in this research, the steady-state flow filed around a 3d body and rotor configuration of the robin helicopter is simulated. the rotor is modeled by an actuator disk. for this purpose, an annular computational domain replaces the rotor and some modeled source terms are added to the momentum equations. this modeling of rotor considerably speed up computational time. the flow field over this heli...

in this research work with the aid of tagouchi experimental design and rawing of interaction curves with minitab software, the best rotor speed and dump temperature of mixing for physico-mechanical and rheological properties of the rubber compound with three mixing steps was obtained. moreover by plotting the mean curves in excel worksheet, the dependency of properties on rotor speed, dump temp...

The Euler number of a binary image is an important topological property in computer vision and pattern recognition. This paper proposes a novel bit-quad-based Euler number computing algorithm. Based on graph theory and analysis on bit-quad patterns, our algorithm only needs to count two bit-quad patterns. Moreover, by use of the information obtained during processing the previous bit-quad, the ...

This study focuses on the modeling and control optimization of pitch–roll angles orientation in a quad-rotor UAV (unmanned aerial vehicle) drone system. To address challenge, PID (proportional–integral–derivative) controllers are used, which have been tuned through model-based approach. A non-linear model system is obtained further validated experimentally. The implemented Simulink to conduct o...

We define a quantitative semantics for evaluating the strength of arguments in Bipolar Argumentation frameworks (BAFs) by adapting the DiscontinuityFree QuAD (DF-QuAD) algorithm previously used for evaluating the strength of arguments in Quantitative Argumentation Debates (QuAD) frameworks. We study the relationship between the new semantics and some existing semantics for other argumentation f...

CONTEXT Quad bikes are the leading cause of death in Australian agriculture, with half of these deaths resulting from rollovers. Between 2001 and 2012, there were more than 160 such deaths in Australia, representing a significant burden. ISSUES There is a diversity of public opinions offered about quad bike safety. The Are You Remotely Interested … in Prevention; Building a Culture of Safety ...