根据衍射积分公式, 对连续多模激光束通过随时间变化相位片的变换特性进行了数值模拟, 详细地讨论了相位片单元尺寸和相位变化频率......

Focusing properties of Gaussian beam induced by nonspiral and spiral phase plates are investigated numerically. The nons......

该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......