本文用小信号理论计算了其负阻和噪声性能，并进行了大信号性能的近似分析。
The negative resistance and the noise performances are calculated by means of small signal theory. The large-signal performances are also approximately described.
依据自动控制理论中的小信号理论，小电流TIG焊的电弧具有线性系统的特征。
According to small signal theory of automation theory, arc of low current TIG welding can be considered as a linear system.
理论上基于载流子消耗机制，对激光器型波长转换器进行了小信号分析，给出了频率响应函数。
The small signal analysis of laser diode type all optical wavelength converter is presented using carrier depletion, and the frequency response function is given.
在高效率和低电流小信号范围内，理论地分析了用反向渐变波导提高远红外波导自由电子激光器(FIR - FEL)效率的机理。
In the high efficiency and small signal region, we investigate theoretically the efficiency enhancement mechanism of far infrared free electron laser (FIR-FEL) with a reverse tapering waveguide.
其次，通过对研究齿轮振动信号分析过程所涉及到的小波理论的研究，阐述了不同小波变换的工程意义和理论基础。
Secondly, through to study gear wheel vibration signal analysis course related to wavelet theory that arrives research, explain with various wavelet project meanings and theoretical foundation.
最后基于经典控制理论的根轨迹法整定直流小信号调制器参数。
Finally, parameters of the HVDC small signal modulator are tuned based on root locus rules of the classical control theory.
本文根据RKR理论，彩用数值方法比较精确地计算了一氧化碳分子激光器的小信号增益系数。
According to the RKR theory, the fairly accurate small-signal gain in the co -laser operating is calculated using the numerical method in this paper.
根据小波分析理论，针对无源北斗导航定位系统初始校频问题，提出了一种基于小波分析的信号特征提取算法。
According to wavelet analysis theory, a signal picking up algorithm based on wavelet analysis is proposed to solve problem of passive CNS initial frequency calibration.
引入薄环形电子注，首次建立了脊加载同轴膜片圆波导的注波互作用线性理论，得到小信号条件下的色散方程。
The 'hot' dispersion equation of the coaxial ridge-disk-loaded cylindrical waveguide TWT with an annular electron beam can be firstly obtained according to self-consistent field theory.
小波分析已经广泛应用于理论数学、应用数学、信号处理、语音识别与合成、自动控制和图像处理与分析等领域。
The wavelet analysis is applying widely to pure mathematics, applied mathematics, signal processing, speech recognition and synthesis, automation processing and image analysis etc.
它即可用于对母小波的研究和对小波理论的学习，也可用于一些工程信号分析。
It can be applied in studying the property of any basic wavelet and learning the theory on the wavelet transform, and also in making some engineering signal analysis.
小波框架理论是信号处理的一种有效工具，目前已经广泛应用于小波分析、信号分析、图像处理数值计算等理论和应用领域。
Frame theory is one of efficient tools in the signal processing. At present frame theories have been widely used in wavelet analysis, image processing, numerical analysis, etc.
文章给出了基于小波分析的信号奇异性检测理论，通过对突变信号进行小波分析可以发现结构的损伤情况。
The signal singularity detection theory based on wavelets analysis is given. Through the study of those singularity, the damage situation of the structure may be discovered.
基于信号的奇异性检测理论，利用小波分解的高频系数是否具有模极大值作为区分稳态和非稳态现象的判据。
Based on the theory of signal strangeness detect, the maxima modulus in high frequency of wavelet resolving can be used as a criterion to classify steady and non-steady state phenomena.
作为一种数学解析模型，交流小信号模型对于弧焊逆变电源的数字控制器设计具有无法替代的理论指导意义。
As a kind of mathematical analytic model, AC small-signal model is very important to guide the digital control system design.
将小波理论应用到重频分选中，提出了一种新的检测门限，适用于脉冲列分布不均匀的信号环境。
A new algorithm for selecting detecting threshold based on the wavelet theory is presented to the environment when pulse sequences distribute unevenly in the whole sampling time.
根据粒子数密度的计算结果，求解了小信号增益系数，并将该理论计算结果与实验结果进行了比较。
With the calculation results of number density, the small signal gain is calculated. Experimental results are compared with the theoretical results.
首先从理论上验证利用小波变换检测短路信号的可行性和其优越性，为基于小波变换的CO_2焊短路信号DSP检测系统建立了理论基础。
The probability and advantage of the short circuit signal detection of CO_2 welding system by wavelet were tested theoretically, which is the theoretical foundation of the DSP system.
总之，连续小波变换是宽带主动信号检测的数学工具，为宽带信号检测提供了理论和技术的支撑。
All in a word, the CWT is the mathematic tool of wideband active signal detection, and can underpin wideband active signal detection in theoretics and technique.
通过理论分析，证明了闭环系统所有信号是有界的，输出跟踪误差收敛到原点的一个小邻域内。
Through the theoretical analysis, all of the signals in the closed-loop system are proven to be bounded, while the output tracking errors converge to a small neighborhood of the origin.
在谱相关理论和小波变换理论的基础上，提出了小波谱相关方法实现BPS K信号检测与码元速率的提取。
Following the spectral correlation theory and wavelet transform theory, a method named as wavelet spectral correlation method is proposed for BPSK signal detection and chip rate estimation.
本文给出了在环形光纤外腔光反馈之下半导体激光器频偏特性的小信号分析理论。
In this paper a complete small signal analysis for semiconductor laser frequency chirping in the presence of optical fiber ring feedback is presented.
该文在单相电源的基础上建立了多相电源的小信号模型，并利用控制理论推导了系统的传输函数。
The small signal model of the multiphase converter and the transfer function were based on the model of a single channel with a design example showing how to obtain a stable current sharing loop.
根据斜拉桥结构在振动时受损部位的振动信号的奇异性，利用小波奇异性检测理论分析斜拉桥结构在受损时的振动信号，判断结构损伤情况。
Based by singularity of vibration signal of damage position on cable-stayed bridge as vibrating, we can analyze vibration signal when cable-stayed bridge is damaged to estimate structure damage.
基于随机分形理论，采用分数布朗运动模型，应用R/S分析技术和基于小波变换的谱参数估计方法计算地震道信号的赫斯特指数。
The thesis based on random fractal theory, utilizing fractional Brownian motion model, using R/S analysis technique and wavelet transform method to estimate Hurst exponent which dep.
并对目前小波分析理论和应用进行了较为全面的总结，建立了适合于爆破震动信号分析的基小波，同时进行了实例分析。
The authors summarize the theory and application of wavelet analysis, find the basic wavelet for blasting seismic signal analysis, and analyze a concrete engineering example.
本课题基于小波理论设计软件算法，提出了模极值线群方法，抽取心电信号中若干具有临床价值的特征：QRS波群组态及其起点和终点、T波、S-T段。
In this paper, several characteristics of ECG from patients, such as QRS complex and its onset and offset T wave and S-T segment, has been detected using wavelet method.
本文基于数学样条理论提出了一种新的多尺度小波变换，通过其模极值或零交叉可以有效地提取信号的特征。
Based on the B-Spline theory, this paper present a new kind of multi-scale wavelet transform. The feature of a signal can be extracted in its maximum module or zero-crossing.
本文基于数学样条理论提出了一种新的多尺度小波变换，通过其模极值或零交叉可以有效地提取信号的特征。
Based on the B-Spline theory, this paper present a new kind of multi-scale wavelet transform. The feature of a signal can be extracted in its maximum module or zero-crossing.
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