查询词典 modulation

High frequency pulse width modulation power control systems can be realized using semiconductor switches.

高频脉冲宽度调制电力控制系统，可以实现用半导体开关。

The use of the current world's most advanced IGBT and high frequency sine wave pulse width modulation, dual-inverter technology.

采用了目前国际上最先进的IGBT及高频正弦波脉宽调制、双逆变技术。

A symbol synchronization method for digital communication is proposed, and it is a indirectly inserted pilot frequency based on pulse width modulation.

提出了一种用于数字通信的位同步方法，它是基于脉宽调制技术的间接插入导频法。

In the pulse width, frequency modulation, the realization of the flow, pressure control, it can be quickly opened, the use of turn-off.

在脉宽、频率调制下，实现对流量、压力的控制，也可作快速开启，关断使用。

The average current in every phase is obtained by means of Pulse Width Modulation, frorn which becomes the composed vector, and the driving on fractional step angle of stepmotor can be realized.

从而构成合成矢量，实现分数步进角的驱动。实验结果表明，其转角精度高于任何数字编码器的分辨率，极大地提高了步进电机的伺服精度。

With fresh full-cream milk made from whole milk powder, said; to full-fat or part skim milk made from skimmed milk powder, said; raw milk by special technology management to improve milk prepared and nature, so that, when dissolved in water to recover quickly prepared and, without floating or sinking, said agglomeration of instant milk powder; fresh milk through a series of processing and adding lactose, whey powder, amino acids, vegetable oil , vitamins and other nutrients to be adjusted to close to human milk composition made of said composition of breast milk; there is milk sugar, modulation milk powder, whey powder, dairy milk powder, ice cream powder.

以新鲜全脂乳制成的称全脂奶粉；以全脱脂或部分脱脂乳制成的称脱脂奶粉；原料乳经特殊工艺处理以改善奶粉的冲调性，使之在用水冲调复原时溶解很快、无结块上浮或下沉的称速溶奶粉；鲜牛乳经一系列处理并添加乳糖、乳清粉、氨基酸、植物油、维生素等营养物质，使其成分调整至接近人乳成分而制成的称母乳化奶粉；还有加糖奶粉、调制奶粉、乳清粉、酪乳粉、冰淇淋粉等。

The second harmonic is used when using wavelength modulation technology to design gas sensor based on optical spectrum.

在波长调制法的光谱吸收型气体传感器设计中，通常采用二次谐波检测技术。

The author made a simulation model in Matlab/Simulink, and did simulation in several conditions such as no load, integrating with power grid, independently modulation of the active and reactive power and capture of the maximum wind power. The simulation results show that analysis is right and have very important guidance signification on experimental systems.

在此基础上，以Matlab/Simulink为工具，建立了系统仿真模型，进行了发电机空载运行、并网、有功、无功功率独立调节、最大风能捕获运行等工况的仿真研究，仿真结果证明理论分析正确，对系统的实验研究具有一定的理论指导意义。

It makes generating unit connecting with power grid difficult and causes phase modulation condition shifting to power generation operation and turbine in load rejection for stopping unit to produce non-stability operation area.

S特性使机组在难以正常并网并造成由调相工况转发电运行以及水轮机工况的甩负荷停机过程中产生不稳定运行区。

Through the analysis of the work principle of three phases voltage resource PWM converter, set up the low and high mathematic models, deduce the restriction equations about grid voltage, grid current, modulation voltage and the DC output voltage and the calculation equations of the AC-side inductance and the DC-side capacitance. There are two control strategies are adopted: Predicted current control strategy and voltage-current two closed-loop control strategy, and give a comparison by theory and practice.

通过分析三相电压源型PWM变换器的工作原理，分别分析了低频和高频数学模型，并推导出了交流侧电压电流、调制电压、直流侧电压之间的数学约束关系以及交流侧电感和直流支撑电容参数的选取依据公式；分析对比了两种控制策略：预测电流控制和电压电流双闭环控制并加以实验验证；同时采用了负载电流前馈补偿和本文提出的一种基于专家系统的神经元新型智能PI控制器两种方法大大提高了整个系统的动态响应性能，并在仿真和实验中加以验证，这也是本文研究的重点内容之一。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。