低通滤波

在生物多道记录仪内，采集到的电信号经过不同类型的放大、滤波（包括高通滤波、低通滤波、特定频率限波）等处理。

Inside the multi-channel recorder , the collected electrical data are amplified and filtered through different types ( including HPF , LPF and limit waves in specified frequency ) .

针对本系统的工作环境，采用低通滤波及短路环技术等减小干扰。

LPF and short circuit ring is used to decrease interference .

利用MATLAB对彩色图像进行低通滤波

Using Low-pass to Filter the Color Image in MATLAB

FIR数字低通滤波的物理解释

The Physical Explanation of FIR Digital Low Pass Filter

基于混合结构导频和FFT低通滤波的OFDM信道估计混频滤波式频率合成器

Study on channel estimation based on hybrid type pilot and FFT lowpass filtering for OFDM

采用基于B-SplineSnake模型和低通滤波的演化算法来实现对视频目标的跟踪。

With the algorithm using low frequency pass filtering based on B-Spline Snake model .

低频子带是通过对原始图像进行2-D低通滤波而得到。

The LF subband is created by filtering the original image with a 2-D low-pass filter .

在Fourier频谱空间研究了数字图像显示的拼面效应，它表现为低通滤波。

The mosaic effects of digi-tial image display in the Fourier spectral doman are investigated , it is a kind of low-pass fil-tering .

APF谐波电流检测的积分法与低通滤波法的比较研究

Comparison Research on Integral Method and Low Pass Filter Method of Harmonic Current Detection for APF

给出了插值滤波，抽取滤波，FIR低通滤波，匹配滤波（DMF），数控振荡器及相关应用模块的详细设计过程和实现结果。

Recounted design approach and result of filter such as decimation filter , interpolation Filter , low pass filer .

硬件的设计部分主要由信号放大电路、低通滤波电路，AD转换电路，串口通信以及显示电路等模块构成。

The mainly components of the device hardware are signal amplification circuit , low-pass filter circuit , AD converter circuit , serial communications and display circuit modules .

在分析DEM数据误差源的基础上，采用低通滤波的方法消除DEM数据随机误差。

The main work of the paper are : 1 . Using lowpass filtering to eliminate the Random Error of DEM data .

提出了一种新颖的基于低通滤波控制特性的AFC系统。

A novel AFC system based on low-pass filter property is presented in this paper .

分析数字滤波对改善PID控制性能的作用，介绍了用算术平均滤波和一阶低通滤波实现的改进型PID控制的数字算法，并给出仿真的结果。

This paper introduces the digital algorithm to improve the PID control using arithmetical averaging filtering and first order low pass filtering . The result of simulation is also illustrated .

Hanning低通滤波在PSD法测量直管不直度中的应用

Application of Hanning Low pass Filter for the Measurement of Non straightness of Straight Tube with PSD

在一定范围内，CD随计算点长的增加和采样频率的下降而升高，随低通滤波频率的下降而降低；

Within a certain range , CD value increased with the increase of calculating points , the decrease of sample frequency , and decreased with the decrease of low-pass filt frequency ;

在图像预处理阶段，采用3D平滑高斯模板进行低通滤波，有效地消除了图像的量化噪声，提高了相邻像素的相关性。

In the stage of image preprocessing , the image quantization noise is eliminated and the correlation between adjacent pixels is improved effectively by using the low-pass filter base on templates of 3D Gaussian smoothing .

利用光热折变玻璃（Photo-ThermalRefractiveGlass，PTRGlass）透射型体光栅，完成了对空域畸变高斯光束的空间低通滤波实验。

Using the transmitting volume grating recorded in Photo-Thermal Refractive glass ( PTR glass ), the low-pass spatial filtering of the spatially-deformed laser is realized .

对得到的数字水印图像进行添加噪声、JPEG有损压缩以及低通滤波等处理.实验结果表明：基于混沌序列的DCT域数字水印算法所获得的水印对常见的图像攻击具有较好的稳健性。

Experimental results show that the watermarking is robust to common image attacks such as noise , JPEG lossy compression and lowpass filtering , etc.

硬件系统是以单片机为核心的集成控制电路，主要功能包括：传感器信号的实时采集，二阶低通滤波，助力扭矩的PWM控制，H桥电路驱动直流电动机以及离合器控制等；

The hardware was an integration control circuit , the fuction of which including : signals collection , low band fliter , PWM singal output , H-Bridge circuit , clutch control and etc.

本文用二维FFT方法，并配以多种低通滤波函数，有效地消除了条纹图中的散斑颗粒。

In this paper , a method , in which 2 D FFT and low pass filter are used , is proposed to eliminate the speckle noise .

该系统主要包括：以FPGA为核心的时序控制电路和数字信号通信电路、巴特沃斯低通滤波电路和模数转换等电路。

The system includes sequential control circuits and digital signal communication circuits with the core of the FPGA , Butterworth low pass filter circuits and analog digital conversion circuits and so on .

实验表明本算法对通常的音频信号处理，如MP3音频压缩、低通滤波等具有较好的稳健性。

The experimental results show the algorithm is robust against common audio signal processing such as MP3 audio compression , low-pass filtering , etc.

与MP3音频压缩、低通滤波等常规的音频信号处理攻击相比，同步攻击更加难以抵抗，已经成为研究界的一个公开难题。

Compared with common audio signal processing attacks such as MP3 compression , low-pass filtering etc. , they are more difficult to manage .

结合了运动图像处理的特点，选用了一种基于Kalman滤波理论的时域递归低通滤波来进行背景提取和背景更新。

Based on the features of motional image processing , a method of temporal recursive lowpassed filter based on Kalman filter theory was adopted to subtract and update the background .

对QPSK调制算法及均方根升余弦低通滤波算法进行了详细论证；高性能升余弦滤波器设计

Secondly , the algorithm of QPSK and Root Raised Cosin are discussed ; High Performance Raise Cosine Filter Design

第二章介绍了系统的总体设计方案，它主要由脉搏信号预处理、信号放大、低通滤波、AD转换、串行通信、波形显示等几部分组成。

It introduces the overall design of the system in chapter two , formed mostly with precondition of pulse 、 enlarge signal 、 Low-Pass Filter 、 AD Conversion , Serial Communication , waveform showing etc.

系统中信号检测与处理部分研究内容包括：三极管开关驱动电路、光电接收电路、前置差分放大电路，数字式取样积分器的软件实现和PWM信号低通滤波处理。

Thirdly , the signal detecting and processing section includes switching drive circuit , design of photoelectric transformation and preamplifier , the realization of digital sampling integrator and PWM signal low-pass filter .

为了提高音频质量，在驱动程序中利用高效的KaiserWindow低通滤波算法对不同采样频率的音频流进行重采样。

Firstly , in order to improve audio quality , Kaiser Window lowpass filter algorithm is used to resampling audio signals with different frequencies which can reduce the noise furthest .

在对电流信号进行αβ变换和dq变换的基础上，利用数学形态滤波器良好的低通滤波特性，提出了一种基于数学形态学的谐波电流检测方法。

A mathematical morphology ( MM ) detection method based on αβ and dq transformation is proposed to detect three-phase current harmonic components .