真空

Although it is possible that new attempts to estimate the vacuum energy density may yield just the right amount to explain cosmic acceleration, many theorists believe that a correct calculation, incorporating a new symmetry principle, will lead to the conclusion that the energy associated with the quantum vacuum is zero.

虽然新的估算有可能得到能解释加速膨胀现象的真空能量密度，但多数科学家相信，经过正确的计算再配上新的对称性原理，得到的量子真空能量将会是零。

It is found that amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing can be created by 4-photon unitary operator S4 acting on the vacuum state and this shows that the amplitude-squared squeezing is a new nonclassical effect of light field which is independent of the second order squeezing, antibunching and sub-poisson statistics.

发现4个光子么正算符S4对真空态的作用可以产生振幅平方压缩，这表明振幅平方压缩是一种独立于二阶压缩、反聚束以及亚泊松统计分布的新的光场非经典效应。标签 K光子么正算符相干态真空态振幅平方压缩 K-photon unitary operator coherent state vacuum state amplitudesquared squeezing

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。

Then the author is able to define thespace of covacuaand thespace of vacua in the same way as in the untwisted case.

这样，作者将给出扭真空空间和扭余真空空间的概念，其定义类似于非扭的情形。

Connect the vacuum pump with canned bottle and then vacuumize for about 5minutes.

给罐装瓶抽真空，用抽真空泵给罐装瓶抽真空5 分钟以上。

Metal vacuum cleaning tools and static-dissipative vacuum hose.

金属真空清洁工具和静电耗散真空软管。

Company not only has the high-volume processing capacity, is that it can be more difficult to bear all kinds of vacuum coating and ion implantation technology development, and provide technology transfer and technical services such as full-service The company has advanced three vacuum equipment, ultrasonic cleaning equipment, deionized water equipment related production equipment, fully meet the customer's production requirements.

公司不仅具有大批量加工生产能力，更主要的是能承担各类高难度的真空镀膜及离子注入技术的开发，并提供技术转让和技术服务等全方位服务公司拥有先进的真空设备三台、超声波清洗设备、去离子水设备等相关配套生产设备，完全可以满足客户的生产要求。

This paper presents the working principle of the vacuum electrostatie spray painting on electric irons,Describes the role of corona discharge in bottom vacuum electrostatie spray painting.

介绍了电熨斗底板真空静电喷涂的工作原理。说明了电晕放电在底板真空静电喷涂中的作用。

2SKW is also used as vacuum pump; it is especially applicable to the high vacuum condition and high discharge pressure vacuum compression condition, which can not be completed by common single-stage pump, thereby, the serviceable range of SKW single-stage pump is widened.

2SKW也可用作真空泵，特别适合于单级无法比拟的高真空工况和出口压力要求较高的真空压缩工况，从而拓宽了SKW单级泵的使用范围。

The cathode phenomena in hollow cathode arc discharge in vacuum wereinvestigated systematically. The influence of welding parameters on active zone ofhollow cathode , arc appearance and voltage-ampere curve was investigated.

小电流的发散态电弧能量密度低，柔性大，可作为局部加热热源进行真空钎焊；大电流的可作为理想的熔焊热源，进行各种难熔易氧化金属在真空条件下的高质量焊接。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。