Therefore, the spacecharge reduction factor equation based on the sheath helix model is inappropriate at high frequency.
因此，使用螺旋导电面模型在较高频段计算空间电荷降低因子是不合适的。
2
The study shows that the difference of the spacecharge reduction factor between the sheath model and the perfect conducting tube is small at high frequency.
结果表明，螺旋导电面模型相对理想导电圆筒中的空间电荷降低因子在较高频段变化不大。
3
Pre-splitting blasting experiments were carried out to obtain normal pre-splitting blasting parameters such as hole diameter, hole space, gun- powder charge line density, and uncoupling factor.