in this work, response surface methodology (rsm) and artificial neural network (ann) were used to predict the decolorization efficiency of reactive red 33 (rr 33) by o3/uv process in a bubble column reactor. the effects of four independent variables including time (20-60 min), superficial gas velocity (0.06-0.18 cm/s), initial concentration of dye (50-150 ppm) and ph (3-11) were investigated us...

This paper attempts to give the solution for the urban scenario using DV cast protocol. Normally DV cast protocol is the best solution for highway traffic. But this paper proposed urban dv cast (UDV) protocol to deal with the urban traffic. This UDV protocol is extension of DV cast protocol. Our aim is to address the urban scenario where vehicles are equipped with sensors or wireless devices to...

Background & objectives: The urban rail transport network is always at risk due to its special conditions. Many cases indicate the existence of threatening and risk factors for human societies in urban rail transportation systems. Therefore, in this study, with the aim of identifying and prioritizing the risks of urban rail transportation networks in order to increase resilience is on the agend...

In the last years, the sensitive increase of congestion phenomena in the urban areas has produced important changes for the role reserved to the public transport. This should become the main tool to solve urban transport problem. Critical phase for the planning of the public transport system is the network design problem (determination of routes and associated frequencies). This step may affect...

extended abstract 1. introduction the important roles played by green space are the social, economic, cultural and environmental aspects of sustainable development. thus, the quality and quantity of green space should be appropriate to the physical size of the city and the needs of society and also it should be developed according to the ecological conditions of the city and its future developm...

Combined with the GPRS (General Packet Radio Service) technology, Geographic Information Systems (GIS) extends its abilities from static to dynamic working environment for urban drainage network. In this paper, a framework of Web-GIS for the urban drainage network management system is presented. This three-layer system framework is based on the J2EE technologies. The principles of data structur...

Methods to solve natural gas loadflow problems using electric loadflow techniques are presented. The motivation is to integrate a natural gas network with an electric power transmission network so that the network analysis for a combined natural gas and electric power distribution network can be performed in a consistent manner. The issues arising from solving gas loadflow problems are discusse...

The ecodesign of urban environments at different spatial scales6 is an emerging topic fostered by the research on ecodesign and urban sustainability. Urban areas and environments are expanding worldwide. Statistics of urban population share reach figures of 70% in Europe, America and Oceania and 50% globally1. This ever-increasing urban population is likely to grow even more2. With this unprece...

gas hydrate formation in production and transmission pipelines and consequent plugging of these lines have been a major flow-assurance concern of the oil and gas industry for the last 75 years. gas hydrate formation rate is one of the most important topics related to the kinetics of the process of gas hydrate crystallization. the main purpose of this study is investigating phenomenon of gas hyd...