ramp 的词源

“从主干道延伸出去的倾斜单行道”，1954年，来自 off-（形容词），源自 off（介词），加上 ramp（名词）。

“增加或提升”，1968年，最初在技术术语中使用；来自 ramp (n.) 意为“坡道或倾斜面”。

Thus for correlation and analysis, it is more accurate to approximate the reactivity increase by a linear rise (ramp) than by an instantaneous increase (step); then the power behavior depends on the rate of rise (ramp rate) and on the initial power. Data from kinetic experiments would be represented by a plot in three dimensions of peak power versus ramp rate and initial power. This can be represented on paper by a plot of lines of constant peak power on a graph having ramp rate and initial power as ab[s]cissa and ordinate. [V.K. Paré and S. Visner, "Experimental Program for HRE at High Power: Part II, " 1953]

因此，对于相关性和分析，近似反应性增加通过线性上升（ramp）比通过瞬时增加（step）更准确；然后功率行为取决于上升速率（ramp rate）和初始功率。动力学实验的数据将通过一个三维图表示，峰值功率与上升速率和初始功率的关系。这可以通过在纸上绘制一个图来表示，图中恒定峰值功率的线在以上升速率和初始功率为横纵坐标的图表上。[V.K. Paré and S. Visner, "Experimental Program for HRE at High Power: Part II, " 1953]

相反的 ramp down 证实于1984年。