Its lower fixed point is absolute zero.
其低端固定点温度是绝对零度。
The ceiling system should satisfy these requirements that using lower chord ball as fixed point, adapting space change of hyperboloid steel grid, grid settlement under snow load.
其天花体系要满足以屋面网架下弦球为固定点和适应双曲面的空间变化、网架雪荷载作用下沉、热胀冷缩等变形运动。
Some efficient tools such as topological degree theory, fixed point theory and lower and upper method have been applied.
使用的主要方法有锥上的不动点理论、拓扑度理论和上下解方法等。
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