Using a complex analytical signal representation, the free-space propagation properties of ultrashort pulsed Bessel-Gauss beams whose waist width is independent of frequency are studied.
使用复解析信号法研究了束宽与频率无关的超短脉冲贝塞尔·高斯光束在自由空间的传输特性。
For the typical section of the encircling ring, the bleacher roof is supported on the hybrid beams that composed of steel ribs bolted with glulam and reinforced concrete independent walls.
从环形形体的标准剖面上来看，看台屋顶是由带有胶合板的钢架梁以及预制混凝土墙支撑。
It contains several independent warehouses made of reinforced concrete beams and bricks. Each window of the long and vast inner space is equipped with grille to prevent from direct sunlight.
建筑特色为独栋式厂房建筑，长廊式的室内空间，具有钢筋混凝土柱梁系统及加强砖造结构，其中建筑物每一扇窗子都设有窗栅，避免阳光直射，使仓库存物具备防晒功能。
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