In this paper,the role of crushing operation on coarse aggregates and its influence on shape characteristics distributio......

Morphological parameters of coarse aggregates,including the angularity index (Al),flat and elongated ratio,flatness rati......

The mechanical behavior of granular materials depends much on the shape of the constituent particles. Therefore appropri......

目的 探讨头颅汤氏位不同投照角度对不同头型患者照片显示效果的影响.方法 根据头颅指数选取长、中、短3例头型头颅骨骼标本, 分别......

通过分析国内关于交通标志视认性的研究,得出标志的最远可视认距离和消失距离。并计算出不同车型的车辆在最远可视距离和消失距离......