Sixth, pre-test, analysis item differential validity, test reliability and validity, then amend the test.

预试，依据测验的项目区分度、信度和效度评价结果修改测验；

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And then, the uniform validity of solution is proved and the uniform valid asymptotic expansions of arbitrary order are obtained by using the theories of differential inequalities.

然后，运用微分不等式理论，证明了形式渐近解的一致有效性，并得出了解得任意阶的一致有效展开式。

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The validity of homogeneous balance method for solving differential equation was shown by solving a new Hamilton amplitude equation.

本文用齐次平衡方法求出了哈密顿振幅方程的精确解。

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