查询词典 synchronization

In order to take the advantages of multi-antenna scheme of the system as well as multi-path energy under the circumstance of multi-path fading channel, and to acquire downlink frame synchronization and symbol synchronization by exploiting digital disposal method, we put forward the timing synchronization arithmetic of two demension energy window which is based on the interpolated signals over two times over-sampled incomings.

为了在时变多径衰落信道环境中充分利用多天线和多径能量检测的优势，并为了使系统可以采用数字处理方法实现下行链路的帧同步和符号定时，我们提出了基于两倍过采样进行插值的二维能量窗定时同步算法。

Utilizing Chua's circuit, a drive-response chaotic synchronization system is constructed, by means of imitation, it can be concluded that this synchronization system possesses to a certainly stability、resisting-disturbance, and so on;Based on its system and by means of imitation, the characteristic of the chaotic synchronization self-maintenance is put forward, and imitation results are also presented.

介绍了Chua电路及其特性，给出了实现非线性电阻的一种电路；利用Chua电路构造出一种驱动-响应混沌同步系统，通过仿真得出此同步系统具有一定的鲁棒性、抗干扰等特性；根据此同步系统，仿真发现混沌同步具有自保持特性，并给出了仿真结果，这一在混沌领域的首次发现为混沌在保密通信的实际应用提供了依据。

The results show that injection locking synchronization is realized when injection rate is large enough. In the injection locking regime, similarity index is larger for external modulation than that for direct modulation. If injection rate keeps unchanged, synchronization is little affected by modulation index, but it is affected by modulation frequency. Since outputs of the master laser are antiphase for direct modulation and external modulation, the fluctuations of similarity index with modulation frequency for the two lasers are contrary.

研究结果表明：当注入强度足够大时，系统实现注入锁定同步，外部调制的相似指数大于内部调制；注入强度恒定时，同步品质几乎不受调制指数的影响，而受调制频率的影响；由于内部、外部调制引起主激光器的输出反相，两种调制方式下同步品质随调制频率的变化趋势也相反。

Based on global coupling, a method which can induce both synchronization and anti-synchronization by constructing coupled chaotic system with identical antisymmetric chaotic systems was presented.

提出在具有反对称性的等同混沌子系统中，利用全局耦合实现同步与反同步共存的一般方法，论证了其在离散系统和连续系统上的适用条件。

A special antisymmetric structure is proposed, and based on it, the direct design method is given to design the anti-synchronization controller. To prevent the controller design by active control method from indiscrimination, a simplified judging method of negative definite matrix is introduced to give the anti-synchronization active design of controller.

提出了一种特殊反对称结构，基于此给出了反同步控制器的直接构造法；针对主动控制法设计控制器的盲目性，引入了判定矩阵负定的简化方法，给出了实现反同步的主动控制法。

Chaotic system ; synchronization ; anti-synchronization ; Chua's system ; antisymmetric cubic map

混沌系统；混沌同步；混沌反同步； Chua's系统；反对称立方映象

Then the performance of the system was compared with the other systems, and a kind of time synchronization and carrier wave synchronization method was introduced.

分析了其调制原理，和体制性能，与其他体制作了简单比较，并针对解调结合现有算法，提出了载波同步和定时同步的实现。

In 1990 and the pioneer works of Pecora and Carrol, The theoretical research and applied study of the chaotic control and chaotic synchronization get the development at full speed. Various kinds of methods of the chaotic control come out one after another and people find the chaotic control and chaotic synchronization can be applied to a lot of fields such as secure communications, chemical, modeling brain activity etc.

但自1990年E.Ott等人提出了OGY方法以及Pecora和Carroll关于混沌同步的开创性工作之后，混沌控制与同步的理论研究和应用研究得到飞速发展，各种控制混沌的方法相继问世，并发现了混沌控制与同步可以在诸如保密通讯、信号处理、化学反应、生态和电力系统等领域广泛应用。

In the scheme, we use a path time delay estimation method to improve the accuracy of the correla- tion based symbol synchronization methods, and use a tracking loop to lock the symbol synchronization and to track the sampling clock.

在该算法中，我们使用一种路径时延估计的方法来提高基于相关算法码元同步的准确性，并采用一个跟踪环路来锁定码元同步和跟踪采样时钟。

These problems include software synchronization,hardware synchronization,memory protection,and memory coherency.

这些问题包括软件同步、硬件同步、存储器保护和存储器相关等。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。