对称

And in the second part, we consider the following four inverse eigenproblems: the reconstruction of normal five-diagonal matrix by two or three ordered eigenvalues and cor...

第二个部分则讨论四类矩阵逆特征值问题：在考虑给定的两个或三个特征值次序的情况下构造唯一的规范五对角线矩阵：由三个给定的特征值和相应特征向量来构造唯一的实对称三对角线矩阵和不可约实对称三对角线矩阵。

This paper analyzes the cause of distortion of octahedron complexes and tetrahedron complexes and states the general methods to judge the distortion .

分析了八面体配合物和四面体配合物畸变的原因，给出了判断八面体配合物和四面体配合物畸变的一般方法：配合物是否发生畸变要看中心离子电子云是否对称分布，若对称分布，就具有规则的八面体或四面体构型，否则，将会发生变形。

4 When evaporative cooling hydro-generator (generator/motor) is running off-centered instantaneously under accident condition, it shall be 20s if we multiply square of ratio between negative sequence current weightand rated current (pre-unit value) by allowed dissymmetric runtime t (I2/In)2t.

6.4蒸发冷却水轮发电机在故障情况下短时不对称运行时，应能承受的负序电流分量与额定电流之比的平方与允许不对称运行时间 t 之积(I2/In)2t 应为20s 。

Firstly, based on the basic theory of GRIN optics the optical effects of the spherical symmetry GRIN micro-sphere lens were analyzed systematically. Firstly, based on the basic theory of GRIN optics the optical effects of the spherical symmetry GRIN micro-sphere lens were analyzed systematically.

本工作从梯度折射率介质光学的基本理论出发，对球对称GRIN微球透镜的光学性能进行了系统的分析；研究了用球对称GRIN微球制作回归反射材料的可能；进而选择两种聚合物单体，采用悬浮扩散共聚法，研究制备了较大粒径的聚合物梯度折射率微球透镜。

The theory of orthogonal symmetric polynomials (Jack polynomials, Macdonald's polynomials and others) and multivariate hypergeometric functions associated to symmetric polynomials are treated.

对称的正交多项式理论（杰克多项式，麦克唐纳的多项式等）及相关的多元对称多项式超几何函数的待遇。

The study found that it is not symmetrical convex parabolic type, left and right sides are not equal to the minimum axial velocity near the rod at the minimum axial velocity is small in the different condition from water to the various solution of HPAM chroma in the vertical eccentricity annuli with wide gap at pipe.

研究发现不同介质的流体在螺旋流条件下，其在偏心环空中的轴向速度分布不是左右对称的凸抛物线型，而是中间有凹陷且左右不对称的抛物线型，其轴向速度的极值点向模拟油管内壁偏移。

In this paper,a new method of measuring the resonant frequency of the RLC parallel resonance circuit was intro- duced,which makes the asymmetric amplitude-frequency curve symmetric.

介绍了用Origin变换坐标，将不对称的RLC并联电路的幅频特性曲线对称变换，从而精确求解其共振频率的方法。

We studied that the transfer matrix ABCD theorem for the passage of paraxial rays or the optical system possessing a rotational symmetry axis can be generalized for the skew rays propagated off-axis, whether the optical system possessing rotational symmetry axis or not.

本文推广了几何光学近轴光线传输的ABCD定理，使之适用于远离光轴的空间光线的传输，无论光学系统是旋转对称的还是非旋转对称的。

The other technique was so called "Constraint Induced Movement Technique" to apply a shoe lift or wedge under the stronger limb, providing a compelled shift of the body weight onto the paretic limb to increased ability of weight bearing. This technique helps patients achieving symmetry of stance and weight bearing and overcoming the learned disuse mechanism. Therefore, the purpose of this study was to investigate the effect of 5° lateral wedge on non-paretic limb improving symmetry of stance and weight bearing for stroke patients.

另外有一种技巧和方法为强迫诱发运动，在健侧使用鞋垫，强迫病患把身体的重心移到患侧去，藉此增加患侧脚承载的能力，研究有使用加高型或外侧楔型的鞋垫，目的都是要使中风的病患能有较对称的站姿及两脚有较对称的重量承载比例，如此一来可以强迫患侧使用更多，进而克服学习废用机制，上述研究多为急性期病患的探讨且多是观察当下的影响及效果，因此我们想利用外侧楔型鞋垫的帮助，藉由在健侧脚较长时间的穿著，看看对於慢性中风病患的站姿控制所造成的影响。

In Saintpaulia ionantha, actinomorphic peloria was raised in domesticated cultivation from the zygomorphic wild type.

然而，苦苣苔科的野生型园艺植物非洲堇(Saintpaulia ionantha， African violet)原本野生型的花是两侧对称，但在人择栽培后有反转为辐射对称的变异型出现，这给予我绝佳机会探讨在同一种植物中花部对称性转换的分子机制。

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％。