Aerosol filtration in fibrous filters is one of the principal methods of removal of solid particles from the gas stream. The classical theory of depth filtration is based on the assumption of existing single fiber efficiency, which may be used to the recalculation of the overall efficiency of the entire filter. There are several reasons for inappropriate estimation of the single fi...

In this paper, the Drift-Diffusion (DD), Schrödinger –Poisson transport (SP) and Density Gradient transport models (DG) are computed by parallel direct method and three different meshes. According to the results, the DD and DG model cannot be good approximation of SP model with respect to electron density simulation. In addition, a dense mesh is necessary for simulation of quantum effect. There...

in the present article, we focus on the numerical approximation of stochastic partial differential equations of itˆo type with space-time white noise process, in particular, parabolic equations. for each case of additive andmultiplicative noise, the numerical solution of stochastic diffusion equations is approximated using two stochastic finite difference schemes and the stability and consisten...

in this paper, integrated direct and reverse logistics considering production, distribution, customer, devastation, retrieval centers under uncertainty are developed. in this model, cost parameters are not certain, thus the scenario-based robust optimization method is applied. the aim of this model is to minimize the total cost and obtain a robust solution. finally, a practical case study is pr...

Numerical solutions to fractional differential equations can be extremely computationally intensive due to the effect of non-local derivatives in which all previous time points contribute to the current iteration. In finite difference methods this has been approximated using the ’short memory effect’ where it is assumed that previous events prior to some certain time point are insignificant and...

This paper demonstrates efficient solver technologies applied to the non-linear frequency domain (NLFD) method. The basis of the NLFD method is to assume the time period of the solution s oscillation and to transform both the solution and residual using a discrete Fourier transform. An unsteady residual is formed in the frequency domain and iteratively driven to a negligible value. This method ...

High throughput demands under complexityand power-efficiency has imposed numerous design challenges for the next generation multimedia systems. Multimedia (especially video) applications impose tight throughput constraints (e.g., frame resolutions beyond 1920×1080, at more than 30 FPS), which must be met by possibly resourceand battery-constrained underlying hardware. However, technology scalin...

ITERATIVE COMBINATORIAL AUCTIONS: ACHIEVING ECONOMIC AND COMPUTATIONAL EFFICIENCY David Christopher Parkes Supervisor: Lyle H. Ungar A fundamental problem in building open distributed systems is to design mechanisms that compute optimal system-wide solutions despite the self-interest of individual users and computational agents. Classic game-theoretic solutions are often prohibitively expensive...

This paper describes a number of hyperresolution-based decision procedures for a subfragment of the guarded fragment. We first present a polynomial space decision procedure of optimal worst-case space and time complexity for the fragment under consideration. We then consider minimal model generation procedures which construct all and only minimal Herbrand models for guarded formulae. These proc...

ORIGEN is a highly accurate code to model used fuel isotopic inventory evolution and associated radiation sources. The Oak Ridge Isotope Generation (ORIGEN) code is a depletion model to calculate neutron activation, actinide transmutation, fission product generation, and radiation source terms. This is done through analysis of the full isotopic transition matrix to solve the rate equations that...