The result provides valuable reference for projects including noise control diagnosis acoustical environment design etc. 计算结果可为噪声控制、故障诊断、声环境设计等工程实际应用提供有价值的参考。
The reference's noise error is a different matter. 基准电压的噪声误差是不同的问题。
By coincidence, it happens to be the same building where, in 1901, the British manufacturer J. Jaques& Son trademarked an after-dinner parlour game for the upper classes as ping pong, in reference to the noise of the ball bouncing off the wooden bats. 碰巧的是,在1901年,也正是这幢建筑物里,英国制造商J.JaquesSon将上流社会饭后玩的一种室内游戏申请注册为乒乓球商标因乒乓球撞击木质球拍时所发出的声音而得名。
To discuss the relationship between man and nature with reference to the cases relevant to noise. 以有关的具体社会案例为材料,充分讨论人与自然的关系;
Of which, it is known as the selective sound intensity technology that correlation analysis of intensity of noise sources is done by taking the noise signals on testing location as the reference signal to determine noise source and response frequency. 其中,将测试部位噪声信号作为参考信号,与噪声源的声强进行相关分析以确定声源的位置和响应频谱的方法称为选择性声强技术。
In this paper, the noise cancellation is completed by using Adaptive Neuro-Fuzzy Inference System, which fits the case where there is a reference noise. The method means extracting signal from mixture of background noise and signal. 利用自适应神经网络模糊推断系统可以抑制噪声,即从信号和噪声混合中提取信号,这种方法适用于有参考噪声的情况。
Using these formulas, the analysis and estimation of the local accuracy for a cross correlator can be made out based on the autocorrelation functions of the reference map signal and noise random fields and the selected integration distance. 利用这些公式,根据基准地图信号和噪声随机场的自相关函数和所采用的积分距离,可以对互相关器作出局部精度的分析和估计。
The result identifies the main noise source, and makes reference to reduce the noise that emitted from the tested engine. 利用这些结果着重分析和识别了该发动机的主要噪声源,确定了其噪声源的位置、主要噪声频率成分和声功率的贡献,为降低发动机噪声提供了改进依据。
By measuring and transforming vehicle flow and vehicle reference radiation noise energy in Haikou, a macroscopic calculation method for the total traffic sound energy was discussed. 通过车流量实测和等效车流量转换、车辆基准辐射噪声声压级实测和声功率级转换的方法计算城市路网交通噪声总声能量。
As an application in voice signal processing, this paper presents an multiple reference adaptive algorithm of elimination speech noises ( VMLMS), and it also presents the implement scheme of multiple reference adaptive speech noise canceller. Moreover, we gieve out the simulation results. 以语音信号为例,给出了多参考输入自适应语音消噪算法及多参考输入自适应语音噪声抵消器的实现方案,并进行了计算机仿真,给出了仿真结果。
A Cross Reference Method of System Modeling and Noise Reduction for Nonlinear Time Series Analysis 非线性时间序列分析中系统建模和噪声抑制的交叉参考方法
The Study on Characteristics of SFSF-type Tapping Reference Noise Source SFSF型撞击式标准声源声学性能的研究
The method can be applied to the hydrodynamic noise testing facilities where there is stronger background noise and getting rather pure background noise as reference noise. 正好适用于水动力噪声试验设备,其中背景噪声强,而且可以得到比较纯净的背景噪声作为参考噪声。
In this paper, the authors point out that it is not suitable in reference to estimate the fictitious noise by using Sage and Husa's constant noise estimators. 在本文中,作者指出了文献[3]中,用Sage和Husa的常值噪声统计估值器来估计虚拟噪声是不合理的。
And it proves that wavelet transformation could be used for noise reducing, especially for the high frequency disturbance mixed in strain signal. It is of reference value for noise filtering as well as for fatigue data processing in engineering projects. 本文的分析结果表明小波能够用于振动信号的滤波降噪特别是对于应变信号中的高频干扰剔除,这对工程中的滤波降噪和疲劳统计有一定的参考价值。
