Accelerating noise was measured and analyzed for a passenger car, the inlet air noise of its engine has been found to be the main noise source during the car accelerating period.
运用该技术对某汽车的加速噪声进行测量和分析,发现发动机进气噪声是该车主要的加速噪声源。
The idle noise testing,noise source identification,reducing noise and sound quality optimization were performed on a four cylinder diesel engine.
针对高压共轨4缸柴油机进行了怠速噪声测试、噪声源识别、降噪以及声品质优化研究工作。
Respond of petroleum log data to modulation noise;
石油测井数据对调制噪声的响应
Application of modulation noise to data acquisition of petroleum logging;
调制噪声在石油测井数据采集中的应用
The anti-noise amplitude modulation(AM) spot jamming performance of pseudo-random code phase modulation fuze,pseudo-random code phase modulation and pulse amplitude modulation(PAM) combined fuze,and pseudo-random code phase modulation and pseudo-random pulse position modulation(PPM) combined fuze is researched based on the criterion of signal to jamming ratio(SJR) gain.
该文以信干比增益作为衡量标准来研究伪码调相引信、伪码调相与脉冲幅度调制(PAM)复合引信、伪码调相与伪随机脉冲位置调制(PPM)复合引信的抗瞄准式噪声调幅干扰性能。
The computing method of power spectrum of gauss white noise was studied and the computing equation of noise FM jamming band was obtained.
给出了统一的调频干扰时域数学模型和频域数学模型,推导了均匀分布的高斯白噪声调频信号干扰的功率谱函数计算方法,得出了噪声调频信号的干扰带宽计算公式。
Wide band barrage jamming noise is transformed form Baseband noise,which is added to VCO,by the method of noise FM.
基带噪声加到VCO上,采用噪声调频的方式得到较宽频带的阻塞干扰噪声,噪声频谱的中心位置由加到VCO上的直流偏压大小来控制。
In this paper,the performance of the noise FM jamming signals is analyzed.
分析了噪声调频干扰信号的性能,建立了干扰系统和噪声调频干扰信号的仿真模型,仿真出不同干扰频率和不同干扰带宽下噪声调频干扰信号对直扩系统影响的误码率曲线,结果证明了设计的噪声调频干扰模型能够有效的干扰扩频通信系统。
Study on Pass-by Acceleration Noise Analysis and Control of New Car
新型轿车车外加速噪声的分析与控制研究
The Level with Pass-by Accelerating Noise of Great Model Passenger Accommodation Vehicle in Our Country and the Study of Decline Noise Measure
我国大型载客汽车的加速车外噪声水平及其降噪措施研究
Decomposing Theory and Experimental Study of Noise Source for Accelerating Vehicle
加速行驶汽车噪声源分解理论与试验研究
Noise analysis and parameter optimization of digital MEMS accelerometer system
数字式MEMS加速度计噪声分析和参数优化
Study on the aerodynamic noise of a fastback car with rear view mirrors in uniform motion and accelerated motion
匀速及加速行驶时带后视镜轿车气动噪声的研究
The Origin of Noises from Vehicle Transmissions and the Measures how to Lower Them
汽车变速器总成的噪声源及降噪措施
The Effects of +Gz and Noise Combined Stress on Learning and Memory in Rats;
正加速度和噪声复合应激对大鼠学习记忆的影响
These normally exceed sonic velocity with the consequence that the loom are noisy and consume considerable amount of energy.
通常使用的气流速度超过声速,其结果是织机噪声的提高和能耗的增加。
The principle of the car acceleration noise is discussed and the acoustic field model for underneath car cavity is derived.
论述了轿车加速行驶噪声的原理,推导了轿车与地面间声场的声学模型。
Prediction on the Vibration and Noise of High-Speed Train Structure and Research on the Noise Reduction Technology
高速列车结构振动噪声预测与降噪技术研究
Study on Analysis and Control of Noise for High-Speed Flexible Mechanisms;
高速柔性机构的噪声分析与控制研究
Research on Interior Noise Control of High-speed Maglev Train;
高速磁浮车的车内噪声控制计算研究
Fast Algorithm and Implementation of Multi-channel Active Noise Control;
多通道有源噪声控制快速算法及实现
The Investigation on the Rotor/Stator Interaction Noise with Subsonic Speeds
亚音速叶轮机械动静干扰噪声的研究
Research of Emission Noise Property of High-speed Railway Cars
高速铁道车辆辐射噪声特性初步研究
Design of novel programmable divider with high speed and low noise
新型高速低噪声可编程分频器的设计
Application of CAT technology on gearbox noise measurement
CAT技术在变速箱噪声测试中的应用
Rapid DOA estimation for nonuniform linear array in the presence of colored noise fields
色噪声下非均匀线阵的快速方位估计