查询词典 jacobi bracket

Using the dual characteristic pairs, we give the if and only if conditions for which a maximally isotropic subbundle of the double of a Jacobi bialgebroid is a Jacobi-Dirac structure.

在此基础上，建立Jacobi流形的两类对应约化定理，并且给出了约化Jacobi流形上的约化Jacobi结构的具体形式以及其与原流形上的Jacobi结构之间的对应关系。

Firstly, an inverse eigenvalue problem for Jacobi matrices is presented: we could construct the Jacobi matrix T if we know the spectral data: the eigenvalues of T and the eigenvalues of T_1 and of T_2, where T_1 is different to the k × k leading principal submatrix of T only at the position, while T_2 is different to the × remain submatrix only at the (1, 1) position.

首先给出的是一类Jacobi阵的逆特征值问题，即给定三组实数：一组是Jacobi阵的n个特征值，一组是只修改了最后一个对角元的它的前k阶顺序主子阵的特征值，最后一组是修改了第一个对角元的后n—k阶余子阵的特征值，用这些给定的特征值来确定相应的Jacobi矩阵。

In the third chapter,We study some geometric properties and spectral propertiesof the Jacobi operator on a solvable extension G of Heisenberg groups H.In the firstsection,we give the definition of G and some fundamental geometric properties on G.Inthe second section,we discuss the Integrability of certain subbundles and the geometricstructure of the induced foliations in case of integrability.In the third section,we studythe spectral properties of the Jacobi operator of G.

可解李群与类对称空间亦密切相关，Damcek-Ricci空间即是广义Heisenberg的一可解扩张李群，在第三章中，我们构造且研究了Heisenberg群的一可解扩张李群G的几何性质，第一节讨论了G的曲率，李指数映射，整体坐标等基本几何性质；第二章研究了TG的某些子丛的可积性及可积时诱导叶片的几何结构；第三节给出了G的Jacobi算子的特征值和相应的特征子空间。

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。

For every one of my New Year resolutions, I have been a backslider for years.

说到我的新年决心，我每年都做

With empathy and focus on a feeling level, we can all relate to the common ground of mutuality of emotions.

有了同情心和感觉上一级的重点，我们都可以涉及到相互的情感共同点。