easement curve

基本解释

Easement curve was introduced, whereby curvature changes steadily form a straight line to the desired radius.
緩和曲線推出，即曲率變化，穩步形成一條直線，以達到預期的半逕。
It presents the rigorous method to calculate the intersecting point coordinate of the straight line with the parallel to the easement curve.
提出了計算直線與緩和曲線平行線交點座標的嚴密方法。
A new calculating formulae is suggested for selecting curveradius in horizontal realinement under the condition of unchanged length of easement curve.
另外建議一個在既有緩和曲線不改動時計算曲線半逕的公式。