Under a wide range of P and V value, there are very low friction coefficient and wear, high dimensional stability for coating-metal pairs and no any damage during the test of nylon coating.

涂层在较大的P、V值范围内与各类配副均具有极低的摩擦系数和磨损量以及很高的尺寸稳定性；长期工作过程中，涂层未出现任何破坏现象。

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Purpose To compute the exact p-value of Wilcoxon matched-pairs signed-ranks test.

目的计算配对符号秩检验的确切概率。

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Because the likelihood ratio test has very good properties, especially for large sample size problem, the P-value function with this method is approached the true function.

因为似然比检验有着非常好的性质，特别是对大样本量问题，该方法求解出来的p值函数与真实p值函数非常逼近。

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