在这份报纸，平常的微分方程的一个古典系统被造描述一种 n 维的量系统。吸收光谱和为系统的状态的密度从量看法和古典看法的点被定......

In order to further study the dynamical behavior of nonconservative systems,we study the conserved quantities and the ad......

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The Birkhoff systems are the generalization of the Hamiltonian systems.Generalized canonical transformations are studied......

The form invariance of constrained Birkhoffian system is a kind of invariance of the constrained Birkhoffian equations u......

The theory of time scales,which unifies continuous and discrete analysis,provides a powerful mathematical tool for the s......

The Birkhoffian mechanics is more general than the Hamilton mechanics,but only some dynamical systems can be realized as......

This paper is devoted to discuss the motion of controllable constrained Birkhoffian system along with its absence of con......