查询词典 Poisson bracket

We have also studied the hydrodynamics of the nuclear matter with spontaneous chiral symmetry breaking based on the Poisson bracket method. The effects of mass are included and the full hydrodynamic equation of pion is given. The possibility of the phase transition to pion condensation is also discussed.

在研究具有手征对称性自发破缺的核物质系统的流体动力学时，我们运用Poisson括号方法，建立了pion介子的完整的流体动力学方程，给出了色散关系并讨论了相变和pion凝聚的可能性。

ABSTRACT This dissertation is devoted to studying the numerical methods for the forced Birkhoff systems with general symplectic geometric structure or Poisson bracket, including higher dimensional Birkhoff systems with multi-symplectic structure.

这篇文章着重研究一般辛结构下受到外力作用的Birkhoff系统的几何结构和几何算法，包括定义高维Birkhoff系统的概念，和研究它的多辛几何和多辛变分积分子。

These are Parentheses, Square bracket s, Angle bracket s and Brace.

括号有小括号、中括号、角括号和大括号。

Feeding can, output can and etching gas transmission system are connected on the reaction chamber, plate type positive and negative electrodes installed in parallel in the reaction chamber, with the negative pole connected with the water cooling device that connected with seal wave tube and the bottom of the reaction chamber actively, bottom of the water cooling device connecting with the vibrating source through vibrating shift lever, with the seal wave tube, vibrating shift lever and vibrating source on the bottom bracket that fastened to the bottom and installed on the oblique angle adjusting bracket.

本发明反应室上连接投料罐、出料罐和刻蚀气体输送系统，反应室内平行装有板式阳极和阴极，阴极与水冷装置连接，水冷装置通过密封波纹管与反应室底部活动连接，水冷装置底端通过振动转换杆连接振动源；密封波纹管、振动转换杆和振动源位于底架上，底架与反应室底部固定连接并安装于倾角调整支架上。

The transverse dynamic stiffness curves of front shaft bracket and back shaft bracket of a ship were obtained by means of experiments.

得到了前尾轴架和后尾轴架的横向动刚度曲线。

In the paper, the transverse dynamic stiffness curves of front shaft bracket and back shaft bracket of a ship were obtained by means of experiments.

采用实验方法对某舰尾轴架进行动刚度测量，得到了前尾轴架和后尾轴架的横向动刚度曲线。

The transverse dynamic stiffness curve of a ship front shaft bracket ,and the transverse and longitudinal dynamic stiffness cruves of a back shaft bracket are obtained by means of experiment measurements.

采用实验方法对某舰尾轴架进行动刚度测量，得到了前尾轴架的横向动刚度曲线，后尾轴架的横向和纵向动刚度曲线；分析尾轴架的动刚度曲线，可得到尾轴架结构的固有频率。

The transverse dynamic stiffness curve of a ship front shaft bracket,and the transverse and longitudinal dynamic stiffness cruves of a back shaft bracket are obtained by means of experiment measurements.Analyses of these curves make the natural frequencies of the shaft brackets available.

采用实验方法对某舰尾轴架进行动刚度测量，得到了前尾轴架的横向动刚度曲线，后尾轴架的横向和纵向动刚度曲线；分析尾轴架的动刚度曲线，可得到尾轴架结构的固有频率。

Methods Portable bracket of lower limb is composed of two fir panels and support structure. The level of support and the knee flexion is controlled with it. It is used in preoperative high-pressure disinfection, and then trouble limb is placed on the bracket to complete operation of tibia interlocking intramedullary nail.

便携式下肢手术支架由组合在一起的2块彩木板和支撑结构组成，可调节支架的高低和所需要的膝关节屈曲角度；术前高压消毒，术时展开将患肢放在上方，完成胫骨交锁髓内钉手术。

In section 1.1. we define the mapping a on circle in double quiver Q of a quiver Q, and give a strict defition of bracket operation in Lie algebra,then prove it is a Lie bracket.

循环上的映射σ，用它给出了项链李代数括号运算的一个严格定义，并用此定义证明了这是一个李运算。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。