompichaichartkul, C. Effect of packaging materials and storage time on changes of colour, phenolic content, chlorogenic acid and antioxidant activity in arabica green coffee beans (Coffea arab. L. Cv. Catimor). J. Stored Prod. Res. 2019, 84, 101510. [Google Scholar] [...