نتایج جستجو برای: energy
تعداد نتایج: 666269 فیلتر نتایج به سال:
استفاده واقعی از روش مونت کارلو به عنوان یک ابزار تحقیقاتی، به سال های پایانی جنگ جهانی دوم بر می گردد که در جریان ساخت بمب اتمی از آن استفاده کردند و از نمونه گیری های تصادفی برای این منظور بهره بردند. با پیشرفته تر شدن ابزارهای محاسباتی و ظهور کامپیوترهای پر- سرعت،استفاده از این روش در علوم مختلف به شدت گسترش یافت. در این پایان نامه، ابتدا به معرفی و تاریخچه روش مونت کارلو پرداخته و سپس با ا...
many mobile and off-grid devices include electronics and other electrical consumers like servo drives, which need a quite low supply power. since the price for photovoltaic modules drops continuously, photovoltaic power supply is interesting in more and more applications. in solar powered systems, a battery is needed to store energy for the night and cloudy periods. the power electronics of suc...
nowadays, in consideration of environmental issues and limitation of fossil fuels, there is a particular consideration of renewable energy including ocean energy, that can extracted going through various methods such as wave energy, tidal energy, salinity gradient, otec: ocean thermal energy conversion.herein this research, operation of otec method in southern caspian sea has been discussed. fo...
geothermal investors need to be confident with the methods and results of exploration programs. also cutting the upfront cost of geothermal exploration will further encourage investors to consider investment in this emerging clean energy field. hence, it is of paramount importance to improve prospecting techniques in order to explore where economic concentrations of geothermal energy are to be ...
the renewable energy sources and plug-in electric vehicles (pevs) are becoming very popular because of the combination of high fuel costs and concerns about emission issues. this paper presents modelling and control of a building integrated fuel cell and plug-in electric vehicles (bifc-pev) in smart distribution systems. in bifc-pev system, conventional building elements could be replaced by sp...
in this paper, a study and design of energy conservation actions and the obtention of energy efficiency titles, according to the italian ministerial decree 20th july 2004, applied to lighting and electrical systemsin a school district managed by perugia province (italy), is presented.specifically, the analysis regarded the replacement of neon lamps with high efficiency ones, and the power facto...
the present study was conducted on efficiency of utilization of dietary energy for milk production in lactating crossbred cattle. 18 lactating crossbred cattle of early to mid-lactation, approximate body weight (375.39±23.43 kg), milk yield, parity and stage of lactation were divided into three groups of six animals each and were fed 0, 50 and 100% diammonium phosphate (dap) in the mineral mixt...
in italy, several policy measures have been implemented in order to increase energy efficiencyand reduce carbon emissions especially concerning the household sector. however, in order to design andimplement these policy measures efficiently, it is necessary to get a better understanding of the factorsinfluencing household energy behavior. in this paper, by using disaggregated data from the 2009...
this paper applied a non-parametric (data envelopment analysis) method to analyze the efficiency of farmers, discriminate efficient farmers from inefficient ones and to identify wasteful uses of energy in order to optimize the energy inputs for greenhouse cucumber production in lorestan province of iran. data were collected from 27 cucumber producers by using a face-to-face questionnaire.dea cr...
In this paper, non parametric Data Envelopment Analysis (DEA) was subjected to the energy data of wheat producers in Punjab state, India, and technical, pure technical and scale efficiencies were calculated for farms both category wise and zone wise. The main objective was to determine the strength of the correlation between non-parametric efficiencies and indices such as energy ratio and speci...
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