引力场

The gravitational fields required to make such a closed time-like curve would have to be very strong,"on the order of what you might find close to a black hole," Ori told LiveScience."We don't have any way of creating such strong gravitational fields today, and we certainly have no way of manipulating any such gravitational fields."

要制造出这样一条封闭时间曲线的引力场非得要非常强，"大约和你在一个黑洞附近找到的那么大"Ori告诉LiveScience"我们现在没有任何办法来制造这么强大的引力场，而且，可以肯定地说，我们无法来控制任何一个这样的引力场"

In this paper, the cosmography with Robertson-Walker symmetry is studied by the gravitational theory including the contribution of gravitational field and the quantum theory of gravitational field.

本文根据包含引力场贡献的引力场理论及其引力场量子化理论，研究了具有Robertson-Walker对称性的宇宙学。

Review Landau and Hans about gravitation field energy - momentum counterfeit tensor is stated, how to rely on equivalent principle in order to clarify to come the energy of field of hunting pure gravitation - momentum is stated.

重温Landau和Hans有关引力场能量-动量赝张量表述，以阐明如何依靠等效原理来探求纯引力场的能量-动量表述。

Potential function in gravitational field is solved through the equation and basic characteristics of gravitational field are studied.

通过方程，求出了引力场中的势函数，探讨了引力场的基本性质。

In this paper, from the equations of motion, we obtain the orbital and mass defect effects in the gravitational field.

中文摘要：本文从引力场中运动方程出发得到了引力场中的轨道效应和质量亏损效应。

Using the theory, we deal with some solutions about the gravitational field surrounding a static spherically symmetric mass and that surrounding a rotating mass, and the results show that some real physical singularities in their black holes can be eliminated.

理论分析表明，该理论可以消除引力场中的物理奇点，并能用标准量子场论方法使引力场量子化。

According to the similar nature of gravitational field and electrostatic field, using analogy method, the stress tensor in gravitational field is obtained from Maxwells stress tensor in electrostatic field, and the universal gravitation inside t

文摘：根据引力场和静电场的相似性质，通过类比方法由静电场的麦克斯韦应力张量得出了引力场中的应力张量，并用它计算了均质球体内部的万有引力。

According to the similar nature of gravitational field and electrostatic field, using analogy method, the stress tensor in gravitational field is obtained from Maxwells stress tensor in electrostatic field, and the universal gravitation inside the isotropic spheroid is calculated with the obtained result.

文摘：根据引力场和静电场的相似性质，通过类比方法由静电场的麦克斯韦应力张量得出了引力场中的应力张量，并用它计算了均质球体内部的万有引力。

A gravitational field equation that includes the gravitational field contribution is established by introducing the energy-momentum tensor of pure gravitational field part of matter into the general relativity theory of Einstein.

通过引进和构造具有广义协变的纯引力场能量-动量张量并引入到Einstein的场方程中，建立了包含引力场贡献的引力场方程。

In this paper, an equation descriping Proca light traveling in gravitional field is derived.

本文在导出Proca光线在引力场中的传播方程后，以球对称引力场以及平面引力波分别作为静态和动态引力场的例子，计算了有质量光子对应的光线偏折与频移。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。