对称中心

The hexapod stiffness, which is moveable platform stiffness relative to fixed base frame, generally, is a non-symmetric matrix. It can map the infinitesimal increments in the displacement and in the applied forces , representing the characteristics of forces/displacements in incremental form and relating to machine head displacements when subjects to externally applied force system. It is no doubt that the displacements will affect machine accuracy, especially with the tool under changeable load system.

六杆机构加工中心的刚度意味着输出端移动平台相对于固定基础平台的刚度，一般地，它是一个非对称的刚度矩阵，它将位移微小增量转换成微小力增量，表现了增量形式的力/位特征，关系到机床加工头受有外载荷系统时的位移，直接影响到加工精度，特别是变载荷系统下的加工精度。

If the sample is insulant, it is possibleto reach zero temperature difference sintering with zero heat release rate.

重点分析了径向温度分布问题，样品内对称面上任一点与样品中心的温差为：△T=〓。

Main research results are as follows:The distribution of electromagnetic field in inductor goes sameness when imposing high frequency magnetic field and intermediate frequency magnetic field where the magnetic flux density is symmetry along the center of inductor height and in which the distance from the center of inductor is further, the magnetic flux density is stronger.

主要结论如下：感应器通入高频电流和中频电流两种情况下，感应器内部的磁场分布趋势相同，感应器内部的磁感应强度沿感应器高度中心对称，半径越大的位置，磁感应强度越强。

In addition, by applying the quotient singular value decomposition of a matrix pair, we obtained a general expression of the least-squares solutions of the matrix equation A~TXA — B on the linear manifold.

在第四章，我们研究了线性流形S={X∈CSR~|‖XY-Z‖=min，Y，Z∈R~}上矩阵方程A~TXA=B的中心对称解。

In Chapter 4, the centro-symmetric solutions of matrix equation A~TXA = B on the linear manifold S ={X ∈ CSR~|||XY - Z||= min, Y,Z ∈ R~|}, using the quotient singular value decomposition of matrix pairs, the necessary and sufficient conditions for the existence and the expressions for the centro-symmetric solutions of matrix equation A~TXA = B on the linear manifold are established.

利用矩阵对的商奇异值分解，给出了这类线性流形上矩阵方程A~TXA=B存在中心对称解的充要条件及其通解表达式。

Instead it is lopsided with twice as much on one side of the galactic centre as the other.

取而代之的是不对称，银河中心一侧是另一侧的两倍。

In this paper,an iterative method is constructed to find the centrosymmetric solution of matrix equation where is real matrix pair .

本文构造了一种迭代法求矩阵方程的中心对称解对。

Beijing axis is the axis of the Ming and Qing Beijing, the Beijing Urban Planning to have a symmetrical Miyagi as the central feature of many buildings built on the symmetry axis, known as the axis.

北京中轴线是指明清北京城的中轴线，北京的城市规划具有以宫城为中心左右对称的特点，很多建筑都建筑在对称轴上，称为中轴线。

But since there is a Limit, it is complete on every side, like the mass of a well-rounded sphere, equally balanced from its centre in every direction; for it is not bound to be at all either greater or less in this direction or that; nor is there Not-Being which could check it from reaching to the same point, nor is it possible for Being to be more in this direction, less in that, than Being, because it is an inviolate whole.

然而，由于存在空间的限制，存在在各个侧面都是完整的，就象一个很圆的球体，在各个方向上相对于中心都是对称的，因为它不可能在一个方向上小另一个方向上大；没有非存在阻止它达到同一点，存在在某一方向上多而在另一方向上少是不可能的，因为它是不可玷污的整体。

For a given level of asymmetry, the critical off-center of the strip increases with increase in entry tension.

对于给定水平的不对称，关键离中心地带的增加而增加进入紧张状态。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。