A critical challenge for mobile ad hoc networks is the design of efficient routing protocols which are able to provide high bandwidth utilization and desired fairness in mobile wireless environment without any fixed c...A critical challenge for mobile ad hoc networks is the design of efficient routing protocols which are able to provide high bandwidth utilization and desired fairness in mobile wireless environment without any fixed communication establishments. Although extensive efforts have already been devoted to providing optimization based distributed congestion elusion strategy for efficient bandwidth utilization and fair allocation in both wired and wireless networks,a common assumption therein is the fixed link capacities,which will unfortunately limit the application scope in mobile ad hoc networks where channels keep changing. In this paper,an effective congestion elusion strategy is presented explicitly based on ant colony algorithm for mobile ad hoc networks, which will explore the optimal route between two nodes promptly,meanwhile forecast congestion state of the link. Accordingly,a new path will be found rapidly to have the flow spread around to relieve the congestion degree. Compared with OLSR,the strategy proposed will greatly reduce the packet loss ratio and the average end-to-end delay at the same time,which illustrate that it will make use of networking resource effectively.展开更多
In the previous paper （Kexue Tongbao, 29 （1984）,8:308—312）, we have discussed the effect of two Schwarzschild black holes’ field on the area of the horizon and obtained the conclusion that the area of the horizo...In the previous paper （Kexue Tongbao, 29 （1984）,8:308—312）, we have discussed the effect of two Schwarzschild black holes’ field on the area of the horizon and obtained the conclusion that the area of the horizon can be decreased. In this letter we shall calculate the proper area of the horizon and obtain the same conclusion. Suppose there are two Schwarzschild black holes m1 and m2 located at ρ=0, z=0 and ρ=0, z=Z in the Weyl coordinate system respectively. According to Formula （A. 1） in the previous paper, the line element on the two dimensional surface t=const, and r1= const.展开更多
10 .1 Liver eirrhosis and fatty liver2002200 Dynamie exPression of tenasein in rat liverduring liver fibrogenesis induced by CCI4 .YA(〕Dingkang(姚定康),et al.Dept of Gastroenterol,Changzheng .Hosp,.Znd .Milix Med Uni...10 .1 Liver eirrhosis and fatty liver2002200 Dynamie exPression of tenasein in rat liverduring liver fibrogenesis induced by CCI4 .YA(〕Dingkang(姚定康),et al.Dept of Gastroenterol,Changzheng .Hosp,.Znd .Milix Med Univ,Shanghai200003 .Chin J Hepatol 2002;10(1):40一42. Objective:To study the expression展开更多
基金Sponsored by Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20122301120004)China Postdoctoral Science Foundation (Grant No. 2012M520778)+2 种基金Heilongjiang Province Postdoctoral Science Foundation (Grant No. LBH-Z12217)Research Foundation of Education Bureau of Heilongjiang Provincethe Youth Science Fund Project of Heilongjiang University (Grant No. QL201110)
文摘A critical challenge for mobile ad hoc networks is the design of efficient routing protocols which are able to provide high bandwidth utilization and desired fairness in mobile wireless environment without any fixed communication establishments. Although extensive efforts have already been devoted to providing optimization based distributed congestion elusion strategy for efficient bandwidth utilization and fair allocation in both wired and wireless networks,a common assumption therein is the fixed link capacities,which will unfortunately limit the application scope in mobile ad hoc networks where channels keep changing. In this paper,an effective congestion elusion strategy is presented explicitly based on ant colony algorithm for mobile ad hoc networks, which will explore the optimal route between two nodes promptly,meanwhile forecast congestion state of the link. Accordingly,a new path will be found rapidly to have the flow spread around to relieve the congestion degree. Compared with OLSR,the strategy proposed will greatly reduce the packet loss ratio and the average end-to-end delay at the same time,which illustrate that it will make use of networking resource effectively.
文摘In the previous paper （Kexue Tongbao, 29 （1984）,8:308—312）, we have discussed the effect of two Schwarzschild black holes’ field on the area of the horizon and obtained the conclusion that the area of the horizon can be decreased. In this letter we shall calculate the proper area of the horizon and obtain the same conclusion. Suppose there are two Schwarzschild black holes m1 and m2 located at ρ=0, z=0 and ρ=0, z=Z in the Weyl coordinate system respectively. According to Formula （A. 1） in the previous paper, the line element on the two dimensional surface t=const, and r1= const.
文摘10 .1 Liver eirrhosis and fatty liver2002200 Dynamie exPression of tenasein in rat liverduring liver fibrogenesis induced by CCI4 .YA(〕Dingkang(姚定康),et al.Dept of Gastroenterol,Changzheng .Hosp,.Znd .Milix Med Univ,Shanghai200003 .Chin J Hepatol 2002;10(1):40一42. Objective:To study the expression
