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在柱状边界条件下将对柱侧面的曲面积分表示成一维积分,同时还给出了椭圆积分的计算方法,由对空间立体角积分的算例可知,其计算的速度有了显着的提高。 相似文献
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对于那些由代数微分方程描述的具有输入输出关系的非线性控制系统,本文采用两种方法讨论了其最小实现问题:一种方法是直接计算系统的特征列;另一种方法则采用了本原元定理.两种方法给出的最小实现所需的状态变量最小数目是相等的.文中的大量代数与微分运算则可利用数学机械化来完成 相似文献
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The thermokinetics of the formation reactions of cerium(III) n-dodecylbenzene sulfonate and cerium(III) stearate are studied by using a microcalorimeter. On the basis of experimental and
calculated results, three thermodynamics parameters (the activation enthalpies, the activation entropies, the activation free
energies), the rate constant, three kinetic parameters (the activation energies, the pre-exponential constant and the reaction
order) and the enthalpies of the reaction of preparing cerium(III) n-dodecylbenzene sulfonate in the temperature range of
20–35°C and cerium(III) stearate in the temperature range of44.6–62.8°C are obtained. The results showed that the title reactions
easily took place in the studied temperature.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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用参数变换方法,研究了位形配分函数对体积的一次导数,得到了第二位力系数,从而证明了第二位力系数与体积无关,并对现有教材所给出的条件加以补充。 相似文献
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