first derivative
2.STUDY ON THE DETERMINATION OF TUNG OIL ADULTERATED IN VEGETABLE OILS BY FIRST DERIVATIVE SPECTROPHOTOMETRY
3.Peakon solutions have discontinuous first derivative on the peaks and can be described by Dirac function.
4.D by using the first derivative spectrum and REP, and the properest models were index(R2=0.9487)and parabola (R2=0.9392) respectively.
5.Contrasted with Rhizoma Dioscoreae Raman spectra, in 600 to 800, 1000to 1400regions, changes in Rhizoma Dioscoreae Raman first derivative spectra, are represented more clearly than Rhizoma Dioscoreae Raman spectra .So Rhizoma Dioscoreae raman first derivative spectra can be a accurate analysis method,supplied to Rhizoma Dioscoreae Raman spectra.
6.It is found that the first derivative spectrometric value of polysaccharide phenol sulfuric acid reaction system is proportional to the content of polysaccharides.
7.It was also found that first derivative spectrometric value of polysaccharide -phenol- sulfuric acid reaction system is directly proportional to the content of polysaccharides.
8.The integral calculus formula is deduced, in which the first derivative of physical measures of system with respect to time equals the partial derivative of physical measures of control field to time plus clear flux of physical measures passing the control line within unit time.
9.By comparing several preprocessing procedures and wavelength ranges, the optimal models could be obtained in the range of 7 501.7-6 097.8 cm -1 and 5 453.7-4 246.5 cm -1 with first derivative NIR spectra.
10.Under water stress, this project studied the correlation between leaf chlorophyll content (CHL.C) and leaf total nitrogen (TN) content, and analyzed Red Edge Area and canopy total nitrogen content using first derivative spectral data in cotton main growing periods.
