频率区间 meaning in English
frequency separation
Examples
- The law of permeability changes of different frequency range was studied during the wire rope fatigue test
研究了钢丝绳弯曲疲劳历程中，磁导率在不同空间频率区间的变化规律。 - The simulation of these particular systems is based on a fractional integrator where the non - integer behavior acts only on a limited spectral band
这种特殊系统的仿真建立在有限频率区间非整数阶积分算子的基础上，其非整数阶作用仅限于有限频率区域。 - It can separate the real signal from noise signal effectively and attains the purpose of de - noise by using time - frequency localizing anslysis , local feature abstract , time - change filter wave , restraining or attenuating some frequency range and other characters of wavelet . furthermore , the ratio of signal to noise has been improved greatly and it is not affected by signal state
而利用小波分析的时频局部化分析、局部特征提取和时变滤波、抑制或衰减某些频率区间等特点，能更有效地把真实信号和噪声信号区分开来，达到消除噪声的目的，并且这种方法恢复的信号，信噪比有明显的提高，还不受信号的状态的影响。 - Fourth , directing against the characteristic of gear wheel vibration , have recommended drawing a certain signal with interval frequency in the signal , suppressed or decayed some signals with interval frequency in the signal , predicted the development trend of the signal , such contents as similar of analyzing the signal . such also offer the effective analysis means for the thing that the vibration signal of the gear wheel will be analyzed and researched in the future
第四，针对齿轮振动信号本身的特点，介绍了提取信号中某一频率区间的信号、对信号中某些频率区间的信号进行抑制或衰减、预测信号的发展趋势、分析信号的自相似性等内容，为今后齿轮振动信号分析研究提供有效的分析手段。 - Based on apdl , the design language of finite element analysis software ansys , and visual c + + , the software on acoustics design of underwater cylindrical shell structure is developed . when input parameter of the cylindrical shell in the interface redeveloped in this paper , the software execute the batch file of apdl in the vc process to establish the finite element modal and carry out the analysis , the analysis result and the vibration mode can also be displayed . furthermore , the software has been developed to process the acoustics optimization design of the finite cylindrical shell with stiffener in appointed frequency range
本论文从便于工程实际应用出发，对使用有限元分析软件进行二次开发以方便结构振动分析及改进结构设计的方法和过程进行了研究，在此基础上对水下航行器圆柱壳体的结构声学特性进行了分析，在指定频率区间，对结构以振动辐射声功率级为目标函数进行了部分参数的结构优化设计，与此同时，为了方便有限元分析软件的使用和简化设计过程中大量重复的工作，利用ansys提供的参数化设计语言apdl ( ansysparametricdesignlanguage )结合vc对有限元软件ansys进行了二次开发，形成了一体化的水下圆柱壳体结构声学设计软件。