对称轴

本文对一类具有对称轴的图An（n≥0），得到了它的特征多项式及匹配多项式的精确表达式；同时还得到A（？）

For a class of graphs , see Fig 1 denoted by A_n , with an axis of symmetry , we obtained its explicit expressions of characteristic polynomial and matching polynomial .

当然，前提是物体的对称轴存在。

And , of course , that only works if the solid has some axis of symmetry .

不具C2对称轴的Co（III）（Salen）催化的末端环氧化合物的水解拆分

Hydrolytic Kinetic Resolution of Racemic Terminal Epoxides Catalyzed by Co ( III )( Salen ) Possessing No C_2-Symmetry

并且，TI对称轴的空间取向和测线方位影响速度方位变化.相对于TI对称轴，速度方位变化图案不变；

The spatial orientation of TI symmetry axis and surveying line azimuth has the effect on the azimuth variation of body-wave velocities .

NH3的C3轴与p－C6H4F2的对称轴夹角是52.5°；且一个氢原子朝向环面；

The C_3 axis of NH_3 is at an angle of 52.5 ° with the Z-axis of p-C_6H_4F_2 , with one of the hydrogen atoms pointing towards the benzene ring ;

本文基于任意空间取向TI介质中坐标变换的方法，扩展研究了任意强弱、具有任意空间取向对称轴的TI介质中体波相速度和群速度的方位变化；

Based on the method of coordinates transform for arbitrary spatial orientation TI media , we expanded to study the azimuth variations of body-wave phase-velocity and group-velocity for arbitrary spatial orientation TI media with arbitrary strength of anisotropy .

为克服常规弹性波动方程正演结果的局限，研究了具有垂直对称轴的横向各向同性（VTI）介质中准P波方程的数值解法。

To overcome the shortage of normal elastic wave forward modeling result , the numerical solution of quasi-P wave equations in transversely isotropic media with a vertical symmetry axis ( VTI ) was studied .

对于倾斜叠层和非垂直裂隙岩层，用具有任意空间取向对称轴的TI（ATI）模型来描述更符合实际观测。

TI medium with arbitrary spatial orientation ( ATI ) is the actual anisotropic model used to describe tilted PTL ( period thin layers ) and no vertical fractured rock .

本文对具有竖对称轴的单室六角箱粱横截面畸变γ（z）的四阶微分方程的建立，用较浅近的方法进行了推导。

In this paper a less complicated method is proposed to derive a differential equation of fourth order for solving the sectional distortion γ( z ) of a single-cavity hexangular coffer beam with the vertical symmetrical axis .

研究结果表明，ATI介质中体波速度随传播方向变化的速度图案相对TI对称轴确定，此确定的速度图案与TI的Thomsen参数相关；

The result shows that patterns of body-wave velocity are fixed relative to the symmetry axis , and these fixed patterns are closely related to Thomsen 's anisotropic parameters .

应用理论模型计算方法研究了具有垂直对称轴的横向各向同性介质中P波、SV波的传播规律和Thomsen参数对P波相速度的影响。

On the basis of Thomsen 's parameters , the features of P wave and SV wave , and the effects of Thomsen 's parameters on their features are studied using theoretical models and calculation method .

在傅立叶谱中频的环上且靠近十字架附近，并以十字架的一边作为对称轴的矩形区域中嵌入水印，然后使用一个单向HASH函数来确定图像DFT变换后水印嵌入具体位置。

Watermark is embedded on the mid-frequency spectrum , and the positions are considered in a rectangle which is symmetric to one side of the cross . While the specific embed positions are determined by a one-way hash function .

研究表明，体波群速度图案和相速度图案相对TI对称轴固定，随TI对称轴倾角及其相对测线方位角的变化呈现出一定的对称性和重复性；

That is , the spatial orientation of TI symmetry axis and surveying line azimuth have an effect on body-wave velocities . The patterns of body-wave group-velocities and phase-velocities are fixed relative to TI symmetry axis and exhibit certain symmetry and repetition of azimuth variation .

