目的 探讨定量组织速度成像(QTVI)评价充血性心力衰竭(CHF)患儿左心室非同步运动与左室做功指数Tei指数的关系.方法 正常小儿40例,......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

目的 应用定量组织速度成像(quantitative tissue velocity imaging,QTVI)分析不伴心肌梗死的冠心病患者左心室心肌收缩的运动特征......

Deciduous trees with high-density wood that occur in dry seasonal tropical regions respond to rainfall seasonality with ......

This paper proposes the concept of generalized L systems, GL systems for short, which can describe asynchronized concurr......