急性心肌梗死患者QT变异度指数增高，可能是由于急性心肌梗死造成的心肌缺血和坏死使心室复极变异增大。
But QTVI of AMI was higher than the control group, which suggested greater repolarization liability in AMI caused by myocardial ischemia and infarction.
结果表明，利用土壤养分和光谱数据划分的管理分区内，各土壤养分的均一度得到了提高，光谱指数和产量的变异系数普遍降低。
The result showed that the homogeneous degree of the soil nutrient was increased, the variability of spectral index and the yield were reduced in the management zone divided by soil data.
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