本文推导了使用常单元和线性单元时矩阵元素的解析表还式，从而避免了数值积分。
This paper derives the analytical formulas for elements of the matrices using constant and linear elements Therefore, the numerical integral can be avoided.
根据气体状态方程和平衡方程，推导出在某点真空表反映的真空度值与孔压计反映的孔压差的理论关系式。
The theoretical formula about vacuity in vacuum tube and pore-water pressure at the observation point was obtained in this paper by using equation of gas state and equilibrium equation.
在合理假定涉及要素的基础上，利用生命表中的死亡概率，通过推导出的关系式计算两种市场下参与抵押房产的老人能获得贷款的数额。
With reasonable assumptions of the factors related, we use equation derivated to calculate the loan amount in these two markets based on the use of life table probabilities of death.
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