The rise of Amazon and its rival, Netflix, highlights how viewers are increasingly turning to streaming so they can watch shows on demand without the need for expensive cable or satellite subscriptions. 亚马逊及其竞争对手Netflix的崛起,突显出越来越多的观众正转向流媒体服务,以便随时点播收看节目,而无需缴纳昂贵的有线或卫星费用。
These are prestress in cables, sag of cables, rise of arches, the vertical flexible stiffness of arches and the axial stiffness ratio between the cable and the arch. 这些参数为索预应力、索垂度、拱矢高、拱竖向抗弯刚度以及索和拱的轴向刚度比。
When greater the ratio of rise to span of main cable is adopted, the structural rigidity becomes greater and the internal force caused by live load becomes smaller. 增大主缆矢跨比和加劲梁拱度,可以提高结构刚度,减小活载产生的内力;
The relationship between frequency and prestress, ratio of rise to span of tensioned cable and membrane structure are also studied. 系统分析了索膜结构自振特性与预应力、矢跨比、索初始应力等的关系。
Almost all cable lines electrical insulation fault occurs before ( except outside direct damage) the temperature rise of cables or partial accessories, which leads to accelerated insulation breakdown and even cable fire [ 1]. 几乎所有电缆线路电气绝缘性故障发生前(除外力直接破坏)都会引起电缆或附件局部温度的上升,进而导致绝缘破坏加速直至击穿引起电缆着火[1]。
When load or environmental temperature increased, the temperature of cable joint will rise. The cable joint may explode when the temperature is over critical value. More seriously, that may lead to great power failure or fire. 当运行负荷增加或环境温度升高时,电缆接头温度容易随之上升,当超过电缆所能承受的临界值时,电缆接头就有可能发生爆炸,造成大范围的断电或是引起火灾。
In actual power cable operation, it will be able to cause the local temperature of cable or cable accessories to rise before the cable has electrical failure, resulting in further damage until insulation breakdown. 在电缆运行过程中,电缆线路发生电气故障前都会引起电缆或附件局部温度的上升,从而导致绝缘进一步破坏直至击穿。
With the increasing of the ratio of rise to span, tension of bearing cable reduce and pedestrian-induced acceleration response increase. 随着猫道矢跨比的增大,承重绳索力减小,猫道在人行荷载作用下产生的加速度响应增大。