查询词典 crest

Also it can minimize leakage errors involved in fast fourier transform based measurement and can be pre-emphasized by keeping low crest factor.

与伪随机信号的周期反卷积不同，扫频信号通常都是由非周期反卷积求脉冲响应，这使脉冲响应的长度可以大于信号的长度。

The main contents of the dissertation are as following:(1) The way to constitute a multicarrier signal by using any one complementary code from multiphase complementary code pair is proposed, and the upper bound on crest factor for a multicarrier signal is studied.

多载波及其多载波CDMA系统是未来移动通信系统一种很有应用前景的侯选方案，本文针对这两种系统中的峰平功率比减小等关键技术进行了研究，主要内容。。。

Using this method, wide dimming range can be achieved with narrow frequency range and constant DC link voltage. And the lamp current keeps perfect sine wave all the time, which means low lamp current crest factor is obtained. Its validity is verified by simulation and experiment.

本章最后提出了一种基于T型滤波器的新型的调光方法，采用此方法可以在保持逆变器直流母线电压和开关占空比不变的情况下，只需很窄的频率范围就能达到非常宽的调光范围，而且在整个调光范围内灯电流都基本上是完美的正弦波，这就意味着可以始终保持很低的灯电流波峰因数，仿真和实验结果充分验证了它的优点。

We also present the crest factor of S-R,Hadamard and m sequences spreading MC-CDMA, which are 6dB,13.68dB and 12dB separately.

对长度为32的S-R序列扩频、Hadamard扩频及长度为31的m序列扩频的MC-CDMA信号进行了比较，其峰平比分别为6dB，13.68dB和12dB。

R. Lamp Current Crest Factor: For 60Hz operation, the ratio of peak lamp current to the root mean square RMS

R。 为灯电流的最大峰值与均方根有效值之比。为避免操作阴极，标准规定LCCF 不得超过1.7 。

The solar-powered lighting system developed in this study possesses a few advantages, including energy conservation, high efficiency, a low lamp-current crest factor and a low starting lamp-voltage, which all conform to the general intention of green lighting.

本文所设计的太阳能萤光灯照明系统，具有节能、高效率、低灯管电流峰值因数及低启动电压的优点，能符合绿色照明之实用潮流。

The experimental results indicate that the crest factor of the lamp current is 1.41 when the output power of the fluorescent lamp is 36 W. The power factor is 0.99 and the efficiency of the ballast is 91% when the system is in utility grid-connected.

由实验结果显示，当萤光灯输出36W时，灯管电流峰值因数约1.41；执行市电并联时，市电侧之功率因数约0.99，整体电路之效率约91%。

Multicarrier and multicarrier CDMA systems are the candidates with a greatapplied foreground for future mobile communications system.Some keytechniques in the two kinds of systems,including the reduction of peak-averagepower ratio and so on,are studied in this dissertation.The main contents ofthe dissertation are as following:(1) The way to constitute a multicarrier signal by using any onecomplementary code from multiphase complementary code pair is proposed,andthe upper bound on crest factor for a multicarrier signal is studied.

多载波及其多载波CDMA系统是未来移动通信系统一种很有应用前景的侯选方案，本文针对这两种系统中的峰平功率比减小等关键技术进行了研究，主要内容包括：(1)提出了利用多相互补码对中任一互补码构成多载波信号的方法，研究了多载波信号峰值因子的上边界。

The power factor, energy efficiency, electronic loss, lumen/w. and crest factor of 2×36 W electroinc ballasts based on these two dimming methods are recoded and Compared over a wide dimming range.

在宽的调光范围内，记录并对比了基于这两种调光方法的2×36W电子镇流器的功率因数、能量效率、电子损耗、单位功率光通量以及峰值系数。

In this method, wavelet is used to extract fault characteristics and neural network is used to diagnose the faults; the inputs and outputs of the neural network are all memberships concretely, the inputs are the memberships of the crest factor, pulse factor, margin factor, bias factor, kurtosis factor and maximum spectrum on each characteristic domain, and the outputs are memberships of each fault.

即利用小波变换获取特征域，取特征域上的峰值因子、脉冲因子、裕度因子、偏态因子、峭度因子及频谱最大值作为神经网络的输入，并对神经网络的输入、输出进行模糊化处理，以神经网络进行诊断。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。