Association rules mining is an important technique in data mining and kdd, but some problems exist in the association riles mining based on support and confidence 摘要关联规则挖掘是数据挖掘和知识发现中一门重要技术，但基于支持度置信度框架的关联规则挖掘存在一些问题。
Regularly riled criterion and constitutive model to rock mass are described in this paper . sometimes four-parameter yield criterion which may degenerate to other regularly yield criterions in some certain conditions are described, too 文中综述了岩体材料常用的屈服准则和本构模型，同时论述了四参数屈服准则在一定条件下可退化为其它几类常用的屈服准则。
By appyling the strength parameter of non-saturated desert sand acquired by testing the paper calculatal the allowable of pile hole with different different diameters, nd wt the be nd digl-- orthe at wtngthe rile hole ty rare 应用强度试验确定的非饱和沙漠砂强度参数，计算了不同孔径的桩孔容许挖深，并用有限单元法分析了轴对称状态下桩孔周边应力、位移的分布和变化。
Characteristic rile of vibration response is obtained in various cases of rub-impact . the result that the 1 / 3x, 2 / 3x sub-harmonic components ( x denotes operating frequency component ) occur in inception of rub-impact in the case of sharp rub-impact under certain condition, is obtained via theoretical and experimental analysis . ( 2 ) dynamics model of jeffcott nonlinear rotor with eccentric between stator and rotor is built based on rub-impact force (1）采用并改进了已有的转子尖锐碰摩模型，通过定量和定性的理论分析，获得了尖锐碰摩转子振动响应形式；设计了尖锐碰摩转子试验台并开展了细致的实验研究，获得了不同碰摩情况下的振动响应特征规律；通过理论和实验分析，得出在尖锐碰摩情况下，早期碰摩在一定条件下会出现13x、23x的分频成分的结果（x表示工频）。
