轨道的

Research shows that the action integral of periodic orbit has a simple linear relation with the energy of system, we could semiclassically quantize the system using the nearnest integer of the periodic orbits' action integral.

研究表明，周期轨道的作用量积分与系统的能量有着简单的线性关系，可以利用周期轨道的作用量积分最接近的整数对系统进行半经典量子化。

The automorphism groups of the two posets are given and the numbers of orbits of the automorphism groups are counted. At the same time, the number of words in every rank of the posets is obtained.

本章给出了偏序集P和Q的自同构群，计算了在各自的自同构群作用下轨道的个数以及每一轨道中元素的个数，得到了偏序集中每一秩中元素的个数。

Prior to the giant planet killer asteroid, several hundred smaller ones travelling on the exact same trajectory always precede it, giving us ample warning by striking the Earth 3 weeks ahead of time even though we're in a totally different position in our orbit.

在这巨大的杀手级小行星前，数百颗同样轨道的小碎片总是领先它，在三个星期前给予人类充份的预警时间，尽管地球还在撞击轨道前的位置上。

The results show that,the control of delaying period-doubling bifurcations and unstable periodic orbits in a chaotic attracter of the AOB system is effectively realized,and other stable periodic orbits 2np、3mp and 2np×3mp are obtained by adjusting the control parameters.

仿真模拟显示，通过选择恰当的控制参数，有效地实现了声光双稳系统中倍周期分岔的延迟控制和混沌吸引子中原不稳定周期轨道的稳定控制，同时，还可以将系统控制在2np、3mp 和2np×3mp这样其它任意所需的周期轨道上。

It was found that the sulphur and nitrogen substituted heteroacenes were intrinsically hole-transporting materials due to the reduced hole reorganization energy and the enhanced overlap between HOMOs.

发现由于减小的空穴重整能和增大的最高占据轨道的轨道重叠，硫和氮原子取代的多并苯分子在本质上为空穴传输材料。

With the speed of trains running continuously improve, the ballast track ballast of the powder, bed and the cumulative result to speed up the rate of deformation, it is necessary to strengthen the track structure and frequent maintenance work to meet the high-speed railway line on the high ride comfort, stability Requirements.

随着列车运行速度不断提高，有碴轨道的道碴粉化及道床累积变形的速率随之加快，必须通过轨道结构强化及频繁的养护维修工作来满足高速铁路对线路高平顺性、稳定性的要求。

This answer, however, runs into trouble with a variant of the trolleyconnect with the track leading to the five people (1). Here we willsuppose that without a body on the alternate track, the trolley would

那么我们再来看一个&电车难题&的变型：假设站着一个人的那条轨道的另一端是跟另一条轨道相连的，即形成一个回路，如果那上面没有这个人，电车会从这条

The bridge type derrick big car will appear to chew track phenomenon in the movement, slight of chew a track will result in a good luck and orbit of the on the side have obvious of wear away trace, severity chew a track will result in a good luck and orbit of the on the side metals be peeling off or the round's good luck outwardly transform and even jump the track to result in graveness Human body dead and injured and equipments trouble.

桥式起重机大车在运行中会出现啃轨现象，轻微的啃轨会造成轮缘及轨道的侧面有明显的磨损痕迹，严重啃轨会造成轮缘和轨道的侧面金属剥落或轮缘向外变形，甚至脱轨造成重大人身伤亡和设备事故。

A highly reliable and accurate on-board control system design scheme is presented for the orbit maneuvers of CE-1 spacecraft during its cislunar transfer phase.

文章阐述了嫦娥一号卫星地月转移阶段(从星箭分离到进入使命轨道)的高可靠、高精度自主变轨控制方案，介绍了飞行轨道、轨控策略及控制参数优化、星上自主变轨控制的系统设计和相关参数的地面标定等，给出了在轨飞行试验的验证结果。

Librations are primarily caused by the Moon's varying orbital speed due to the eccentricity of its orbit: this allows us to see up to about6° more along its perimeter.

振动主要地由月亮所引起正在由于它的轨道的古怪改变轨道的速度：这让我们沿着它的周长见到达大约6°更多。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。