123 asked 3周 ago
我先开始拟合Regression Parameter，然后选择cce，输入大气压101.325和油密度和黏度，然后进行调参，但是最后跑出来的结果都显示NaN，还有Delete PVC3 1 : zero gradient等，以及以下内容，请问应该如何解决。
***** Error in REGRES. The sum of squares is insensitive to the present choice of
regression variables. Please choose another set.
=================== FATAL ERROR (from subroutine: REGRES) ====================
Number of active regression variables equals to zero
Cannot proceed with the calculation. Terminating
==============================================================================
STOP
Terminating simulation: Fatal error.
End of Simulation: Abnormal Termination
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123