| 1. | Owing to the phenomenon of libration it is possible to observe up to 60% of the total lunar surface .
由于天平动的现象，我们可能观测到月球总面积的60。 |
| 2. | 5 . lessen libration , debase noises , avoid pollution , improve working condition
5能使机械减少振动降低噪音防止污染，改善劳动条件。 |
| 3. | Owing to the phenomenon of libration it is possible to observe up to 60 % of the total lunar surface
由于天平动的现象，我们可能观测到月球总面积的60 。 |
| 4. | Therefore it is essential to identify the problems cause by the model structure in the automatic ca libration
此在自动率定的过程中认识到模型结构所导致的问题是非常关键的。 |
| 5. | Through optimizing design to fulfill strong steel structure , and to ensure the machine weaving abb with high speed , strong power and small libration
通过优化设计而实现的高钢性机架构造,保证了织机高速、强劲、低振动的稳定打纬。 |
| 6. | The features of metal screw gear is reducing noise and libration . what is noticeable is : the equivalent plastic straight gear may effectively reduce the noise and libration
金属螺旋轮通常特点是能降低噪声和振动值得注意的是，等效的塑料直轮可以更有效地降低噪声和振动。 |
| 7. | 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 about 6 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。 |
| 8. | Despite the moon ' s rotational and orbital periods being exactly locked , we may actually observe about 59 % of the moon ' s total surface with repeated observations from earth due to the phenomena of librations and parallax
尽管完全地被锁的月亮的回转而轨道的期数，我们由于振动和视差的现象可能实际上用来自地球的重复的观察观察大约59 %月亮的完全表面。 |
| 9. | The assembly language program collects and processes the data real time . comparing kinds of method of filter and arithmetic of fft , the author select the fir filter to realize pretreatment of signal and radix - 2 fft to distill the characters of librations
通过对各种滤波方法和fft算法进行比较，本套数据检测和校准处理系统采用fir滤波对采集到的信号进行预处理，利用基2fft算法来提取信号的频率特征。 |
| 10. | The fractal theory application to fault diagnosis is tried in order to overcome the defec t of wavelet transform to nonlinear signal analysis and complicated machine diagnosis , including the concept , function and application about fractal dimension and the process of applying it to analyze the libration signal of rolling bearing and engine burning
针对小波变换分析复杂非线性机械系统时表现出的力不从心，又尝试探讨了分形理论在故障诊断领域中的应用，讨论了分形维数的概念、物理意义和应用，并通过滚动轴承和发动机燃烧振动信号的分析例示探讨和展示了应用分形方法进行故障诊断的方法和过程。 |
