The test results show that the porosity of sandstone decrease with the increasing effective stress at the fixed temperature level, following the law of 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；
The porosity test for sandstone was conducted at various temperature level and various effective stress level.
在不同温度水平和不同有效应力水平下，进行了砂岩的孔隙度试验。
The temperature characteristic of the effective mass are discussed in detail at different approximation calculation level.
详细讨论了在不同的近似计算程度情况下有效质量的温度特性。
The temperature characteristic of the effective mass are discussed in detail at different approximation calculation level.
详细讨论了在不同的近似计算程度情况下有效质量的温度特性。
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