نتایج جستجو برای: input output table
تعداد نتایج: 454859 فیلتر نتایج به سال:
چکیده : ofdm یک تکنیک مدلاسیون برای ارسال داده با سرعت بالا در کانال محو شدگی چند مسیره است. مهم ترین عاملی که سیستم های siso-ofdm (single-input single output ofdm) را با مشکل مواجه می سازند منابع تداخل می باشد. به منظور حذف تداخل استفاده از آنتن های آرایه ای در گیرنده سیستم های ofdm پیشنهاد شده که simo-ofdm (single-input multiple-output - ofdm) نامیده می شود. یکی از راههای افزایش ظرفیت کانال ...
considerable indirect taxes are obtained to finance different expenditures of governments. the indirect taxes have different and to somewhat contrary effects in the economy. this paper investigates on the effects of the indirect taxes on sectors’ products to finance the government expenditures. using an input-output analysis, the effects of this policy on the cost-push price inflation and emplo...
energy is one of major factors of productions in all of economic sectors, which have important effect on a country economy. the effect of increasing price of energy carriers on productions of economic sectors is inevitable. therefore, this research was conducted by using the input - output model and product forecasting. the study investigated the latest available input - output table in 1385. t...
Up to three decades ago, economic statistics could systematically meet the statistical needs and economic views quantitative analyses requirements (known as growth – centered views) in the framework of national accounts and input-output tables. However, owing to the insensitivity of these views to simultaneous survey of socio-economic issues, no attention has been paid to systematizing social s...
wheat is the dominant cereal crop constituting the first staple food in iran. this paper studies the energy consumption patterns and the relationship between energy inputs and yield for wheat production in iranian agriculture during the period 1986 – 2008. the results indicated that total energy inputs in irrigated and dryland wheat production increased from 29.01 and 9.81 gj ha-1 in 1986 to 44...
this paper tries to systematically survey, with taking theoretical view on geomorphic basin and its changes into account. the purpose of this research is to determine the balance and stability of geomorphic basins from the past to present and then to future. consequently, it tries to determine the balance between energy and input-output materials for example (rainfall , solar radiation, tectoni...
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