在普通逻辑的教学中,经常有学生问到这么一个问题:运用换质位法,经过戾换,结果从前提 SAP 推出了(?)P 的结论,其中P 在 SAP 中不周延,而在(?)P 中却周延了,这不是违反了换位法的规则吗?我们现行的普通逻辑教材,对这个问题一般都避而不谈...在普通逻辑的教学中,经常有学生问到这么一个问题:运用换质位法,经过戾换,结果从前提 SAP 推出了(?)P 的结论,其中P 在 SAP 中不周延,而在(?)P 中却周延了,这不是违反了换位法的规则吗?我们现行的普通逻辑教材,对这个问题一般都避而不谈,这给教学带来了一定的困难。本文想通过分析为什么 SAP 经过连续换质位,所获得的结论与换位法的规则有矛盾,来说明普通逻辑教学改革的必要性及改革的方向。展开更多
Geothermal water of Xi＇an and Xianyang in the central Guanzhong basin is typically geopressured thermal water in China. 5180 and 5D data of geopressured thermal water＇in Xi＇an and Xianyang, combined with data from ...Geothermal water of Xi＇an and Xianyang in the central Guanzhong basin is typically geopressured thermal water in China. 5180 and 5D data of geopressured thermal water＇in Xi＇an and Xianyang, combined with data from the perimeter of the basin, are analyzed to study features of hydrogen and oxygen shifts. The results show that ^18O exchange of geothermal water at the perimeter of the basin and in the non-geopressured thermal water in the center of the basin is not evident, while in most of the geopressured thermal water in the central basin, in cities such as Xi＇an and Xianyang, significant oxygen exchange had taken place as well as hydrogen exchange, suggesting that isotope exchanges would slowly move the geothermal water system towards equilibrium. Thermal water reservoirs in the central basin have passed through significant water-rock reactions. Moreover, the geothermal reservoir of Xianyang city is relatively much more enclosed than that of Xi＇an city. It has been observed that the more enclosed the geological environment of geothermal water is, the more obvious the oxygen shifts are. With the increasing of the depth, residence time, total amounts of dissolute solids and temperatures of geothermal waters, the oxygen exchange accelerates.展开更多
文摘在普通逻辑的教学中,经常有学生问到这么一个问题:运用换质位法,经过戾换,结果从前提 SAP 推出了(?)P 的结论,其中P 在 SAP 中不周延,而在(?)P 中却周延了,这不是违反了换位法的规则吗?我们现行的普通逻辑教材,对这个问题一般都避而不谈,这给教学带来了一定的困难。本文想通过分析为什么 SAP 经过连续换质位,所获得的结论与换位法的规则有矛盾,来说明普通逻辑教学改革的必要性及改革的方向。
基金Projects 1212010535416 supported by the Geological Investigation Bureau of China2005D03 by the Shaanxi Natural Science Foundation
文摘Geothermal water of Xi＇an and Xianyang in the central Guanzhong basin is typically geopressured thermal water in China. 5180 and 5D data of geopressured thermal water＇in Xi＇an and Xianyang, combined with data from the perimeter of the basin, are analyzed to study features of hydrogen and oxygen shifts. The results show that ^18O exchange of geothermal water at the perimeter of the basin and in the non-geopressured thermal water in the center of the basin is not evident, while in most of the geopressured thermal water in the central basin, in cities such as Xi＇an and Xianyang, significant oxygen exchange had taken place as well as hydrogen exchange, suggesting that isotope exchanges would slowly move the geothermal water system towards equilibrium. Thermal water reservoirs in the central basin have passed through significant water-rock reactions. Moreover, the geothermal reservoir of Xianyang city is relatively much more enclosed than that of Xi＇an city. It has been observed that the more enclosed the geological environment of geothermal water is, the more obvious the oxygen shifts are. With the increasing of the depth, residence time, total amounts of dissolute solids and temperatures of geothermal waters, the oxygen exchange accelerates.
