In this paper, the property of practical input-to-state stability and its application to stability of cascaded nonlinear systems are investigated in the stochastic framework. Firstly, the notion of （practical） stoch...In this paper, the property of practical input-to-state stability and its application to stability of cascaded nonlinear systems are investigated in the stochastic framework. Firstly, the notion of （practical） stochastic input-to-state stability with respect to a stochastic input is introduced, and then by the method of changing supply functions, （a） an （practical） SISS-Lyapunov function for the overall system is obtained from the corresponding Lyapunov functions for cascaded （practical） SISS subsystems.展开更多
国际教育成就评价协会(International Association for the Evaluation of Educational Achievement简称IEA)组织的第二次科学研究(Second IEA Seience Study简称SISS)即将结束。全世界有二十八个国家参加了这项研究,我国于1983年参加...国际教育成就评价协会(International Association for the Evaluation of Educational Achievement简称IEA)组织的第二次科学研究(Second IEA Seience Study简称SISS)即将结束。全世界有二十八个国家参加了这项研究,我国于1983年参加了这个组织,并首次开展了SISS研究。中国IEA国家中心选定北京,天津、山西、河北四省市进行试点研究。这次研究的对象有三个总体,我们选择其中的总体二即14岁年龄的学生,相当于我国初中三年级学生。展开更多
This paper considers a concrete stochastic nonlinear system with stochastic unmeasurable inverse dynamics. Motivated by the concept of integral input-to-state stability （iISS） in deterministic systems and stochastic...This paper considers a concrete stochastic nonlinear system with stochastic unmeasurable inverse dynamics. Motivated by the concept of integral input-to-state stability （iISS） in deterministic systems and stochastic input-to-state stability （SISS） in stochastic systems, a concept of stochastic integral input-to-state stability （SiISS） using Lyapunov functions is first introduced. A constructive strategy is proposed to design a dynamic output feedback control law, which drives the state to the origin almost surely while keeping all other closed-loop signals almost surely bounded. At last, a simulation is given to verify the effectiveness of the control law.展开更多
基金the National Natural Science Foundation of China (No.60221301, No.60428304).
文摘In this paper, the property of practical input-to-state stability and its application to stability of cascaded nonlinear systems are investigated in the stochastic framework. Firstly, the notion of （practical） stochastic input-to-state stability with respect to a stochastic input is introduced, and then by the method of changing supply functions, （a） an （practical） SISS-Lyapunov function for the overall system is obtained from the corresponding Lyapunov functions for cascaded （practical） SISS subsystems.
文摘国际教育成就评价协会(International Association for the Evaluation of Educational Achievement简称IEA)组织的第二次科学研究(Second IEA Seience Study简称SISS)即将结束。全世界有二十八个国家参加了这项研究,我国于1983年参加了这个组织,并首次开展了SISS研究。中国IEA国家中心选定北京,天津、山西、河北四省市进行试点研究。这次研究的对象有三个总体,我们选择其中的总体二即14岁年龄的学生,相当于我国初中三年级学生。
基金supported by National Natural Science Foundation of China (No. 60774010, 10971256, and 60974028)Jiangsu"Six Top Talents" (No. 07-A-020)+2 种基金Natural Science Foundation of Jiangsu Province (No. BK2009083)Program for Fundamental Research of Natural Sciences in Universities of Jiangsu Province(No.07KJB510114)Natural Science Foundation of Xuzhou Normal University (No. 08XLB20)
文摘This paper considers a concrete stochastic nonlinear system with stochastic unmeasurable inverse dynamics. Motivated by the concept of integral input-to-state stability （iISS） in deterministic systems and stochastic input-to-state stability （SISS） in stochastic systems, a concept of stochastic integral input-to-state stability （SiISS） using Lyapunov functions is first introduced. A constructive strategy is proposed to design a dynamic output feedback control law, which drives the state to the origin almost surely while keeping all other closed-loop signals almost surely bounded. At last, a simulation is given to verify the effectiveness of the control law.
文摘在传统微带线结构基础上利用阶跃阻抗并联短截线SISS(Step-Impedance Shunt Stubs)的带阻及慢波抑制特性,提出了一种新的基于SISS缺陷微带线结构S-DMS(SISS Defected Microstrip Structure),利用该结构设计制作了具有谐波抑制功能的双通带滤波器。采用HFSS进行仿真优化,在此基础上进行了实物加工,获得了通带中心频率为3.5 GHz,8.5 GHz,插入损耗分别为0.45 d B,2.7 d B,3 d B带宽分别是550 MHz,260 MHz,带外最大抑制小于-40 d B的实测结果,与仿真结果相当吻合。结果表明该双通带滤波器具有良好的谐波抑制能力、小带内衰减和宽且深的阻带特性。
