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In this paper, a composite medium based metamaterial with random distribution of nanoparticles in vacuum host to achieve negative effective refractive index in the visible wavelength range is suggested for invisibility purposes. Our calculations show that structures including single metal (dielectric) spheres and core-shell structures with metallic core and dielectric shell, which consists two-layer...
In this paper, design and implementation of a position error based (PEB) controller scheme is presented. An H∞ robust controller is employed to guaranty the stability and performance of the slave robot in the presence of various uncertainties, such as unmodeled dynamics or external forces acting as disturbances. A nonlinear small-gain stability analysis is performed in order to prove ability of the...
Hydraulic systems are important in industry and different methods have been proposed to control them. The hydraulic system is one of systems that its model changes gradually. In this article, two different types of fuzzy PI controllers (double input fuzzy PI and fuzzy gain scheduling controller) are designed and implemented on hydraulic plant that they are Independent from model of system. Double...
We have proposed a new dual band quantum cascade photodetector with ability of detecting UV and IR through two independent paths. Because of large band gap of GaN and AlGaN, we have used AlxGa1−xN/AlN quantum wells. For detecting of IR and UV intersubband and interband transitions have been used respectively. For IR and UV path we have achieved peak of Responsivity about 60 mA/W at 2.7 um and 25 mA/W...
This paper presents two alternative approaches to characterize the pharmacodynamics of propofol anesthesia in children, using State Entropy as a clinical end point. The first approach is the traditional approach where the pharmacodynamic model is described in terms of an effect-site equilibration rate constant and the Hill equation. In the second approach (the monitor-decoupled approach) the dynamics...
Previous work of estimating needle trajectories using un-calibrated camera-based tracking ("touchless" needle guide) is extended here to real ultrasound imaging. Using 4D ultrasound, this technique can be used as a needle guide during percutaneous procedures. A pair of miniature cameras captures images and the ultrasound system captures a volume as the needle moves through the workspace...
A pose estimation method is proposed for measuring the position and orientation of a needle. The technique is to be used as a touchless needle guide system for guidance of percutaneous procedures with 4D ultrasound. A pair of uncalibrated, light-weight USB cameras is used as inputs. A database is prepared offline, from the needle line estimated from camera-captured images and from the true needle...
In this paper, specifications, design and implementation issues of a comprehensive corpus of capital isolated handwritten character images for Persian/Arabic languages are reported. The corpus has been designed for both OCR development and evaluation purposes. The corpus contains more than 10 million characters with appropriate image quality and is supported with rich standard ground truth formatted...
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