It provide a analysis basis and reference for reducing car noise and vibration. 为降低车内噪声和振动响应提供了分析依据和参考。
The elementary principle of microwave radiometer with two reference noise temperature is described briefly. The calibration equation and the formula of noise temperatures resolution are proved. 本文简述双参考温度微波辐射计的工作原理,导出校准方程、列出温度分辨率的理论表达式。
In this paper the measures of diagnosis analysis for noise sources have been discussed. For the main noise sources of automobile& noise of the engines made a distinguish analysis technology and various noise control measures. It is beneficial reference to reduce noise of engine. 本文通过对噪声源一般诊断方法的探讨,以发动机噪声源的分析为应用对象,论述了汽车主要噪声源&发动机噪声的鉴别分析技术和各种控制措施,为发动机噪声的降噪工作提供参考。
Thus, the research results can serve as a very significant reference for the urban traffic noise control. 其结果对于城市立交桥交通噪声的管理与治理提供相应的参考。
The preprocessed reference map and additional noise are supposed as independent random field with zero mean. 接着假定预处理后的基准图和附加噪声是零均值随机场;
Let the output of signal sensor be the original input and those of noise sensors as reference inputs, then noise caused by the change of orientation of magnetic field sensor relative to geomagnetism orientation can be eliminated efficiently, as well as bow wave due to carrier movement. 以信号传感器输出作为原始输入,噪声传感器输出作为参考输入,采用自适应噪声抵消技术,能有效消除因载体运动产生的涡流磁场及因磁探头方向相对地磁方向改变而引起的噪声输出。
The Elman neural network is used to identify and forecast the noise signal at the driver's ear position, and offered the reference signal that the active noise control system need. 用Elman神经网络对车内驾驶员耳旁噪声进行识别和预测,提供噪声主动控制系统所需的参考信号。
In this paper, niche genetic algorithms are used to optimize the performance of a distributed 3 sensor OS CFAR detection system with different reference lengths and signal to noise ratios. 利用小生境遗传算法,对不同检测窗长度和检测信噪比的三传感器分布式OS-CFAR检测系统进行了优化设计,给出了一组针对不同检测环境与融合方式的搜索结果。
By testing and analyzing on domestic car under given working conditions, the position of maximum noise in engine compartment and the reason of radiation noise generated beside the driver s ear have been ascertained. This provides the reference for further lowering the noise of the given car. 通过对国产轿车在给定工况下的测试分析,确定出试验车发动机仓内最大噪声的位置、司机耳旁辐射噪声产生的原因,为进一步降低该车噪声提供了参考。
By researching the performance of the porous concrete on road vibration and noise reduction, the issue provided a useful reference to reduce noise pollution and vehicle vibration of Modern Pavement. 通过研究多孔水泥基路面混凝土材料的减振降噪性能,为降低现代路面工程的噪声污染、减轻车辆振动提供有益的参考。
This paper introduces the mechanical structure vibration noise simulation method and control method for mechanical structure which provides the certain reference value in the noise reduction. It can greatly reduce the vibration noise of the mechanical structure and improve the surrounding environment. 本文介绍的机械结构振动噪声的仿真模拟方法和控制方法为机械结构的减振降噪提供了一定的参考价值,可以大大地降低机械结构的振动噪声,改善了周围的环境。
But the performance is poor, because both chirp dispread reference and phase reference are dirty with noise. 由于相位的参考信号及解扩的参考信号都受到了噪声的污染,该解调方式的误码率性能差。
Simulation and experimental results are presented to illustrate the effectiveness of the proposed analysis. A method of using an internally synthesized signal of preset frequencies as the reference signal for transformer noise control is proposed. 仿真和实验结果表明了分析的有效性。从应用角度,提出了应用内部合成参考信号的方法实现变压器噪声的有源控制。