The influence of porosity on the trapped field achievable in 22 YBCO bulk superconductors of different sizes has been investigated and evaluated（调查和评估） using Spearman's correlation coefficient（相关系数） in order to explore the significance of these critical features in a statistically significant way.
本研究选取 22 个不同尺寸的钇钡铜氧（YBCO）块体超导体，采用斯皮尔曼相关系数研究并分析了孔隙率对其可实现俘获场的影响，旨在从统计学角度探究这些关键特征的显著作用规律。（长难句）
The diameter of the single grain YBCO bulk sample
correlates strongly with trapped field, and significantly more so than the effect of porosity.
YBCO 单晶块体样品的直径与俘获场呈强相关性，且该相关性显著高于孔隙率对俘获场的影响。
Therefore, the direct effect of porosity on the average Jc was investigated as the main aim of this investigation.
本研究将探究孔隙率对平均临界电流密度（Jc）的直接影响作为核心研究目标。
A correlation was found between the average Jc calculated from trapped field measured at the top and bottom of the single grain and the porosity of the sample.
研究发现，由单晶样品顶部和底部的俘获场计算得到的平均临界电流密度（Jc）与样品孔隙率之间存在相关性。
This observation suggests that any method of reducing the porosity may significantly improve Jc and trapped field.
该研究结果表明，任何能够降低孔隙率的方法，均可能显著提升材料的临界电流密度（Jc）与俘获场性能。