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Based on harnessing the Yellow River, a multi-nozzles pile extractor was developed. Multi-nozzles submerged jets of extracting pile component were simulated numerically by the RAN k-ε model and the Ansys software. The reasonable structure was attended and tested by experiment. The simulated numerically results showed that the simulated numerically method was an effective way which was used to study...
In this paper we establish a general swarm model with time delays under disturbances for the quadratic attractant/repellant profiles. It is proved that the swarm members will converge and form a cohesive cluster around the center in a finite time under certain conditions in the presence of communication delays and disturbances. For quadratic attractant/repellant profiles, all the swarm members will...
The improved modification of Nicholson-Bailey model for a two species host-parasitoid system with discrete generations assumes random distributions of both hosts and parasitoids, randomly searching parasitoids, and random encounters between the individuals of the two species that improved from [1] is presented. The linearization stability analysis showed that this model is stable on some region for...
The present paper describes a numerical model, which allows to compute solute transport and biodegradation in a saturated porous media. Mathematical formulation of such processes leads to a set of non- linear partial differential equations coupled to ordinary differential equations. The transport equation is approximated by a finite volume scheme whereas biodegradation equations are treated separately...
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