对称

Tube spinning with non-symmetric distribution of three rollers has special advantages in hot spinning of large-diameter tubular workpieces, but there is little information available in the literature concerning non-symmetric spinning.

三旋轮非对称强旋在大型筒形件热旋工艺中具有独特的优势，然而关于非对称强旋的研究开展较少。

The tooth spaces of the sprocket can be symmetric, asymmetric and the root surface can be relieved.

链轮的齿间可以是对称的、非对称的，并且齿根面可以减少。

Through the comparison of energy, the asymmetric solution is stable while the symmetric one is revealed unstable.

通过变形发生分岔前后的能量比较发现，分岔后的对称变形是不稳定的，而非对称变形是稳定的。

MATLAB language is used to develop the computer simulation program by means of the dynamic mathematical model of three - phase induction motors in phase quantities, The program is applied to series asymmetrical resistance starting operation process of three - phase cage - type induction motors in one phases or two phases of the stator circuit.

为了得到起动特性，根据三相异步电动机在相坐标系下的瞬态数学模型，编写计算机仿真程序，通过实例对三相笼型异步电动机的定子电路一相串联电阻以及两相串联电阻时的起动过程进行仿真计算，对仿真结果进行比较分析；用对称分量法分析定子电路一相串联电阻以及两相串联电阻时的不对称系统，初步计算起动电阻的数值，然后通过计算机仿真的调整来较准确地加以确定。

The effects of the stiffness and location of the connection to the seismic response of the structures are analyzed.

对对称双塔连体结构和非对称双塔连体结构的动力反应进行了对比研究，分析了连体设置与否对这两种结构的地震反应的影响。

The essence of agent problem is that managers may stray away from the objectives of shareholders and take advantage of the enterprises'resources to seek their own benefits due to the unbalance in terms of information, and risks, the incompleteness in terms of agreement, which all result from the separation of owner -ship and management and due to the fact that shareholders and managers have different interests.

代理问题的本质是所有权和控制权的分离所造成的信息不对称、风险不对称、契约不完全，再加上经营者的利益与股东的利益不一致，使得经营者有可能偏离股东们的目标，利用公司的资源去追求自己的私利。

By constructing different quotient spaces,using the method of symplectic geometry,the self-adjoint extensions of symmetric differential operators in the direct sum spaces for the different deficiency indices at(2,2)singular points was discussed. The classification and description of complete Lagrangian submanifold that correspond with self-adjoint domains of second order differential operators were given.

由于对称微分算子在端点处的亏指数取值情况不同，当微分算子在端点处的亏指数均取(2， 2)时，通过构造商空间，应用辛几何的方法讨论了直和空间的对称微分算子的自共轭扩张问题，并给出了与二阶微分算子自共轭域相对应的完全Lagrangian子流型的分类与描述。

The Jacobi matrix rank one update problems, given either their mix-type eigenpairs or their pricinpal submatrix and defective eigenpairs(the eigenvalues of the matrix and some elements of the corresponding eigenvectors) are also discussed.

n阶对称箭形矩阵与n阶Jacobi矩阵一样只有2n-1个非零元素，类似Jacobi矩阵逆特征值问题的提法，本文提出并讨论了六类对称箭形矩阵逆特征值问题，研究了这类矩阵的结构性质，得到了问题有解的充分必要条件及求解的数值算法和数值算例。

And many kinds of ways that any summable functions expande to FOURIER progression in symmetrical and dissymmetrical area that was defined , and

以及定义在对称和非对称区域上的任意可积函数展开成FOURIER级数的各种方法，并以典型算例说明其在数学中的应用。

The introduction of local supersymmetry on worldsheet results in the Ramond-Neveu-Schwarz model, and global supersymmetry in the ten-dimensional spacetime directly yields the Green-Schwarz superstring. The Green-Schwarz superstring theory is a covariant theory.

这两种描述方式的不同点是：Ramond-Neveu-Schwarz超弦理论在超弦的世界面引入局域的超对称，Green-Schwarz超弦理论是在十维时空中直接引入超对称，它是一个协变的理论。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。