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Table 6

Correlation coefficient matrix of each impact factor

x1x2x3x4x5x6x7
x1 −0.363 0.362 −0.093 0.120 0.106 0.011 
x2 −0.363 −0.403 0.661 −0.198 −0.176 −0.103 
x3 0.362 −0.403 −0.445 0.339 0.290 0.243 
x4 −0.093 0.661 −0.445 −0.496 −0.487 −0.405 
x5 0.120 −0.198 0.339 −0.496 0.993 0.969 
x6 0.106 −0.176 0.290 −0.487 0.993 0.979 
x7 0.011 −0.103 0.243 −0.405 0.969 0.979 
x1x2x3x4x5x6x7
x1 −0.363 0.362 −0.093 0.120 0.106 0.011 
x2 −0.363 −0.403 0.661 −0.198 −0.176 −0.103 
x3 0.362 −0.403 −0.445 0.339 0.290 0.243 
x4 −0.093 0.661 −0.445 −0.496 −0.487 −0.405 
x5 0.120 −0.198 0.339 −0.496 0.993 0.969 
x6 0.106 −0.176 0.290 −0.487 0.993 0.979 
x7 0.011 −0.103 0.243 −0.405 0.969 0.979 
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