查询词典 modulation

In testing, the TCM can improve the Signal-to-Noise by 3.3dB compared with uncoded 4-VSB modulation, and with the 12 path intrasegment interleaving in TCM coding and Viterbi decoding, system can control short burst noise error efficiently.

本文在介绍ASIC芯片设计的基础上，着重介绍了信道编码中的内码的ASIC实现和性能分析。

to overcome some disadvantages of low precision,slow dynamic response,unconvenience parameter adjust existing in high-power ultrasonic power supply,it applies intelligent control composed of 8089 microcontroller is proposed.the article introduces the modulation principle of spwm,the composition of high-power ultrasonic power system applying the single chip computer to realize the soft of phase lock loop,the mechanism of work and the software thought.it realizes the low loss,high power factor and the whole performance of the circuit is developed.

摘 要：针对目前大功率超声波电源采用模拟控制电路存在精度低、动态响应慢、参数整定不方便等缺点，采用单片机8089组成智能控制的超声波电源系统。提出了基于spwm技术的双闭环控制策略和应用单片机实现软锁相的工作原理和软件思想，使整个超声波电源实现了低损耗、高功率因数，优化了电路的整体性能。

to overcome some disadvantages of low precision,slow dynamic response,unconvenience parameter adjust existing in high-power ultrasonic power supply,it applies intelligent control composed of 8089 microcontroller is proposed.the article introduces the modulation principle of spwm,the composition of high-power ultrasonic power system applying the single chip computer to realize the soft of phase lock loop,the mechanism of work and the software thought.it realizes the low loss,high power factor and the whole performance of the circuit is developed.

寂寞网民何时&回家吃饭&？基于单片机8089的超声波电源控制技术的研究。裴玖玲屈百达□摘要：针对目前大功率超声波电源采用模拟控制电路存在精度低、动态响应慢、参数整定不方便等缺点，采用单片机8089组成智能控制的超声波电源系统。提出了基于spwm技术的双闭环控制策略和应用单片机实现软锁相的工作原理和软件思想，使整个超声波电源实现了低损耗、高功率因数，优化了电路的整体性能。

Unresonant pulses ; detunings ; phase modulation.

非共振脉冲；失谐；相位调制

AIM: To examine whether γaminobutyric acid modulation is involved in morphineinduced antinociception in the ventrolateral orbital cortex of the rat.

摘要目的：明确腹外侧眶皮层内微量注射吗啡产生抗伤害效应的机制是否通过GABA能调制介导的。

In addition, the analytic expression of peak value of PER associated with the length of grating, the modulation depth of refractive index and the Verdet constant is also given, with convenient application to the performance analysis of magnetic field measurement.

文章还给出了峰值消光比与光栅长度、折射率调制深度和费尔德常数之间关系的解析式，可方便地用于分析磁场的测量性能。

This paper studies the modulation technique and demodulation technique of the self-mixing interference semiconductor laser vibrometer.

本文研究了半导体激光自混合干涉测振仪的调制与解调技术。

The article mainly introduces the laser self-mixing interference vibrometor system in principle, the optical system design of the vibrometer system, signal modulation module design, demodulation module design and DSP gathering and processing module design.

介绍了激光自混合干涉测振仪的原理、仪器系统的光路系统设计、信号的调制模块设计、解调模块设计以及DSP系统的采集处理模块设计。

On the basis of diagnosis on athletes' overall psychological,the author designs and applies the systematic psychologicai training method which includes cognitive training,method training,indi- vidual training,development of self—confidence and competitive spirit,and training of adaptabilty and modulation.

在对田径运动员进行全面心理素质诊断的基础上，设计并采用了系统心理训练方法，即&认识训练&、&方法训练&、&个体训练&、&自信心和竞争精神的培养&、&适应与调节训练&。

The document is a communication principle of digital modulation and demodulation of the Matlab code. such as BPSK, QPSK, QAM modul...

该文档给出了通信原理中的数字调制和解调的matlab程序代码，如BPSK，QPSK，QAM等等调制方式。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。