Transform method in three-dimensional fluorescence spectra for direct reflection of internal molecular properties in rapid water contaminant analysis

2021 ◽  
Vol 250 ◽  
pp. 119376
Author(s):  
Yingtian Hu ◽  
Handan Zhang ◽  
Dongdong Zhao
Keyword(s):  
Fluorescence Spectra ◽  
Three Dimensional ◽  
Molecular Properties ◽  
Transform Method ◽  
Water Contaminant ◽  
Direct Reflection

Enhanced Performance of Ultrafiltration Membrane with Powdered Zeolite Addition for Secondary Effluent Treatment

2013 ◽  
Vol 838-841 ◽  
pp. 2712-2716
Author(s):  
Yong Tu ◽  
Yong Gang Bai ◽  
Yong Chen ◽  
Wei Jing Liu ◽  
Jun Xu ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Fluorescence Spectra ◽  
Municipal Wastewater ◽  
Three Dimensional ◽  
Treatment Plant ◽  
Ultrafiltration Membrane ◽  
Effluent Treatment ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Sem Images

The research on ultrafiltration membrane assisted by powdered zeolite for the treatment of secondary effluent from a municipal wastewater treatment plant was studied. The results show that membrane fouling rate is reduced by pre-coating the ultrafiltration membrane with powdered zeolite, and the treatment performance of secondary effluent is enhanced. UV-vis, three-dimensional excitation emission matrix (3D-EEM) fluorescence spectra and scanning electron microscopy (SEM) images for ultrafiltration were also discussed.

Component recognition with three-dimensional fluorescence spectra based on non-negative matrix factorization

2011 ◽  
Vol 25 (11) ◽  
pp. 586-591 ◽  
Author(s):  
Shaohui Yu ◽  
Yujun Zhang ◽  
Wenqing Liu ◽  
Nanjing Zhao ◽  
Xue Xiao ◽  
...  
Keyword(s):  
Matrix Factorization ◽  
Fluorescence Spectra ◽  
Three Dimensional ◽  
Component Recognition ◽  
Non Negative Matrix Factorization

WT-SVD Feature of Three Dimensional Fluorescence Spectra of Mineral Oil

2015 ◽  
Vol 52 (6) ◽  
pp. 063001
Author(s):  
田广军 Tian Guangjun ◽  
杨子臣 Yang Zichen
Keyword(s):  
Fluorescence Spectra ◽  
Three Dimensional ◽  
Mineral Oil

Three-Dimensional Fluorescence Spectra Analysis of Oil Contaminants Based on Algorithm Combination Methodology

2019 ◽  
Vol 56 (3) ◽  
pp. 033002
Author(s):  
陈至坤 Chen Zhikun ◽  
黄微 Huang Wei ◽  
程朋飞 Cheng Pengfei ◽  
沈小伟 Shen Xiaowei ◽  
王福斌 Wang Fubin
Keyword(s):  
Fluorescence Spectra ◽  
Three Dimensional ◽  
Spectra Analysis

Study on Three-Dimensional Fluorescence Spectra of Oil Concentration in Water

2011 ◽  
Vol 322 ◽  
pp. 144-147
Author(s):  
Yu Tian Wang ◽  
Li Li Yang ◽  
Xin Qiong Lu
Keyword(s):  
Quantitative Analysis ◽  
Fluorescence Intensity ◽  
Fluorescence Spectra ◽  
Three Dimensional ◽  
Measurement Model ◽  
Excitation Wavelength ◽  
Experimental Basis ◽  
Oil In Water ◽  
Oil Concentration ◽  
Fluorescence Spectrometer

According to the Lambert-Beer laws, the fluorescence spectra of oil in water were investigated by measuring excitation-emission matrixes with FS920 fluorescence spectrometer. On the basis of the three-dimensional fluorescence spectra of oil in water, the excitation wavelength of 290nm and emission wavelength of 324nm were chosen for the quantitative analysis of oil in water. The results show that the concentration of oil in water is linearly proportional to the fluorescence intensity in the range of 1ppm-100ppm, and the measurement model of concentration is obtained with the linear correlation coefficient of 0.9993. The artificial samples has also been tested and the results are satisfactory. The recovery is in the range of 92%-106%. The research provides experimental basis for the quantitative analysis of multi-component oil in water.

Transient Thermoelastic Stress Fields in a Half-Space

2002 ◽  
Vol 125 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Shuangbiao Liu ◽  
Qian Wang
Keyword(s):  
Stress Field ◽  
Half Space ◽  
Frictional Heating ◽  
Three Dimensional ◽  
Thermoelastic Stress ◽  
Parabolic Type ◽  
Elastic Half Space ◽  
Transform Method ◽  
Rough Surface Contact ◽  
Thermoelastic Stress Field

Computing the thermoelastic stress field of a material subjected to frictional heating is essential for component failure prevention and life prediction. However, the analysis for three-dimensional thermoelastic stress field for tribological problems is not well developed. Furthermore, the pressure distribution due to rough surface contact is irregular; hence the frictional heating can hardly be described by an analytical expression. This paper presents a novel set of frequency-domain expressions (frequency response functions) of the thermoelastic stress field of a uniformly moving three-dimensional elastic half-space subjected to arbitrary transient frictional heating, where the velocity of the half-space, its magnitude and direction, can be an arbitrary function of time. General formulas are expressed in the form of time integrals, and important expressions for constant velocities are given for the transient-instantaneous, transient-continuous, and steady-state cases. The thermoelastic stress field inside a translating half-space with constant velocities are illustrated and discussed by using the discrete convolution and fast Fourier transform method when a parabolic type or an irregularly distributed heat source is applied.

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