Earlier this year researchers at Intel and the University of Washington, in Seattle, showed that they could power a small sensor using a TV signal 4.1 kilometres away.
今年早些时候，英特尔及西雅图华盛顿大学的研究人员演示表明，他们能够从4.1公里以外的电视信号中获取能量来给一个小功率传感器供电。
Differential topological characteristics of the small signal stability region (SSSR) in power systems are tentatively studied in this paper.
对电力系统小扰动稳定域的微分拓扑学性质进行了初步探讨。
Wired remote control is a dedicated cable or power line as a carrier, the signal with modem transmission mode, to achieve a small number of channels can be used to control the method.
有线遥控是通过专用电缆或动力线作为载波体，对信号用调制解调器传输方式，达到只用少量通道即可实现控制的方法。
Modeling is an important task in power system small signal stability analysis.
电力系统小信号稳定性分析中，建模是一项很重要的任务。
Built-in power amplifier circuits that can be a small system, and strong signal by cutting the main priority control.
内置功率放大电路，可以单独成为一个小系统，并受主信号强切优先控制。
The technique of paralleling current sharing of switching power is introduced; the small signal model of the single DC/DC module and the multi-module is analyzed.
文中介绍了电源并联运行的各种均流技术，对单模块DC／DC电源和多模块电源并联运行进行了小信号分析。
In this thesis the small signal model of the power stage of the converter was established and analyzed, the relative transfer functions were presented.
本文对于变换器功率电路部分进行了小信号建模和分析，给出了小信号特性传递函数。
In this paper, a method evaluating small signal gain spectrum of optical fiber amplifier only using a small power broadband light source was proposed.
提出了一种用小功率宽带光源较精确测量光纤放大器小信号增益谱的方法。
In small signal stability study of power systems, eigenvalue sensitivities with respect to parameters quantitatively provide the influencing magnitude and trend.
电力系统小干扰分析中，特征值对参数的灵敏度定量地提供了参数影响的程度和趋势。
For obtaining a pulse series with a small amplitude ripple, an Erbium-doped Fiber Amplifier (EDFA) must be added into the primary experiment setup to enhance injection-modulation signal power.
为了获得振幅均衡的有理数谐波锁模脉冲，必须在原有的实验装置中添加一个掺铒光纤放大器(EDFA)以提高注入调制光信号功率。
Small signal analysis is an efficient tool for the study of power converter.
小信号分析法是研究功率变换器的有效方法。
This paper presents an efficient method for the small signal stability analysis of large power systems.
提出了一种大规模电力系统小干扰稳定性分析的有效方法。
Subsequently, a novel controller for DC bus voltage regulation is put forward according to the small signal model based on the instantaneous power balance in AC and DC sides of three-phase SAPF.
然后根据交流侧和直流侧的功率平衡方程，推导了电压环的小信号模型。最后基于该模型设计了一种高动态性能的直流电压调节器。
Small signal stability becomes one of the important factors influencing transmission capacity because low frequency oscillation in power systems is always caused by small interference.
小的干扰能够引发电力系统发生低频机电振荡，因此小干扰稳定是限制电力传输容量的主要因素之一。
Due to large scale and complexity, conventional small signal stability analysis cannot meet the demand of plan, design and operation of the power grid.
随着系统规模和复杂程度的不断增加，传统的小信号稳定分析已经不能满足电力系统规划、设计和运行的需要。
Currently, Power System Stabilizers (PSS) and FACTS damping controllers are widely used to suppress the low frequency oscillations and to improve small signal stability.
目前，电力系统主要采用电力系统稳定器(PSS)和FACTS阻尼控制器来抑制低频振荡，提高系统小扰动稳定性。
A decoupling and reducing-order method is brought forward to analyze small signal stability of multi-machine power system.
提出了一种多机电力系统小扰动稳定分析的解耦降阶法。
We have derived the formulas of harmonic spontaneous emission power density, small signal gain of this undulator FEL and the coupling coefficients between the electrons and the radiation field.
导出了这种新型摇摆场结构自由电子激光高次谐波的自发辐射功率密度和小信号增益公式。以及电子与辐射场的耦合系数的表达式。
A new type of extended small signal stability region (E-SSSR) is presented so that it can consider the low frequency oscillation phenomena captured in power system operations.
引入一种新的扩展小扰动稳定域的概念，以弥补原有小扰动稳定域无法考虑电力系统(超)低频振荡的不足。
Based on the linearized equal area criterion and small signal analysis, the Principle and techniques of Energy Storage System(ESS) Damping Power System Oscillations are proposed in this paper.
基于线性化等面积法则和小干扰分析方法，提出储能系统抑制电力系统低频振荡的原理和方法。
It has the characteristics like small volume, low power loss, quick frequency shift and elevated signal indication.
它有体积小、功耗低、频率变化速度快、信号指标高的特点。
Calculations of the small signal gain and output power of MGL-84 lasers are made with the model and the calculating results are in agreement with the experiment.
用该模型对MGL- 84型激光器的增益、输出功率和效率进行了计算，其结果与实验结果较吻合。
The design of microwave power amplifier needs large-signal s parameters, but under most circumstances, the designer only has small-signal s parameters and the static I-V curve.
微波功率放大器设计需要大信号s参数，但大多数情况下，设计者只有小信号s参数和静态I - V曲线。
When supplying a small transmitter loop device with power current, the strength of signal as same as that produced by a large transmitter loop can be obtained.
当对小发射回线装置供以大电流时，同样可以得到和大发射回线相当的信号强度。
In general, tachometer generators are eliminated in the small and medium power DC rotating speed governing systems, and armature voltage is used as motor speed signal.
在中小型直流调速系统中，一般都取消了测速发电机，而以电枢电压作为电机转速信号。
The post-contingency small-signal stability region of power grid is analyzed for its economic operation.
准确解析事故后电网的小扰动稳定域，对确保电力系统的经济运行具有重要意义。
We have analysed and discussed the effects of the changes of pressure, flow velocity, gas composition and the discharge specific power on saturation intensity and small-signal gain coefficient.
分析讨论了气压、流速、气比、放电比功率对饱和强度及小信号增益的影响。
These transmitters are very small, rot off how much power they have to have to send the signal to the satellite.
这些发射器很小，从而节省了它们向卫星发送信号时需要的电量。
Experiment one pass, two pass and four pass master oscillator-power amplifier, realizing angularly multiplexed amplifer based on CCEPS which produce a decuple output power in small signal;
实现了基于CCEPS多角度放大单程，双程以及四程放大光路，在小信号时得到十倍以上的放大输出；
Experiment one pass, two pass and four pass master oscillator-power amplifier, realizing angularly multiplexed amplifer based on CCEPS which produce a decuple output power in small signal;
实现了基于CCEPS多角度放大单程，双程以及四程放大光路，在小信号时得到十倍以上的放大输出；
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