the safety of buried pipes under repeated load has been a challenging task in geotechnical engineering. in this paper artificial neural network and regression model for predicting the vertical deformation of high-density polyethylene (hdpe), small diameter flexible pipes buried in reinforced trenches, which were subjected to repeated loadings to simulate the heavy vehicle loads, are proposed. t...

graphite oxide constitutes carbon network with oxygen atoms both on hexagonal arrangement and the edge sites. structural and electronic properties for graphite-oxygen complexes have been explored using first-principles total-energy calculations within the local density approximation (lda). band structures and density of states for the propose carbon 3d models are reported. a finite energy gap and...

Purpose: The objective of this work was to evaluate methods charging urban drainage fees in order finance and guarantee the maintenance operation a network residential subdivision located city Rio de Janeiro.
 
 Theoretical framework: intense growth associated with process soil sealing areas has caused, over years, increase occurrence intensity disasters related floods, reduce capacit...

Due to the existence of drainage networks, urban areas have formed their own hydrological mechanism. The pretreatment complex and elaborate network data has become a challenging step in building an model. This study proposes network-combing method based on potential outfall mechanism for system, analyzes topological structure underground network, generates subcatchment (SBPO). Two methods are c...

Hydraulic and hydrologic analysis in urban catchments is typically accompanied by a number of uncertainties, such as a lack of required information for modeling purposes or complex loops inside a drainage network. In this article, Gibbs’ stochastic network model is utilized in order to achieve a dendritic network that corresponds to a fully looped network in terms of the peak of the runoff hydr...

The building drainage system is one of only a small number of engineered fluid carrying systems which interconnects all parts of a building. As such, it permits air propagation throughout the entire building. Protection between the pathogen–laden sewer system and habitable space relies on the water seal within fixture traps (or U-bends). This water seal is vulnerable to a number of potential th...