真空的

Of non-zero rest mass can travel at or faster than the speed of light in vacuum.

动源是质量，物理真空在质量的挠动下引起真空的自旋纵向极化，就表现为引力场；如果

One of the major contributions of Maxwellian theory was that it set up an essential relation between the electromagnetic field and light in vacuum, and defined the speed of electromagnetic wave as the constant speed of light c , which implies a hypothesis that the rest mass of the photon should be zero exactly.

麦克斯韦电磁理论的一个重要贡献在于它将真空中的电磁场与光联系起来，并将电磁场的传播速度定义为真空的属性，即恒定的光速 c ，因而建立了电磁波与光之间的本质联系。

In the space of relative vacuum, the wave of gravitation of produce the connection of gravitation of at the mutuality of each quantum spatial measurement, in the crooked space of relative vacuum the mark of path also is crooked mark, make the mark of path quantum spatial measurement also come to do curve, cosmic energy not can leave the space of cosmic time-space.

在相对真空空间中，在各宇称量子之间产生引力关联的引力波，在相对真空的弯曲空间中的径迹也是曲线，使宇称量子的径迹也成曲线，宇宙能量逃逸不了宇宙时空空间。

From our result, we can see that unphysical components of the gauge fields are contributive to the vacuum energy and it just cancel out ghost fields contribution to the vacuum energy.

从计算结果来看，规范场的物理分量和非物理分量对真空的零点能都有贡献，而规范场的非物理分量对真空能量的贡献，不仅不包含M-C-S规范场的质量项，而且恰好与鬼场的贡献相抵消。

It is shown that when the Casimir force of M-C-S gauge field is calculated, the ghost contribution to the vacuum energy must be taken into consideration in U (1) covariant gauge theory, although the ghost decouples from the gauge.

这表明，即使在U（1）情况下，鬼场与规范场无耦合，在讨论真空的零点能时，鬼场的贡献是必须计入的。只有这样才能抵消非物理分量对真空能量的贡献，获得正确的结果。

The existing determining method of the optimum vacuum of condenser is only fit for the condition of that condenser is clean in tubes and vacuum system tightness is up to standard or the performance of air ejector is normal.

现有的凝汽器最佳真空的确定方法只适用于凝汽器水侧管壁清洁、汽轮机真空系统严密性正常或抽气设备运行性能正常的工况。

The result is that the getter absorbs any last remaining traces of gas inside the vacuum tube and increases the purity of the vacuum.

其结果是，吸收的getter最后剩下的任何痕迹的提嗷气管内的真空，增加了真空的纯洁性。

This invention relates to a method and device for generating cold atomic beam. Said method includes heating hot atom source in vacuum chamber to form atomic saturated vapor pressure atmosphere, cooling hot atom by three-D MOT to below 200uk and trapped to form cold atomic cloud, by the quarter wave plate reflection mirror in MOT the laser radiation pressure being unbalanced to make cold atom emitting along said direction, four tape arranged straight line set with contrary current direction is set in atom beam emission direction, which makes the atom emitted to forward to obtain cold atom beam with low speed, large flux and small transverse speed, laser beam vertical with atom beam set in the direction of cold atom emitting for atom beam state preparation to realize state concordant emitted cold atom beam.

本发明涉及一种冷原子束产生方法和装置，该方法包括在抽真空的真空室内，加热热原子源，在真空室中形成相应的原子饱和蒸汽压气氛；采用三维MOT对热原子进行冷却，冷却到200μk以下，并被捕获形成冷原子云团；通过三维MOT中开小孔的四分之一波片反射镜，而使得在该方向上激光辐射压力不平衡，使冷原子沿此方向出射；在冷原子束出射方向上，还置有载有彼此电流方向相反的四根成锥形排列的直导线，从而原子出射时将在磁场的作用下，不会沿横向膨胀而向前射出；便得到了出射速度低的、通量较大的、横向速度非常小的连续冷原子束；同时在冷原子束的出射方向上，设置有与原子束垂直的激光束，用于原子束的态制备，实现态一致的出射冷原子束。

The vacuum obtains and maintenance is still still the main problem in the field of MEMS vacuum packaging technology.

真空的获得和维持是目前MEMS 真空封装技术中存在的主要难题之一。

With the established model, the optimization model of condenser is proposed to determine the best vacuum value of condenser and energy loss resulted by deviation of some main operation parameters, reduce the energy loss by optimize the controllable parameters.

在此基础上，建立发电功率与凝汽器真空的优化模型，确定热力系统各主要参数对汽轮机功率的影响以及凝汽器真空的运行应达值，以机组的最优运行为目标，优化可控参数，达到降低能耗的目的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。