| 1. | Transient state frequency variation
动态频率变化率 |
| 2. | Frequency variation rate
频率变化速率 |
| 3. | Digital filtering technique based on least square method , multichannel sampling technique and frequency variation sampling technique were used experimentally
实验应用了基于最小二乘法的数字滤波技术、多通道采样技术、变频率采样技术。 |
| 4. | The algorithm of economic power dispatch , which considers the constraint condition of network loss and frequency variation , is studied , and a pragmatic and effective method of frequency control is put forward , and the marginal cost is analyzed
本文研究了计及网损和频率变化率约束条件的有功功率经济分配的算法，提出了一种实用有效的频率控制方法并对边际成本进行了分析。 |
| 5. | In order to probe into the anti - friction mechanism and effectiveness of turbulent zone of flexible pipe , extensometer with high accuracy and high - frequency response characteristics is used to study the frequency variation feature of flexible pipe ' s outer diameter with reynolds number
摘要为探讨柔性管的紊流区域减阻效果的产生机理，采用高精度高频率响应特性的应变仪对柔性管外径随雷诺数的频率变化特性进行了研究。 |
| 6. | We still analyzed the time - frequency variation properties of the data before several selected geomagnetic storms . the result shows that the gcrs " intensity with period of 16 - 32 hours increased remarkably for those events that ocrs intensity increased before the geomagnetic storms
对于磁暴前银河宇宙线强度增强的事件，银河宇宙线周期为16 ? ? 32小时的信号都有较明显的增强，部分事件银河宇宙线周期为儿个小时的信号也明显提高（如1991年的事件） 。 |
| 7. | According the special application background of the single source and the short line in the 110kv power system , the author proposed a feasible protective scheme , in which the power frequency variation distance protect theory with combination to the four - lateral distance relay is used as quick and mainly theory
本人针对110kv单电源短线路这一特殊应用背景，提出了以工频变化量距离保护为快速主保护，结合四边形三段式相间和接地距离保护的保护原理方案。 |
| 8. | In the paper , firstly , the distance protect theory and it ' s development are introduced simply , secondly , the power frequency variation distance protect theory and the operator quality applied in the power system of single source and short line are discussed in detailed , the feasibility of the proposed protect scheme has been proved
本论文首先对距离保护及其发展状况进行了概述，然后详细论述了工频变化量距离保护原理及其在单电源短线路中应用的特性，并论述了所提保护原理方案的合理性。 |
| 9. | Third , according to an example , the influence on soil displacement stress etc under harmonic vibration load induced by infiltration coefficient and loads frequency variation is studied numerically in dissertation . finally , the difference of layered saturated soils consolidation between rectangle and harmonic vibration loads is studied in this dissertation
再次，以数值方法研究了简谐荷载作用下成层饱和地基二维biot固结的一般规律，同时还研究了固结情况受渗透系数，频率等参数影响的规律。 |
