نتایج جستجو برای: natural network
تعداد نتایج: 1128616 فیلتر نتایج به سال:
As an important factor to be considered, rapid population growth, lack of resources and appropriate management has led the natural hazards threatening human societies increasingly. Although it is impossible to eliminate the effects of natural hazards, however, risk reduction and risk cities against natural phenomena has become the main topics of urban planning and design in recent years. Iran i...
In this study a modified entropy-based measure is presented for evaluating the serviceability level of water distribution networks in which the hydraulic uncertainties (flow rates in pipes) as well as the uncertainties due to mechanical parameters (failure probabilities of links) are considered simultaneously. In the proposed entropy calculation method, the connectivity order of the network dem...
a decrease in natural resources and their non-uniform distribution can affect social relationships between residents ofwatersheds, creating conflict and shifting groupings. the present study used the network analysis method to test thehypothesis that change in hydrologic parameters and water shortages in the village of tutang has led to the new groupingsin the social cooperation network of the ...
Extended abstract 1- Introduction Landslide as a morphological risk factor is the result of the operation of natural and environmental factors that, like other morphological irregularities, causes damage to human facilities, infrastructure, and property. One of the most significant works of geomorphology is the identification of stable landforms and places with minimal potential for catas...
Background & Aim: Development of an integrated health information system in order to prioritization of needs, sources devoting, diseases surveillance detecting and early responding is very important. Therefore, this comparative study has been done about natural disaster health information systems in Iran, Japan, and U.S.A in 2005. The aim is to provide logical proposes to reinforce for developi...
در تحقیق حاضر دو هدف کلی دنبال شده است. هدف اول یافتن مدل های احتمالاتی برای خرابی لوله های مدفون در حالات شایع بارگذاری لرزه ای است. دست یابی به مدل احتمالاتی خرابی لوله ها در واقع ابزار اصلی یافتن برآورد از زیان شبکه است. در محاسبه احتمال خرابی لوله ها پارامترهایی مانند خوردگی، ابعاد لوله و میزان نشست زمین مستقیماً در روابط داخل شده اند. که از این نظر مدل های پیشنهادی دارای امتیاز است. هدف دوم...
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