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二氧化碳同位素高温转动配分函数研究 被引量:1
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作者 王君 齐建起 +1 位作者 方敏 宋晓书 《四川理工学院学报(自然科学版)》 CAS 2008年第5期111-113,共3页
在5K~6000K温度范围内,分别采用了直和法和McDowell的解析式法计算了12C16O2,16O13C17O,17O13C17O,17O13C18O四种二氧化碳的同位素的转动配分函数,通过对两种方法所得的数据结果进行分析,在5K~3000K温度范围,两者结果符合得很好,而在3... 在5K~6000K温度范围内,分别采用了直和法和McDowell的解析式法计算了12C16O2,16O13C17O,17O13C17O,17O13C18O四种二氧化碳的同位素的转动配分函数,通过对两种方法所得的数据结果进行分析,在5K~3000K温度范围,两者结果符合得很好,而在3000K~6000K温度范围内,对我们讨论的分子来说,对转动配分函数的计算采用解析式法更为适用。 展开更多
关键词 二氧化碳同位素 总内配分函数 转动配分函数 直和法 解析式
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Symmetry Reductions and Group-Invariant Solutions of (2+1)-Dimensional Caudrey-Dodd-Gibbon-Kotera-Sawada Equation 被引量:2
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作者 吕娜 梅建琴 张鸿庆 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第4期591-595,共5页
With the aid of symbolic computation, we present the symmetry transformations of the (2+1)-dimensionalCaudrey-Dodd Gibbon-Kotera-Sawada equation with Lou's direct method that is based on Lax pairs. Moreover, witht... With the aid of symbolic computation, we present the symmetry transformations of the (2+1)-dimensionalCaudrey-Dodd Gibbon-Kotera-Sawada equation with Lou's direct method that is based on Lax pairs. Moreover, withthe symmetry transformations we obtain the Lie point symmetries of the CDGKS equation, and reduce the equation withthe obtained symmetries. As a result, three independent reductions are presented and some group-invariant solutions ofthe equation are given. 展开更多
关键词 symmetry reduction Caudrey-Dodd-Gibbon-Kotera-Sawada equation Lou's direct method group-invariant solution
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Correlations between direct and indirect strength test methods 被引量:3
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作者 Kallu Raj Roghanchi Pedram 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第3期355-360,共6页
The difficulties associated with performing direct compression strength tests on rocks lead to the development of indirect test methods for the rock strength assessment. Indirect test methods are simple, more economic... The difficulties associated with performing direct compression strength tests on rocks lead to the development of indirect test methods for the rock strength assessment. Indirect test methods are simple, more economical, less time-consuming, and easily adaptable to the field. The main aim of this study was to derive correlations between direct and indirect test methods for basalt and rhyolite rock types from Carlin trend deposits in Nevada. In the destructive methods, point load index, block punch index, and splitting tensile strength tests are performed. In the non-destructive methods, Schmidt hammer and ultrasonic pulse velocity tests are performed. Correlations between the direct and indirect compression strength tests are developed using linear and nonlinear regression analysis methods. The results show that the splitting tensile strength has the best correlation with the uniaxial compression strength.Furthermore, the Poisson's ratio has no correlation with any of the direct and indirect test results. 展开更多
关键词 Uniaxial compression strength test Indirect strength test methods Correlation Regression analysis
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