recently many studies have been done on different issues of using multiple antennas at transmit and receive sides of a radar system in a mimo (multiple input multiple output) configuration. in addition, for the electronic warfare‟s purposes, the utilization of available signals of the environment to detect the targets has gained considerable attention in recent years. such passive radars use th...

many real world problems can be modelled as an optimization problem. evolutionary algorithms are used to solve these problems. ant colony algorithm is a class of evolutionary algorithms that have been inspired of some specific ants looking for food in the nature. these ants leave trail pheromone on the ground to mark good ways that can be followed by other members of the group. ant colony optim...

Abstract Model-based optimization of placement and trajectories wells in petroleum reservoirs by the means reservoir simulation forecasts is computationally demanding due to high number simulations typically required achieve a local optimum. In this work, we develop an efficient flow-diagnostics proxy for net-present-value (NPV) with adjoint capabilities computation well control gradients appro...

The oil and gas industry faces difficulties in optimizing well placement problems. These problems are multimodal, non-convex, discontinuous nature. Various traditional non-traditional optimization algorithms have been developed to resolve these difficulties. Nevertheless, techniques remain trapped local optima provide inconsistent performance for different reservoirs. This study thereby present...

Well placement optimization is considered a non-convex and highly multimodal problem. In this article, modified crow search algorithm proposed to tackle the well This article proposes modifications based on local niching techniques in (CSA). At first, suggested approach verified by experimenting with benchmark functions. For test functions, results of demonstrated higher convergence rate better...

Well placement optimization is a significant task in oil field development which aims to find the optimal well locations by maximizing net present value (NPV) or other objective function. It highly nonlinear problem involving large number of variables. Despite lots work has been done on conventional reservoirs, tool for naturally fractured reservoir (NFR) still rare. Naturally reservoirs repres...

In the most recent heuristic methods, the high potential buses for capacitor placement are initially identified and ranked using loss sensitivity factors (LSFs) or power loss index (PLI). These factors or indices help to reduce the search space of the optimization procedure, but they may not always indicate the appropriate placement of capacitors. This paper proposes an efficient approach for t...