Compared with the traditional tto , its start - up current is much less , and its larger cylindrical volume allows a higher space charge limit current 对于在电流临近空间电荷限制电流和大信号时，径向电子束与径向间隙内微波电场的非线性相互作用过程进行了初步的研究。
It detects qrs complexes exactly whatever big signal , small signal , peak value change abruptly even anomalous ecg by using the mit / bih database . the heart of rhythm is also exact 通过验证,该算法对大信号、小信号、峰值突变的信号、不完全规则信号的qrs复波也能够准确、有效的识别。
Recently , the large signal network analysis ( lsna ) and testing technology for rf going beyond s parameters has become one of the hot issues in the science of electronic and communication 一种超越s参数的射频网络大信号非线性分析测试技术近年来已经成为信息与电子系统学科的一个最新研究热点。
The nonlinear properties of transistor in large signal condition are simulated by ads ( advanced design system ) using the nonlinear model of transistor and harmonic balance analysis technique 采用agilent公司的ads仿真软件与微波晶体管的非线性模型应用谐波平衡法仿真计算了微波晶体管在大信号条件下的非线性特性。
The main results are presented . second , the theoretical analysis about electron beam and wave interaction is presented . base on the theoretical analysis , numerical simulations of electron beam and wave interaction in gyroklystron were done 二、通过采用自洽非线性大信号理论方法,在理论分析和高频计算的基础上对回旋速调管放大器注-波互作用进行了数值计算。
Integrate - reset - control is a kind of large signal , nonlinear control technique , which has these characteristics as follows : its circuit is very simple , the precision is quite high and the response is very rapid . especially , its performance is not sensitive to the change of parameters 积分复位控制是一种大信号、非线性控制技术，它具有结构简单、控制精度高、响应速度快，特别是其控制性能对系统对电源参数变化不敏感而受到广泛重视。
The ripples of gain and phase - shift in traveling wave tubes can not be explained by the small signal theory and the large signal theory of beam - wave interaction without internal reflection , but the phenomena are in fact present in twt , and affect the performances of the devices , especially the uniformity of gain and phase - shift 摘要无内反射的理想行波管小信号和大信号互作用理论不能解释行波管的增益和相移随频率快速波动的现象，但这种现象在行波管中不同程度地存在，并严重影响行波管的总体性能，特别是影响行波管幅度和相位的一致性。
In this paper , they are set forth at first that the kinds of computer - simulation of electronic devices , the development and the requirements of mosfet ' s model and the way of gain the models " parameters , , the dc models have been bui it in chapter 2 and the models of big signals have been deduced in chapter 3 , they are different from the equivalent circuit models in the traditional software pspice that they come from the numer i ca i - s i mu i at i on wh i ch is based on the essence equat i on , so the precision of simulation is enhanced ? mosfet ' s small signal models of low frequency , intermediate frequency and high frequency have been built in chapter 4 and chapter 5 , although the equivalent circuit models in pspice are used for reference to bui id them , they have their own characteristics which are analyzed at a i i kinds of situations , so that the simulation software for mosfet can be written according them and it i s a i so benef i c i a i for us to catch the gen i us character i st i cs of mosfet and to d esign all kinds of applicable devices the correctness of the models is simply proved in chapter 6 本文首先介绍了电子器件计算机模拟的分类、 mosfet的建模发展动态、对器件模型的要求以及模型参数的提取方法。在第二章中建立了mos晶体管在直流端电压条件下的工作模型；第三章推导了mosfet的大信号模型，这两类模型不同于传统模拟软件例如pspice中的等效电路模型，而是从模型方程出发，采用数值模拟的方法，提高了模拟的精度。第四章和第五章分别建立了mos晶体管低频、中频、高频的小信号模型，虽然借鉴了pspice模拟软件中用等效电路模型的方法，但是本文分别讨论了准静态和非准静态时器件的本征部分以及包含非本征部分工作于低频、中频和高频条件时的模型，可以根据这些模型编写相应的模拟软件，这样在做器件的模拟分析与器件设计的时候，就可以利用模拟软件逐步深入地分析器件在不同的条件下和器件的不同部分在工作时的各种小信号特性，有利于抓住器件工作的本质特性，设计出符合要求的各类通用和特殊器件。
The cold model of helical traveling wave tube ( twt ) and the hot model of beam - wave interaction have been developed , based on three - dimensional twt - cad technology , to analytically , to analytically evaluate influence of small variations in helical slow - wave circuit parameters , within or without the manufacturing tolerances , on cold - hot characteristics of the helical twt 摘要借助于行波管cad技术的发展，建立了螺旋线行波管三维电磁冷模型和注波互作用大信号模型，就螺旋慢波电路参数在公差范围内外做细微变化时，所带来行波管冷热特性的影响进行了全面研究和讨论，得出了一些有用结论。
In this dissertation , researching from the basic concept of large signal network analysis , we discuss the measurement theory and technology of rf network nonlinearity and the characterization technology of intermodulation distortion in detail , and analyse some nonlinear characteristic excited with a one tone or multi - tone , such as am - am , harmonic distortion , intermodulation distortion , adjacent channel power ratio and how to qualitatively analyse nonlinearity of rf network to make the measurement and calibration 本课题从大信号网络分析的基本概念出发,详细讨论了射频网络非线性的测量理论和技术以及互调失真表征技术,分析了在单频音和多频音信号激励下的一些非线性特性,如am - am , am - pm ,谐波失真,互调失真( imd )和临近信道功率比( acpr )等,以及根据包络域方法定性地分析射频微波网络的非线性特性,以此来进行射频网络的非线性测量和校准。
