negative impedance
英 [ˈneɡətɪv ɪmˈpiːdns]
美 [ˈneɡətɪv ɪmˈpiːdns]
网络 负阻抗
双语例句
- The presented criteria utilize the dynamic negative incremental impedance of the CPL to place design constraints on the filter parameters and thus prevent instabilities.
该判据是在考虑恒功率负载负阻抗大小的基础上，给出了滤波器元件参数的约束条件。 - Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.
当反射界面上下两侧的声波组抗降低时，反射系数就会出现负值。 - Based on S-parameter and negative impedance analyses, a Ku band HFET MMIC VCO, which is turned at source, is designed and fabricated successfully for the first time.
利用S参数分析和负阻分析设计了一个源端调谐的Ku波段HFET单片集成VCO，并获得了一次设计投片成功。 - In this paper, by using a Photo-surface Controlled Negative Impedance Transistor ( PNEGIT) or a Photo-"∧" Bipolar Transistor ( PLBT) which have been fabricated by author recently, a new optical bistable device has been proposed and realized by experiment successfully.
利用作者近期研制的硅光电表面负阻晶体管（PNEGIT）或光电∧双极晶体管（PLBT）两种硅光电负阻器件，提出并成功地实现了一种新型的硅光学双稳态器件。 - Based on the negative impedance of the glow as the load and the particular igniting condition of the second-stage rocket motor of a surface to air missile, the high frequency series-parallel resonant DC/ DC converter is proposed in the paper.
本文基于地空导弹用于导弹续航的二级发动机点火的特殊工作环境和辉光放电的负阻特性，提出了一种串并联谐振DC/DC变换器的电路拓扑。 - In typical six-phase transmission system, half positive sequence, half zero sequence and half negative sequence fault components are independent of the variance of system impedance.
在典型的六相输电系统中，半正序、半零序和半负序故障分量不受系统阻抗变化的影响。 - By using a simple operational transconductance amplifier ( OTA) as a negative impedance used in VCO, the problem of confining VCO's oscillation to a desired range is solved.
同时，用一种简单的跨导运放结构作为VCO中的负阻抗，解决了VCO振荡幅度限幅问题。 - A Study of the Realization and Application of Negative Impedance Converter
负阻抗变换器的实现与应用研究 - The results calculated by computer shows that for different phase distribution function s the negative first harmonie coupled impedance may differ up to a factor of two.
计算表明，在不同的相位分布的假定下，负一次谐波耦合阻抗的计算值可以相差一倍。 - SC negative impedance converters and inductance simulation circuits are designed.
设计并实验了开关电容负阻变换器和电感仿真电路。 - One method to obtain gyrator ─ application of the negative impedance converter
实现回转器的一种方法&负阻抗变换器的应用 - A waveform of chaotic binary sequence is produced by means of the double scroll attractor based on Wien bridge with a negative impedance converter in this paper.
该文利用基于Wien电桥和负阻转换器电路，产生的双卷吸引子混沌信号，获得了相应的混沌二相码序列雷达波形。 - According to the characteristic of power system fault, the suddenly changed negative sequence component is used to solve synthesized impedance of system, namely to define the pre fault system operating condition.
根据电力系统故障的特点，利用负序突变量，求解出系统的综合阻抗，即确定故障前系统的运行方式； - This paper has made a theoretical analysis of active receiving antenna formed by combining negative impedance converting circuit with small cone helical antenna, and pointed out the stable working conditions for such an active antenna.
本文对用负阻抗变换电路同小圆锥螺旋天线相结合，构成的有源接收天线进行了理论分析，并给出了该有源天线稳定工作的条件。 - An active antenna consisting of electrically small antennas and a negative impedance changing circuit is analyzed in this paper.
本文对用一种负阻抗变换电路同电小天线导线相结合构成的有源天线进行了理论分析。 - This paper takes the negative impedance into consideration on the basis of QSS ( Quasi Steady State Model) model of converter, and the results of computation can meet the need of speed and precision for a mixed AC/ DC system when asymmetric faults happened.
