• 就是,这个向量等价于,原点指向给定位置向量所以是以原点为心外辐射的。

    Well, , see, that is a vector field that is equal to the vector from the origin to the point where I am, so it is pointing radially away from the origin.

    youdao

  • 本文研究平面多项式向量场全局局部分叉,旨在研究平面非线性动力系统极限存在性以及极限环的个数及其相对位置关系;

    The main aim of this dissertation is to study the exist of limit cycles of plane nonlinear dynamic system of high degree and the number and the configurations of limit cycles.

    youdao

  • 本文研究平面多项式向量场全局局部分叉,旨在研究平面非线性动力系统极限存在性以及极限环的个数及其相对位置关系;

    The main aim of this dissertation is to study the exist of limit cycles of plane nonlinear dynamic system of high degree and the number and the configurations of limit cycles.

    youdao

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