在褶皱和上冲作用下，一些地层发生了倾斜，此时TI介质的对称轴不再水平或者垂直，就形成了所谓的TTI介质。

Some strata caused by folds and uprush may tilt , TI media will turn to so-called tilted transversely isotropic media ( TTI media ), for the symmetry axis of TI media is no longer horizontal or vertical .

分析发现，随着Fr数的增大，涡量减小，羽流卷吸空气的能力减弱，涡旋变化频率降低，火焰面增长并逐渐偏离对称轴，而且由于浮力减弱，羽流轴向速度呈下降趋势。

With the increasing of Froude number , vorticity , air entrainment by plume and frequency descends , flame is longer and deviates from axis gradually . Besides axial velocity of plume also decreases for buoyancy attenuation .

具有垂直对称轴的横向各向同性介质模型（VTI）是目前各向异性理论研究和多波多分量地震资料叠前成像处理中最常用的一种各向异性模型。

Transverse isotropy ( TI ) with a vertical symmetry axis ( VTI ) is the most common model for academic research on anisotropy and prestack imaging of multi-wave and multi-component reflection seismic data .

最后通过Hudson模型，对裂纹密度为0.005,0.01和0.03的模型，给出横波速度随传播方向与裂纹对称轴夹角的变化曲线。

Finally , by using Hudson cracks model for three crack densities 0.005 , 0.01 , 0.03 , the velocity curves of shear wave were plotted as a function of angle between the symmetrical axis of cracks and the azimuth of source to receiver .

正12面体框架构型（RDFC）&立方格子与五次旋转对称轴共存的几何构型

Framework configuration of a positive dodecahedron ( rdfc ) - the geometric configuration of coexisting cubic lattice and penta - rotating symmetrical axis

根据地震波在具有垂直对称轴的横向各向同性（VTI）介质中的运动学特征，应用传播时间反演方法，进行了水平层状VTI介质的地层弹性参数反演方法研究。

In this paper , seismic inversion of elastic parameters in horizontally layered VTI ( transverse isotropy media with vertical symmetry axis ) is well studied , on the basis of seismic wave kinematics theories in transverse isotropic media with vertical symmetry axis .

试样通常不会沿对称轴劈裂，试验机是位移控制加载，利用平台圆盘劈裂试验确定岩石断裂韧度KIc是困难的。

It is difficult to determine the fracture toughness KIc of rock from the Brazilian test with the flattened disk specimen , for the disk does not crack along the symmetric line and the loading method of testing machine is controlled by compression deformation .

本文根据VTI（具有垂直对称轴的横向各向同性）介质中地震波的运动学特征，应用射线追踪方法，计算了VTI介质中的地震波的旅行时，并合成了反射波地震记录。

In this paper , according to the characteristics of seismic wave in VTI ( Transverse isotropy media with vertical symmetry axis ) media , we calculate the travel time of seismic wave in VTI , and synthesize the reflective seismic wave record by using ray trace method .

具有倾斜对称轴的横向各向同性介质中的弹性波

Elastic wave in transverse isotropic media with dipping symmetric axis

核对称轴不同相对取向对熔合动力学的影响

The influence of nuclear orient at ion in fusion dynamics

已知一条对称轴的一般二次曲面讨论

On General Quadratic Surface with a Given Symmetrical Axis

抛物线电流对称轴上的磁场

The Mathematical Expression of Magnetic Field in the Symmetric Axis of Parabolic Current

绕对称轴转动的均匀带电薄圆盘的电磁辐射场

Electromagnetic Radiation Field of Evenly - charged Thin Disk Rotating Around Its Symmetry Axis

基于极小惯量的灰度图像对称轴检测方法

A Symmetry Axis Detected Method Based on the Minimal Value of Moment of Inertia

对箱形接头，应从平面两对称轴螺栓群中间顺序向轴外侧对称进行紧固。

To box joint , bolts fastness should start from symmetrical line to outside .

具有三度转动对称轴的八极形变

Octupole deformation of three fold rotational axis

利用坐标变换，导出对称轴的变换公式。

Based on the coordinate transformation , the formula of symmetry axes transformation is driven .