频带

In the context of adaptive filtering, the subband adaptive filtering is known to enjoy a fast convergence rate.

在过去关於适应性滤波技术的研究，都能够发现次频带适应性滤波技术可以享有快速的收敛速度。

In this paper, we use a class of cosine modulated filterbank with approximately reconstruction property for subband adaptive filtering.

在此篇论文中，我们使用近似无频叠失真特性的余弦调变滤波器组来达成次频带适应性滤波。

Based on the SKSwave splitting analysis on the seismic records at 143 broadband permanent and temporary stations deployed in the eastern Tibetan Plateau and its vicinity, we have determined the fast polarization direction and delay time between fast and slow waves at individual stations; the pattern of SKSsplitting fast polarization direction exhibits the flow direction of upper mantles material in the eastern Tibetan Plateau, i.e., the clockwise rotation around the Eastern Himalayan Syntaxis.

根据青藏高原东部及其邻区布设的143个宽频带固定和流动地震台站的远震记录的SKS波分裂分析获得了各台站的快波偏振方向和快慢波之间的时间延迟。

It suggests that for the same circumstances (3.5MHz frequency-division duplex, 3.5GHz band), adding subchannelization, diversity and space-time coding to a base station could increase the coverage range from 2km to 9kma twentyfold increase in coverage and, potentially, in subscribers.

文中提出，对相同的环境(3.5-MHz频分双工、3.5-GHz频带)，在一个基地台中增加子讯息通道化、多样化和空-时编码(Space-time coding)可以把覆盖距离从2公里提高到9公里，覆盖率增加20倍，这意味著潜在用户也增加20倍。

Simulation results show that the coding gain of this scheme can achieve 10 dB at bit-error rates around 10-3 compared with the uncoded QPSK in M fading channels.

仿真结果表明：在适应于北京地区的M衰落信道中，RS码与MPSK相结合方案在不增加频带带宽的前提下，与未编码的QPSK相比较，在Pb=10-3时，可有10 dB的编码增益

In first part, presented large-frequency-range and phase-sensitivity laser vibrometer's general scheme and described the measuring principle and feasibility, based on a survey of transducers calibration methods at home and abroad and the project's index.

对动态计量和传感器校准作了一般性介绍后，本文分成两个部分，分别对该两课题进行详细介绍。第一部分在分析了目前国内外加速度传感器的校准技术和课题指标的基础上，提出了宽频带相位型激光测振仪振动测试总体方案并详细描述了测量原理及可行性的论证。

The Dul'cets'outstanding imaging quality,wide dispersion and excellent focus with in the sound-stage render realistic,out-of-the-box home cinema information as well as rather smooth and properly resolved audio

杜希的优势在于杰出的影像品质，宽广的频带和出色的真实声场展现定位能力，脱离箱体本身的影音信息以及相当平滑和恰到好处的声音重放

A new approach for estimating the miss distance parameters of target was presented based on the extraction of target motion trajectory in space using range-only tracking measurements.

脉间步进频体制脱靶量测量系统发射高距离分辨率的宽频带信号，得到精确的目标距离信息，并通过距离差定位算法获得目标的空间位置。

Its ideal is that modulation mode can be adaptively adjusted by estimating such wireless parameters as fading degree,channel traffic and etc. Channel capacity will achieve a maximum and system performance will be best anytime. By this way,although mobile wireless channel broadband is more and more congesting today,adaptive modulation can be provided preferable spectral efficiency and can be increased the information transmission rate.

它的主要思想是通过研究无线信道的衰落程度、信道流量等参数动态地改变调制方式，在任何时刻都使信道容量达到最大或者使系统性能达到最佳，从而使移动无线信道频带日益拥挤的今天能得到较高的频谱利用率，有效地提高信息传输速率、从而提高传输系统的带宽。

The cavity depth of the structure changed gradually from 70mm to 140mm. The structure has wide frequency range and low frequency absorbing characteristic, can be useful to absorb the diffracting sound over the top structure.

这种结构空腔深度为70mm~140mm，空腔截面逐渐变化，具有吸收低频及宽频带噪声的特点，可以更好吸收顶部绕射声。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。