低通滤波器

The preparation of matlab trapezoidal low-pass filter and image of the effect of drawing the contrast to compare before and after filtering Fig.

详细说明： matlab编写的梯形低通滤波器对与图像的影响，画图比较滤波前后的对比图。

Then the creative research work on ultra-low frequency and large amplitude elcectromagnetic vibrator based on moving magnet is done, improving exciting signal at ultra-low frequency, and, the theoretic analysis and experiment model are studied. Thus, the reference for establishing ultra-low frequency standard vibrator in future is provided. In chapter 5, two control strategies for ultra-low frequency standard vibrator test table waveform are studied.

首先采用机械振动隔振理论，研究设计了机械低通滤波器来滤除噪声信号，并运用等效的小振级信号进行了实验研究，得出了有益的结论；然后为提高超低频时激振信号，作者创造性地提出了动铁型大位移的电动振动台结构，进行了理论分析和实验模型研究，为将来建立大位移的超低频标准振动台提供了参考。

Bilinear Z transform with the design of IIR Butterworth digital low-pass filter, ECG can be achieved in the removal of random noise.

详细说明：用双线性Z变换法设计IIR巴特沃思型数字低通滤波器，能够实现心电信号中随机噪声的去除。

E. ,1. When s tends to infinity, the function tends to zero , so that is a low-pass filter.

E。 ，1。当s趋向到无限时，作用趋向到零，因此是一台低通滤波器。

It produces a voltage, which has equal amplitude and opposite di rection against the distortion voltage contained in power system with PWM invert er, and then it is injected to network through transformer by lower-pass filter.

它利用PWM逆变器产生与电网畸变电压大小相等、方向相反的脉宽调制波，经低通滤波器滤除开关纹波后通过变压器串联在电网中，以达到稳定负载端电压、改善电能质量的目的。

Gaussian-smoothedfilter is a lowpass, and it controls the lilting effect by 0, and the bigger iT is, the better thefiltering effect becomes.

高斯平滑滤波是一个低通滤波器，它通过口来控制滤波效果，σ越大，滤除噪声的能力就越强。

The integral sliding mode control is used in APF system to get the switch command of the IGBT.

而且积分滑动模控制相当于在控制器前加入了低通滤波器，能有效的解决传统滑模控制的抖振问题。

From point of view of Fourier theory, an optical system behaves as a low-pass filter which debars spatial frequency information about the object beyond the diffraction limit cut-off frequency.

按照傅立叶光学的观点光学系统是一个低通滤波器，其传递函数在由衍射极限分辨力所决定的截止频率以上值均为零，因此图像截止频率以上的能量和信息被丢失。

Defected ground structure ; defect parameters ; lowpass filter ; sharpness factor ; selectivity

缺陷地结构；缺陷参数；低通滤波器；陡峭因子；选择性

The invention relates to a parameter probe which is used to measure plasma body suspension potential and comprises an electrode (1), a low pass filter (2), a high resistance (3), an I-V converter (4), a data acquisition board (5), and an industrial control computer.

本发明涉及一种用于测量等离子体悬浮电位的参考探针，由电极(1)、低通滤波器(2)、高阻(3)、I-V变换器(4)、数据采集卡(5)、工业控制计算机(6)组成。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。