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Full-Text Articles in Engineering

Importance Sampling Based Algorithm For Efficient Reliability Analysis Of Axially Loaded Piles, Haijian Fan, Robert Liang Aug 2015

Importance Sampling Based Algorithm For Efficient Reliability Analysis Of Axially Loaded Piles, Haijian Fan, Robert Liang

Robert Y. Liang

In reliability analysis, the crude Monte Carlo method is known to be computationally demanding. To improve computational efficiency, this paper presents an importance sampling based algorithm that can be applied to conduct efficient reliability evaluation for axially loaded piles. The spatial variability of soil properties along the pile length is considered by random field modeling, in which a mean, a variance, and a correlation length are used to statistically characterize a random field. The local averaging subdivision technique is employed to generate random fields. In each realization, the random fields are used as inputs to the well-established load transfer method …


Verification Of Monte Carlo Calculations In Fast Neutron Therapy Using Silicon Microdosimetry, I. Cornelius, Anatoly B. Rosenfeld May 2008

Verification Of Monte Carlo Calculations In Fast Neutron Therapy Using Silicon Microdosimetry, I. Cornelius, Anatoly B. Rosenfeld

Anatoly Rozenfeld

Silicon microdosimetry measurements in Fast Neutron Therapy were simulated using the GEANT4 Monte Carlo toolkit. The possibility of using silicon microdosimeters for verification of Monte Carlo based treatment planning systems in hadron therapy is suggested.


Distribution Of Interactions In Binary Polymer Mixtures: A Monte Carlo Simulation Study, William Macknight, P. Cifra, F. E. Karasz Dec 1987

Distribution Of Interactions In Binary Polymer Mixtures: A Monte Carlo Simulation Study, William Macknight, P. Cifra, F. E. Karasz

William MacKnight

Phase transitions from miscibility to immiscibility were observed in simulations of binary polymer mixtures on a planar square lattice using reptation sampling techniques. The relationship between the phenomenological interaction parameter, x, and the true molecular interaction energy was followed, and the dependence of the number and distribution of heterocontacts in the mixture on the applied heterosegment interaction energy was determined. Deviations from the results of mean-field treatments, which overestimate the number of heterocontact.s, were observed even for athermal mixtures. Kinetically driven hysteresis governed by a temperature equilibration time scale was examined for the phase transitions. An important prediction of expansion …