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.
本文主要利用拓扑度理论中的不动点定理和变分方法中的极小作用原理及其环绕形式的临界点定理在适当的条件下讨论了一类二阶椭圆边值问题的可解性。
The aim of this thesis is to study the existence of weak solutions for semilinear second order elliptic boundary value problems under suitable conditions through topological and variational methods.
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.
研究了水乳性聚氨酯涂饰剂涂膜的基本组成，确定了涂膜在不同条件下的CPMC(临界颜料质量浓度)。
In order to gain the different component data for CPMC (critical pigment mass concentration) of the polyurethane, which was made up of resin and pigment, systematic experiments were carried out.
为了预测可靠性，一个可靠的阀门设计必须通过临界操作条件下的应力分析和功能合格测试。
In order to predict reliability, a sound valve design must be backed up up by a stress analysis and functional qualification testing under critical operating conditions.
分析了超临界锅炉吹管过程中受热面超温现象的危险性及原因，根据现场条件提出了有效的解决措施。
The article analyzes the harmfulness and reasons on over-temperature of heating surface in blowpipe, and proposes the effective measures.
运用改进的集中列紧原理证明了在某些指数条件下非奇对称的临界非线性项仍能保证无穷多弱解的存在性。
The problem involves non-odd symmetric critical nonlinearity. Existence of infinitely many solutions of this problem is obtained with improved Compactness- Concentration principle.
运用改进的集中列紧原理证明了在某些指数条件下非奇对称的临界非线性项仍能保证无穷多弱解的存在性。
The problem involves non-odd symmetric critical nonlinearity. Existence of infinitely many solutions of this problem is obtained with improved Compactness- Concentration principle.
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