本文阐述了回转周期结构振动特性分析的有限无法。
The finite element method for vibration characteristic analysis of periodical gyro-structures is described in this paper.
其原理是通过直接测定轮带和筒体的回转周期，来自动计算轮带与筒体之间的动态间隙。
While directly measuring the cycle time of the tyre and shell, the dynamic clearance be-tween the tyre and shell can be carried out by some calculations.
事实上，由于现状如此糟糕，大家普遍预计经济将停止下滑，并伴随公司库存周期回转和恢复订货在未来6个月内开始反弹。
Indeed, things are so bad that it is generally assumed that they cannot get any worse, and will instead improve over the next six months as the inventory cycle turns and firms restock.
这种模式可以扩展到来回转换的状态标志，但是只有在转换周期不被察觉的情况下才能扩展(从false到true，再转换到false)。
This pattern can be extended to state flags that can change back and forth, but only if it is acceptable for a transition cycle (from false to true to false) to go undetected.
本文采用动态数据系统建模分析法与改进的周期图检验法相结合，对主轴回转精度进行混合谱分析。
This paper presents a method with mixed spectra for analyzing rotational accuracy of spindles, making use of the modified periodogram test combined with dynamic data system modeling.
而时域同步平均可以有效衰减与回转频率无关的干扰，提取与工作状态直接相关的周期信号。
Time domain synchronous averaging can reduce the signal not coherent to rotation frequency effectively, and extract the repetitive signals directly related to machine operation condition.
在此基础上，采用控制周期总体间隙状况和局部短路的伺服控制策略，建立了基于模糊控制技术的回转式电火花展成加工伺服进给控制系统。
And adopting the method in which including periodical detecting and local detecting of gap discharge state, the servo feed control-system based on fuzzy control technology was designed.
轴系回转误差运动的特征是一项复合信号，它含有周期分量和随机分量。
The characteristics of error motion of shafting is a complex signal which includes periodic component and random term.
内衬运转周期已由1999年的204天提高到现在的300天，氧化铝回转窑运转率也由1999年的89%提高到现在的94%。
Till now the life cycle of kiln lining prolong from 204 days in 1999 to 300 days. And the operation rate of kiln rises from 89% in 1999 to 94%.
例如，在周期的中期从宽松回转到紧缩，或者一个新的银根放松周期的第一个放松的举动。
For example, a shift from easing back to tightening in mid-cycle, or the first easing move of a new easing cycle.
本文利用灰色理论的GM(1,1)模型，对水泥回转窑换砖周期进行预测，取得了满意结果。
In this paper, the GM (1, 1) model based on the Gree Theory is used to predict the brick exchange period of cement kiln, and the available result is satisfactory.
若采样长度与回转速度不吻合，将会出现伪周期，使主值函数项中提取周期成分后的信号失实。
If sampling length doesn't adapt rotative velocity, the results of calculation by FFT or periodogram analysis will lead to pseudo-periods, which distorts the principal value function terms.
随后斗轮机构及回转机构运行开始取料，变幅机构配合取料作周期性动作。
Afterward the bucket-wheel organization and the swiveling mechanism movement starts to take the material, the amplitude organization matches the conjunction material to make the periodic movement.
随后斗轮机构及回转机构运行开始取料，变幅机构配合取料作周期性动作。
Afterward the bucket-wheel organization and the swiveling mechanism movement starts to take the material, the amplitude organization matches the conjunction material to make the periodic movement.
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