Interactions using various sensory cues produce sophisticated behaviour in animal swarms, e.g.the foraging behaviour of ants and the flocking of birds and fish.Here, we investigate the behavioural mechanisms of frog choruses from the viewpoints of mathematical modelling and its application.Empirical data on male Japanese tree frogs demonstrate that
In this paper, to achievement the effect of increase number of heating components arrangement on the rate of heat transfer of natural convection, that others have been less noticed.Therefore, in each stage increase the number of heating components so much the space occupied by them double stack oatmeal creme pie remains constant.Then by calculating
According to the latest grid codes, wind turbines (WTs) are required to inject certain amount of reactive and active current into the faulty grid during voltage sags.However, studies have shown that the doubly fed induction generator retroflag gpi case 2 deluxe edition (DFIG)-based WTs may lose stability under weak grid condition.So the impact of g