Chaos system is sensitive to weak signals and immune to noise, which make chaos have good prospects in information detection technique.
由于混沌系统具有对小信号的敏感性及对噪声的免疫性等特点，使得混沌在信息检测技术中具有很好的发展前景。
Using the optical chopper to modulate the detected light to make it related to the reference squarewave signal is a common method of locking phase detection of weak signals.
其中利用光学斩光器对被测光进行调制使其与方波参考信号相关是对微弱光信号进行锁相检测的一种常用方法。
Detection and classification of weak underwater signals are difficult problems in processing acoustic signals.
水下弱信号的检测和分类是水声信号处理领域中的难题。
The method which combines cross correlation detection with chaos theory to detect the weak signals relative to central frequency in overvoltage monitoring is proposed in the paper.
提出将互相关检测和混沌理论相结合应用于过电压监测中的频率跟踪，检测相对于中心频率极小的微弱信号。
There are two kinds of methods in detection for weak signals based on chaos: one is based on phase transition of the chaotic system, the other is to use some characteristic exponent of the system.
目前，利用混沌振子检测微弱信号的两种方法分别是：基于系统相轨迹变化的方法和基于系统特征指数的方法。
The method of detection ability enhancement of surface wave signals for weak events is studied. Moreover, this method is applied to a set of events at regional stations.
本论文对如何提高小震级事件面波信号检测识别能力的方法及该方法在面波信号检测中的应用进行了分析与研究。
This method also has characteristic of low amplitude detection threshold, it can detect weak signals with amplitude value smaller than 10-3 level.
该方法还具有幅度检测门限值低的特点，可对幅度为10 - 3级以下的信号进行检测。
In order to detect weak signals overwhelmed in noise, the method of signal detection is investigated using the principle of stochastic resonance.
针对淹没在噪声中的弱信号测量，利用随机共振技术进行了信号检测的研究。
The ordinary detection methods for weak signals, like energy detection method, can't meet the practical requirements for the detection of these signals.
常规的微弱信号检测方法，如能量检测方法，对这类信号的检测不能满足实际需要。
Chaos detection for weak signals belongs to this technique. Although it is a new subject, it has already made a great progress.
微弱信号混沌检测则是此类技术的一个重要分支，虽然刚刚起步，却已取得了很大的进展。
It is pointed that wavelet analysis has a powerful ability for weak signal detection, which is suitable for withdrawing fault diagnosis of acoustic emission (AE) signals well.
小波分析具有很强的弱信号的检测能力，适用于提取声发射信号的故障特征。
As far as cased-hole formation resistivity logging, the key problems needed to be solved are detection of ultra-low frequency and extremely weak signals, as well as reduction of strong interferences.
超低频、纳伏级信号的检测以及强干扰的抑制是过套管地层电阻率测井需要解决的关键问题。
As far as cased-hole formation resistivity logging, the key problems needed to be solved are detection of ultra-low frequency and extremely weak signals, as well as reduction of strong interferences.
超低频、纳伏级信号的检测以及强干扰的抑制是过套管地层电阻率测井需要解决的关键问题。
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