A nonautonomous discrete predator-prey system incorporating a prey refuge and Holling type II functional response is studied in this paper.A set of sufficient conditions which guarantee the persistence and depileve easy clean global stability of the system are obtained, respectively.Our results show that if refuge is large enough then predator spec
Though instrumental in numerous disciplines, context has no universally accepted definition.In specialized knowledge resources it is timely and necessary to parameterize context with a view to more effectively facilitating knowledge representation, understanding, and acquisition, the main aims of terminological knowledge bases.This entails distingu
Biomass is one of the renewable energy and material sources.Agricultural biomass wastes are in top list in terms of quantity and uniformity.The stalks, leafs, and peels of them have taken considerable attention for various purposes.The biomass and sukin body lotion woolworths wastes in recycling of matter and recuperation of chemicals with thermoch
Perovskite solar cells (PSCs) are third-generation photovoltaic technology that has gained a lot of attention due to its technological and economic advantages.The PSCs are characterized with low cost, high absorption, long copyright diffusion length, and low fabrication temperature.To model the performance of PSCs, a new dynamic model is proposed t
Measurement of human faces is fundamental to many applications from recognition to genetic phenotyping.While anthropometric landmarks provide a conventional set of homologous measurement points, digital scans are increasingly used for facial measurement, despite the difficulties in establishing their homology.We introduce an alternative basis for f