نتایج جستجو برای: White Noise

تعداد نتایج: 361249  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده نقشه برداری 1389

بازیابی میدان جاذبه زمین در مقیاس جهانی به صورت ضرایب هارمونیک کروی با استفاده از مشاهدات ماهواره های اختصاصی ثقل سنجی، به روش های مختلفی صورت می گیرد. برای بازیابی از روش اندازه گیری شتاب و روش انتگرال انرژی استفاده شده است. در این دو روش، محاسبه بردار شتاب و سرعت ماهواره برای بازیابی میدان جاذبه با استفاده از روش های مشتق گیری عددی ضروری می باشد. روش های مشتق گیری نیوتن، اسپیلاین و تیلور و فو...

Journal: :journal of advances in computer research 2010
pooya davari

in many active noise control (anc) applications, an online secondary pathmodelling method that uses a white noise as a training signal is required. this paperproposes a new feedback anc system. here we modified both the fxlms and thevss-lms algorithms to raised noise attenuation and modelling accuracy for theoverall system. the proposed algorithm stops injection of the white noise at theoptimum...

In many active noise control (ANC) applications, an online secondary path modelling method that uses a white noise as a training signal is required. This paper proposes a new feedback ANC system. Here we modified both the FxLMS and the VSS-LMS algorithms to raised noise attenuation and modelling accuracy for the overall system. The proposed algorithm stops injection of the white noise at the op...

In many active noise control (ANC) applications, an online secondary path modelling method that uses a white noise as a training signal is required. This paper proposes a new feedback ANC system. Here we modified both the FxLMS and the VSS-LMS algorithms to raised noise attenuation and modelling accuracy for the overall system. The proposed algorithm stops injection of the white noise at the op...

Several approaches have been introduced in literature for active noise control (ANC)systems. Since Filtered-x-Least Mean Square (FxLMS) algorithm appears to be the best choice as acontroller filter. Researchers tend to improve performance of ANC systems by enhancing andmodifying this algorithm. This paper proposes a new version of FxLMS algorithm. In many ANCapplications an online secondary pat...

Journal: :iranian journal of science and technology (sciences) 2013
r. farnoosh

the stochastic models for ship heave motion in irregular sea waves based on white and colored noises are examined. for this purpose the deterministic model transfers to stochastic models by adding different noise terms in force and then these models are solved analytically and numerically. finally an investigation is undertaken to examine the parameter estimation problem of second order stochas...

Journal: :international journal of occupational and environment medicine 0
sa moussavi-najarkola department of occupational health, school of medical sciences, tarbiat modares university, tehran a khavanin department. of occupational health, school of medical sciences, tarbiat modares university, tehran r mirzaei department of occupational health, health promotion research center, zahedan university of medical sciences, zahedan m salehnia department of anatomical sciences, school of medical sciences, tarbiat modares university, tehran a muhammadnejad cancer research center, iran cancer institute, tehran university of medical sciences, tehran m akbari department of audiology, school of rehabilitation, iran university of medical sciences, tehran

background: noise-induced hearing loss (nihl) is one of the most common occupational illnesses. most of the studies on nihl were conducted at high noise levels that people are rarely exposed to but in industries. the function of the outer hair cells (ohcs) is impaired after exposure to industrial noise. distortion product otoacoustic emissions (dpoaes) are useful in examination of noise-induced...

Background and purpose: Irreversible damage to the inner ear is known as noise-induced hearing loss (NIHL). Exposure to excessive noise can affect the expression of genes in molecules involved in development of NIHL. SLC26A4 gene or PDS is responsible for causing both syndromic and non-syndromic deafness and is located at DFNB site. The aim of this study was to investigate the expression level ...

فرهاد شهبازی, , مهدی بوربور, ,

  Level crossing is a powerful method for analyzing the random time series. In this paper by introducing this method we investigate the beta noises and represent differences between 1/f noise and white noise and also research the cardiac heart interbeat interval (RR) time series and find clear distinctions between healthy samples and samples with Congestive heart failure (CHF) disease.

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