1) local frequency change ratio
局部频率变化率
1.
Based on element local frequency change ratio method and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.
利用单元局部频率变化率法和单元模态应变能比法 ,对连续梁桥进行了损伤诊断的数值模拟研究 。
2) Local frequency
局部频率
3) strain rate localization
应变(率)局部化
4) local fault variability
局部故障变化率
1.
The paper puts forward a new idea about local fault variability of repairable system, and establishes a new model of estemating degration.
提出可修复系统局部故障变化率新概念，运用数理统计方法，建立了可修复系统的劣化度量新模型。
5) Local orientation variance
局部方向变化率
1.
Candidatesmall blocks which may contain singular points are located with the integrated method of improved Poincaré index calculation with the orientationdistribution analysis of the block orientation images; Local orientation variance in the candidate blocks is computed and used to locate the position ofsingular points accurately.
将指纹图像分块,求出各块的方向构成块方向图,并在块方向图的基础上利用邻域方向的分布分析结合改进的PoincareIndex方法来确定奇异点所在的候选区域,对候选区域中的像素再通过计算局部方向变化率来确定奇异点的精确位置。
6) local frequency method
局部频率法
1.
On the damage location of derricks based on local frequency method;
基于局部频率法的井架损伤定位研究
2.
Damage location of a derrick is determined by using local frequency method, whic h is implemented by analyzing the changes of local inherent frequency of the str ucture as damages existed in the derrick structure.
应用局部频率法确定井架损伤部位是通过分析井架结构存在损伤时结构局部固有频率的变化来实现的。
补充资料：频率变化率继电器
频率变化率继电器
frequency change rate relay
P Inl口b旧nh口olu]一d一orlql频率变化率继电器(frequeney。hange:aterelay)当所在点交流电压的频率变化率超过预先设定值时动作的继电器。主要用于电力系统的自动低颇减负荷装置中，配合低频继电器的动作，在电力系统发生严重有功功率缺额情况下，加速自动减负荷，以迅速恢复电力系统频率，保证电力系统安全稳定运行。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条