Seite - 909 - in Book of Full Papers - Symposium Hydro Engineering

0H represents the water level of the initial monitoring day and H represents the water level of the current monitoring day. The multicycle simple chord factor is chosen as the temperature component   T t : 0 4 sin sin 365 365 tt X     , 05 cos cos 365 365 tt X     , 06 22 sin sin 365 365 tt X     , 0 7 22 cos cos 365 365 tt X     . 0t represents the initial monitoring day and t represents the current monitoring day. There are four factors selected as the irreversible components   t  : 8 0X     , 9 0ln lnX     , 0 10 0 1 X         , 0( ) 11 1X e       . 0 is 0 /100t and  is /100t . The above-mentioned 11 components are analyzed by PCA, and the results are shown in Table 1 and Table 2. Table 1 The eigenvalue and contribution rate of the components Component Eigenvalue i Variance contribution rate/% Cumulative variance contribution rate /% 1 4.429 40.264 40.264 2 2.852 25.923 66.187 3 1.223 11.121 77.308 4 0.907 8.250 85.558 5 0.733 6.666 92.224 6 0.577 5.241 97.465 7 0.237 2.151 99.616 8 0.202 0.181 99.797 9 0.015 0.132 99.929 10 0.007 0.067 99.996 11 0.000 0.004 100.000 909