نتایج جستجو برای: steel building
تعداد نتایج: 295708 فیلتر نتایج به سال:
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خصوصیات دینامیکی به بسیاری از جزئیات رفتار مصالح و ترکیب سازه بستگی دارد با توجه به اینکه تمام این جزئیات را نمی توان در مدل های تحلیلی ملحوظ کرد. همیشه بین مدل های تحلیلی و سازه واقعی اختلافاتی وجود دارد. تعیین مستقیم این خصوصیات دینامیکی به وسیله آزمایش بر روی ساختمان های واقعی و مقایسه با نتایج تحلیلی است. که می توان به میزان دقت نتایج تحلیلی دست یافته و قابل قبول بودن نتایج تحلیلی قضاوت نمو...
In recent years, rehabilitation has been the subject of extensive research due to increased spending on building work and repair of built works. In all cases, it is absolutely essential to carry out methods of strengthening or repair of structural elements, and that following an inspection analysis and methodology of a correct diagnosis. The reinforced concrete columns are important elements in...
Feature selection is a typical stage of building any classification or regression model. There are several approaches to it, however one of the fastest is based on determining the relevance of each feature independently by calculating ranking values. In this paper we provide empirical comparison of four different ranking criteria that belong to two different groups information theory and correl...
The project of building a bridge is a canonical example of what John Law (1987) has termed ‘heterogeneous engineering’, involving the arrangement of human and nonhuman elements into a stable artifact. This paper reports ethnographic research on the work of civil engineers engaged in designing a bridge scheduled for completion by the year 2004. My emphasis is on a view of bridge-building as pers...
Introduction:Lead and zinc are among the most poisonous unnecessary heavy metals available in the environment and are among the first grade poisonous pollutants. In this study the efficiency of electrocoagulation process using alternating and direct current and iron and stainless steel rods for elimination of lead and zinc from battery industrial wastewater has been investigated. Methods:Wa...
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