For stochastic systems where exact constitutive relations are unknown, a microscopic or molecular level description can be alternatively used. As microscopic simulations are computationally very expensive, there is a need for the development of robust algorithms capable of economically optimizing these noisy processes. In this paper, two approaches – an adaptive strategy using a gradient-based ...

Algorithms which seek global optima are computationally expensive. Alternatively, heuristic methods have been proposed to find approximate solutions. Because heuristic algorithms do not always deliver exact solutions it is difficult to verify the computed solutions. Such a problem is known as the oracle problem. In this paper, we propose to apply Metamorphic Testing (MT) in such situations beca...

Reflectance Transformation Imaging (RTI) is a technique that provides an enhanced visualization experience. The current acquisition methods for are time consuming and computationally expensive. This work investigates the idea of getting best light positions RTI using surface topography. We propose automating by estimating topography deep learning method followed unsupervised clustering method. ...

In this paper we present an enhanced evolutionary algorithm (EA) to solve computationally expensive design optimization problems. In this algorithm we integrate a genetic algorithm (GA) with a local search method to expedite convergence of the GA. We first use a GA to generate a population of data by evaluating real functions, then we construct computationally cheap surrogate models based on th...

The comparison between measured and simulated machining forces enables the evaluation of workpiece quality, process stability, tool wear condition. To compute that occur, mechanistic cutting force models are typically used. coefficients (CFCs) directly linked to mechanics chip formation and, thus, depend on tool-workpiece combination prevailing conditions. CFCs usually identified via average id...

Individuals and businesses are currently involved in the administration of remote sensing data that was previously handled only by government agencies. There is a lot more information than go through eye, retrieving it time-consuming computationally expensive. Clusters, distributed networks, specialized hardware devices essential to speeding up extraction calculations. HPC advances applications...

Abstract Geochemical processes in subsurface reservoirs affected by microbial activity change the material properties of porous media. This is a complex biogeochemical process that currently contains strong conceptual uncertainty. means, several modeling approaches describing are plausible and modelers face uncertainty choosing most appropriate one. The considered models differ underlying hypot...