查询词典 filter

This paper analyzes the frequency characteristics of comb filter and the principle of using comb filter as decimation filter.

文章分析了梳状滤波器的频率特性及其作为抽取滤波器的原理，特别指出了此种滤波器具有对Σ－△调制器成型的量化噪声的频谱形状保持不变的特性。

Secondly, the platform of IPTV set-top box named DM6446 is introduced, and then the AVS video coding standard which is implemented as the video coding standard of IPTV is introduced. The kernel architecture, peripheral devices of DM6446 and the key technique of AVS video coding such as transformation, quantization, intra-prediction, inter-prediction, interpolation, and loop filter is introduced in detail. Thirdly, the system procedures of set-top box which are implemented on the ARM side of DM6446 are introduced in detail. This part focuses on the demultiplex of audio and video data, the design of data interface, the playback of audio and video, and the communication between ARM and DSP. Fourthly, the loop filter algorithm of AVS video coding standard is introduced in full detail, and the optimized procedures of the algorithm on the DSP side of DM6446 are introduced, and then the optimized results are presented. Fifthly, the thesis introduces and analyzes the state-of-art technique of deblocking filter, and proposes a deblocking method, and then the results of proposed method are given. Finally, summarize of this thesis and further development is given.

首先对IPTV技术、视频编解码技术以及去块滤波技术做了简要介绍；然后介绍了IPTV机顶盒的实现平台DM6446，并介绍了该处理器的外围接口和内核结构，同时介绍了作为本IPTV系统视频标准的AVS第二部分视频标准，以及该标准中变换量化、帧内预测、帧间预测、插值和环路滤波等多个模块的算法；接着，详细介绍了机顶盒系统相应程序在DM6446 ARM核上的实现，重点介绍了音视频系统码流的解复用、数据接口设计、音视频的播放以及ARM核与DSP核之间的通信；然后，详细介绍了AVS视频标准中环路滤波算法及该算法在DM6446 C64+内核上的优化，并给出优化结果；然后对去块滤波算法进行了研究并提出了一种环路滤波方案，同时给出了此方案的实验结果；最后总结了本文的工作，并提出了可以改进的方向。

This ceiling-buried air conditioner comprises a grill frame 3 having an outlet port 6 and a suction port 5 provided at the lower end of a body 2 to be buried in a ceiling, a suction grill 4 provided on the suction port of the grill frame 3, a pre-filter 8 for purifying sucked air detachably set on the suction grill 4, and a lifting device 12 capable of lowering the suction grill 4 and the pre-filter 8 integrally to a filter replacement position.

其在埋设于顶棚内的主体(2)的下端设置具有排出口(6)和吸入口(5)的格栅框(3)，在该格栅框(3)的吸入口(5)上设置吸入格栅(4)，在该吸入格栅(4)上可拆装地设置用于净化吸入空气的粗滤器(8)，并设置可使所述吸入格栅(4)和粗滤器(8)整体地下降到更换过滤器的位置的升降装置(12)。

It has Hardware Filter (Promiscuous, All Local, All MultiCast, Broadcast, Directed, Function, Group, Source Routing etc), and Software Filter (it is able to filter based on Protocols, IP source/destination, port, MAC source/destination, data pattern).

它的硬件过滤器（滥交，所有地方，所有的多播，广播，指示，功能，组，源路由等），和软件过滤器（它能够过滤器的基础上协议， IP的源/目的地，港口，陆委会源/目的地，数据模式）。

LC filter is an important part of this hybrid reactive power dynamic compensation. The parameters of capacitor and inductive winding of LC filter change during operation with the changing surrounding temperature, the self-heating and the insulation ageing of capacitor, etc. During the installation and commissioning, there may exist errors that can deviate the actual parameters and correspondent harmonic oscillation frequency from the designed value and result in filter disarrangement.

LC滤波器是动态无功补偿装置中的重要组成部分，由于它的电容器和电感线圈参数，在运行过程中会因周围温度的变化、自身发热和电容器绝缘老化等因素影响而发生变化，在安装和调试过程中会存在误差，从而使实际参数和相应的谐振频率偏离设计值，导致滤波器失谐，这就要求对滤波器进行优化设计。

By defining a discriminability function and utilizing some images with synthetic defects, a parameter selection method is proposed to adapt to various fabric types when the Gabor filter bank is applied in defect segmentation. It is argued that only the real part of Gabor filter works during segmentation; the radial orientation can be limited to horizontal and vertical direction; the radial frequency and the length of the FIR filter should depend on the basic frequency of the fabric texture.

本文通过定义分辨力函数，以合成疵点图像为研究对象，提出了在实时应用中对各种不同的纹理图像能快速确定Gabor滤波器组参数的方法：疵点分割中只需用到实Gabor滤波器；方位角只需取水平和垂直方向，径向中心频率和FIR滤波器长度的选取依赖于布面纹理的固有频率。

This thesis presents the latest development of nonlinear filtering theory and the appliance of Divided Difference Filter, Unscented Kalmen Filter and Particle Filter in non-cooperative bistatic radar positioning and tracking system.

本文介绍了非线性滤波理论的最新进展，把DDF滤波器、UKF滤波器和PF滤波器应用到了非合作式双基雷达的定位跟踪中。

This error will limit the application of the IF filter, but there are still lots of benefits in the low-Q IF filter design. The GM-C filter that is designed by this suggested methodology has a lot of benefits.

此一误差限制了本文所提出的滤波器使用范围，但在 Low-Q 滤波器应用上具有多方面的优点。

Study on application and simulation of Kalman filter technology in SINS Because Kalman filter some merits, such as provided a fast and accurate method for SINS, adopting it to do initial alignment in this paper. The Kalman filter theory is introduced and the dynamic error vector equation of the initial alignment is derived at the first. Using velocity error as exterior value of observation, maneuverable characteristic that is influenced with system's observability and its degree is studied at length by do amount of simulations and experiences.

首先介绍了卡尔曼滤波理论及相关技术，建立了系统卡尔曼滤波的状态方程和观测方程；首先采用速度误差作为观测值，详尽的研究了系统机动特性对可观测性和可观测度的影响，并做了大量仿真实验：通过对滤波原理的分析研究了影响的原因；分别选用加速度计输出误差和转台输出姿态角误差作为外部观测值，推导建立它们的观测模型，并通过仿真证明了分析结论的正确性。

Xi′an Node Science Technology Co.Ltd.,Xi′an,710075,ChinaAbstract:In this paper,a new variable interpolated filter in DVB-S(Digital Vidoe Broadcast by Satellite) is introduced based on the common filter of cascaded integrator comb.Firstly a CIC filter module with interpolation factor 2 is designed,then we could reuse the basic module according to the interpolation factor.

摘 要：在数字上变频中常用的CIC滤波器的基础上，提出了一种适用于DVB-S系统的可变插值率CIC滤波器的实现结构，首先实现一个内插因子为2的CIC滤波器单元，然后根据不同的内插因子要求，来重复地调用这些内插因子为2的基本滤波器模块，这种CIC滤波器的实现结构符合结构化的设计思想。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。