We propose a facet-based RDF data exploration mechanism that lets the user visualize large RDF datasets by successively refining a query. The novel aspects of our work are: i) the SPARQL query pattern is visualized as a query graph, ii) the successive refinements are visualized in a query refinement graph, and iii) the result triples are visualized as a result RDF graph. The scheme is scalable ...

The accuracy of large-eddy simulations is limited, among others, by the quality of the subgrid parameterisation and the numerical contamination of the smaller retained flow structures. We review the effects of discretisation and modelling errors from two different perspectives. We first show that spatial discretisation induces its own filter and compare the dynamic importance of this numerical ...

Spray modeling is a critical component to engine combustion and emissions simulations. Accurate spray modeling often requires a fine computational mesh for better numerical resolutions. This, in turn, will require extensive computer time. A major concern for the successful application of computational methods in an industrial environment is its capability to handle complex configurations with a...

A variational h-adaptive finite element formulation is proposed. The distinguishing feature of this method is that mesh refinement and coarsening are governed by the same minimization principle characterizing the underlying physical problem. Hence, no error estimates are invoked at any stage of the adaption procedure. As a consequence, linearity of the problem and a corresponding Hilbert-space ...

We propose the use of the meshfree radial basis point interpolation (RBPI) to solve the Black–Scholes model for European and American options. The RBPI meshfree method offers several advantages over the more conventional radial basis function approximation, nevertheless it has never been applied to option pricing, at least to the very best of our knowledge. In this paper the RBPI is combined wi...

the objective of this study was to develop a cost minimizing pattern for cube sugar and sugar transportation from production centers to refinement and storage centers and finally to distribution and consumption  centers in  fars province. producing centers are marvdasht (27.3%), eghlid (27.9%), fasa (11.3%), kavar (7.3%) and mamasani (20.2%). some of the province’s cube sugar and sugar is provi...

In finite element methods, the accuracy of solution cannot increase indefinitely since round-off error related to limited computer precision increases when number degrees freedom (DoFs) is large enough. Because a priori information highest attainable great interest, we construct an innovative method obtain given order elements. this method, truncation extrapolated it converges at asymptotic rat...

Urgent calls to transform societies toward more sustainability make the practice of anticipation and necessary. The progressive development computational technologies has opened room for a growing use quantitative methods explore future social-ecological systems, in addition qualitative methods. This warrants investigating issues power relationships discontinuities unknowns that arise when ming...