引力

We have obtained the following main significant results:(1) A master constraint operator for LQG is constructed, which is shown to be self-adjoint in the diffeomorphism invariant Hilbert space. Thus it lays a foundation for the master contraint programme in LQG;(2) The Immirzi parameter ambiguity in LQG is fixed by introducing supersymmetry, which leads to the conclusion that in the case where matter fields are coupled LQG might prefer supersymmetry in low energy;(3) The current accelerating expansion of our universe is successfully explained in the context of 5-dimensional Brans-Dicke theory, which gives a natural strategy to solve the dark energy problem.

重要成果包括：(1)构造出圈量子引力的Master约束算符，并证明了其自伴性，从而为应用Master约束方法解决量子动力学的难题奠定了基础；(2)通过引入超对称合理地固定了Immirzi参数，得出了在与物质场耦合的低能情况下圈量子引力可能偏爱超对称的结论；(3)用五维Brans-Dicke理论成功地解释了当今宇宙的加速膨胀，从而给出了一个自然解决暗能量问题的方案。

Our primary work in this thesis is that, in view of the general holographic principle between gauge theories and gravity from string theory, we calculate the mass spectra of several typical QCD$_4$ glueballs in term of AdS$_6$ AdS-Schwarzschild black hole metric of Einstein gravity theory.

这篇毕业论文里，我们主要的工作是以弦理论中的规范理论和引力理论之间的广义全息原理为基础，根据爱因斯坦引力理论的AdS$_6$ AdS-施瓦茨黑洞度规计算了几个系列的QCD$_4$胶球质量谱。

The force of gravity on the moon is much less than on the earth .

月球的引力比地球上的引力小得多。

People weigh less on the moon because the moons force of gravity is less than that of the earth.

人在月球上重量要轻些，因为月球的引力小于地球的引力。

This would require that the number of effective degrees of freedom in quantum gravity can be reduced by a large gauge transformation; more evidence for a peculiar hidden symmetry in quantum gravity.

这将需要一些有效的自由度在量子引力可减少了大型针式转变；更多证据的特殊隐藏对称性量子引力。

The size of the Earth's gravitational attraction is based on a reference share, and the quality of the produce!

地球的引力大小是以某一引力参照物的比重、质量产生而产生的！

Because the gravitational constant and masses of objects in everyday life are very small

由于引力常量很小，我们日常接触的物体的质量又不是很大，所以我们很难感觉到物体间的引力。

Inertial mass [1] that is the size of the inertia of objects, and the gravitational mass by the gravitational force that size.

惯性质量[1]表示的是物体惯性的大小，而引力质量表示受引力的大小。

In addition, if the several factors that cause the change of mass can be counter-balanced or create the equivalent result, an object's inertial mass will be equal to its gravitational mass. For example, an object's inertial mass with high temperature and low pressure may be equal to its gravitational mass with low temperature and high pressure.

此外，如果引起质量变化的几种因素可以抵消或产生等效的结果，一个物体的惯性质量和引力质量也可以相等；例如一个物体在高温低压状态下的惯性质量和低温高压状态下的引力质量也可以相等。

This paper based on basic theory of continuum mechanics, presented the change of mass density, gravitational force and potential of deformable earth, both in the Eulerian and the Lagrangean portrait, and made some concepts on gravitational variation to clearer.

基于连续介质力学的基本理论，给出了地球密度变化、引力和引力位变化的Lagrange和Euler描述，明确了重力场变化的若干概念，它对于高精度地球重力场时空变化的理论研究具有参考价值。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了