The reliability of simple correlation coefficient is lower because of the cross correlation of agronomic character indices, and the reliability of partial correlation coefficient is higher.
The self - correlation coefficient and cross-correlation coefficient are also calculated.
计算出自相关系数和互相关系数；
3
By changing the cross sectional radius decay coefficient of the exponential metal horns, the longitudinal and torsional vibrations in the transducer could resonate at the same resonance frequency.