滤波器

By adding an equivalent harmonic impedance in the branch circuit of power grid, this HAPF could force all the harmonic currents flow into passive power filters, which resulting in eliminating harmonic contamination more effective. And using the capacitive feature of PPF in the fundamental frequency, this HAPF could compensate fixed-capacity reactive power without increasing APF's burden. Moreover, in order to decrease APF's cost, the fundamental voltage will largely be endured by capacitor in view of the series resonance circuit tuned at the fundamental frequency, so the APF just bears little harmonic voltages.

其基本工作原理是：有源部分等效于在电网支路中串联了一个谐波阻抗，该谐波阻抗对基波电流不起作用，而对谐波电流产生很大阻碍作用，迫使谐波电流流入无源滤波器，从而达到滤除谐波的目的；同时新型注入式混合有源滤波器还充分利用了无源滤波器的无功补偿功能，在不增加有源部分容量的前提下，可以提供一定容量的无功功率；由于有源部分承受的电网基波电压不大，也没有基波电流流入，因此逆变器容量小，初期投资较小。

In order to optimize performances of shunt active power filter of harmonic compensation, attenuation ratio for switching ripple, stability and power losses, an improved LCL filter topology was presented based on the analysis of the frequency characteristics of the LCL filter, in which a switching-ripple shunt branch and a series-inductor were adopted to the damping resistor to reduce the power losses dramatically.

为了使并联有源滤波器谐波电流补偿性能、开关纹波衰减率、系统稳定性和功率损耗等方面性能得到系统的折中和优化，提出了一种改进型LCL滤波器拓扑，该结构充分利用了LCL滤波器的频率特性，在阻尼电阻两端引入开关纹波谐振分流支路，同时在阻尼电阻上串联一小电感，有效的减少了阻尼电阻的损耗而不改变系统的静态和动态性能。

The traditional method is that the impulse response of filter can be gotten by optimization under the perfect reconstruction condition.

传统的研究方法是在满足滤波器组完全重构的情况下通过寻优的方法得到滤波器的冲击响应，所得到的滤波器性能较差。

The new filter not only has the advantages of the incoordinate interval filter, which can solve the local filter\'s problem that the different navigation device measurements have different periods in real system ,but also has the advantages of preventing distortion of filter which caused by the imperfect arithmetic method or the incorrect statistical characteristic of noises.

对MINS/北斗/GPS多传感器信息融合算法进行了研究，提出了一种改进的非等间隔联邦滤波器，这种滤波算法除了具有非等间隔联邦滤波器的优点即可以解决各局部滤波器的量测信息的周期不同外，还具有抑制因计算方法不完善或系统噪声统计特性不确切而引起的滤波发散的功能。

A method of designing microstrip line interdigital filter is proposed.

针对信道化接收机的10～12GHz滤波器，研究微带交指滤波器的实现，提出一种设计微带交指滤波器的方法。

It gives an amplitude spectrum as the inverse of a biased amplitude spectrum of the CHF, and a phase spectrum as the phase spectrum of the CHF.

该滤波器的振幅是圆谐滤波器的振幅谱加偏移量后的逆函数，位相是圆谐滤波器的位相谱。

Low-up-middle filter, LUM filter for short, is a kind of nonlinear filter developed on the basis of middle filter.

低-高-中滤波器(Lower-upper-middle filter，简称LUM滤波器)是中值滤波基础上发展起来的一种非线性滤波器。

The main architecture of multiple WPANs accessing the HAN is proposed. The medium access control-level coordination solution applied in the access point for the coexistence of different communication protocols within WPAN is discussed. The diagram of the adaptive FRESH filter is described. The anti-interference models of the FRESH filter in the scenario of multiple WPANs accessing the HAN are proposed. The minimum mean square error convergence property of the FRESH filter with the change in data point number is analyzed.

描述了多个无线个域网接入家域网的总体结构，讨论了应用于接入点的媒体访问控制(medium access control，MAC)级协作解决方案以保证多个无线通信协议共存于一个无线个域网内，给出了自适应频移滤波器的框图，提出了在多个无线个域网接入家域网场景中频移滤波器的抗干扰模型，分析了频移滤波器最小均方误差随数据积累点数变化的收敛性能。

The grayscale morphological filter has close connection with order statistic filter. Both of them are one of stack filters in essence.

多值形态滤波器与排序统计滤波器有着密切的联系，它们本质上是层迭滤波器的特殊情况。

Firstly, based on general equivalent circuit model for coupled resonator filters, the synthesis is discussed using the orthogonal transformation of the coupling matrix.

首先，通过分析交叉耦合谐振滤波器的等效电路模型，给出了滤波器电路参数与散射参数之间的函数关系和利用正交变换综合设计滤波器的方法。

Life. But the intrinsic way of the Internet by wire confines accessing and using of the network information.

然而，Internet固有的有线连接方式大大限制了人们对网络信息的访问和使用。

I have a strong persuasion that this is true .

我坚信这是正确的。