The work concerns the a posteriori error estimation for the primal and the dual mixed finite element methods applied to the diffusion problem. The problem is considered in a general setting, with inhomogeneous mixed Dirichlet/Neumann boundary conditions. The new, functional-type a posteriori error estimators are proposed that exhibit the ability both to indicate the local error distribution and...

In this paper, a finite-input receding horizon controller (FIRHC) is proposed as motivated by the need to use solenoid valves to control the motion of a pneumatic hoping robot. The controller aims to the application on switching control systems in which only a finite number of control inputs are available. The controller utilizes a model to predict system behavior along a finite forward horizon...

In Automotive Industry, sliding door systems that are also used as body closures are safety members. Extreme product tests are realized to prevent failures in design process, but these tests realized experimentally result in high costs. Finite element analysis is an effective tool used for design process. These analyses are used before production of prototype for validation of design according ...

Wireless Body Sensor Networks (WBSNs) involve a convergence of biosensors, wireless communication and networks technologies. WBSN enables real-time healthcare services to users. Wireless sensors can be used to monitor patients’ physical conditions and transfer real time vital signs to the emergency center or individual doctors. Wireless networks are subject to more packet loss and congestion. T...

The control of processes with time delays is crucial in process industries such as petrochemical, hydraulic, and manufacturing. It a challenging task for automation engineers, it may affect both phase gain margins. In this case, robust system preferred. This article presents novel controller structure combining computational intelligence (CI) fractional-order control. A PID (FOPID) based on bio...

in this study the operations of melting of au15ag40 nanoalloy have been studied using the molecular dynamic simulations through the gupta multiparticle potential and the nonergodicity of simulations is eliminated by the multiple histogram method. the melting characteristics are determined by the analysis of variations in the potential energy. the calculations indicate that the melting of au15ag...

nowadays, the use of small vehicles is spreading among urban areas and one sort of these vehicles are three-wheeled vehicles (twvs) which can be competitive with four-wheeled urban vehicles (fwvs) in aspects such as smallness, simple manufacturing, and low tire rolling resistance, fuel consumption and so on. the most critical instability associated with twvs is the roll over. in this paper a ti...

In this paper, an adaptive robust observer-based scheme for the synchronization of unidirectional coupled chaotic systems with unknown channel time-delay and system uncertainties is proposed. The effects of time-delay arise from the physical characteristics of coupled channel, while the system uncertainties arise due to unknown but bounded external disturbances and parametric perturbations. By ...

The non-linear vibrations of a barrel, induced by the interaction with a high-speed moving projectile, negatively affect the shooting accuracy of a weapon. This study presents a new method that determines the non-linear behavior of the barrel with a passive vibration absorber and optimizes the absorber using the genetic algorithm (GA). Since both the barrel geometry and its coupling with the ab...