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Spectral data were pretreated by using smoothing and standard normal variate (SNV) methods.
Principal components analysis (PCA) was performed after data were pretreated by mean centering and Pareto scaling.
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In this new method, the original data is pretreated by using wavelet denoising method to avoid the mode mixture in the subsequent EMD procedure.
Now, we consider the spectrum precoder G in the HC system and thus the transmitted data are pretreated by WFRFT matrix W α. Thereby, the spectrum of the HC system can be expanded from (7), expressed as S_{alpha}(f)=mathbf{a}^{T}(f cdot mathbf{G}mathbf{d}_{alpha}=mathbf{a}^{T}(f cdot mathbf{G}mathbf{W}_{alpha}mathbf{d} (9).
Lignocellulosic feedstocks were pretreated by SO2-catalyzed steam and/or EO pretreatment as described previously [ 29].
Tissue sections were pretreated by standard protocol using the VP2000™ slide pretreatment instrument (Abbott Molecular).
Plasma samples were pretreated by protein precipitation with methanol.
The plasma samples were pretreated by protein precipitation with acetonitrile.
The polar monomers were pretreated by alkylaluminum before the polymerization.
The obtained AC samples were pretreated by adding into HNO3 solution with 24 h.
Prior to polymerization reaction, graphite nanoparticles were pretreated by ultrasonic dispersion.
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