The white noise scanning test was conducted before the shaking table test and repeated at every interval of each test to obtain the law of the basic frequency vary with the time.
在模拟地震试验前和各阶段模拟地震试验后均对模型进行了白噪声扫描试验，考察了模型的频率变化规律。
DDS Chip AD9850 has precise output frequency, small frequency interval, and high signal to noise ratio.
DDS芯片AD 9850具有输出频率精确、频率间隔小、易于调谐、信噪比高等优点。
The identification accuracy is related to the order of the fitting model, sample interval and sample number, and also affected by signal noise, which shows the method should be improved.
辨识精度与算法中拟合模型阶数、采样时间间隔和采样总数有关，并受信号中噪声的影响，需加以改进。
But change of telemetering signal interval caused by channel noise will affect transmission accuracy of telemetering information when it is used to transmit telemetering signals.
雷达接收机信道对于信号检测是最佳系统，当用其传输遥测信号时，由于信道噪声的影响，使遥测信号码间距发生变化，从而影响遥测信息传输精度。
When there is faint Doppler echo in noise, the system output is intermittent chaotic, and the Doppler shift can be obtained accurately by calculating the interval of chaotic state.
当噪声中含有微弱的多普勒回波时，通过理论分析可知系统输出为阵发混沌状态，且可根据混沌状态的间隔周期较准确地求出回波信号的多普勒频移。
Since the interference is smooth in some time interval, it is possible to adopt the adaptive noise canceller to suppress the interference effectively.
由于牵引电流干扰是在一定时间间隔内是平稳的，采用自适应干扰对消器可有效抑制牵引电流干扰。
Their hands met, and he thoughthe heard her say: "Yes, we're sailing tomorrow in theRussia--"; then there was an unmeaning noise of openingdoors, and after an interval May's voice: "Newland!
他们的手相遇了，他觉得仿佛听见她说：“是啊，明天我们就要乘俄罗斯号起航——”接着他又听见几次毫无意义的开门的声音，过了一会儿，只听梅的声音说：“纽兰！
The experimental results indicated that the effects of the noise frequencies and exposed conditions on HRV during R-R interval period were significant .
该文通过实验研究了不同频率、不同噪声级和不同暴露条件下的噪声对人体的心率变异的影响。
Measuring and analyzing technology based on variable-time-interval Fourier transform was dealt with for vehicle accelerating noise signal.
提出了基于变时基短时傅里叶变换来分析和处理时变信号的技术。
AIM To investigate the method of decreasing the noise disturbance in electrocardiosignal and improve the test precision of RR interval in heart rate variability HRV signals.
目的：探讨改善心电信号噪声干扰的方法，提高对心率变异信号中的RR间期检测精度。
Based on the assumption of the unknown-but-bounded (UBB) noise, an interval algorithm for set-membership identification of parameters of linear time-invariant system was used to seek the minimal.
本文讨论了在噪声功率有界的假设下双线性系统参数的集员辨识，给出了双线性系统参数集员估计的递推形式，并讨论了收敛性。
Based on multiscale optimal filtering fusion, an optimal state fixed-interval smoothing algorithm is developed for systems with multiplicative noise.
针对多尺度带乘性噪声系统，在多尺度最优滤波融合的基础上，进行状态最优固定域平滑算法的研究。
Based on multiscale optimal filtering fusion, an optimal state fixed-interval smoothing algorithm is developed for systems with multiplicative noise.
针对多尺度带乘性噪声系统，在多尺度最优滤波融合的基础上，进行状态最优固定域平滑算法的研究。
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