使用MATLAB编写了数值计算程序，采用二项式拟合的数值方法，总结归纳出了进给速度和宽径比与宽展率之间的解析公式。
Using the binomial fitting method in MATLAB to program numerical calculation program, the analytical formulations between feed speed, width-radius ratio and width spread ratio were deduced.
但由于拱体的横向尺寸总是有限的，往往使得大跨径拱桥的宽跨比很小。
However, the width of an arch has a limitation which leads to the long span archs lateral stability lower because of its small ratio of width and span.
但由于拱体的横向尺寸总是有限的，往往使得大跨径拱桥的宽跨比很小。
However, the width of an arch has a limitation which leads to the long span archs lateral stability lower because of its small ratio of width and span.
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