نتایج جستجو برای: frequency noise

تعداد نتایج: 648515  

Journal: :روش های عددی در مهندسی (استقلال) 0
مسعود سبحانی و احمدرضا تابش m. sobhani and a. a. tabesh

in this paper, a new algorithm for system identification based on frequency response is presented. in this method, given a set of magnitudes and phases of the system transfer function in a set of discrete frequencies, a system of linear equations is derived which has a unique and exact solution for the coefficients of the transfer function provided that the data is noise-free and the degrees of...

Journal: :Journal of Low Frequency Noise, Vibration and Active Control 2008

Traditional noise removal methods like Non-Local Means create spurious boundaries inside regular zones. Visushrink removes too many coefficients and yields recovered images that are overly smoothed. In Bayesshrink method, sharp features are preserved. However, PSNR (Peak Signal-to-Noise Ratio) is considerably low. BLS-GSM generates some discontinuous information during the course of denoising a...

Journal: :Active and Passive Electronic Components 1987

Journal: :The Journal of the Acoustical Society of America 1959

Journal: :Active and Passive Electronic Components 2002

درویشی, ابراهیم , علی آبادی, محسن , گلمحمدی, رستم ,

Introduction: In the steel industry,air blowers used to supply compressed air are considered as sources of annoying noise. This study aims to acoustics analysis of theairblower workroomand sound source characteristics in order to present noise controlmeasuresinthe steel industry. .Material and Method: Measurement of noiselevel and its frequency analysis was performed usingsound levelmetermod...

Journal: :The Journal of the Acoustical Society of America 1990

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