This paper establishes the lower bound and the upper one of the feedback number of Kautz networks K(d,k) by using the minimum orbit, and determines the feedback number for k3.
本文利用Kautz最小轨道的方法确定出了Kautz有向图K(d,k)反馈数的一个下界和上界。
He thinks exoplanets are pulled towards the star by the dust and that when the dust runs out, the exoplanets stop moving.
天文学家们认为，他们应该是从外层轨道移动到里面去的。
Electrons closer to the nucleus are held more tightly than those in the outer orbits.
靠近原子核的电子比外层轨道上的电子结合得紧。
This makes the system of orbitals unstable and an electron from an orbital further out rapidly fills the hole.
这使得轨道系统不稳定，外一层轨道的电子会迅速跃迁到内层空轨道上，填补空穴。
Why don't they shoot off into outer space?
为什么它们不会被甩出轨道进入外层空间呢？
Working Group on the Definition and Delimitation of Outer Space and Geostationary Orbit
外层空间和地球静止轨道定义和定界工作组
Public registry of objects launched into orbit or beyond
射入轨道或轨道以外物体之公开登记
The Influence of Spaceship's Main Parameters on Orbit in the Phase of Extra-atmospheric Flight
飞船在大气层外飞行段的主要参数对轨道的影响
over-track station
上层轨道下层站房的车站
coach, railway or tramway, powered from an external source of electricity
铁道或电车轨道客车,外部电源驱动
On the TV screen the sky lab could be seen orbiting round the earth in outer space.
在电视屏幕上，人们可以看到那个空间实验室在外层空是轨道上绕地球运行。
Q Would orbital stations be choice places from which to try to communicate with extraterrestrial intelligences?
问：太空轨道站也会是设法与地球大气层以外的信息进行通讯的理想场所吗？
orbiting radio beacon ionospheric satellite
电离层轨道无线电信标卫星
Only two of the electrons in the second level reside in hybrid orbitals.
第二层仅仅两个电子处于杂化轨道中。
The inside orbit has 2 electrons.
最里层的轨道上有2个电子。
Research and Progress on CA Mortar of Ballastiess Slab Track Cushion
板式无碴轨道垫层CA砂浆研究与进展
Rail brakes for trapped car use at home and abroad are introduced.
介绍了国内外卡轨车使用的轨道制动器现状。
The elastic rigidity of rail pad and ballast, stiffness of rail, and clamping force of fastener are the main factors that cause the widening of gauge.
钢轨垫层和道床的刚度、轨刚度和扣件扣压力是影响轮轨之间作用力和轨距扩大的主要因素。
rail - lifter
起轨[道]机, 升轨器