| 1. | Dynamic frequency selection dynamic channel selection dfs dcs
动态频率选择动态信道选择 |
| 2. | Dynamic frequency allocation
动态频率分配 |
| 3. | Dynamic frequency scanning
动态频率扫描 |
| 4. | The dispersion of dynamic frequency in complicated system is one of reasons which lead the unsatisfactory performance of under frequency load shedding device
而复杂系统动态频率的时空分散性正是导致低频减载装置动作不令人满意的原因之一。 |
| 5. | On the basis of discussing frequency characteristics , this thesis analyses the factors which affect dynamic frequency characteristics of simple and complicated power system separately through simulation
本论文在分析电力系统频率特性的基础上，分别通过仿真分析了影响简单系统和复杂系统动态频率特性的因素。 |
| 6. | The relationship between the body dynamic frequency bandwidth and the precision of the dynamic surveying with incomplete inertial sensors is clarified which can be a guideline for practical inertial system designs
通过频域分析，阐明了载体姿态运动频带宽度与动态测量精度的关系，对实际工程中惯性系统设计具有重要的指导作用。 |
| 7. | Analysis of dynamic frequency process of power system is basis of system performance research 、 design of under frequency load - shedding scheme and evaluation of different measure of voltage regulation and frequency regulation . with development of power system , there are more and more factors that affect dynamic frequency characteristics which make it more and more complicated . the method which use single - generator - to - load model to analyse frequency dynamics can not suit for actual system
随着电力系统的发展，影响动态频率特性的因素越来越多，动态频率特性日趋复杂，用传统的单机模型分析系统动态频率特性的方法已不能适应实际系统的需要，迫切需要对现代电力系统中影响动态频率特性的因素进行分析。 |
| 8. | As the deformation caused by centrifugal force is beyond the small deformation range , the large deformation effect was also taken into account in the equation . two models are constructed , one is of shrouded blade and the other is of bladed disc . the static natural frequencies and dynamic frequencies ( under 3000rpm ) are calculated by the finite element method and cyclic symmetry technique
针对叶片的结构特点,采用适应较强的三维八节点实体单元模拟叶片,建立叶片运动微分方程;叶片?轮盘系统在高速旋转时,受到离心力作用,使叶片发生大变形,故在方程中考虑了几何大变形的问题;为研究叶根轮缘之间的接触状态,建立了考虑叶根?轮缘接触的有限元方程,利用拉格朗日增广算法来求解该方程,确定叶根轮缘之间的接触面状态。 |
| 9. | By introducing an oblivious policy and sorting chinese characters in accordance with their dynamic frequencies , the algorithm made important improvements on the average search length of chinese characters , which could better guarantee the strict demand on time of any application driven by the dyanmic statistics of chinese texts
由于引进了动态遗忘机制以及根据频率动态调整汉字顺序，算法的平均查找长度成倍缩短，从而能够更有效地保证涉及大量汉字信息检索操作的应用对时间性能的要求。 |
| 10. | The factors which affect load frequency characteristics are dissected in this thesis . frequency characteristics of constant revolution controlled load 、 synchronous motor dragged load 、 asynchronous motor dragged load and their effect to dynamic frequency characteristics are analysed . conclusion is reached as : increasing the efficiency of asynchronous motor can recede its slip and improve dynamic frequency characteristics
论文深入分析了影响负荷频率特性的因素，分析了恒转速控制工具机、同步机拖动工具机以及异步机拖动工具机的频率特性和它们分别对系统动态频率过程的影响，得出了恒转速控制工具机对系统动态频率不利；提高异步机的效率可降低其转差率，从而改善系统动态频率特性的结论。 |
