Novel mixed conducting oxides, B-site Bi-doped perovskites were exploited and synthesized. Cubic perovskite structures w......

本文就中学数学教学中,如何深化数学思想方法教学的问题进行了探讨....

从煤储层双孔隙系统出发探讨了介质对煤层气扩散运移的制约关系及程度。以沁水盆地为例，分析了孔隙系统和裂隙系统在煤层气运移过程......