depth estimation of the top of the bedrock in the sedimentary basins is the main goal in geomagnetic explorations. the depth estimation of this kind of anomalies can be done using different methods, in the cases where the bedrock is magnetized. in this article, we use the standard euler deconvolution method and its results to interpret the magnetic data from the reshm region in semnan province ...

This brief addresses a new method for autoregressive (AR) parameter estimation from colored noise-corrupted observations using a damped sinusoidal model for autocorrelation function of the noise-free signal. The damped sinusoidal model parameters are first estimated using a least-squares based method from the given noisy observations. The AR parameters are then directly obtained from the damped...

By Euler integration we mean the integration of definable functions on R against the Euler characteristic. We investigate the structure of the ring of all definable functions (with compact support respectively), the multiplication being defined by the convolution with respect to the Euler integration.

in this paper, we present a comparative study between the adomian decomposition method and two classical well-known runge-kutta and central difference methods for the solution of damped forced oscillator problem. we show that the adomian decomposition method for this problem gives more accurate approximations relative to other numerical methods and is easier to apply.

We present the first results from an ongoing survey to discover and measure the metallicity of z > 3 damped Lyα systems with the Echellette Spectrograph and Imager (ESI) on the Keck II telescope. Our motivation arises from a recent study on the damped Lyα systems suggesting only mild evolution in the cosmic metallicity from z ∼ 2 to 4. The Echellette Spectrograph and Imager, which provides two ...

The mean metallicity of the thick disk of the Galaxy is 0.5 dex higher than that of the damped Lyα systems. This has been interpreted to argue that stars in the former do not arise out of gas in the latter. Using new metallicity and H I column-density data we show the metal-rich damped systems do contain sufficient baryons at the thick-disk metallicity to account for the stellar masses of thick...

For many years the Butterworth lowpass filter has been used to smooth many kinds of biomechanical data, despite the fact that it is underdamped and therefore overshoots and/or undershoots data during rapid transitions. A comparison of the conventional Butterworth filter with a critically damped filter shows that the critically damped filter not only removes the undershooting and overshooting, b...

• We study the Langevin equation describing diffusion in tilted periodic potentials. • In the over-damped limit the long time average velocity converges in probability. • In the over-damped and vanishing noise limit the convergence rate varies as the tilt crosses threshold. • In the under-damped limit we recover Risken's results about the bi-stability. • In the under-damped limit we derive asym...

We deliver a novel approach towards the variational description of Lagrangian mechanical systems subject to fractional damping by establishing restricted Hamilton’s principle. Fractional is particular instance non-local (in time) damping, which ubiquitous in engineering applications. The principle relies on including derivatives state space, doubling curves (which implies an extra mirror system...