数值常数

Solar constant ; surface temperature ; numerical experiment ; global warming

太阳常数；地表温度；数值实验；全球增暖

Through detailed calculation and analysis of the dispersion characteristic of the noble metals like Au and Ag, we found that the group velocity combined with the group refractive index can change from negative to positive with increase of the photons energy in the visible Drude region and has the spectral property which is in agreement with the experimental results obtained in this work.

通过对贵金属Au和Ag的光学常数的色散特性分析和数值计算，发现在可见光的Drude光谱区，表征光子能量传播方向的群速度和群折射率的值会随光子能量的增大而发生从负到正的改变，这与本论文研究的实验测量和观察结果相符合。

It is pointed out, that if the vector and pseudo-vector coupling in the universal Fermi weak interaction propo...

指出假使在重正化以后矢量耦合和赝矢量耦合常数不再相等，那末不对称因子的数值可能有相当大的改变。

The astringency, error and stability of the numerical method are researched. Zero matrix method, constant matrix method, and Jacobian matrix method are constructed in order to improve numerical precision and efficiency.

研究了所提数值计算方法的误差、稳定性、收敛性等数学性质，在计算精度和计算效率两方面提出了一些改进措施，构造了零矩阵法、常数矩阵法、雅可比矩阵法等计算格式。

The LBM is believed to be an efficient way to investigate the conductivity and the dielectric constant for the agreement between the simulation of the conductivity of AlBi alloy, the dielectric constant of saturated rock and laboratory experiments of them.

对AlBi合金整体电导率的数值模拟结果和实验结果非常相近。对饱和水岩石的介电常数的计算与实验结果相比误差较小。格子玻耳兹曼方法为混合物的整体电导率的计算提供了一个有效的途径。

The results showed:there were some differences in phase structure,composition and morphology for the films synthesized at different sulphurization temperatures and time;the films sulphurized at a temperature of 240 ℃ for 45 min were polycrystalline SnS films with orthorhombic structure.

当硫化温度为240 ℃、硫化时间为45 min时，所制得的薄膜为正交结构的SnS多晶薄膜，其均匀性、致密性以及对基片的附着力都较好，具有(111)方向优先生长，薄膜粒径在200～800 nm，且晶格常数与标样的数值吻合很好。

The known constant values in these areas may be used in the program for computation, thus thwarting accurate analysis.

这些区域中已知的常数数值可被用于程序中的计算，以此阻挠正确分析。

The model predictions agree well with the available correlations obtained numerically and experimentally, they are expressed as a function of porosity with no empirical constant, and they are helpful for understanding the physical mechanism for tortuosity of flow paths in porous media.

本模型与实验数据和数值模拟结果均吻合很好，且迂曲度仅仅是孔隙率的函数，没有经验常数，因而有助于人们理解多孔介质中弯曲流线迂曲度的物理机理。

The results indicated that the dopings of appropriate amount of rare earth ions improved the dielectric constants, where the optimal doping concentratrations of Er3+ and Eu3+ ions were around 4.5% and 5.7%, respectively.

结果表明，稀土离子的适量掺杂使BST薄膜介电常数有所提高，其中， Er3+和Eu3+的最佳掺杂浓度分别为4.5%及5.7%左右时，介电常数值达到最高。

The application of the modified Rytov's method to the study of the optical-wave oblique propagation is discussed in this paper. The fluctuation index of the plane wave and the spherical wave is obtained.

将修正的Rytov方法推广应用于研究斜程传输问题，推导了平面波和球面波斜程传输时的闪烁指数，并根据ITU-R湍流大气结构模型，对平面波和球面波在不同传播高度、近地面风速、近地面大气结构常数、零内尺度以及非零内尺度下的闪烁指数进行了理论据导，做出了具体的数值分析。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。