Estimation of Sand Volume at Earth Filling Work with Geotextiles

Identification of Chemotaxis Models with Volume-Filling

Chemotaxis refers to the directed movement of cells in response to a chemical signal called chemoattractant. A crucial point in the mathematical modeling of chemotactic processes is the correct description of the chemotactic sensitivity and of the production rate of the chemoattractant. In this paper, we investigate the identification of these nonlinear parameter functions in a chemotaxis model...

Estimation of pore water pressure in the body of earth dams during construction with intelligent models

One of the basic measures in managing the stability of earth dams is to accurately estimate the amount of pore water pressure in the body of the dam during and after its construction. In this study, three different models of artificial neural network (ANN), adaptive neural-fuzzy inference system (ANFIS) and gene expression programming (GEP) to estimate the pore water pressure in the body of Kab...

Sand Dunes on Mars and on Earth

Analytical estimation of natural frequency in earth dams with respecting to the foundation effects

There are varieties of techniques for calculating natural frequency of the structures. Nevertheless, these equations are less developed in the geotechnical structures such as slopes, buttress group, dams, and retaining walls. In earth dams, with respecting to the dimensions and weight of dam, soil-structure interaction is of prime importance for finding seismic parameters including natural freq...

Volume Filling Factors of the Dig

Combining dispersion measures, distances and emission measures for 157 pulsars lying above | b |> 5 and between 60 < l < 360 we find the mean volume filling factor (f̄v) of the diffused ionized gas in the Milky Way. This filling factor is inversely related to the mean electron density (n̄c) in the clouds, f̄v = (0.0184± 0.0014)n̄c , implying a nearly constant average electron density distribution w...