نتایج جستجو برای: barrier

تعداد نتایج: 89945  

1994
VITALI G. ZHADAN

The present paper is devoted to the application of the space transformation techniques for solving linear programming problems. By using a surjective mapping the original constrained optimization problem is transformed to a problem in a new space with only equality constraints. For the numerical solution of the latter problem the stable version of the gradient-projection and Newton's methods ar...

M. Fathipour Z. Ahangari,

A comprehensive study of Schottky barrier MOSFET (SBMOSFET) scaling issue is performed to determine the role of wafer orientation and structural parameters on the performance of this device within Non-equilibrium Green's Function formalism. Quantum confinement increases the effective Schottky barrier height (SBH). (100) orientation provides lower effective Schottky barrier height in compa...

M. Amiri-Aref M. B. Aryanezhad N. Javadian R. Tavakkoli-Moghaddam

This paper investigates a multi-period rectilinear distance 1-center location problem considering a line-shaped barrier, in which the starting point of the barrier follows the uniform distribution function. In addition, the existing points are sensitive to demands and locations. The purpose of the presented model is to minimize the maximum barrier distance from the new facility to the existing ...

حسینمردی, سعید, ریاضی, نعمت‌اله,

  In this paper, we study particle aspects of the φ6 kinks in an external potential. The external potential is implemented by breaking the translational invariance of the system. The dynamics of the kink is calculated for the simple harmonic oscillator (SHO) and barrier potentials. The periodic motion of the kink in the SHO case is compared to the corresponding ordinary (classical) motion. It i...

Background and Objectives: In the early stages of brain ischemia, the production of free radicals increases. Salvia officinalis is a rich source of antioxidant compounds. Therefore, in this study the effects of hydroalcoholic extract of Salvia officinalis on blood -brain barrier permeability and neurological deficits have been studied. Materials and Methods: In this experimental study 35 m...

Journal: :the modares journal of electrical engineering 2011
mona ghassemi hossin mohseni kaveh niayesh amir abbas shayegani akmal

although in recent two decades, the concept of dielectric barrier discharges (dbds) have been developed in ozone production well, air pollution control, plasma screens and control of chemical, and biological and medical processes, employment of this concept for high voltage applications to improve insulation performance as an alternative to the pressurized gas-insulated systems (gis) utilizing ...

Journal: :international journal of nanoscience and nanotechnology 2012
a. nasiri m. shariaty-niasar shariaty-niasar z. akbari

improving barrier properties through the use of nanocomposites is an important area of research, especially for the food packaging industry. in this work, titanium dioxide (tio2 )/low density poly ethylene (ldpe) nanocomposites were synthesized as the oxygen barrier layers through the co-extrusion process. the oxygen permeability of the nanocomposite with 4% of tio2 decreased for about 16% comp...

Abbas ghavam, Abbas Yazdanpanah, Ali Khani Jeihooni, Mohsen Farbood,

Background & Objective: Knowledge growth has been very rapid in recent years. Health centers can implement knowledge management in their organization to improve service quality, reduce costs and time, strengthen relationships among colleagues, and produce knowledge faster by reviewing barriers to knowledge management implementation at fasa health center. Material & Methodes: In this qualitativ...

The purpose of this study is to investigate the economic and jurisprudential nature of barrier Option. Options are a type of derivative instrument in the financial markets that gives a person the right to buy or sell an asset without obligation. This tool is used along with other types of derivative tools to cover risk and speculation. Two kindes of barrier option are the Knock-In and Knock-out...

ژورنال: سلامت کار ایران 2009

  Background and aims   Traffic noise barriers are the most important measure to control the environmental noise pollution. Diffraction from top edge of noise barriers is the most important path of indirect sound wave moves towards receiver.Therefore, most studies are focused on  improvement of this kind.   Methods   T-shape profile barriers are one of the most successful barrier among many dif...

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