The test results show that the porosity of sandstone decrease with the increasing effective stress at the fixed temperature level, following the lawof negative exponent.
试验结果表明，在温度水平一定的条件下，砂岩的孔隙度随有效应力的增加而呈负指数规律减小；
2
The model parameter of the improved exponent weighted gliding average model varies with the change of the law of the forecasted parameter.
改进后的指数加权平滑模型的参数是随着参数变化规律的变化而变化的，这种预报模型具有自适应的特点。
3
The result indicates that at certain experimental conditions, the viscosity of polymer solution will decrease with the increase of shear rate according to the rule of power lawexponent.