نتایج جستجو برای: khalkhal
تعداد نتایج: 77 فیلتر نتایج به سال:
Background: The optimal management of hospitals as the most important centers for providing health services has always been the focus of decision makers and policymakers. The present study aimed to evaluate the technical efficiency of hospitals affiliated to Ardebil University of Medical Sciences using Artificial Neural Network (ANN) method. Methods: The present descriptive, applied, and cross...
در این پژوهش، مقادیر دبی های رودخانه های استان اردبیل با بهره گیری از مدل شبکه های عصبی مصنوعی و نیز با استفاده از توابع و امکانات نرم افزار matlab، مدل سازی شد. بدین منظور، از آمار بلند مدت ایستگاه های هیدرومتری رودخانه های این استان و برخی پارامترهای اقلیمی (دما، رطوبت نسبی، بارندگی و فشار) ایستگاه های سینوپتیک موثر بر میزان دبی های حوضه های این استان در طول دوره آماری 30 ساله (سال آبی 58-135...
Drought is the most important natural disaster, due to its widespread and comprehensive short and long term consequences. Several meteorological drought indices have been offered to determine the features. These indices are generally calculated based on one or more climatic elements. Due to ease of calculation and use of available precipitation data, SPI index usually was calculated for any des...
Iran is a wide and great land that is located on Alps earthquake belt of Himalaya. Great part of the urban and village residency of the country have been exposed to the intensive earthquake and destructive. Sarab city with several other cities, including Tehran, Karaj, Abyek, Qazvin, Roudbar, Khalkhal ,Tabriz, Marand and khoy are located on Earthquake belt that Earthquake risk is too hig...
introduction: drought is a creeping natural phenomenon, which can occur in any region. such phenomenon not only affects the region subjected to drought, but its adverse effects can also be extended to other adjacent regions. this phenomenon mainly starts with water deficiency (say less than long- term mean of variable under study such as rainfall, streamflow, groundwater level or soil moisture)...
estimation of genetic parameters for average daily gains and kleiber ratios in guilan province sheep
introduction: the genetic characterization of local breeds of sheep is of paramount importance, not only for conservation purposes but also for the definition of breeding objectives and breeding programmes. when records are nonexistent and breeds are not well defined in the field, information could be obtained from research station information where pedigree and performance records have been ke...
1. introduction droughts are long-term phenomena that can affect large areas and cause severe downturn in economic and social activities. recognizing this phenomenon, its features and properties, knowledge of facilities, capabilities and talents of areas and providing short and long term solutions leads to the effort of the surface water resource managers to prepare for drought mitigation. the ...
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