fiducial confidence ellipse

例句：

1. 1.The fiducial confidence ellipse is crucial for the accuracy of the model.
   置信椭圆对于模型的准确性至关重要。
2. 2. The fiducial confidence ellipse helps to determine the optimal parameters for the model.
   置信椭圆有助于确定模型的最优参数。
3. 3. The fiducial confidence ellipse is used to estimate the uncertainty in the model's predictions.
   置信椭圆用于估计模型预测的不确定性。