Periodic weighting was analysed by the bearing wedge model, simultaneity, the mechanics of firstweighting and periodic weighting were expounded.
利用承压砌块模型分析了周期来压过程，并给出了初次来压和周期来压机理。
2
By field observation and simulating test of shallow seam longwall mining, the phenomenon of main roof asymmetry breaking is discovered during the firstweighting.
依据典型浅埋煤层工作面的实测和模拟，发现了采场老顶初次破断的非对称现象。
3
So even if a match is found in the Person Name field, you can use the appropriate weighting definitions to place the matching physical address records first in the list.
这样即使在 Person Name 字段中找到匹配，也可以使用适当的加权定义将匹配物理地址的记录先放入列表中。