The principle and design process of the Quadrature Mirror Filter ( QMF) in 16 kbit/ s SB& PC speech compression coding system are discussed. The hardware and software structures for implementing QMF to split band are also given in the paper.

Based on this two channel perfect reconstruction QMF can be designed with higher reconstruction accuracy, whose power complementary is 10~ (-8) dB, while that of the traditional method is only 10~ (-3) dB.

实验证明，由此得到的二通道完全重建QMF组的功率互补对数幅频特性可达10~（-8）dB，而传统方法仅能达到10~（-3）dB，具有很高的重建精度。

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Quadrature mirror filters ( QMF) are often used in sub-band coding to eliminate aliasing between sub-bands.

子带编码中，广泛采用正交镜像滤波器（QMF）消除各子带谱的混叠。

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With the design result, QMF banks are optimized further via Genetic Algorithm, thus the performance of QMF banks approximates perfect reconstruction, and the simulation result is listed.

然后，以初步设计好的QMF组系数为初值，通过遗传算法对系统进一步优化设计，从而使QMF组性能进一步提高，接近准确重建的目标。论文的最后给出了优化前后的模拟仿真结果。

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The approximate solution of the equation of motion and the general diagram of acceptance for 100% ion transmission in QMF

四极滤质器中离子运动方程的近似解法及100%传输时的接受相图

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The fast wavelet transform ( FWT) algorithm in wavelet analysis was introduced in the paper. With quadrature mirror filters ( QMF) associated with popular wavelet bases, the fast wavelet decomposition and reconstruction for signals were implemented.

介绍了小波分析中的快速小波变换算法，通过与常用小波基相对应的正交镜像滤波器组，实现了对信号的快速小波分解和重构。

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The correct CCSID identifies the coded character set that is supported by your site's I/ O devices, local applications such as IMS and QMF, and remote applications such as CICS Transaction Server.

正确的CCSID指定您站点的I/O设备、诸如IMS和QMF等本地应用程序以及诸如CICS Transaction Server等远程应用程序所支持的编码字符集。

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A scheme for layered color image coding based on subband decomposition is proposed, in which color image can be divided into several subbands with different frequency through QMF ( Quadrature Mirror Filters) and coded for these subbands individually.

提出了一种基于子带分解的彩色图像分层编码方案，它通过正交镜像滤波器组把彩色图像分成不同频率的子带，并对其分别进行编码。

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Based on the design principle of QMF, the design of high order QMF is transformed into a problem of optimization with single vocable.

根据FIR正交镜像滤波器设计的基本原理，将高阶正交镜像滤波器的设计问题转换为单变量的优化设计问题。

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The QMF in 16 kbit/ s SB-APC Speech Compression Coding System

16kbit/s分带自适应预测语音压缩系统中的正交镜象滤波器

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Discrete wavelet transform has tight relationship with filter banks in born. Multi-resolution analysis showed QMF banks are equivalent to quadrature wavelet transform.

滤波器组理论与离散小波变换有着天然的联系，正交小波多分辨分析理论明确地指出共轭镜像滤波器完全刻画了标准正交小波变换，而且快速离散小波变换可以通过级联这些共轭镜像滤波器运算来实现。

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This paper studies the transformation of phase diagrams of acceptance in QMF by using the general form of the solution of ion motion equation. The transformation rules of the diagrams in the fringing field and delayed DC ramp are obtained.

本文采用离子运动方程解的一般形式来分析四极滤质器中接受相图的变换，得到边缘场和直流延迟装置对接受相图的变换规律。

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Ion trajectories in QMF are computed, displayed and drawn using an IBM-PC. Various factors affecting trajectories of ions are discussed and some new results are obtained.

本文利用IBM&PC微型计算机，计算、显示并绘制出四极滤质器中的离子轨迹，讨论了影响离子运动轨迹的各种因素，得到一些新的结果。

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On the z/ OS platform, DataQuant can be deployed independently or as an extension to QMF, where objects such as queries and forms may be jointly created and shared.

在z/OS平台上，DataQuant可以独立进行部署，或是作为QMF的扩展进行部署，其中的查询和表单等对象可以一起创建和共享。

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The experimental result indicated that the reconstruction error of QMF banks after optimization is controlled in2%, indicates this method the validity.

实验结果表明，优化后QMF组的重建误差控制在2%以内，表明该方法的有效性。

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Design of electrical pan/ tilt and lens step serial controller in explosion with a preset memory function

一种带预置存储功能的防爆电动云台镜头步进串行控制器设计

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Characteristics Analysis of the Image Tilt in LOS Stabilization Action of Periscope Instrument on Moving Platform

动基座潜望式仪器瞄准线稳定时像倾斜的特性分析

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Reed switch; Proximity sensor; Float Sensor; E-bike Brake Switch; Reed Relay; Flow Switch; Tilt Sensor Switch; Vibration Sensor Switch; Centrifugal Force Sensor Switch.

干簧管； 接近开关； 浮球开关； 电动车刹车开关； 干簧继电器； 水流开关； 角度开关； 震动开关； 离心力开关。

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To switch to the horizon view, you can tilt the phone up or down.

要切换到地平线视图中，您可以电话倾斜向上或向下。

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The use of more secure and convenient. No need to tilt 45 degrees, without having to manually switch.

使用更加安全、方便。无须倾斜45度，无须手动开关。

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The platform is quite simple, relatively unexpensive, and very safe, so it provides an excellent experimental platform for research on tilt rotor aircraft.

另外，该平台是一个高阶非线性系统，在一定程度上像倾转旋翼机，为更进一步研究倾转旋翼机提供了很好的实验平台。

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