1) two kinds of coal pillar
两类煤柱
3) coal pillar
煤柱
1.
Dimension design of coal pillar with weak plane in strip mining;
条带开采中含弱面的煤柱尺寸设计
2.
Analysis on damaged width of coal pillar in strip extraction;
条带开采煤柱破坏宽度计算分析
3.
Study on influence of excavation sequence on the stability of coal pillar under final highwall with auger mining;
到界边坡下螺旋钻机开采顺序对煤柱稳定性的影响研究
4) pillar
[英]['pɪlə(r)] [美]['pɪlɚ]
煤柱
1.
Study on the chain pillar stability of the developing entry in longwall top-coal mining;
综放开采采准巷道护巷煤柱稳定性研究
2.
The relation between district raise in the multiple coal seams and its pillars;
多煤层采区上山与煤柱之间的关系
3.
Confirmation of reasonable pillar's size in actual mining roadways;
回采巷道合理煤柱尺寸的确定
6) column-like
类柱
1.
Characteristics of MSWI fly ash leachate of the column-like leaching test;
类柱试验中焚烧飞灰浸出特性研究
补充资料:两类错误
两类错误
error of two types
两类错误(error of two types)在假设检验时,当假设H。实际上是对的,但由于我们仅根据样本的信息作出判断,仍有可能拒绝H。,这就犯了“弃真”错误,这种错误称之为第一类错误;当H。实际上不真时,我们也有可能接受H。,这是一种“存伪”错误,这种错误称之为第二类错误。在样本容量确定后,犯两类错误的概率不可能同时减少,减少其中一个,另一个往往就会增大。要它们同时减少,只有增加样本的容量。 (任旭明撰金志成审)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条