查询词典 DDS

With the modern electronic measurement technology that can produce all kinds of signals in the digital waveform signal generator application of more and more, this paper, a DDS as the basic unit of the digital shift, I believe the generator design .

摘 要：随着现代电子测量技术的发展，能够产生各种波形信号的数字式信号发生器的应用越来越广泛，本文介绍了一种以DDS为基本单元的数字移相信号发生器的设计方法。

Your account will be credited with the full amount of the Palm DDS.

我们会将帕姆DDS电脑的全额费用退回您的信用卡帐户。

It has analyzed the principle and the basic structure of DDS, it also has carried on the theoretical analysis to the ideal DDS frequency spectrum characteristic.

分析了DDS的工作原理及其基本结构，在此基础上对理想的DDS频谱特性进行了理论分析。

The spurious lines caused by those sources can be classified into different sets according to the greatest common divisor of the DDS frequency control word and 2N,where N is the word length of the DDS phase accumulator.

由此产生的杂散谱可根据DDS的频率控制字和2N的最大公约数进行分类， N是DDS相位累加器的字长。

Basic principles of the DDS is introduced in the paper, frequency form and stray inhabitation of the DDS is analyzed.

文中介绍了DDS的基本原理，对DDS的质谱及其散杂抑制进行了分析。

According to UPGMA cluster analysis, JCS diverged from DDC and DDS and formed another branch. This result confirmed that the similarity of genetic structure of DDC and DDS were more higher.

用 UPGMA 方法聚类， DDC 、 DDS 两组明显聚在一起，与 JCS 的遗传距离分别是0.2182、0.2744，进一步验证了三个组别遗传结构间的关系。

It is true that the moreparticipation of DDS into micelle, the more thermostability of DDS in aqueous solution reaches.

进入胶束相的DDS和DR的量越多，它们水溶液的热稳定性提高越显著。

This paper introduced the design and development of a virtual frequency sweeper based on DDS technology.

介绍了基于DDS技术的虚拟扫频仪的硬件与软件设计，并详述了DDS技术以及用该技术实现扫频信号源的方法。

According to the principle and characteristic of the formation of standing wave, the authors have developed a standing wave demonstration tube, which consists of loudspeaker, sonic focusing vessel, organic glass and a little liquid driven by the high power DDS signal. The frequency and phase of the highly stabilized signal, which is produced by MCU, DDS, LPF, can be numerically adjusted.

根据驻波形成的原理及其特点，利用MCU，DDS，LPF等产生频率和相位可数控调节、频率稳定性较好的大功率DDS信号源，使用该功率信号驱动由扬声器、声波汇聚器、有机玻璃管和少量液体组成的驻波演示管。

But there was no current modulate circuit for TDLAS system.The design of modulation circuit for tunable diode laser based on DDS has been introduced.The main idea of design is using MCU to control DDS and D/A chips,so we can get sine wave and saw tooth signals.

DDS器件采用高速数字电路和高速D/A转换技术，具备了频率转换时间短、频率分辨率高、频率稳定度高、输出信号频率和相位可快速程控切换等优点，可以实现对信号的全数字式调制。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。