查询词典 synchronization pulse

Based on the analyzing synchronization modulate and synchronism modulate, for the defects of synchronism modulate, uses prefabricating SPWM waves table, soft open loop synchronization model, exactitude modify and coarse modify, implements phase locking and synchronization accuracy.

在对SPWM逆变电源的两种常规调制方式与同步模式分析的基础上，采用异步调制方式，同时对该调制方式的缺点采用了SPWM波形表格预制法与软开环同步模式、粗调与精调相结合的方法，实现了高精度的锁相与同步技术。

The integrated method to obtain the time-space consistence is discussed, which includes clock synchronization, time stamp and compensation algorithm. The layered hybrid synchronization mechanism based on GPS receiver is given, the ISAbus interface hardware and supporting software of GPS timer and software timer are developed. Finally, the synchronization precision is also quantitatively analyzed and testing.

基于时钟、时间和时空一致性问题的分析，提出了采用时钟同步、时戳机制和补偿算法实现时空一致性的综合方法，设计并实现了基于GPS接收机的分层式混合同步方案，开发了GPS时钟和软时钟ISA总线硬件接口和相应的支持软件，对同步精度进行了定量分析和试验测试。

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 foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源，通过Simulink仿真和试验检验其满足设计要求，实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出；利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集，通过异步串行通信实现单片机与计算机之间的数据通信，将检测数据传至上位机；在上位机利用Matlab开发人机交互界面，实现相关数据处理和图形显示，包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

When the chirped pulse with area smaller than propagates in the medium, splitting doesn't occur and the chirped pulse evolves gradually to an approximate normal Gaussian pulse (C=0), and this characteristic doesn't vary when the chirp coefficient; however, variation of the chirp coefficient will change amplitude and group velocity of the pulse.

面积小于的啁啾脉冲，在介质中传播时不发生分裂，且啁啾脉冲逐渐演化为一个近似的无啁啾(C=0)脉冲，这一特点不随啁啾系数的改变而改变；但啁啾系数的变化将改变脉冲的振幅和群速度。

The pulse propagation through fog medium is discussed .The pulse distortion induced by fog is found using method of closed solution for Fourier integral in time domain. It is found that the pulse distortion is affected by the visibility, frequency, pulse width and path length.

在此基础上应用傅立叶时域积分近似解方法对脉冲波通过雾媒质时的传输特性进行了研究和分析，给出了脉冲畸变、频移随频率、能见度及传播距离的变化关系。

The comparison of the two kinds of pulse width shows that the FWHM pulse width is different from the RMS pulse width for the subcycle hyperbolic secant pulses,and the absolute phase affects the pulse width seriously.

研究结果表明，对于亚周期（半高全宽脉冲宽度小于一个光学振荡周期）双曲正割脉冲，均方根脉冲宽度与半高全宽脉冲宽度有较大的差异，并且绝对相位对均方根脉冲宽度的影响很大。

It introduces the process of getting ultra-short pulse using a gain switched quantum well DFB laster as signal pulse source,the method of obtaining OTDM signal and extracting short pulse through the technique of extracting light-pulse which apply to high-speed OTDM system.

介绍了采用掺铒光纤放大器获得超短脉冲；利用方程差微调法获得光时分复用信号和易于实现动态色散补偿的啁啾光纤光栅实现色散补偿，以及通过适于高速光时分复用系统的光时钟提取技术提取时钟脉冲等内容。

In this thesis, we propose two pulse generators whose pulse amplitude is adjustable. These pulse generators use the second-order transient circuit at over-damping mode to generate the adjustable monocycle pulse with good symmetry and low ringing in the simulation and measurement.

本论文提出两个脉波高度可调的脉波产生器，主要观念在於利用RLC二阶暂态来产生脉波，并利用过阻尼响应来降低脉波尾端的涟波，从模拟与量测中可验证此特性。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。