Under the principle and structural characteristics, a new typeof excitation circuit is designed, which has simple structure, and also could solve switch on and off oscillation problems bothly.
This paper deals with the oscillationof the first order nonlinear neutral type functional differential equation, and obtains sufficient criterion of the equation oscillation.
本文研究一阶非线性中立型泛函微分方程的振动性。得到了该方程振动的充分性判别法则。
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Some sufficient conditions are established for the oscillationof systems of parabolic differential equations of neutral type.