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1)  the methods based on linear filtering
线性滤波器法
2)  Linear filter
线性滤波器
1.
Employing the fundamental principle of linear filter model,an improved simulation method is developed based on a high-order filter model for randomly undulatory sea surface.
根据线性滤波器模型的基本原理,提出了一种改进的基于高阶滤波器的随机起伏海面仿真方法。
2.
Based on analyzing the existed scanner model,a promoted model is proposed for better imitating the processing of scanner,in which the method of computing a linear filter is promoted,the filter is used to mimic the picking up pixel of scanner.
为了能够更好地模拟扫描仪对图像的扫描过程,在分析现有打印机和扫描仪模型的基础上,提出了一种改进的扫描仪模型,主要为改进模拟扫描仪采集数据点过程的线性滤波器。
3.
A linear filter of arbitrary frequency with arbitrary bandwidth can be available by adjusting two parameters.
通过调整2个系统参数,可实现任意频点和任意带宽的线性滤波器。
3)  linear filtering method
线性滤波法
1.
Time history simulation of turbulent wind speed near an actual building was conducted by using the weighted amplitude wave superposition(WAWS) method improved with FFT algorithm and the linear filtering method of auto-regression(AR) model.
采用经过FFT算法改进的谐波叠加法(WAWS)及自回归(AR)模型的线性滤波法对实际工程进行脉动风速时程模拟。
2.
According to the basic theories of harmony superposition method and linear filtering method,the numerical simulation of wind velocity time history for long-span spatial lattice structure was realized by programming with MATLAB language in such methods as harmony superposition method,FFT-updated harmony superposition method,interpolation method,and auto-regressive method of linear filtering method.
根据谐波叠加法和线性滤波法的基本原理,采用MATLAB语言编写程序分别实现了常规谐波叠加法及其改进的快速傅里叶变换算法和插值算法以及线性滤波法的自回归法对大跨度空间网格结构风速时程的数值模拟,并模拟了2个工程实例的风速时程。
3.
According to the numerical simulation methods of wind load in the latest years,the development process of the method is expounded,and the harmony superposition method is introduced briefly,as well as the linear filtering method,the wavelet analysis\'s basic principles in the numerical simulation of wind load and some problems existed.
通过对近年来风荷载模拟方法的总结,简单论述了其发展历程,并简要介绍了谐波叠加法、线性滤波法以及小波分析在风荷载模拟中的基本原理以及其中存在的一些问题。
4)  direction based wavelet transform filter
小波线性滤波器
1.
In this paper two filters are designed for layer layer 3D profilometer, which are recursive median filter and direction based wavelet transform filter.
文中提出了一种新型的递归中值滤波器,将滤波算法转化为一种优化处理,兼顾了滤波处理的光滑连续性及抑制噪声的累积特性,可有效地消除脉冲型干扰的影响,并对该算法进行了分析,为消除加性高斯噪声,提出了一种小波线性滤波器,它仅仅处理边缘信息,克服了边缘模糊效应,小波的去噪逆向重构的处理方法,对边缘为阶跃型的层析图像非常实用。
2.
Two filters are designed for layer layer 3D profilometer, which are recursive median filter and direction based wavelet transform filter.
为消除加性高斯噪声,提出了一种基于图像边缘方向的小波线性滤波器,它仅仅处理边缘信息。
5)  nonlinear filter
非线性滤波器
1.
Then,a low-pass nonlinear filter and a high-pass nonlinear filter are introduced to optimize the objective function which is determined by the car body vertical acceleration and the suspension travel.
采用增加高低通非线性滤波器的方法,对以车身垂直加速度和悬架动行程为目标的控制函数进行优化处理,并利用多滑模鲁棒控制方法,设计了一种主动悬架的非线性路面自适应控制器。
2.
In order to overcome the drawbacks of traditional Discrete Nonlinear filter fast Algorithm of Digital Image: heavy computation,this paper raises a new wavelet fast algorithm,which can be used to design a nonlinear filter.
文中针对传统数字图像离散序列非线性滤波器算法中运算量大的缺陷,提出了一种新的基于小波变换的数字图像离散序列非线性滤波器计算方法。
3.
An image nonlinear filter based on Partial Differential Equations (PDE) has good performance, but it consumes large time and resource.
仿真实验结果表明,CNN-PDE非线性滤波器取得了满意的滤波效果,用CNN实现PDE非线性滤波器的方法是有效可行的。
6)  linear phase filters
线性相位滤波器
1.
Design of linear phase filters based on frequency sampling method and Matlab simulation;
基于频率采样法的线性相位滤波器设计及Matlab仿真
补充资料:波数字滤波器
      由两端终接电阻负载的无源LC梯形滤波器导出的一种数字滤波器结构。应用双线性变换S=k(1-Z-1)/(1+Z-1)可将用波参数描述的无源元件,实现为数字元件。表1列出了无源元件R、C、L及其对应的由延时单元、乘法器和加法器构成的数字元件。
  
  
  通常高阶递归型数字滤波器的级联型或并联型有产生极限环振荡的危险。此外,在输入信号非常小时,由于舍入误差的高度相关,也可能导致数字滤波器的不稳定而产生固定振荡。1971年,提出波数字滤波器的伪无源性概念,并论证了这种数字滤波器的低灵敏度特性。波数字滤波器具有良好的稳定性,可以用较短的系数字长实现,有良好的动态范围,不会出现极限环振荡(即在环路情况下应用也不会出现任何杂散振荡)。这种数字滤波器特别适用于通信系统。
  
  在波数字滤波器结构中,用波参数描述的元件,在联接时必须遵从端口间阻抗匹配的原则。相应地,数字元件之间的联接按其为串联或并联分别采用由乘法器和加法器构成的串联适配器或并联适配器匹配联接。适配器符号及其对应的联接关系见表2。图为三阶椭圆型低通LC 梯形滤波器及其等效的波数字滤波器。  波数字滤波器的另一种结构称为波格型数字滤波器,是由对称型或格型无源LC 滤波器导出的。
  
  

参考书目
   A. Antonious, Digital Filter : Analysis and Design,McGraw-Hill Co.,New York,1979.
  

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