A device that generates periodic signals used for synchronization.
一种产生用于同步的周期性信号的装置。
A strategy for the equivalent nonuniform time sampling of periodic signals is proposed.
本文提出了一种周期信号等效非均匀采样策略。
The error caused by each algorithm was analysed, and some Suggestions for ac periodic signals measurement were provided.
分析了这三种改进算法的误差和性能，供交流周期信号测量选择。
The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
反映滚动轴承故障的特征周期信号处于较低频带内，容易被噪声淹没，难以检测。
The method does not confine to ECG, is also suitable for JPEG2000 compression of other periodic or quasi-periodic signals.
该方法的应用范围不局限于ECG信号，也适用于其他形式周期或准周期信号的JPEG2000压缩。
Self adaptive predictor is used to extract periodic signals with unknown frequencies from wide band random noise background.
自适应预估器能用来提取宽带随机噪声背景中未知频率的周期性信号。
Then, the affine mapping theory is applied to modeling a class of hysteresis, which is stimulated by smooth periodic signals.
运用坐标变换方法和仿射映射的有关原理，对迟滞系统的输入信号进行变换映射。
Digital look up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis.
数字查表法合成周期信号是一种最常用的直接数字频率合成技术。
When periodic signals are analyzed in the laboratory, we measure the frequency spectrum of signals usually by a selection level meter.
在实验室进行周期信号分析时，通常使用选频电平表来测量其频谱。
And it is further proved that the technique is effective and practical by means of the examples of the extraction of periodic and aperiodic signals.
运用周期和非周期弱信号的检测实例，进一步证明了该方法的有效性和实用性。
A new spectral interpolated compensation analysis method of periodic signals to compensate the spectral leakage caused by non-coherent sampling process is presented.
针对周期信号实际的非同步采样，提出一种频谱插值校正的分析法。
In the presence of process model uncertainties, the efficient controller can be designed by using the frequency response of the process at the frequences defined by the periodic signals.
在过程存在不确定性时，在周期信号作用的频率域内根据过程的频率响应，设计了有效的控制器。
In the direct digital synthesis of periodic signals, the frequency resolutions and bands of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.
在利用直接数字式合成方法产生周期信号时，信号的频率分辨率和带宽直接受限于合成系统的工作频率和存储容量。
Synchronous sampling by software is commonly used in digital measurement of periodic electric signals.
软件同步采样是周期电气信号测量中最常用的采样方式。
A new approach to extract weak periodic signal from strong noise is proposed to pick up some weak signals in the fault diagnosis of mechanical equipment.
为提取机械设备故障诊断中的某些微弱信号，给出一种新的提取强背景噪声中微弱周期信号的方法。
The method of discrete spectral line identification presented in this paper applies to the precise spectral analysis of all kinds of periodic time domain signals.
本文提出的分立谱线辨识方法普遍适用于各种周期性时域信号的精密谱分析工作。
The periodic oscillators at critical state are immune to noise and have sensitive dependence on weak sine signals or phase-coded signals at the same time.
临界混沌状态的周期振子对噪声具有免疫力，而对微弱的正弦信号或相位编码信号比较敏感。
Based on the theory of repetitive control, the repetitive controller, which makes the output of the system track the periodic reference signals, is designed.
根据重复控制理论设计重复控制器，使系统的输出跟踪输入的周期性或重复性参考信号，从而达到跟踪控制的目的。
Objective To study structure of the unstable periodic orbits (UPOs) of R-R interval signals of heart during orthostatic standing, and to reveal the dynamic characters of heart rate variability (HRV).
目的研究立位心脏R- R间期信号的非稳定周期轨道的结构，进一步探讨心率变异（HRV）的动力学特征。
The presence signals transmissions may be periodic or may be stimulated by a stimulus from the WLAN or external device that may or may not be coupled to the WLAN.
存在信号传送可以是周期性的或者是受来自WLAN的或者来自耦合于或未耦合于WLAN的外部设备的激励因素而被激发的。
This paper presents a design and realization for a DSP based on real time low SNR periodic signal extracting system for low SNR signals.
本文介绍了一种基于DSP的低信噪比周期信号实时提取系统的设计和实现。
The results show that the EWC threshold method of complex wavelet transform can effectively suppress the periodic narrowband interference from GIS UHF PD signals.
研究结果表明：基于EWC阈值法的复小波变换能够有效地抑制GIS特高频PD信号中的周期性窄带干扰。
The results show that the EWC threshold method of complex wavelet transform can effectively suppress the periodic narrowband interference from GIS UHF PD signals.
研究结果表明：基于EWC阈值法的复小波变换能够有效地抑制GIS特高频PD信号中的周期性窄带干扰。
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