normal frequency meaning in Chinese
标准频率
简正（共振）频率
简正频率
正常频率
Examples
- Normal frequency of intercourse for married couples of 25 to
至35岁夫妻的正常次数 - Normal frequency spectrum
标准频率谱 - Compared with the normal frequency - domain modal analysis method , it is more exact in parameter identification
对比一般频域模态方法，该方法对模态参数识别更准确。 - Analysis software . the analysis show : the gyroscope effect to the flywheel rotor ' s and the shaft ' s vibration character under high rotate speed should be considered . at this time , the system ' s normal frequency is the function of rotate speed ; the amplitude passing through the resonance field can be lowered obviously by improving the effective damping of the electro - magnetic bearing
建立了高速旋转状态下，采用磁轴承作支撑的飞轮转子和转轴的动力学模型，给出了有限元法在此问题中的具体应用，并利用i - deas有限元分析软件具体分析了飞轮系统的共振频率、系统振型，以及对偏心激励的响应，分析表明：对于高速旋转的飞轮转子和转轴，应考虑陀螺效应对其动力学特性的影响，此时系统的固有频率是转速的函数；通过提高磁轴承的等效阻尼可显著降低系统通过共振区域时的振幅。 - At present the manufacture of surface acoustic wave use the technology of the final submicron . a series of the devices of low insertion loss , high q saw rayleigh surface acoustic wave resonators or stws that insertion loss has less than 5db , load quality factor ( ql ) is more than 1000 on the quartz piezoelectric with zero of first temperature factor in the research . these difference frequencies are 60mhz , 280mhz , 739mhz and 1ghz of normal frequency and at also surface acoustic wave . using 1 . 25db noise factor amplifier , careful design curcuit , good setting printed curcuit board , and using the 1ghz surface transverse wave resonator as frequency element , researching the low phase noise surface acoustic wave with sideband phase noise near ? 120dbc / hz deviating 1khz on carrier , spurious suppress with 80db
本研究采用一阶温度系数为零的压电石英基片上制作出损耗小于5db 、有载品值因素( ql值)超过1000的一系列低损耗、高q值声表面波rayleigh波或stw谐振器,频率分别为60mhz 、 280mhz 、 739mhz和1ghz等不同频率的高性能声表面波谐振器。并采用噪声系数为1 . 25db的低噪声系数放大器,精心设计电路,优化设计布置印制电路板,用标称频率为1ghz的声表面波谐振器为频率控制元件,制作出在偏离载频1khz处的单边带相位噪声近- 120dbc / hz 、杂波抑制达80db以上的低相位噪声声表面波振荡器。