频带

This thesis presents a multi-band voltage-controlled ring oscillator via the multiple-pass connection, resulting in a wide range of oscillation frequency.

本论文提出一个具有多频带的电压控制环型振荡器(Voltage-Controlled Ring Oscillator)。

Being associated with three research projects, this dissertation makes deeply insight into the fast and accurate analysis, optimal design and manufacture of HF and VHF/UHF broadband omnidirectional miniature loaded wire antennas, loaded helical antennas and multiple-tuned VLF inverted L valley span antennas.

本文密切结合&十五&国防预研项目&软件无线电天线&和&宽带小型化天线&以及国防重点项目&某长波台发信天线电气参数分析与设计&等项目，研究了短波和超短波频段上的宽频带加载线天线、加载螺旋天线和超长波倒L形多路调谐山谷天线的快速精确分析、优化设计以及样机制作。

DG1000 series function / aleatoric and undee generator can offer 5MHz, have rise quickly edge and drop the square wave of the edge, and have the frequency of high accuracy, broadband belt measure a function.

DG1000系列函数/任意波形发生器能够供给5MHz、存在迅速回升沿和回升沿的方波，而且存在高精度、宽频带的频率测量性能。

DG1000 operates direct figure to synthesize science and technology, the random that can output an user to be defined oneself is undee, have rich input output, and frequency meter of high accuracy, broad frequency band, frequency limits 100MHz arrives 200MHz, frequency resolution achieves 6 / second.

DG1000操作间接数字分解科技，可输出用户自界说的任意波形，领有丰硕的输入输出，以及高精度、宽频带频率计，频率规模100MHz到200MHz，频率分辨率达到6位/秒。

When the numbers of high - amplitude pulse were among 1-3 pulses, the relationship between the number of pulse and MPF of click song was approximately linear, otherwise was nonlinear.2、 The bandwidths of the song were nearly 2700 - 6700Hz when the songs were produced by a pair of tymbals.

本文进一步阐明：1、高幅值PT多含有11个脉冲，当含有1，2，3个时，脉冲个数与MPF成准线性关系超过三个为非线性关系。2、双发声膜发声的频带主要在2700Hz-6700Hz之间。

The W-CDMA overlay GSM means use tuneable notch filters at the CDMA transmitters and receivers.The spectrum of notch filters is just the spectrum of GSM.

窄带覆盖的基本原理是N-CDMA信道不与GSM频带在同一小区的同一扇区重叠，而是和N-CDMA扇区相邻小区里的，且与该扇区不相邻的GSM扇区重叠。

The EDT parameter has been studied both in octave band and in 1/3 octave band, and, by using some tools developed for this work in Matlab environment, it has been possible to verify the correlation between the normal modes of the orchestra pit and the highest temporal values traceable to the central band frequencies, the relatives both to the octave band and the 1/3 octave band of the parameter examined.

文中对EDT从倍频程以及1/3倍频程加以研究，并利用在Matlab环境下开发的一些工具来探讨乐池的简正模式与从频带中心频率导出的最大的时间值之间的相关关系。

Using natural frequency ratio and damping ratio as design variables, constructing an objective function with the peak values of dynamic magnification factor and the dynamic magnification area of the main system in the whole frequency band, the optimization problem is built.

建立了以固有频率比和阻尼比为设计变量，以振幅动力放大系数函数的多个峰值和整个宽频带下面积构造目标函数的优化问题。给出了两个自由度减振器参数的优化计算实例。

A novel application of genetic algorithm in designing broad omnidirectional reflectors was introduced.

介绍了遗传算法在设计宽频带全能反射器中的应用。

The production can use as realia and scientific research instrument. DDS ; FPGA ; AVR MCU ; signal modulate

其特点是频带宽、精度高、性能稳定、成本低，可作为电子设计培训课程中的教具，也

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。