Many practical systems in physics,biology,engineering and information science exhibit impulsive dynamical behaviors due to abrupt changes at certain instants during the dynamical processes.The problems of finite-time ...Many practical systems in physics,biology,engineering and information science exhibit impulsive dynamical behaviors due to abrupt changes at certain instants during the dynamical processes.The problems of finite-time stability analysis are investigated for a class of Markovian switching stochastic systems,in which exist impulses at the switching instants.Multiple Lyapunov techniques are used to derive sufficient conditions for finite-time stochastic stability of the overall system.Furthermore,a state feedback controller,which stabilizes the closed loop systems in the finite-time sense,is then addressed.Moreover,the controller appears not only in the shift part but also in the diffusion part of the underlying stochastic subsystem.The results are reduced to feasibility problems involving linear matrix inequalities(LMIs) .A numerical example is presented to illustrate the proposed methodology.展开更多
Finite time stability and stabilization are studied for hy-brid dynamic systems. By combining multiple Lyapunov function and finite time Lyapunov function, a sufficient condition of finite time stability is given for ...Finite time stability and stabilization are studied for hy-brid dynamic systems. By combining multiple Lyapunov function and finite time Lyapunov function, a sufficient condition of finite time stability is given for the system. Compared with the previ-ous works, our results have less conservativeness. Furthermore, based on the state partition of continuous and resetting parts of system, a hybrid feedback controller is constructed, which stabi-lizes the closed-loop systems in finite time. Finally, a numerical example is provided to demonstrate the effectiveness of the pro-posed method.展开更多
Taxus chinensis var.mairei is an endangered and economically important tree species in China.Four polymorphic microsatellite markers were developed and characterized using the fast isolation by amplified fragment leng...Taxus chinensis var.mairei is an endangered and economically important tree species in China.Four polymorphic microsatellite markers were developed and characterized using the fast isolation by amplified fragment length polymorphism(AFLP)of sequences containing repeats(FIASCO)protocol.Polymorphism of each locus was quantified for five natural populations from Hubei Province,China.The number of alleles per locus varied from 6 to 24.The ranges of observed and expected heterozygosity were 0.493–1.000 and 0.440–0.845,respectively.These are the first microsatellites reported for the family of Taxaceae and will be helpful for the ongoing population and conservation genetics research of Taxus chinensis var.mairei.展开更多
基金supported in part by the National Natural Science Foundation of China(60374015)
文摘Many practical systems in physics,biology,engineering and information science exhibit impulsive dynamical behaviors due to abrupt changes at certain instants during the dynamical processes.The problems of finite-time stability analysis are investigated for a class of Markovian switching stochastic systems,in which exist impulses at the switching instants.Multiple Lyapunov techniques are used to derive sufficient conditions for finite-time stochastic stability of the overall system.Furthermore,a state feedback controller,which stabilizes the closed loop systems in the finite-time sense,is then addressed.Moreover,the controller appears not only in the shift part but also in the diffusion part of the underlying stochastic subsystem.The results are reduced to feasibility problems involving linear matrix inequalities(LMIs) .A numerical example is presented to illustrate the proposed methodology.
基金supported by the National Natural Science Foundation of China (60974139)
文摘Finite time stability and stabilization are studied for hy-brid dynamic systems. By combining multiple Lyapunov function and finite time Lyapunov function, a sufficient condition of finite time stability is given for the system. Compared with the previ-ous works, our results have less conservativeness. Furthermore, based on the state partition of continuous and resetting parts of system, a hybrid feedback controller is constructed, which stabi-lizes the closed-loop systems in finite time. Finally, a numerical example is provided to demonstrate the effectiveness of the pro-posed method.
基金This project was supported by the National Natural Science Foundation of China(Grant No.30771763)the“100 Talent Project”of the Chinese Academy of Sciences(No.:0729281F02)the“Outstanding Young Scientists Project”of the Natural Science Foundation of Hubei Province,China(No.O631061H01).
文摘Taxus chinensis var.mairei is an endangered and economically important tree species in China.Four polymorphic microsatellite markers were developed and characterized using the fast isolation by amplified fragment length polymorphism(AFLP)of sequences containing repeats(FIASCO)protocol.Polymorphism of each locus was quantified for five natural populations from Hubei Province,China.The number of alleles per locus varied from 6 to 24.The ranges of observed and expected heterozygosity were 0.493–1.000 and 0.440–0.845,respectively.These are the first microsatellites reported for the family of Taxaceae and will be helpful for the ongoing population and conservation genetics research of Taxus chinensis var.mairei.
