A new on-line cancellation path modeling signal for active noise control is proposed in this paper. The signal is based on the spectrum of the disturbance signal, and is especially useful for the cancellation path modeling in active noise control when the disturbance signal is tonal. It is shown that using the proposed signal as the perturbation signal in modeling can significantly reduce the m...

Editorial Getting closer to reality in modeling image capture devices is crucial for the improvement of image quality beyond the limits of image restoration algorithms as we know them today. This calls for more accurate statistical modeling of distortions and noise coming from real capture devices (Poisson noise, internal non-linearities, space variant point spread functions due to nonideal opt...

Several studies find that return volatility of stocks tends to exhibit long-range dependence, heavy tailedness, and clustering. In this study, we use high-frequency data to empirically investigate whether a sample of stocks exhibit those characteristics. Because we do find those characteristics, as suggested by Rachev and Mittnik (2000) we employ self-similar processes to capture them in modeli...

Aiming to improve survey accuracy of Measurement While Drilling (MWD) based on Fiber Optic Gyroscopes (FOGs) in the long period, the external aiding sources are fused into the inertial navigation by the Kalman filter (KF) method. The KF method needs to model the inertial sensors' noise as the system noise model. The system noise is modeled as white Gaussian noise conventionally. However, becaus...

Gene networks arise due to the interaction of genes through their protein products. Modeling such networks is key to understanding life at the most basic level. One of the emerging challenges to the analysis of genetic networks is that the cellular environment in which these genetic circuits function is abuzz with noise. The main source of this noise is the randomness that characterizes the mot...

This paper gives an overview of the physics and modeling of noise in SiGe HBT devices and circuits, including RF broadband noise, low-frequency noise, and oscillator phase noise. The ability to simultaneously achieve high cutoff frequency (fT ), low base resistance (rb), and high current gain (β) using Si processing underlies the low levels of low frequency 1/f noise, RF noise and phase noise o...

in recent years noise has been well known as an environmental pollution. particularly its effects will be more serious in some environments including hospitals which patients need a calm and peaceful condition. this study aims to evaluate hospitals noise pollution level. this study is a cross-sectional study. noise measurements were made in all hospital wards in a workday and weekend from 8 to ...

This paper proposes a new structure for the feedforward active noise control (ANC) systems with online secondary path modeling. The proposed structure 1) uses the same error signal for updating the noise-control process as used for the modeling process, and 2) incorporates an averaging based filtered-reference algorithm in the noise-control process. The theoretical considerations are confirmed ...