简单双口网络的等效变换

计论了双口网络的等效条件，应用开路和短路等研究方法完成了简单双口网络等效变换关系的推导     

The Lie symmetrical non-Noether conserved quantity of holonomic Hamiltonian system

In this paper, we study the Lie symmetrical non-Noether conserved quantity of a holonomic Hamiltonian system under the general infinitesimal transformations of groups. Firstly, we establish the determining equations of Lie symmetry of the system. Secondly, the Lie symmetrical non-Noether conserved quantity of the system is deduced. Finally, an example is given to illustrate the application of the result.     

三相负载中点位移特性的研究

运用圆弧方程和圆图分析三相负载中点位移的特性定性讨论了中点位移的变化规律，这对加深理解中点位移和应用有参考意义。     

Noether——Lie symmetry and conserved quantities of mechanical system in phase space

In this paper, a new kind of symmetry and its conserved quantities of a mechanical system in phase space are studied. The definition of this new symmetry, i.e. a Noether--Lie symmetry, is presented, and the criterion of this symmetry is also given. The Noether conserved quantity and the generalized Hojman conserved quantity of the Noether--Lie symmetry of the system are obtained. The Noether--Lie symmetry contains the Noether symmetry and the Lie symmetry, and has more generalized significance.     

相空间中力学系统的两类Mei对称性及守恒量

研究相空间中力学系统的两类Mei对称性及守恒量，给出相空间中力学系统的两类Mei对称性的定义，得到其确定方程及守恒量，并举例说明结果的应用. 关键词： 相空间 力学系统 Mei对称性 守恒量     

变质量力学系统的一般形式的非Noether守恒量

研究一般的无限小变换下变质量力学系统Lie对称性的非Noether守恒量, 进一步推广Hojma n定理. 给出变质量力学系统的一般形式的非Noether守恒量,并举例说明结果的应用. 关键词： 变质量系统 一般的无限小变换 非Noether守恒量     

关于Lagrange系统和Hamilton系统的Mei对称性

对Lagrange 系统和Hamilton系统Mei对称性的研究表明，Mei对称性的两种表述对Lagrange系统是等价的，给出一类Mei对称性，而对Hamilton系统不等价，给出两类Mei对称性. 关键词： Lagrange系统 Hamilton系统 Mei对称性 守恒量     

简单双口网络的等效交换

讨论了双口网络的等效条件，应用开路和短路等研究方法完成了简单双口网络等效变换关系的推导。