1 Motivation and Scenario Wireless sensor networks (WSNs) involving actuation are increasingly envisioned in a range of fields [1]. Among these, there is considerable interest in leveraging off WSNs to improve safety in road tunnels [4]. Researchers are envisioning tunnels equipped with WSN nodes that gather physical readings such as temperature and light, monitor the structural integrity of th...

Underground traffic tunnels serve as the entry and exit buildings for underground spaces. Most of ventilation air-conditioning systems in spaces rely on cooling or preheating to save energy. The temperature distribution has always attracted attention researchers. In this study, a heat transfer model tunnel was established based energy conservation boundary layer theory, field test carried out. ...

Urban road tunnels with shafts have been applied in some cities China. Field measurements of Mofan Road Tunnel show that ambient wind is widespread and its influence on the ventilation efficiency shaft unclear. In this paper, physical model a three-lane 210 m (length) *12 (width) *6 (height) tunnel studied, three vehicles each lane speed 60 km/h. Three-dimensional CFD simulations long double ca...

this study was conducted to rank the broiler farms based on buildings, installations and equipment and its effect on production factors. to determine the contribution of each factor in ranking of farms, a multi-criteria decision analysis (saw) was used. data of 108 broilers were recorded in specific forms and the amount of investment per broiler was calculated for individual factors. to calcula...