Mathematical analysis leads to a formula for this dependence, which is analogous to the formulae (2) and (3).

依赖于这个，数学分析得出一个公式，这个公式类似于公式(2)和(3)。

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A precise formula for equivalent load of prestressing force in curved girder of arc form is derived from the fundamental formulae of differential geometry.

由微分几何基本公式导得圆弧曲线梁中预应力等代荷载的精确公式，预应力钢索在曲梁中竖弯与平弯均较平缓，此时公式可得以简化。

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With equivalent flow resistance method and on the base of the productivity formulae of a horizontal well, a new productivity formula of a fishbone well was derived in the paper.

根据等值渗流阻力方法和水平井产能计算公式推导了鱼骨型水平井产能计算公式。

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