查询词典 Z

Group in the periodic table there are silver-white metallic luster of the solid metal transition element, atomic number Z = 26, atomic weight of 55847, chemical symbol Fe, there is a stable F isotope 5626Fe and a radioisotope 5526Fe, content of 5% of the earth's crust, accounting for elements of in the fourth place, the metal in the second melting point 1535 ℃, boiling point 2750 ℃, the relative density of 786, the external electronic structure 3d64s2, chemical reactions 2-6 tram F-volatile son, oxidation number of 0, 2, 3, 4 , 5 and 6, the chemical nature of the metal element is very lively, in the humid air combined with oxidation, but also directly with the sulfur, phosphorus, silicon, carbon together.

周期表中Ⅷ族有银白色金属光泽的固体金属过渡元素，原子序数Z＝26，原子量55847，化学符号Fe，有一种稳定F同位素5626Fe和一种放射性同位素5526Fe，地壳中含量5％，占元素中第四位、金属中第二位熔点1535℃，沸点2750℃，相对密度786，外围电子结构3d64s2，化学反应时易丢失2—6个电F子，氧化数为0、＋2、＋3、＋4、＋5和＋6、化学性质很活泼的金属元素，在潮湿空气中能与氧化合，也能直接与硫、磷、硅、碳化合。

The reason is mainly from the distribution of π electrons of the HOMO in the plane perpendicular to the z axis.

其主要原因是HOMO的π电子分布在与z轴垂直的平面上。

In this paper, we study a class of inverse M-matrices and inverse Z-matrices of tree structure, which have much value in application and theory and matrices associated with the original matrices, for exmple Schur complements, Perron complements, ect.

第二章主要研究一类树结构逆M、逆Z矩阵，图的理论和方法被应用于矩阵结构和性质的研究，图的理论和矩阵理论有着密切的关系，并且图理论用于矩阵的研究有着直观、简洁的特点，二者的研究具有互补的关系，用图的理论和方法研究矩阵一直是矩阵理论研究的一个重要方向。

Meanwhile, we carried out the Z-scan experiments of pure CS2 to confirm the results of numerical simulation in the case of large nonlinear phase shift induced by a picosecond pulsed laser.

随着透过光阑孔径的增加，Z扫描曲线峰的变化要明显快于谷的变化，而且在谷明显存在的情况下，峰很快消失。

The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, and the near clipping plane of the projection as the location of the texture image, which can be thought of as printed on a transparent film.

模型/视图变换的作用和它在OpenGL 观察管道里的作用是一样的，它将观察者沿-Z方向移动到原点和投影中心，在这种情况下，观察者就好比是是光源，近裁剪平面好比是需要投影的纹理图象的所处的位置，纹理图象可以被看作一个在投影的透明胶片。

The modelview transform is used in the same way as it is in the OpenGL viewing pipeline, to move the viewer to the origin and the projection centered along the negative z axis. In this case, viewer can be thought of a light source, an d the near clipping plane of the projection as the location of the texture ima ge, which can be thought of as printed on a transparent film.

模型/视图变换的作用和它在OpenGL 观察管道里的作用是一样的，它将观察者沿-Z方向移动到原点和投影中心，在这种情况下，观察者就好比是是光源，近裁剪平面好比是需要投影的纹理图象的所处的位置，纹理图象可以被看作一个在投影的透明胶片。

Point P'' is the intersection point of the concave area 11 with the cross-sectional plane of symmetry Y parallel to the reference axes y and z.

点P，为凹入区域11与平行于参考轴y和z的横截对称面Y的交点。

Because the optical system of optical characteristics and the nature of the launch of the optical microscope is not the true meaning of the linear shift-invariant systems, the PSF is usually perpendicular to the optical axis in the xy plane was the distribution of radial symmetry, but the direction along the z axis significant expansion.

因为光学系统的特点和发射光的性质决定了光学显微镜不是真正意义上的线性移不变系统，所以PSF通常在垂直于光轴的x-y平面上呈径向对称分布，但沿z光轴方向具有明显的扩展。

Measurement data used poisson distribution of z test.

计量资料采用Poisson分布Z检验。

In order to improve the frequency resolution, realize high precision frequency estimation, this thesis proposes the high resolution polynomial Wigner-Ville distribution using Chirp-Z transform, the validity of this algorithm is verified using synthesized data.

为了提高基于FFT的谱分析算法的分辨率，实现高精度的频率估计，提出了利用Chirp-Z变换的频率高分辨多项式Wigner-ville分布，并用合成的仿真数据，验证了上述算法的有效性和正确性。

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％。