DFT Feature Analysis of Corn Varieties Based on Near Infrared Spectra

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	DFT Feature Analysis of Corn Varieties Based on Near Infrared Spectra
	Li YP ; Li WJ ; Lai JL
刊名	spectroscopy and spectral analysis
	2011
卷号	31 期号:1 页码:119-122
关键词	Near infrared spectra (NIRS) Corn seed Discrete fourier Transform (DFT) Difference degree Character analyse SPECTROSCOPY CALIBRATION MODEL
ISSN号	1000-0593
通讯作者	li, wj, chinese acad sci, inst semicond, beijing 100083, peoples r china. fog.2000@yahoo.com.cn ; wjli@semi.ac.cn
学科主题	人工智能
收录类别	SCI
语种	中文
公开日期	2011-07-06 ; 2011-07-15
附注	the present paper develops a new approach to the analyse of corn based on discrete fourier transform (dft). the experiment data is of 37 varieties of corn seed with the fourier transform near infrared spectrometer in the wave number range from 4 000 to 12 000 cm(-1). analyse of the origin data found that as the wave number increases, the data noise also increases. firstly, the paper defines a calculation method of interspecific and intraspecific differences qm to measure the effectiveness of feature selection. secondly, qm was used to analyse the original data and dft-section data. experimental results show that by choosing data of dft with wave number range from 4 000 to 7 085 cm(-1), the mean value and the peak value of the the qm curve markedly improved relative to the full band original data. the mean value was enhanced from the original 4. 804 9 to 8. 513 8, and the max of the peak value was enhanced from the original 35. 924 0 to 60. 821 6, while the min of the peak value was enhanced from the original 2. 891 8 to 3. 741 5. data feature points (qm value of large point) are more concentrated than the original data after dft. such a result is most conducive to extracting the characteristics of corn seed.
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/21373]
专题	半导体研究所_半导体人工神经网络实验室
推荐引用方式 GB/T 7714	Li YP,Li WJ,Lai JL. DFT Feature Analysis of Corn Varieties Based on Near Infrared Spectra[J]. spectroscopy and spectral analysis,2011,31(1):119-122.
APA	Li YP,Li WJ,&Lai JL.(2011).DFT Feature Analysis of Corn Varieties Based on Near Infrared Spectra.spectroscopy and spectral analysis,31(1),119-122.
MLA	Li YP,et al."DFT Feature Analysis of Corn Varieties Based on Near Infrared Spectra".spectroscopy and spectral analysis 31.1(2011):119-122.