对称

Based on the new systematic classifications of S-O positional exchange in Chinese simple sentences, this paper, from the perspective of symmetric relation of mutuality, proposes a new explanation of semantic symmetry that the subject and object in SVO structure can be exchanged if they are two things which are semantically symmetric and the common semantic element in such sentences is the mutually symmetric semantic relation.

相互关系是一种对称性关系，从这个角度入手，主宾可互易的存现句、某些表心理感知类语义的以及表分配类的句子都可纳入相互关系义句，这样主宾互易现象从相互关系这种对称性语义关系角度就有了新的解释－语义上具有对称性关系的两个事物表现在主动宾结构中的主宾位置是可以互易的，这些主宾互易句里的共同语义因素就是相互对称性关系语义。

3 Axially Symmetric Problems for Space Among spatial problems, if the elasticity body's geometric shape,restraint condition and any external factors are symmetrical in a certain axis(any plane which passes this axis is all symmetrical one),then all stresses,deformations and displacements are symmetrical in this axis.

§8-3 空间轴对称问题在空间问题中，若弹性体的几何形状，约束情况以及所受的外来因素，都对称于某一轴(通过这个轴的任一平面都是对称面)，则所有的应力，形变和位移也对称于这一轴。

In section 2,we characterize the minimal ideals of finite dimensional symmetricself-dual Lie algebras over the complex field and gives an optimistic lower bound for thedimension of the space of invariant symmetric bilinear forms on a symmetric self-dualLie algebra by means of the number of linearly independent minimal ideals.

在第二节中，我们完全刻划了有限维对称自对偶李代数的极小理想；用线性无关极小理想的个数给出了一个对称自对偶李代数上由不变对称双线性型构成的线性空间维数的最好下界

For generalization, we present the measurements under symmetrically and unsymmetrically air-supplying conditions, respectively.

为验证结果的合理性与正确性，用风速计直接测量了对称条件下的速度场，用CFD软件对对称和非对称情况分别进行了流场模拟。

A novel scheme using the Transitive Closure Graph representation is proposed to explore the symmetry solution space in the placement problem, which usually abounds in complex constraints.

提出一种新颖的使用传递闭包图的表示方法，通过TCG表达的广义对称可行性和狭义对称可行性条件，将其引申到探索解决具有高复杂限制条件，并且期望产生对称解空间的排样问题。

Result: For all of the 100 atlases samples, in 15 samples (15%) there were skew transverse processes in abscissa axis, in 5 samples (5%) asymmetry of anterior and posterior tubercles in longitudinal axis, in 10 samples (10%) asymmetry of left and right posterior arches of atlases, in 11 samples (11%) asymmetry of vertebral foramens.

结果：100例寰椎标本左右横突在横轴上偏歪者15例(15%)、前后结节在纵轴上不对称者5例(5%)、左右后弓不对称者10例(10%)、椎孔不对称者11例(11%)。

In order to obtain symmetry and parallel polarized light,the double Wollaston prism is amended. After getting symmetric polarized light at a big splitting beam angle,an ordinary triangular prism is added so that the symmetric light beam can be divided into parallel light beams.

为了获得对称且平行分束的偏振光，对双Wollaston棱镜进行了修正，在获得大分束角的对称偏振光后，配合普通玻璃三棱镜，使对称分束光变成平行分束光，通过改变三棱镜与双Wollaston棱镜间的距离来改变平行光的剪切距离。

In order to obtain symmetry and parallel polarized light, the double Wollaston prism is amended. After getting symmetric polarized light at a big splitting beam angle, an ordinary triangular prism is added so that the symmetric light beam can be divided into parallel light beams. The distance between the triangular prism and the double Wllaston prism is changed so that the distance of the shearing parallel light can be changed.

为了获得对称且平行分束的偏振光，对双wollaston棱镜进行了修正，在获得大分束角的对称偏振光后，配合普通玻璃三棱镜，使对称分束光变成平行分束光，通过改变三棱镜与双wollaston棱镜间的距离来改变平行光的剪切距离。

Tridiagonalization of symmetric matrices and computing eigenvalues of tridiagonal symmetric matrix are the keys of eigenproblem parallel solver of dense symmetric matrix.

对称矩阵三对角化和三对角对称矩阵的特征值求解是稠密对称矩阵特征问题并行求解器的关键步。

In many practice problems such as to know the resonnance frequency of a structure and to know the critical value for the stability of a dynamical system,often need to compute the eigenvalues of a symmetric matrix. The chief method to compute the eigenvalues of a symmetric matrix is first to transformate the matrix to a symmetric tridiagonal matrix similarly and orthogonally, then to use the QR method with shift to the symmetric tridiagonal matrix.

很多实际问题，如求结构振动的固有频率，动力系统稳定性的临界值等常常归结为计算对称矩阵的特征值，而首选的计算方法是先把该矩阵正交相似变换成一个对称三对角矩阵，再对这个对称三对角矩阵用带位移的QR方法。1968年J.H。

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。