This paper studies the asymptotic expression of solution of Cauchy's problem for a forth order equation when the limit equation has singularity.

本文研究当极限方程有奇性时四阶线性常微分方程的柯西问题解的渐近式。

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This paper deals with asymptotic behaviour of finite-dimensional contact elements of infinite-dimensional linear systems. In particular. the analytical expression of the asymptotic solutions is given.

本文通过简洁而又直观的方法讨论了线性情形时的有限维接触无的渐近行为，特别地，给出了渐近解的表达式。

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For a kind of population, the asymptotic best property of trimmed mean is discussed. Then, a expression of the best trimmed estimate of population parameters is given.

首先对一类总体讨论了截尾均值的渐近最优性，然后给出了更一般情形总体参数最优截尾估计的一个表达式。

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For a kind of population, the asymptotic best property of trimmed mean is discussed. Then, a expression of the best trimmed estimate of population parameters is given.

首先对一类总体讨论了截尾均值的渐近最优性，然后给出了更一般情形总体参数最优截尾估计的一个表达式。

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