1、

In this paper an experimental investigation was carried out, and it is proved: no matter whether tip vortex cavitation is visible, narrow band noise peak is connected with the flow near the tip of propeller.

本文用实验证实这种窄带噪声峰与桨叶梢部流动有关,无论梢涡空泡可见与否,都可能出现。

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2、

Simulation results for the structural acoustical coupling in enclosed space show that the structure-brone noise can be reduced effectively in assigned frequency band, the maximum control value for noise peak value is near 20 dB ( A).

封闭空间结构振动声耦合反馈力控制仿真结果表明:通过合理选择性能加权函数,噪声可以在指定频带得到良好的控制,最大噪声峰值近20dB(A)。

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3、

Re-sults: In the three measurements, the peak measurement method had the highest reliability, the best repetition, the least sensitivity to noise, and not to be influenced by threshold setting up.

结果:三种测量方法中,以最大值法的可靠性最高,重复性最好,对噪声的敏感性小,且不受阈值设置的影响。

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4、

The comparative results of noise parameter in the field were: The maximum linear peak ( 122.6-142.4dB), variability of peak and total range of A-weighted root-mean-square level with slow time constant ( LAS) in the drop-forging noise were evidently greater than those in the weaving noise;

现场噪声参数比较结果:锤锻声最大线性峰值(122.6~142.4dB)和峰值的变化以及A计权慢档均方根值(L(AS))的全距,均明显大于织布声;

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5、

Numerical results show that the edge of switching window of a TOAD device becomes sharper and the over-shoot peak in the tailing edge of switching window becomes more obvious when the ASE noise is considered.

数值结果表明,在考虑ASE噪声情况下,TOAD的开关窗口的边沿更陡,在开关窗口的尾部还会出现明显的小峰。

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6、

Normal mode noise is detected as a peak noise or deviation in a DC signal.

如图1-5所示,串模噪声是叠加到希望的输入信号上的误差信号。

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7、

Reduction of random noise for seismic data by time-frequency peak filtering

用时频峰值滤波方法消减地震勘探资料中随机噪声的初步研究

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8、

The source of the subsystem response spectrum peak is studied using statistical energy analysis ( SEA) and mass loading effect: A review is made about drawback of acoustic noise test spectrum ( trapezoid)( MIL STD 810E 515.4 and GJB 150 17);

本文应用统计能量分析(SEA)及质量载荷效应,研究了子系统响应谱峰值的来历;评述了MIL-STD-810E-515.4及国军标GJB-150-17中噪声试验(梯形)谱的缺陷;

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9、

An exponential attenuation model of main peak about white noise's ambiguity function is analyzed, and the numerical formula of the model is deduced.

分析适用于模糊区与近似清晰区的白噪声模糊函数中心主峰附近的指数衰减模型,推导了模型参数的数值计算公式。

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10、

In this paper, comparative studies on the memory responses of white mice to earthquake premonitory thunders with a main peak frequency of 200 Hz and to pink noise are given.

本文比较研究了小白鼠对主峰频率200Hz的前兆性轰隆声和对粉红噪声的记忆反应。

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11、

the spectrum level of microseismic noise tends to peak at about 16 hz

微震的噪声谱在16赫趋于峰值。

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12、

the influence of peak height, peak position and noise are investigated using synthetic data.

采用合成数据测定了峰高、峰位置及噪声对结果的影响。

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13、

the model 2182a provides a selection of filter settings to optimize system noise rejection and ensure proper peak detection.

2182A具有选择滤波器设置的能力,可以使系统的噪声抑制能力达到最优化,并保证合适的峰值检测能力。

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14、

The spectrum level of microseismic noise tends to peak at about 1 / 6 Hz.

微震的噪声谱在1/6赫趋于峰值.

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15、

It performs better than widely used mean square error and peak signal to noise ratio.

该方法性能高于常用的均方误差和峰值信噪比图像质量评价方法,且简单有效.

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16、

The experimental results show that compared with the physical peak signal to noise ratio ( PSNR), correlation of the objective test parameter in this paper with the subjective evaluation the result is greatly improved.

实验表明,加权后的客观测试指标,较物理峰值信噪比(PSNR),与主观评价结果的相关性更高。

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17、

Simulation results show that the average peak signal noise ratio is increased with various video sequences.

实验结果显示,对不同的视频序列,其峰值信噪比均有不同程度的提高.

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18、

The Source of Response Spectrum Peak and Drawback of Acoustic Noise Test Spectrum

响应谱峰值来历与噪声试验谱的缺陷

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