This manuscript is concerned with the oscillatory properties of 4th-order differential equations with variable coefficients. The main aim of this paper is the combination of the following three techniques used: the comparison method, Riccati technique and integral averaging technique. Two examples are given for applying the criteria.

中文翻译：

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一类变系数微分方程渐近性质研究的多种技术

这篇手稿涉及具有可变系数的四阶微分方程的振荡特性。本文的主要目的是结合使用的以下三种技术：比较法、Riccati 技术和积分平均技术。给出了两个应用该标准的例子。