| 1. | The periodic variation in speed of a synchronous motor with respect to the current
（同步电动机的）速度偏差同步电机运行速度的周期性变化 |
| 2. | The precipitation and temperature both existed 5year periodic variation in the pre - flood period in the south of china
华南前汛期降水和气温都有5a的主周期。 |
| 3. | The periodic variation of ssta of the two key regions combine reflect vary length periodic variation of flood season precipitation anomalies in liaoning areas
两关键区ssta周期特征反映辽宁汛期降水异常的不同长度周期特征，且有很好的互补关系。 |
| 4. | ( 2 ) summer rainfall of north china exists periodic variation of quasi - three years and six years , and . spring , autumn and winter also exist periodic variation of quasi - three years
( 2 )华北地区夏季存在3年左右的主周期及6年左右的次周期，春、秋、冬三季都存在3年左右的主周期。 |
| 5. | In the third chapter , we can obtain the soil temperature field expression under the different depth and the different time through carrying on the analysis of the temperature field of the symmetry semi - infinite big object under the periodic variation boundary condition
在第3章,通过对匀质的半无限大物体周期性变化边界条件下的温度场进行分析可以得出在不同深度、不同时刻下的土壤温度场的表达式。 |
| 6. | ( 3 ) the precipitation anomaly existed 3year . 5year 7year 14year periodic variation in the pre - flood period in the south of china . the temperature anomaly existed 2year 4year 5year 12year 19year periodic variation in the pre - flood period in the south of china
( 3 )华南前汛期降水异常存在3a 、 5a 、 7a的年际周期和14a的年代际周期；华南前汛期气温异常存在的2a 、 4a 、 5a的年际周期及12a 、 19a的年代际周期。 |
| 7. | ( 2 ) the precipitation shows periodic variation of 2 - 4 years in the four seasons and significant 10 - 12 years periodic variation in summer and flood season . ( 3 ) liaoning flood season precipitation anomalies in phase with huabei and dongbei , jiangnan inverse
在周期上，辽宁四季降水的3年左右振荡特征较为一致，夏季和汛期的10 12年周期显著。辽宁汛期多少雨年同期华北、东北与之同位相，江南与之反位相。 |
| 8. | The results showed that the whole distribution pattern of winter chilling damage in guangdong had quasi - 8 year periodic variation , and the south - north distribution pattern had quasi - 22 year periodic variation . generally speaking , the periodic variation of winter chilling damage in guangdong had quasi - 8 year mainly oscillation
结果发现，广东冬季寒害的整体分布型具有准8年的周期变化；南北分布型具有准22年的周期变化；综合而言，广东冬季寒害具有准8年主要振荡的周期变化。 |
| 9. | The results show that : the whole bit wear process can be divided into three phases ; the regularity of the machining time per hole with the number of holes machined is close to a periodic variation ; higher machining efficiency or working life can be obtained when the drilling pressure and the wall thickness of the bit are advisable
发现钻头的整个磨损过程可分为3个阶段；孔加工时间随孔数近似呈周期性变化；钻压和钻头壁厚适当时，可获得更高的加工效率或者工具寿命。 |
| 10. | Northeast china floods season precipitation take place a mutation in 1967 . the distribution of northeast china floods season precipitation anomalies shows different phase in different years . ( 3 ) northeast china precipitation anomalies shows complex periodic variation in different seasons and in different years , but all the season exist periodic variation of quasi - three years and over 10 years to different extent
汛期降水异常的空间分布在不同年代有不同的位相分布特征( 3 )东北地区降水不同季节不同年代表现出了较为复杂的周期特征，其中各季都表现出了明显的准3年振荡的周期特征，同时还不同程度存在10年以上的周期。 |
