id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajst-7782	Zhang, Li; Yin, Yitong; Zeng, Jinrui	Study on Nitrite Nitrogen Based on Ultraviolet Visible Absorption Spectrometry	2023	5	.pdf	application/pdf	2888	146	49	Ultraviolet absorption spectrogram of nitrite nitrogen standard solution As can be seen from Figure 2, the absorption signal of nitrite nitrogen solution is mainly concentrated in the range of 190 to 250 nm. First, perform SG filtering on the original spectrum, then select the characteristic wavelength of the spectral data using the Continuous Projections Algorithm (SPA), and then use the Support Vector Regression (SVR) algorithm to establish a regression model to analyze a series of concentrations of nitrite nitrogen solutions, achieving rapid and real-time detection of nitrite nitrogen.	cache/ajst-7782.pdf	txt/ajst-7782.txt