Background The success and complication rates of atrial fibrillation (AF) ablation may be related to regional differences in left atrial (LA) wall thickness.The
While the quadriceps muscles of human body are quite important to the daily activities of knee joints,the determination of quadriceps forces poses significant c
为满足复杂靶标背景下激光光斑形心的高精度定位要求,提出了一种基于几何特征约束残差修剪的定位方法。首先通过分析成像特点提取激光光斑;然后在几何特征约束下对残差边缘进行二次修剪,优化边缘;最后利用最小二乘拟合法得到激光光斑形心的精确定位,并将其应用于火炮的重要静态参数——弯曲度测量。实验结果表明,该方法具有较强的稳定性,定位精度高且实时性好,与传统的定位方法相比,复杂靶标上激光光斑的水平和竖直定位偏差
Background The percutaneous transcatheter closure of secundum atrial septal defect (ASD) is increasingly a widespread alternative to surgical closure.The aim of
This paper has an objective to show a developed quantitative criterion, based in two mathematical variables that explicit the deviation degree of a normal situa
Background Left ventricular hypertrophy (LVH) and geometric abnormality are associated with morbidity and mortality of cardiovascular disease and stroke.Hyperte
采用己二酸和对苯二酚对液态低Mn(相对分子质量)的EP(环氧树脂)进行扩链改性,合成了含柔性链段的高Mn固体EP。采用差示扫描量热(DSC)法对韧性EP/酚类固化剂体系的反应活性和
提出了一种通过测量拉伸应力变化计算超塑性空洞分数的方法,并推导出空洞分数的计算公式。对AZ31镁合金空洞分数的计算结果表明:温度、应变量和应变速率是影响材料超塑性拉伸
Background Human interleukin-10 (hlL-10) is a cytokine synthesis inhibitory factor,which is involved in various immune responses.The purpose of this study was t