“phase plane”的概念、定义、翻译、参考文献-科学参考

单词	phase plane
释义	phase plane Mathematics Given a dynamical system describing the evolution of a vector x(t), the possible states of the system make up the phase space (or phase plane if it is two-dimensional). For example, with the system $\frac{d x}{d t} = x + y, \frac{d y}{d t} = 4 x + y,$ the phase plane is the xy-plane and the possible evolutions or trajectories of the system can be sketched as in the figure. This system has an unstable equilibrium at the origin. Trajectories in a phase plane
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