增益

First, based on coupled wave equations of interaction between pump field. stokes field, acoustic field in SBS processing under stable station, theoretic characteristic parament of SBS are induced, such as gain, threshold, and condition of effective SBS interaction.

首先由受激布里渊散射过程的泵浦场、斯托克斯场和声子场三波相互作用的耦合波方程组，推导出了稳态SBS过程的增益指数、阈值增益，及产生有效SBS相互作用的条件。

Besides, they can not nefleat the neal property out anditory function. Based on the mechanism of real auditory system, a mathematical model is established in which a forward feed back pash is introduced and the static gain curve is derived from input-output curve, therefore the model has dynamic property.

我们根据听觉的生理学机制，建立前馈自适应模型，从输入输出特性曲线上引出静态增益曲线，再在静态增益曲线上引入动态过程，由此建立的数学模型，利用心理学试验数据得到模型参数。

Simulation results show that the Filter and VGA system has gain of 6~48 dB, variable gain of 42 dB,6 dB/Step, THD54 dBc at 100 mV peak-to-peak input voltage, IIP3 of-6.35 dBV. The NF is less than 25 dB and current dissipation is 30 mA from 1.8 V voltage supply.

电路的仿真结果表明滤波器和VGA系统的增益为6~48 dB，可变增益为42 dB，6 dB/step，在输入电压峰峰值为100 mV时THD小于-54 dBc，线性度为-6.35 dBV，噪声系数在通带内小于25 dB，消耗电流为30 mA。

But in the anomalous dispersion regime,the quintic nonlinearity only changes the peak value of the gain spectra and almost does not influence the width of the gain spectra.

在光纤正常色散区，正五阶非线性使增益谱的谱宽和峰值增大；但在反常色散区，五阶非线性仅改变增益谱的峰值，几乎不影响谱宽。

On the basis of comparison of several algorithms of the calculation of unstable resonator"s mode. Fast Fourier transform method is chosen in this paper. The model of multi-layer distribution of gain is established. Sampling granularity in real space used in FFT, quotient of guard band and distance between subsections are made certain respectively. The convergence criterion of root-mean-square of plural y which is the quotient of the optical field"s distributions separated by one pass is established. Under the circs of multi-kind of distribution of gain and different measurement of distortion, the output optical field distribution is calculated.

在比较了各种计算腔模方法的基础上，根据角谱传播理论，选择FFT算法，建立谐振腔内多层增益分布模型，分别确定了FFT算法的空间采样间隔、保护带系数和分段计算的距离，选取光场往返一次之比的均方根值收敛准则，计算多种增益分布、不同镜面变形时的谐振腔输出光场分布，同时计算该光场的远场分布和传输有限距离之后的分布。

In order to improve the arithmetic, a king of self - correcting gain K adaptive PID control way is presented by using recursion formula of gain K in adaptive PSD controller.

并推导了为改进其应用上的不足，将自适应PSD控制器中递推计算增益K的方法应用到单神经元的自适应PID控制，构成具有自动调整增益K值的单神经元自适应PID控制器的学习算法。

For plants with relative degree greater than one, the tracking performance of the MRRC may be unacceptable.

该设计方案的主要缺点是跟踪精度过分依赖控制增益：较高的跟踪精度需要很大的控制增益。

A new switching scheme to the gain of variable structure control signals is proposed. The following important open problems in standard VS-MRAC and MRAC are solved by using the scheme: 1 . a prespecified transient and steady-state performance index for tracking error can be achieved without requiring any information about the plant high frequency gain sign when relative degree of modelled part of plant is one, and 2 . it is shown that as long as the performance indexes are guaranteed for the auxiliary errors, each of which in dynamics is a sub-system with relative degree one, the tracing error will converge to a small residual set in a prespecified transient time when relative degree of modelled part of plant is greater than one.

提出了一种控制增益可切换的变结构自适应律，解决了如下变结构模型参考自适应控制（包括基于调参律的模型参考自适应控制）理论研究中长期没有解决的问题：当对象建模部分相对阶为1、高频增益符号未知且存在非线性输入扰动和未建模动态等情况下，系统跟踪误差可满足预先给定的动态和稳态性能指标；当对象建模部分相对阶大于1且存在非线性输入扰动和未建模动态时，可保证系统跟踪误差在预先给定的过渡过程时间内收敛到一个残差集中； 5。

The relationship between noise figure and modulation efficiency,the loss of the fiber,as well as RIN is simulated.

还建立了链路频响的模型，推导出固有增益与频率关系的表达式，分析仿真了频率对链路固有增益和噪声系数的影响，并与实验结果进行了比较。

So we can get higher spectrally efficiency. We first analyze the performance of adaptive turbo coded modulation based on fixed threshold, and point out its disadvantages.

论文最后在自适应OFDM中引入Turbo编码调制，以期在获得自适应性能增益的同时亦获得Turbo编码增益，从而获得更高的频谱利用率性能。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。