Identification of Engine Surface Noise Source via Blind Separation Technique of AC Algorithms

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A stable vapor film is observed on the heater surface without noise and vibration during silent film boiling ;

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Study on Surface Noise Distribution of Three ring Reducer

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Surface radiating noise testing and research of engine using biodiesel

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The calculation of space-time correlation function of noise field of surface noise source with dipole radiation model

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In this paper the relationship between the structure vibration and the surface noise radiation is analyzed and deduced from the acoustic and vibrational theory .

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Identification and analysis of surface noise sources of marine diesel engine

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The distribution characteristics of surface radiated noise of a small and high speed automotive diesel engine493ZQ are analyzed .

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Study on Identification of Surface Radiated Noise Sources of Vehicle Engine

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Partial cylinder misfiring method is used to separate machinery noise and combustion noise . The radiating noise sources are identified with near field scan technique and the main part of surface radiating noise can be found .

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In this paper the surface noise distribution of 492Q engine was measured and analysed by means of complex acoustic intensity method .

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The results show that for the wind-related surface noise sources the noise field at frequencies above a few hundred Hz is clearly characteristic of the low-noise-channel for above-mentioned sea-hydrographic distribution and various sea-bottom types .

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Identification of Minibus 's Surface Noise Source

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The gain limitation of particle velocity and acoustic energy flux in the sea surface noise field and half-isotropic noise field is discussed based on orientation-exponent theoretic .

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Study on the Surface Noise Prediction for Aircraft Cruise

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A Study on Surface Noise Sources Identification for Diesel Engine

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The experimental results compared with using the method of covering the engine with lead show that the method of sound intensity with double-microphone is able to identify engine surface noise sources much more accurately and quickly .

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The local method for map building method is studied reasonable height model is used to remove surface noise . In this chapter calibration results and stereo matching results are tested by depth measurement .

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A Study on Surface Noise Distribution of 492Q Engine

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However road engineers and researches in all countries are always puzzled when choosing what kind of anti-slippery structure whose function must not only strengthen the anti-slippery performance but also reduce the road surface noise .

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Anisotropic degree of horizontal direction and vertical direction in the sea surface noise field are discussed .

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This study points out that pavement surface distress noise is mainly divided into impulse noise and Gaussian Noise .

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With the study of minbus 's accelerated exterior noise control the principle of sound intensity measurement was applied the sound intensity of a minbus 's surface noise was tested and the surface noise distribution was presented .

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The results of this paper proved that it is effective to reduce the engine surface noise by changing the structure parameters .

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In this article the time-space correlation function of acoustic pressure and particle velocity in the sea surface noise field are introduced .

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Surface noise The needle moves along the groove on a record .

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Research on the spatial character of surface noise in shallow sea based on vector sensor

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The contents of the thesis is : ( 1 ) Horizontal acoustic energy flux detector is maximum likelihood detector and maximum likelihood estimator in the sea surface noise field .

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This method is simple practical low cost does not affect the drilling operation . However seismic data while drilling is seriously affected by the strong surface noise and drill string propagation .

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