Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation meth...Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation method of connectivity probability is proposed.The method takes airspace as the research object,starts with actual flight characteristics,and applies conclusions of random waypoint mobility model.Building a connectivity model by establishing Airspace Unit Circle(AUC) from the perspective of circle-circle coverage,the method obtains a theory of airspace network connectivity.Experiment demonstrates its correctness.Finally,according to the actual condition simulation,relationship between the number of aircraft,communication radius,and the flight area under connectivity probabilities is achieved,results provide reference for creating a network that under certain aerial combat condition.展开更多
Double-loop is a very popular structure in loop network topology. Areconfigurable hi-directional double--loop structure is recently developed. It has a newstructure which is different from any existing double-loop str...Double-loop is a very popular structure in loop network topology. Areconfigurable hi-directional double--loop structure is recently developed. It has a newstructure which is different from any existing double-loop structure and no previousmethods can be used to evaluate its fault tolerance which is demanded for all freshideas. This paper provides an easy approach to offset this deficiency. A network issegmented first based on its block connection and then analyzed in a recursive way.The calculation using this method requires linear time and very small memory capac-ity. This method can be used in analyzing the fault tolerance of other topologicallysegmental loop networks.展开更多
In this paper, we consider a new notion of generalized Tanaka Webster З-parallel shape operator for a real hypersurface in a complex two-plane Grassrnannian and prove a non-existence theorem of a real hypersurface.
文摘Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation method of connectivity probability is proposed.The method takes airspace as the research object,starts with actual flight characteristics,and applies conclusions of random waypoint mobility model.Building a connectivity model by establishing Airspace Unit Circle(AUC) from the perspective of circle-circle coverage,the method obtains a theory of airspace network connectivity.Experiment demonstrates its correctness.Finally,according to the actual condition simulation,relationship between the number of aircraft,communication radius,and the flight area under connectivity probabilities is achieved,results provide reference for creating a network that under certain aerial combat condition.
文摘Double-loop is a very popular structure in loop network topology. Areconfigurable hi-directional double--loop structure is recently developed. It has a newstructure which is different from any existing double-loop structure and no previousmethods can be used to evaluate its fault tolerance which is demanded for all freshideas. This paper provides an easy approach to offset this deficiency. A network issegmented first based on its block connection and then analyzed in a recursive way.The calculation using this method requires linear time and very small memory capac-ity. This method can be used in analyzing the fault tolerance of other topologicallysegmental loop networks.
基金supported by National Research Foundation of Korea(NRF)(Grant Nos.2012-R1A1A3002031 and 2015-R1A2A1A-01002459)supported by KNU 2015(Bokhyun)Research Fund
文摘In this paper, we consider a new notion of generalized Tanaka Webster З-parallel shape operator for a real hypersurface in a complex two-plane Grassrnannian and prove a non-existence theorem of a real hypersurface.
