According to the standard of aircraft noise environment around Airport(GB9660-88)and with reference to the computing method ICAO(International Civil Aviation Organization)and SAE(Society of Automotive Engineers),this paper makes a detailed impact analysis of a certain civil airport s aircraft noise.

As the civil aviation industry developing,aircraft noise pollution is getting more and more serious environment problem.

Experiment on cavitation noise and vibration in liquid jet pump;

Effect of ultrasonic cleaning cavitation noise on lea rning and memory of rats;

Experimental investigation on cavitation noise of an axisymmetric body;

Temporal noise and spatial noise of CCD camera at different illuminance;

Monte Carlo simulations of spatial noise and Langevin equation;

Measurement results indicate that the spatial noise, temporal noise, signal average value and signal to noise ratio are increased with the increase of the cathode luminance of ICCD image intensifier, which accord with the performance of a.

It shows that an acceptable result through using noise space in covariance matix of array output, so that it is possible to improve the DOA estimation accuracy for high resolution signal.

A blind channel estimation technique based on noise space for multiple-input multiple-output(MIMO) orthogonal frequency division multiplexing(OFDM) systems was presented.