在换流器准稳态模型的基础上考虑了直流系统的负序阻抗，能满足电压不对称条件下交直流混合系统计算的速度与精度要求。 - This paper discusses the influence of line distribution capacitance on high frequency protection for directional negative phase-sequence and impedance elements, i. e. phase fault element and earth fault element.
本文将讨论线路分布电容对负序方向高频保护和阻抗元件（相间故障和接地故障元件）的影响。 - Dynatron effect of negative impedance converter has been employed to improve the existing LC damping surge experiment and an idiographic electrical circuit has been given to make the results of experiment diverse.
并运用负阻抗变换器的负阻作用对现有的LC阻尼振荡实验进行了改进并给出了具体的电路，使实验结果更加多样化。 - The QSS ( Quasi Steady State) model of converter which neglects the negative impedance of DC system will bring some errors when three phase unbalanced fault occurs in AC system.
当交流系统发生三相不对称故障时，忽略直流系统负序分量的准稳态模型将给交直流混合系统的仿真带来较大的误差。 - Firstly, a detection method of stator winding inter-turn short circuit fault, which takes the low-filtered stator negative sequence apparent impedance as fault feature, is presented. By using neural network technique, the detection threshold can be appropriately set up.
具体工作如下：提出了以定子负序视在阻抗低通滤波值作为故障特征量，应用神经网络技术适当整定检测阈值的定子绕组匝间短路故障检测方法； - A method for two dimensions analysis and calculation of rotor negative sequence eddy current field is presented by using the complex surface impedance concept. The calculation program is compiled based on the analysis.
利用复数表面阻抗的概念给出了发电机转子负序涡流场二维分析与计算方法，在此基础上，编制了相应的计算程序。 - This phenomenon appears even more striking in the simulation realization of non-linear negative impedance.
这在非线性负阻抗的模拟实现中，更为突出。 - Emulating analysis of circle round device and negative impedance converter
回转器与负阻抗变换器的仿真分析 - Another detection method, which takes the filtered value of stator negative sequence apparent impedance as the fault feature, is also put forward. The former and latter are suitable for the asynchronous motor continuous/ discontinuous monitoring system.
提出了以定子负序视在阻抗滤波值作为故障特征的检测方法，该方法适用于异步电动机巡回监测系统。 - The measuring frequency is used for eliminating unbalanced current of negative sequence, extracting fault components and measuring impedance. The algorithm provides relaying device with accurate information so that the performance of relaying device can be improved.
由算法测得的瞬时频率可以用来消除负序不平衡电流、准确地提取故障分量和测量距离阻抗值，使继电保护装置能获得准确的参数信息，以便进一步提高当前保护装置的动作性能。 - We design a negative impedance converter, through its function of impedance transformation the input impedance characteristics of the transmitting antenna is improved, so the bandwith of active transmitting antenna will be widen greatly.
文中设计了一种新的负阻抗变换器，通过其阻抗变换作用来改善发射天线的输入阻抗特性，从而大大地拓宽了有源发射天线的带宽。 - It also suggests a negative sequence current detection method to discover the fault in the case of one single-phase ground and another phase with high impedance grounding problem ( current leakage).
本文研究了两相接地时主要电气量的变化，提出了将负序电流检测法用于单相接地异相高阻接地（漏电）故障的线路甄别。 - First, the background, the development history and the advantage are introduced. Then the characteristics of the active receiving antenna and the principle of negative impedance conversion is introduced.
首先介绍了有源接收天线的应用背景、发展历史以及其优点，接着分析了有源接收天线相关特性，并介绍了负阻抗变换原理。 - Since HID lamps have negative impedance characteristics, it can not be directly added to the electricity grid. So, it needs ballast as the interface which restrains current between HID lamps and grid.
由于HID灯具有负阻抗特性，不能直接加到电网上，因此，需要在电网和HID灯中加一个镇流器作为接口。 - With negative impedance characteristic, constant power load is the main reason of Electronic Cascaded System instability.
恒功率负载是导致电力电子变换器互联系统不稳定的主要原因。