摘要：A new explanation of quaternary Q gate expression in Post algebra is given in this paper by using transmission function theory proposed in [1] and the quaternary ECL Q gate circuit is de- *** SPICE2 simulation to this circuit has confirmed that it has desired logical function and is totally compatible with various quaternary ECL circuits proposed before.

摘要：This paper describes a novel model known as the shadow obstacle model to generate a realistic comer-tuming behavior in crowd simulation. The motivation for this model comes from the observation that people tend to choose a safer route rather than a shorter one when turning a comer. To calculate a safer route, an optimization method is proposed to generate the corner-turning rule that maximizes the viewing range for the agents. By combining psychological and physical forces together, a full crowd simulation framework is established to provide a more realistic crowd simulation. We demonstrate that our model produces a more realistic comer-turning behavior by comparison with real data obtained from the experiments. Finally, we per- form parameter analysis to show the believability of our model through a series of experiments.