Aviation gamma energy spectrum data NASVD noise reduction effective singular value number determination method

• Main Authors: ZHANG SHENG, WANG YONGJUN, WANG HUIBO, WANG HU, TANG SHOUPU, WANG QIANG, WANG RUIJUN, ZHANG CHUNLEI, MENG FANXING
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a method for determining the number of effective singular values of NASVD noise reduction of aviation gamma energy spectrum data, and the method comprises the steps: constructing an input spectral line data matrix, obtaining a principal component matrix and an amplitude matrix through employing an NASVD algorithm, carrying out the classification of the obtained spectral line principal components through employing a sliding window method, carrying out the spectral line reconstruction of the classified spectral line principal components, and obtaining a series of reconstruction spectral lines. Then, correlation between adjacent spectral lines in the series of reconstructed spectral lines is analyzed and calculated, and a series of correlation coefficients of the reconstructed spectral lines are obtained; and determining the number of effective singular values by taking the absolute value of the correlation coefficient as a judgment basis. The number of the effective singular values in N