频率比较 meaning in Chinese
frequency comparison
Examples
- The largest ring begins to resonate first because it has the largest mass ( and so it has a low resonant frequency ) and because it is the least stiff of the rings ( also giving it a low resonant frequency )
最大的环状物最先开始共振，因为他的质量最大（它的共振频率也因此较小）同时，因为它是所有中最不坚硬的，所以它的共振频率比较小。 - For example , the quenching and quenching plus low tempered structure of 38crmoal are hard to be differentiated by velocity method and the principal frequency technique . it will be better if they are differentiated by the method of relative attenuation coefficient
38crmoal钢的淬火与淬火+低温回火组织，用声速法和主频率比较法都难以区分，最好的方法是比较功率谱谱峰特征(幅度、数量、分布) 。 - In the plate region of a vehicle image , the gray value varies frequently in cross - direction , so we define a parameter " . cross variance " to describe it . we also calculate other parameters to approximately locate the plate , they are the space length between two chars , the thickness of stroke , the peak and trough of gray value , the ratio of width and length , etc . at last , we exactly locate the plate by the theory of mathematical morphology
该方法根据图像车牌区域横向灰度值变化频率比较大这一特征提出了横向方差参数，并结合车牌的字符间距、笔划粗细、灰度峰谷值、长宽比值等特征粗定位车牌，在车牌的精确定位中利用了数学形态学的方法。我们从某高速公路收费站实地拍摄的照片中选取了1000多幅作为实验样本数据。 - Female courtship signal of the brown planthopper was made of many continuous regular pulses and male ' s signal was made of similar syllabics and had two types with different time domain characteristics . second male vibrational signal differed from male courtship signal with wide spectrum range and regular syllabics frequency . time domain characteristics of signals in different individuals even the same individual were different
频域特征分析知，褐飞虱雌虫求偶呜声信号的频域特性较稳定，个体内比个体间差异小；雄虫求偶呜声信号s 、 e片段频谱范围较宽，但主振频率比较接近，差异不显著； m片段频带较窄，主振频率mvf略小于s 、 e片段，变异较小； m片段脉冲重复频率prf为幻 - The reason that bump vibrates when working is bump system ' s stimulus frequency is quite consistent with its inherent frequency and its hydraulic system ' s impact . by analyzing bump working frequencies " relation to its inherent frequency , the 150 - liter per minute input flow is recommended at exiting function parameters
结合动应力分析结果、固有频率分析结果及疲劳寿命分析结果可以看出：系统的激扰频率与结构一阶固有频率比较一致以及液压系统的冲击是引起泵车工作时振动的主要原因。