应用二维单侧容限系数公式，提出了一种测定金属材料疲劳裂纹扩展速率的小样本方法。
A small sample method for testing fatigue crack growth rate curve of steel was presented in this paper using a formula of two-dimensional one-side tolerance factor.
在此误差曲线的基础上，以实际评价过程能够接受的置信程度为标准，确定小样本方法的评价极限，取得了很好的效果。
On the basis of the error curve, with the accepted degree of confidence as the standard, the evaluation limitation for small sampling method was...
试验结果表明该方法是有效、可行的，且在小样本情况下比BP神经网络具有更高的诊断精度。
The test shows that this method is effective and feasible, and has higher diagnosis precision than BP neural network in cases of fewer samples.
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