نتایج جستجو برای: failure analysis
تعداد نتایج: 3120164 فیلتر نتایج به سال:
In the past, rock slope stability analysis were performed either graphically or using a hand-held calculator, but nowadays there are variety of slope stability analysis which can be used according to the field condition and potential failure mode. In 2-D analysis, effect of convex and concave walls are neglected, however concave slopes are believed to be more stable than straight walls due to t...
the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...
Background: As for high prevalence and incidence of heart failure, it can impose huge health, economic, and social burden on society. Education and self-care are important aspects of management in patients with heart failure, which can control the disease complications. This study aimed to investigate the effect of family-centered education approach on self-care behaviors of the patients wi...
background: academic failure of medical and medical sciences students is one of the major problems of higher education centers in many countries. this study aims to collect and compare relevant researches in this field in iran. methods: the appropriate keywords were searched in the national and international databases, and the findings were categorized into related and non-related articles acco...
water is the most essential component for sustaining lives of humans and other living creatures. supplying potable water with adequate residual pressure is a fundamental responsibility of city administration, which they do during normal conditions. but sometimes, abnormal conditions are formed resulting pressure deficient conditions during the daily operations of water distribution networks. th...
background and purpose: identification of the effects of sleep disturbances on the quality of life could result in proper treatment of patients with heart failure. this study aimed to investigate the relationship between sleep disorders and erectile dysfunction, depression and quality of life in male patients with systolic heart failure. methods: this correlational study was conducted on 100 ma...
Background: Hemodialysis is the sole way for management of patients with End Stage Renal Disorders (ESRD). Nowadays, inserting arteriovenous fistula is one of the most common methods for effective hemodialysis. Several factors have been reported for failure of arteriovenous fistulas such as diabetes, biochemical factors, low hemoglobin and increased level of blood calcium and phosphorus. Decisi...
Due to the immense damage caused by dam failure, especially dams constructed near large cities, it is necessary to consider the breaking phenomena as well as studying and designing different parts of the dam. For this purpose, the hydrograph of the outflow due to dam failure must be identified according to size of the fracture and then flood routing, and flood zone must be determined based on t...
because it is not possible to recognize the mechanism of cantilever failure in field studies, this type of common failure in riverbanks is investigated in the laboratory. for this purpose, two samples of susceptible soil that forms an overhanging block in riverbanks are used for physical model tests to determine their physical, chemical and mechanical characteristics. soil blocks of different d...
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