通过对公式的讨论，提出了灌溉水矿化度临界方程，讨论了淋洗系数和优先流系数的物理意义和影响因素。
Through discussing above formulas, the critical mineralization degree equation of irrigation water was presented. The physical significance and...
讨论了一类中立型时滞微分方程所有解的振动性，获得了临界状态下该方程所有解振动的一个充分条件。
Considering a kind of neutral delay differential equations, a sufficient condition for the oscillation of all solutions of neutral delay differential equation in critical state is obtained.
讨论了带变号扰动并且具有一定附加条件的临界椭圆方程的两个正解存在性。
This paper deals with the existence of two positive solutions for critical elliptic equations with a changed sign perturbation and with an auxiliary condition.
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