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DynamicPowerQualityTestingTechnology
- 本文首先介绍了有源电力滤波器的基本结构和工作原理，并对一些常规的谐波电流检测方法的优缺点进行了比较。其次，针对传统的谐波电流检测方法的缺陷，提出将神经网络与基于噪声抵消原理的自适应谐波检测相结合，利用径向基函数运算量小、收敛快、无局部极小值等优点，构造了一种基于径向基函数神经网络的谐波电流检测方法，仿真结果表明该检测方法具有很好的动态响应及畸变电流检测精度。最后，设计了一套实验系统，对本文所采用的系统方案进行了实验验证。仿真表明，本文所采用的有源电力滤波器检测系统方案切实可行，能够较好地实现动态
Speech_Enhancement_Using_Sub-band_Spectral_Analysi
- 提出一种有效的语音增强算法，该算法使用重叠相加FF-r滤波器进行谱幅度估计，给出噪声估计的两个均值参数，此参数适用于任何噪声．而且进行噪声估计无需检测语音间隙，无需VAD的运算过程，克服了单信道噪声 压缩算法的缺点．-An effective speech enhancement algorithm using the overlap-add FF-r filter in spectral amplitude estimation, given the noise mean estimate
Waveletanalysisusingsofthresholdingfilteringinlect
- 在采集信号时,如果传感器没有前置放大, 则传感器输出的压电信号的信噪比会比较低。本文利用小波域软阈值滤波方法对未采用前置放大而采样得到的 信号进行小波分析,大幅度地提高了信号的信噪比,提取的目标信号位置与理论位置吻合的很好。这表明可以通 过小波分析方法很好地改善热超声信号的信噪比,从而降低对微波致热超声成像采集系统中前置放大器的要求-When human tissue is irradiated by microwave pulses, there is thermo2acoust
wxdh
- 通过设置和实际情况相接近的干扰信号、期望信号以及噪声信号参数，来仿真采样 矩阵求逆算法、单星约束下的最小输出功率算法、单星无约束下的最小输出功率 算法分别于单星信号在单个宽带干扰信号、单个窄带干扰信号和复杂电磁干扰信 号存在时的干扰抑制性能，得出在强干扰条件下算法由优到劣的顺序是采样矩阵 求逆算法、单星约束下的最小输出功率算法和单星无约束下的最小输出功率算法， 弱干扰条件下单星无约束下的最小输出功率算法失效等结论。-By setting and close to the ac
Engineering-Noise-Control--Theory-and-Practice.ra
- The recognition of noise as a source of annoyance began in antiquity, but therelationship, sometimes subtle, that may exist between noise and money seems to be a development of more recent times. For example, the manager of a large wind tunnel once t
URSI_GASS_2011_short
- Compressed sensing, a method which relies on sparsity to reconstruct signals with relatively few measurements, has the potential to greatly improve observation of distributed radar targets. We extend the theoretical work of others by investigatin
64483
- The following Matlab project contains the source code and Matlab examples used for 1d blaise filter for quick smoothing without curve fitting toolbox. This is an old filter I used before enjoying more sophisticated options Matlab now offers. Easy to
FSK
- 2FSK的调制与解调代码，不用matlab里面的函数，自己写出来的仿真程序，加了噪声和滤波器。仅供学习交流。-2FSK modulation and demodulation code, without the function of the inside of the MATLAB, write out the simulation program, plus the noise and filter. Only for learning exchange.
motors1
- Abstract—This paper presents a new 12-step sensorless drive for brushless dcmotor based on back-electromotive force (back-EMF) differences, which are estimated the disturbance observer (DOB) structure. Availability of rotor position information
VMD-Parameter-Estimation
- 变分模态分解在信号分解精度和噪声鲁棒性方面具有明显优势，但需预先确定模态数K，而目前K 只能靠先验知识进行预估，如果预估的K 与实际信号存在差异，会导致分解误差较大。针对以上问题，利用EMD 不需预先设定模态数的自适应分解特点，通过对EMD 分解结果的分析，进行VMD 分解模态数的估计，并通过仿真信号分析及滚动轴承故障信息提取-Variational modal decomposition has obvious advantages in signal decomposition accura
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- 正在成像的物体的光谱反射率的重建对于在各种观察光源下再现颜色是重要的。在这项工作中，导出了一个简单的公式来评估一组旨在重建光谱反射率的彩色图像传感器的质量，并将其应用于多光谱图像采集系统。由于质量不仅取决于光谱灵敏度，还取决于系统中存在的噪声，所以不可能在没有其中存在噪声的情况下对一组传感器进行评估。因此，多光谱相机的噪声方差由新方案估算，并首次应用于评估。结果表明，实验结果与评估模型的预测吻合良好，估计噪声方差估计方法对评估是有用的。(The reconstruction of spectra
朗之万方程的应用
- Brownian motion of particles suspended in a fluid is studied, and expressions derived for the particle diff usivity and velocity autocorrelation function. The theory of thermal noise in a general linear system is applied to both the particl