查询词典 modulation

The realization monolithic integrated circuit system double audio frequency, this radio has used double audio frequency decoding chip MT8870, demodulates the tonic train signalling from the frequency-modulated signal, and separates the double tonic train signalling from the tonic train signalling to enter the double audio frequency decoding electric circuit implementation letter command to decode, thus carries on the low gear rate using the frequency modulation channel the control command transmission.

为实现单片机控制的双音频解码，本收音机采用了双音频译码芯片MT8870，从调频信号中解调出音频信号，并从音频信号中分离出双音频信号进入双音频解码电路实行信令解码，从而利用调频信道进行低速率的控制指令的传输。

A voltage flicker demodulation method is provided, which relates to a method for demodulating voltage flicker modulation wave.

一种电压闪变检波方法，它涉及一种电压闪变调制波的检波方法。

Oversampling based Sigma-Delta modulation technique once had been widely used in low-speed high-resolution field, but they has excessed this limitation for high-speed device development and the strong requirements of modern wire/wireless communication.

但这种局面已经改变，一方面由于现代CMOS工艺的进步使系统工作时钟频率不断提高，另一方面受到现代通信系统巨大需求的刺激，现在Sigma-Delta模数转换器早已突破了1MHz的带宽限制，并持续往高速应用领域发展。

The dissertation regards the practices of Mao Ze-dong dealing with Sino-U. S. relations as research topic, exhumes internal mind experiences by external objective actions, studies Mao"s world insight, developing thought and spirit of dealing with concrete matters relating to work, clarifies the changes of Mao"s America view, uncovers subjective and objective reasons resulting from the changes and the influence on the foreign policy transformation and modulation, furthermore, the article will provides historical reference for the contemporary similar problem.

本文以毛泽东一生处理中美关系的实践为研究对象，从外在的客观活动来发掘内在心路历程，把握他面对美国的世界眼光、发展思维和务实精神，理清他对美国认识发展变化的思想脉络，揭示导致这种起伏变化的主客观原因，及其带来的外交策略转变与调整，从而把握中美关系的大致走向，为今天正确处理中美关系提供一些历史的借鉴。

Data accumulated up to now have indicated the important role of MR in fertilizing modulation of human.

有关资料表明，MR在人类受精调节中可能起重要作用，但迄今对MR的表达、定位和功能等基本问题尚无较一致的看法，极待进一步深入探讨。

Uses the automated control not only on the galvanization production line to be possible to raise the product manufacturing efficiency and to reduce worker's labor intensity, and has the very good economic efficiency and the social efficiency, galvanizes on the production line to be possible to realize the automated control using PLC, PLC has the reliability to be high, the compatibility is broad, has the correspondence function, the structure modulation characteristic, therefore how to use good PLC to become the galvanization production line automation control key, auxiliary to galvanized the automatic production line driving with PLC by the frequency changer to carry on the automatic control, had the structure to be simple, the programming was convenient, the operation was flexible, the use safe, worked stable, the perform reliably and the antijamming ability strong characteristic, was one kind of very effective automatic controlThe way, is galvanizes the production to realize, the low cost, the high grade automated production development direction highly effective.

在电镀生产线上采用自动化控制不但可以提高产品生产效率和减轻工人的劳动强度，而且有着非常好的经济效益和社会效益，电镀生产线上运用PLC则可以实现自动化控制，PLC具有可靠性高，适应性广，具有通信功能，结构模块化的特点，因此如何使用好PLC成了电镀生产线自动化控制的关键，用PLC辅以变频器对电镀自动生产线行车进行自动控制，具有结构简单、编程方便、操作灵活、使用安全、工作稳定、性能可靠和抗干扰能力强的特点，是一种很有效的自动控制方式，是电镀生产实现高效、低成本、高质量自动化生产的发展方向。

It proved that the model can be used to analyze the propagation characteristics, optimize the modulation and coding schemes and performance simulation of the HAPS communication systems.

证明该模型可用于高空平台站通信电波传播特性的分析、调制及编码方案的优化和通信系统性能仿真等方面的研究。

In this investigation, TP could inhibit the ATPase's activity of P-gp in dose-dependent manner, indicating that TP exerted their modulation effect on MDR through inhibiting the ATPase activity of P-gp, and consequently interdicting the pumping function of P-gp on anti-cancer drug.

研究发现TP剂量依赖性的抑制ATPase活性，说明TP可以通过抑制P-gp糖蛋白的ATP酶活性的方式阻断P-gp糖蛋白对抗癌药物的溢出作用从而发挥其逆转MDR的作用。

And then, the paper also introduces the simulation tool software MATLAB which is used in the project, and introduces each module of OFDM including the channel coding, interleaves, modulation, the fast Fournier transformation and the wireless channel in this simulation. Finally, the paper analyzes the flowing diagram of OFDM and carries on the simulations on the simplification module which does not affect the research of the transmission, and then discusses the results obtained from the simulation experiments.

首先介绍了OFDM的历史背景发展现状及趋势研究意义和研究目的及研究方法和OFDM的基本原理基本模型OFDM的基本传输技术及其应用，然后介绍了本课题所用的仿真工具软件MATLAB，并对其将仿真的OFDM各个模块包括信道编码交织调制方式快速傅立叶变换及无线信道进行介绍，最后是对于OFDM的流程框图进行分析和在不影响研究其传输性的前提下进行简化，并且对其仿真出来的数据图形进行分析理解

Based on the theory of frequency modulation,the principle that frequency jittering spreads the spectrum energy of the voltage and current is analyzed.

针对传统的固定频率PWM控制方式引起的波形频谱能量集中、谐波幅值较大的缺点，文章基于频率调制的理论分析了开关频率抖动技术扩散电压频谱以及电流频谱能量的基本原理，结合传统的PWM控制器，采用三角波作为调制信号实现简单的频率抖动的方法。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。