The generalized large well method is not applicable when the influence radius doesn't exit and the complicated hydrogeological condition is not fit to the condition of Dupuit well-flow formula.

但是当水文地质条件复杂，不能引用影响半径时，就不符合裘布依井流公式的适用条件，也就不能再用大井法计算排水量；

youdao

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。

youdao

The Character of the system, the calculative formula of the frequences as well as flow chart of program have been presented in this paper.

文中介绍了系统的特点，列举了串联谐振中各频率特性的计算公式及程序框图。

youdao