near field holography

用法例句

We also describe the near-field holography theory concisely and highly accurate identification of sound source location and the distinction of neighboring sound sources through the experiment.

本文介绍了可视化空间声场和定位噪声源的一种强有力工具———近场声全息技术,对理论研究方法进行了概括阐释,并通过试验研究的方式高精确的辨认来源以及邻近声场。

The BEM-based near-field holography(NAH) was applied to reconstruct surface normal velocity of arbitrarily-shaped objects.

针对任意形状声源识别和定位问题,应用边界元法的近场声全息理论和标准Tikhonov正则化方法来控制场点声压测量误差对表面振速重构解的扭曲影响,由L曲线准则确定最优正则化参数,并通过实验证实了所述方法的有效性。

Algorithm and experimental investigation of patch nearfield acoustic holography based on wave superposition approach;

基于波叠加法的patch近场声全息及其实验研究

However due to the wraparound error associated with fast Fourier transform(FFT) ,the accuracy of separation technique based on FFT is not satisfactory and a novel separation method based on the statistically optimized nearfield acoustic holography is proposed to improve the separation.

在近场声全息技术的基础上,研究了基于声压-质点振速测量的单面声场分离技术。

A new method based on interpolation using orthogonal spherical wave source was proposed to enhance the resolution of the nearfield acoustic holography image without adding measurement points.

为了在不增加测量点数的情况下提高近场声全息图像的空间分辨率,提出一种基于正交球面波插值的近场声全息图像分辨率增强方法。

The cyclostationary near field acoustic holography (CYNAH) technique is proposed for cyclostationary sound fields in previous papers.

与普通近场声全息理论相比,循环平稳近场声全息理论可以更好地用于分析循环平稳声场。

The study state of NAH(near field acoustic holography)was introduced.

综述了基于遥感技术、图像处理技术和农业专家系统的作物病害胁迫检测方法,比较这三种方法研究进展及其优缺点,介绍了近场声全息技术研究现状,提出了基于近场声全息理论的作物病害胁迫检测的研究方法,为作物病害综合精准防治开辟了一条新的途径。

Three-dimension dynamical display of vibration modes reconstructed by near-field acoustic holography;

近场声全息重建振模的动态三维显示

A study of measurement point reduction in near-field acoustic holography

近场声全息(NAH)中减少测量点数的研究

According to the principle of near-field acoustic holography (NAH), the system of data acquisition and analysis needed in holographic experiments have been constructed.

根据近场声全息(NAH)的原理,建立了全息实验所需要的采集、分析系统。

For the conventional methods for noise sources identification can hardly be used in precisely analyzing the complex noise sources of underwater structures, the sound source identification technology based on the near field acoustic holography (NAH) theory has been carried out in this thesis.

由于传统源识别方法对水下结构产生的噪声声源进行准确分析有一定难度,本文开展了对近场声全息噪声源识别技术的研究。

The method of near-field acoustic holography(NAH) was applied to identify the noise source of a certain vehicle gearbox.

运用近场声全息法对某型车辆变速箱进行了噪声源识别试验,得到了不同工况下箱体表面辐射噪声的声功率谱和全息图,分析并确定了变速箱噪声的主要内部激励源和外部辐射源。

Under the Neumann boundary condition,the interior sound field of a cylindrical cavity with endcaps is reconstructed,based on nearfield acoustic holography(NAH).

在Neumann边界条件下基于近场声全息原理(NAH)重构了两端封闭的有限长圆柱壳体内部声场,计算出的结果与基于模态叠加法构建的内部声场进行比较,证明了重构方法的正确性,然后分别讨论了激励频率和全息面选择对NAH重构声场精度的影响以及重构面上不同位置的重构效果。

Research on Patch Nearfield Acoustic Holography and Resolution Enhancement of Nearfield Acoustic Holography

Patch近场声全息及近场声全息分辨率增强方法

A study of measurement point reduction in near-field acoustic holography

近场声全息(NAH)中减少测量点数的研究

Experimental Investigation on BEM-based Near-field Holography

基于边界元法的近场声全息实验研究

Study on Sound Source Identification Based on Patch Near-field Acoustical Holography

基于局部近场声全息的噪声源辨识研究

Research on Selection of Parameters and Reconstruction Error in the NAH Based on STSF

基于空间声场变换的近场声全息参数选取及重建误差研究

Factors affecting sound field reconstruction within a cylindrical cavity based on nearfield acoustic holography

基于近场声全息的圆柱壳体内部声场重构效果的影响因素

Algorithm and Implementation of Nearfield Acoustical Holography in the Interior Sound Field;

封闭空间内近场声全息变换算法及实现研究

Nearfield acoustic holography resolution enhancing method based on interpolation using orthogonal spherical wave source

近场声全息分辨率增强的正交球面波插值方法

Development and Application of NAH Measurement and Analysis System

近场声全息测量分析系统的开发及应用

Fault Feature Extraction Technique Based on Patch Near-Field Acoustical Holography

基于局部近场声全息的机械噪声源特征提取技术

STUDY OF SCANNING METHOD AND ITS TOLERANCE OF LINEAR ARRAY MICROPHONE BASED ON NAH

近场声全息线阵传声器“扫描”测量方法及其误差研究

In order to overcome the windowing effects and wraparound errors, statistically optimal planar near_field acoustical holography (SOPNAH) is used.

为了克服窗效应和卷绕误差 ,引入了统计最优平面近场声全息技术 .

Investigation on Statistically Optimal and Wave Superposition Methods Based Nearfield Acoustic Holography;

基于统计最优和波叠加方法的近场声全息技术研究

Theoretical and Experimental Study on the Distributed Source Boundary Point Method Based Nearfield Acoustic Holography;

基于分布源边界点法的近场声全息理论与实验研究

A Study on the Errors Existing in Measurement and Reconstruction of Nearfield Planar Acoustic Holography;

近场平面声全息的测量和重构误差研究

Active Noise Control Using Acoustic Holography in Local Free Space

利用声全息方法实现自由场局部有源噪声控制

Investigation on Acoustic Holography Technique for Underwater Sound Source Identification and Position by Continuously Scanning Sound Field

水下声场连续扫描声全息声源识别定位技术研究

Study on Characteristics of Evanescent Wave in Acoustic Field and Improvement of Holography Reconstruction Method

声场中倏逝波特性及改进全息重建方法的研究