1) local ridge frequency
局部脊线频率
1.
Then,the gray projection on the local orthogonal axis was used for estimating the local ridge frequency.
首先利用图像的局部灰度分布特点计算局部方向角;然后利用局部正交方向轴线上的灰度投影量估计局部脊线频率;最后利用自适应的具有方向选择和频率选择的Gabor滤波器对原图像进行滤波增强。
2) ridge frequency
脊线频率
1.
Then,para-meters for the ridge frequency calculation are determined according to the fingerprint sensors.
基于G abor滤波器的低质指纹增强技术,对区域掩模及脊线频率的计算进行了改进。
3) Local frequency
局部频率
4) 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。
5) local ridge orientation
局部脊线方向
6) 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 。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
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