Sixth, pre-test, analysis item differentialvalidity, 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；
2
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。
3
The validity of homogeneous balance method for solving differential equation was shown by solving a new Hamilton amplitude equation.