نتایج جستجو برای: impact energy

تعداد نتایج: 1387768  

Energy as one of the factors of production along with labor and capital has an important role in development and social welfare. Due to the pollution of non-renewable resources and its negative impact on welfare, the use of renewable resources can improve social welfare by eliminating pollutants. In this study, the effect of renewable and non-renewable energy consumption on social welfare of de...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

According to the energy crisis in the world, optimization of energy consumption is indispensable. Technological advances in constructions and application of renewable energy resources demand saving energy. Atrium, as one of the construction elements, catches sufficient daylight and acts as a passive solar element and results in a decline of energy consumption. This research seeks to evalu...

خوشخوی, مهدی, صادقی شاهدانی, مهدی,

Energy consumption efficiency is one of the most important concerns in urban communities allotted more than 70 percent of Iran’s population to itself. Since energy efficiency index that is one of the targeted components in resistance economy policies has been reduces, it is necessary to design and adopt comprehensive, efficient, and integrated policies in order to improve efficiency and product...

Journal: :international journal of advanced biological and biomedical research 2013
ashkan nabavi-pelesaraei ahmad sadeghzadeh mir hossein payman hassan ghasemi mobtaker

the objectives of this research were to investigate influences of energy inputs and energy forms on output levels and evaluation of co2 emissions for hazelnut production in guilan province of iran. moreover, the sensitivity analysis was done by marginal physical productivity (mpp) method for energy inputs and energy using linear regression. initial data were collected from 120 orchardists in se...

Journal: :international journal of automotive engineering 0
mokhtari farhadi

automobile light weight structural composites are subjected to the various loadings in their service lives. honeycombs are increasingly used as core structures in automobile light weight structures as energy absorbers. in this paper the energy absorption of honeycomb panels under impact of cylindrical projectile is numerically and experimentally studied. the effect of the core materials and cro...

شیری, اردشیر, محمدی, اسفندیار, مختاری‌فر, مهدیه,

Energy consumption efficiency is one of the most important concerns in urban communities allotted more than 70 percent of Iran’s population to itself. Since energy efficiency index that is one of the targeted components in resistance economy policies has been reduces, it is necessary to design and adopt comprehensive, efficient, and integrated policies in order to improve efficiency and product...

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For many years, the issue of climate pollution has been seriously addressed and has involved the minds of politicians, statesmen and even the general public. Hence, we decided to study the relationship between energy consumption, financial development, economic growth, energy prices, and urbanization during the 1970- 2016 period by applying the Boundary Test Approach and applying it to Distribu...

The energy absorbing capability is one of the most important aspects of crushing behavior of a structure subjected to axial impact. In this paper, a simple practical method is introduced to enhance the crushing behavior of this kind of structure. The axial impact of metallic energy absorbing thin-walled tubes with special shaped cross-section is simulated using LS-DYNA software. The effect of c...

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