NF (noise figure)

用法例句

Automatic gain control technique in microwave noise figure analysis;

微波噪声系数分析中自动增益调整技术

Noise figure measurement within high temperature superconductor mixer;

高温超导混频器噪声系数测量

The development of a special noise factor tester

一种专用噪声系数测试仪的研制

The noise factor analyzer’s operation principle and the basic noise factor measurement method, Y factor method, are described.

论述了噪声系数分析仪的工作原理和噪声系数最基本的测量方法——Y因子法。

After analyzing some factors influencing the receiver performance,for example,noise factor,frequency conversion loss,dynamic range,isolation degree,mixing distortion.

从混频器的基本概念出发,分析了混频器设计中的关键技术,如噪声系数、变频损耗、动态范围、隔离度、混频失真等对接收机性能的影响,并从工程角度出发,指出在工程设计中应注意的要点。

Method to reduce the uncertainty of noise coefficient measurement;

一种减小噪声系数测量不确定度的方法

Based on discussion and analysis of the noise coefficient of multilevel amplifier,an amplifier with low noise was introduced.

本文在对多级放大噪声系数理论分析讨论的基础上,介绍了一种低噪声μV信号放大器的设计与制作。

The way to reduce total noise coefficient is indicated for multiple amplifier.

本文用混合π型噪声模型 ,讨论了共发射极放大器的主要噪声来源 ,最佳源电阻和最小噪声系数 ,指出在多级放大器中降低总噪声系数的方向 ,设计出了一种低噪声偏置电路 。

Numerical Simulation of Dynamic Response and Radiation Noise of Gearbox

齿轮箱动态响应及辐射噪声数值仿真研究

Numerical Simulation and Experiment Study of the Noise Radiated by Two Circular Cylinders in Tandem Arrangements

串列双圆柱绕流噪声数值模拟与实验研究

A Numerical Differentiation Method for Period Function with Noisy Data

一种带噪声的周期函数数值微分方法

On Improving HSI Noise Prediction for Helicopter Rotor in Forward Flight When Flowfield is Partially near Sonic Speed

旋翼前飞气动噪声高效数值算法研究

Numerical Simulation and Experiment Study of the Noise Radiated by a Cavity Flow;

腔体流动噪声的数值模拟与实验研究

Numerical Modeling of Noise Generation During Collapse of Single Bubble

单空泡溃灭及其空化噪声的数值模拟

Numerical analysis of noise radiation from motorcycle engine shell

摩托车发动机壳体噪声辐射数值分析

Signal to Noise Ratio( SNR): The ratio of the signal to the random noise in a set of data.

信噪比：平均到一个数据单元的信号与随机噪声的比值。

Numerical Simulation of the Flow-field and Flow-noise of Fully Appendage Submarine;

全附体潜艇的流场和流噪声的数值研究

Study on Numerical Simulation and Vibro-Acoustics Analysis of Centrifugal Fan;

研究风机振动噪声分析与数值模拟研究

Numerical Simulation of Refrigerating Compressor Acoustic Characteristics and Research of Noise Reduction;

冰箱压缩机声学特性数值模拟及降噪研究

Numerical Calculation for Adaptive Active Noise Control of Engine Exhaust;

发动机排气噪声自适应控制的数值计算

Bochner-Wick Integrals of Generalized Operator Valued Function in White Noise Analysis;

白噪声分析中广义算子值函数的Bochner-Wick积分

Study on Numerical Simulation of the Plastic Air Intake Manifolds on Vibration Noise;

塑料进气歧管振动噪声的数值仿真研究

The Theoretical Research and Numerical Simulation of Aerodynamic Noise for High-Speed Train

高速列车气动噪声的理论研究与数值模拟

The Application of Numeric Analysis Method in the Noise Prodiction of Hydraulic Control System in Airo

数值分析法在飞机液压系统噪声分析中的应用

Research on the Median Filtering Algorithm for Suppressing High-ratio Impulse Noise in Digital Images

数字图像高密度脉冲噪声的中值滤波算法研究

Numerical Study on Blade-Passing Frequency Noise of Aerodynamic Dipole in a Centrifugal Fan

离心风机基频气动偶极子噪声的数值研究