نتایج جستجو برای: stability and security therefore
تعداد نتایج: 16894530 فیلتر نتایج به سال:
this study was conducted to investigate the genotype¬×¬environment interaction effects on yield and yield components of wheat. ten cultivars of wheat were evaluated in 8 environments (combinations of two levels of nitrogen and four irrigation regimes) in growing season of 2006-2007 at the research farm of isfahan university of technology. based on the stability parameters of eberhart and russel...
Congestion and overloading for lines are the main problems in the exploitation of power grids. The consequences of these problems in deregulated systems can be mentioned as sudden jumps in prices in some parts of the power system, lead to an increase in market power and reduction of competition in it. FACTS devices are efficient, powerful and economical tools in controlling power flows through ...
investigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
Borders are known as places where government institutions implement their own law in a variety of ways and forms. Given the different approaches to border control and management, it can be seen that this issue is still viewed as a security issue in developing countries, including Iran, and most of the approaches related to this are from a purely security perspective. The boundary view must be m...
safflower (carthamus tinctorius l.) is one of the oilseed plants that can influence strongly on oilseed security because it is extremely compatible with environmental conditions. safflower is cultivated as second cultivation after combining cereals in isfahan. nowadays many attempts are performed to improve safflower oil quality to use in edible oil industry. in this study, quantity and quality...
Abstract: Voltage instability is a major threat for security of power systems. Preserving voltage security margin at a certain limit is a vital requirement for today’s power systems. Assessment of voltage security margin is a challenging task demanding sophisticated indices. In this paper, for the purpose of on line voltage security assessment a new index based on the correlation characteristic...
the issue of curriculum and syllabus evaluation and revision has been in center of attention right from when curriculum came into attention of educational institutions. thus everywhere in the world in educational institutions curricula and syllabi are evaluated and revised based on the goals, the needs, existing content, etc.. in iran any curriculum is designed in a committee of specialists and...
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