张量

The second part is for the calculation of the mass spectrum for two-gluon glueballs by using Bethe-Salpeter equation. Our results are in good agreement with those given by lattice simulation and confirm that the lightest glueball is scalar with mass about 1. 7GeV, the mass of tensor glueball is about 2. 4GeV, the masses of pseudoscalar glueball and 2〓 not less than 2. 0GeV.

二是利用Bethe-Salpeter方程计算了双胶子胶球的质量谱，结果与最近的格点规范计算符合得很好，进一步肯定了标量胶球是最轻的胶球，质量约为1.7GeV；张量胶球的质量约为2.4GeV；而赝标胶球和胶球2〓的质量不小于2.0GeV。

A method is proposed to calculate these features from a general quadric surface fitted at each point.

本文提出了一种从散乱坐标点拟合一般二次曲面，然后估计曲率张量的方法。

The definitions of the relative derivatives of a tensor with respect to time in any reference frame by using the notation of vectrix were proposed.

提出了用矢阵表示的张量对时间的相对导数的概念。

It was shown that with the help of vectrix one can treat the relative derivatives of a tensor more clearly and more rigorously when multiple reference frames were concerned.

研究表明，通过借助于矢阵概念，在涉及多个坐标系时，张量的相对导数得到了更加清晰和严格地描述。

The FDTD with shift operator formulations are derived based on the relative permeability tensor in magnetized ferrite and Maxwell curl equations of anisotropic media.

从磁化铁氧体的相对磁导系数张量和各向异性情形下Maxwell旋度方程出发，推导出外磁场沿任意方向情形下磁化铁氧体电磁散射的SO-FDTD迭代公式。

Theory of representation for tensor functions is introduced concisely in this paper , and a new strength criteria in the plain woven composites is derivated by this theory.

简单的介绍了张量函数表示理论，在该理论的基础上提出了一种新的适用于平面正交机织复合材料的强度准则。

A theorem on natural equivalences between a right exact additive functor F which preserves sums and some tensor functor ?

给出了函子范畴中任意右正合保直和可加函子F与张量函子B自然等价的一个定理。

The method and principle of variable angle sample spinning NMR were introduced. In presence of both quadrupole and chemical shift interactions, VASS NMR computer simulation was performed.

2介绍了变角样品旋转NMR方法和原理，及解决同时考虑半整数四极核四极作用和化学位移作用以及两种作用张量主轴不重合情况下的VASS NMR拟谱问题。

The space-like hypersurfaces with constant scalar curvature in a de Sitter space were studied and a pinching theorem on the square of the norm of the second fundamental form was obtained.

研究de Sitter空间中具有常数量曲率的类空超曲面，将Cheng-Yau的自共轨运算元口作用在对称张量T上，得到了这类超曲面关於第二基本形式模长平方的一个拼挤定理，加强了已有的相应结果。

We revisted the process B→η＇K and got the same result as the previous literature that the experient data is 2-4 times larger than the theoretical calculation We calculated the matrix element of scalar and tensor operators, which can be applied in some models beyond Stand Models, such as Minimal Super-Symmetry Models.

我们还在BBNS因子化方案下计算了某些新的算符，例如标量算符，张量算符等的强子矩阵元，这一结果可以应用到标准模型扩展如最小超对称模型中，计算新物理的贡献。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。